Product Folder Sample & Buy Technical Documents Support & Community Tools & Software SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 SNx4LS24x, SNx4S24x Octal Buffers and Line Drivers With 3-State Outputs 1 Features 3 Description * The SNx4LS24x, SNx4S24x octal buffers and line drivers are designed specifically to improve both the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical, active-low outputcontrol (G) inputs, and complementary output-control (G and G) inputs. These devices feature high fan-out, improved fan-in, and 400-mV noise margin. The SN74LS24x and SN74S24x devices can be used to drive terminated lines down to 133 . 1 * * * * Inputs Tolerant Down to 2 V, Compatible With 3.3-V or 2.5-V Logic Inputs Maximum tpd of 15 ns at 5 V 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers PNP Inputs Reduce DC Loading Hysteresis at Inputs Improves Noise Margins 2 Applications * * * * * * Servers LED Displays Network Switches Telecom Infrastructure Motor Drivers I/O Expanders Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) CDIP (20) - J 24.20 mm x 6.92 mm CFP (20) - W 7.02 mm x 13.72 mm LCCC (20) - FK 8.89 mm x 8.89 mm SSOP (20) - DB 7.20 mm x 5.30 mm SN74LS24x, SN74S24x SOIC (20) - DW 12.80 mm x 7.50 mm PDIP (20) - N 24.33 mm x 6.35 mm SN74LS24x SOP (20) - NS 7.80 mm x 12.60 mm SN54LS24x, SN54S24x SN74LS240, SN74LS244 (1) For all available packages, see the orderable addendum at the end of the data sheet. Logic Diagram (Positive Logic) /6240, 6240 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com Table of Contents 1 2 3 4 5 6 7 Features .................................................................. Applications ........................................................... Description ............................................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 2 3 4 6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 4 4 4 5 5 5 6 6 7 Absolute Maximum Ratings ...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information ................................................. Electrical Characteristics - SNx4LS24x.................... Electrical Characteristics - SNx4S24x...................... Switching Characteristics - SNx4LS24x................... Switching Characteristics - SNx4S24x..................... Typical Characteristics .............................................. Parameter Measurement Information .................. 7 7.1 SN54LS24x and SN74LS24x Devices...................... 7 7.2 SN54S24x and SN74S24x Devices.......................... 9 8 Detailed Description ............................................ 11 8.1 Overview ................................................................. 11 8.2 Functional Block Diagrams ..................................... 11 8.3 Feature Description................................................. 12 8.4 Device Functional Modes........................................ 12 9 Application and Implementation ........................ 14 9.1 Application Information............................................ 14 9.2 Typical Application .................................................. 14 9.3 System Examples ................................................... 15 10 Power Supply Recommendations ..................... 17 11 Layout................................................................... 17 11.1 Layout Guidelines ................................................. 17 11.2 Layout Example .................................................... 17 12 Device and Documentation Support ................. 18 12.1 12.2 12.3 12.4 12.5 12.6 Related Links ........................................................ Receiving Notification of Documentation Updates Community Resource............................................ Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 18 18 18 18 18 18 13 Mechanical, Packaging, and Orderable Information ........................................................... 19 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision C (May 2010) to Revision D Page * Added Applications section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section................................................................ 1 * Deleted Ordering Information table; see POA at the end of the data sheet........................................................................... 1 * Changed RJA values in the Thermal Information table from 70 to 94.3 (DB), from 58 to 90.3 (DW), from 69 to 50.6 (N), and from 60 to 76.6 (NS)................................................................................................................................................. 5 2 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 5 Pin Configuration and Functions DB, DW, J, N, NS, or W Package 20-Pin SSOP, SOIC, CDIP, PDIP, SOP, or CFP Top View 2Y3 5 16 1Y2 1A3 6 15 2A3 2Y2 7 14 1A4 8 2Y1 GND 2G/2G 2A4 19 1Y1 17 VCC 18 4 20 3 1A2 1G 2Y4 1 2G/2G 1A1 VCC 19 2 20 2 2Y4 1 3 1G 1A1 FK Package 20-Pin LCCC Top View 1Y3 2Y3 5 17 2A4 13 2A2 1A3 6 16 1Y2 9 12 1Y4 2Y2 7 15 2A3 10 11 2A1 1A4 8 14 1Y3 2A2 1Y4 2A1 GND 2Y1 9 Not to scale 13 1Y1 12 18 11 4 10 1A2 Not to scale Pin Functions PIN NO. NAME I/O DESCRIPTION 1 1G I Channel 1 output enable 2 1A1 I Channel 1, A side 1 3 2Y4 O Channel 2, Y side 4 4 1A2 I Channel 1, A side 2 5 2Y3 O Channel 2, Y side 3 6 1A3 I Channel 1, A side 3 7 2Y2 O Channel 2, Y side 2 8 1A4 I Channel 1, A side 4 9 2Y1 O Channel 2, Y side 1 10 GND -- Ground 11 2A1 I Channel 2, A side 1 12 1Y4 O Channel 1, Y side 4 13 2A2 I Channel 2, A side 2 14 1Y3 O Channel 1, Y side 3 15 2A3 I Channel 2, A side 3 16 1Y2 O Channel 1, Y side 2 17 2A4 I Channel 2, A side 4 18 1Y1 O Channel 1, Y side 1 I Channel 2 output enable 19 2G/2G 20 VCC (1) (1) -- Power supply 2G for SNx4LS241 and SNx4S241 or 2G for all other drivers. Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 3 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN Supply voltage, VCC (2) Input voltage, VI V 7 SNx4S24x 5.5 Storage temperature, Tstg (2) UNIT 7 SNx4LS24x Off-state output voltage (1) MAX -65 V 5.5 V 150 C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Voltage values are with respect to network ground terminal. 6.2 ESD Ratings VALUE UNIT Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1) 500 V Charged device model (CDM), per JEDEC specification JESD22-C101 (2) 500 V ALL PACKAGES V(ESD) Electrostatic discharge N PACKAGE V(ESD) (1) (2) Electrostatic discharge JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) VCC Supply voltage (1) VIH High-level input voltage VIL Low-level input voltage IOH High-level output current IOL Low-level output current MIN NOM MAX SN54xS24x 4.5 5 5.5 SN74xS24x 4.75 5 5.25 2 (1) (2) 4 Operating free-air temperature (2) V V SN54LS24x 0.7 SN54S24x, SN74xS24x 0.8 SN54xS24x -12 SN74xS24x -15 SN54LS24x 12 SN54S24x 48 SN74LS24x 24 SN74S24x 64 External resistance between any input and VCC or ground (SNx4S24x only) TA UNIT 40 SN54xS24x -55 125 SN74xS24x 0 70 V mA mA k C Voltage values are with respect to network ground terminal. An SN54S241J operating at free-air temperature above 116C requires a heat sink that provides a thermal resistance from case to free air, RCA, of not more that 40C/W. Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 6.4 Thermal Information THERMAL METRIC SN74LS240, SN74LS244 (1) SN74LS24x, SN74S24x SN74LS24x DB (SSOP) DW (SOIC) N (PDIP) NS (SOP) 20 PINS 20 PINS 20 PINS 20 PINS (2) (3) UNIT RJA Junction-to-ambient thermal resistance 94.3 90.3 50.6 76.6 C/W RJC(top) Junction-to-case (top) thermal resistance 55.9 45.5 37.4 42.9 C/W RJB Junction-to-board thermal resistance 49.5 48.1 31.5 44.1 C/W JT Junction-to-top characterization parameter 21.3 19.4 24 19.2 C/W JB Junction-to-board characterization parameter 49.1 47.6 31.4 43.7 C/W (1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. Voltage values are with respect to network ground terminal. The package thermal impedance is calculated in accordance with JESD 51-7. (2) (3) 6.5 Electrical Characteristics - SNx4LS24x over recommended operating free-air temperature range (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN TYP (2) VIK VCC = MIN, II = -18 mA Hysteresis (VT+ - VT-) VCC = MIN 0.2 0.4 VCC = MIN, IOH = -3 mA, VIH = 2 V, VIL = MAX 2.4 3.4 VOH VCC = MIN, IOH = MAX, VIH = 2 V, VIL = 0.5 V MAX UNIT -1.5 V V V 2 IOL = 12 mA, SN54LS24x 0.4 IOL = 24 mA, SN74LS24x 0.5 VOL VCC = MIN, VIL = MAX, VIH = 2 V IOZH VCC = MAX, VIL = MAX, VIH = 2 V, VO = 2.7 V 20 IOZL VCC = MAX, VIL = MAX, VIH = 2 V, VO = 0.4 V -20 A II VCC = MAX, VI = 7 V 0.1 mA IIH VCC = MAX, VI = 2.7 V IIL VCC = MAX, VIL = 0.4 V IOS (3) VCC = MAX -40 Outputs high ICC Outputs low VCC = MAX, output open Outputs disabled (1) (2) (3) V A 20 A -0.2 mA -225 mA All 17 27 SNx4LS240 26 44 SNx4LS241, SNx4LS244 27 46 SNx4LS240 29 50 SNx4LS241, SNx4LS244 32 54 mA For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions. All typical values are at VCC = 5 V and TA = 25C. Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second. 6.6 Electrical Characteristics - SNx4S24x over recommended operating free-air temperature range (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN VIK VCC = MIN, II = -18 mA Hysteresis (VT+ - VT-) VCC = MIN 0.2 VCC = MIN, IOH = -1 mA, VIH = 2 V, VIL = 0.8 V, SN74S24x only 2.7 VCC = MIN, IOH = -3 mA, VIH = 2 V, VIL = 0.8 V 2.4 VOH VCC = MIN, IOH = MAX, VIH = 2 V, VIL = 0.5 V VOL (1) (2) VCC = MIN, VIL = MAX, VIH = 2 V, IOL = 0.8 V TYP (2) MAX UNIT -1.2 V 0.4 V 3.4 V 2 0.55 V For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions. All typical values are at VCC = 5 V, TA = 25C. Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 5 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com Electrical Characteristics - SNx4S24x (continued) over recommended operating free-air temperature range (unless otherwise noted) TEST CONDITIONS (1) PARAMETER MIN TYP (2) MAX UNIT IOZH VCC = MAX, VIL = 0.8 V, VIH = 2 V, VO = 2.4 V 50 IOZL VCC = MAX, VIL = MAX, VIH = 2 V, VO = 0.5 V -50 A II VCC = MAX, VI = 5.5 V 1 mA IIH VCC = MAX, VI = 2.7 V 50 A IIL VCC = MAX, VIL = 0.5 V IOS (3) VCC = MAX Any A -400 A Any G -2 mA -225 mA -50 Outputs high SN54S240 80 123 SN74S240 80 135 SN54S241, SN54S244 95 147 SN74S241, SN74S244 ICC VCC = MAX, output open Outputs low Outputs disabled (3) A 95 160 SN54S240 100 145 SN74S240 100 150 SN54S241, SN54S244 120 170 SN74S241, SN74S244 120 180 SN54S240 100 145 SN74S240 100 150 SN54S241, SN54S244 120 170 SN74S241, SN74S244 120 180 mA Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second. 6.7 Switching Characteristics - SNx4LS24x VCC = 5 V, TA = 25C (see SN54LS24x and SN74LS24x Devices) PARAMETER TEST CONDITIONS MIN SNx4LS240 TYP MAX 9 14 12 18 UNIT tPLH RL = 667 , CL = 45 pF tPHL RL = 667 , CL = 45 pF 12 18 ns tPZL RL = 667 , CL = 45 pF 20 30 ns tPZH RL = 667 , CL = 45 pF 15 23 ns tPLZ RL = 667 , CL = 5 pF 10 20 ns tPHZ RL = 667 , CL = 5 pF 15 25 ns TYP MAX 4.5 7 6 9 4.5 7 6 9 10 15 6.5 10 8 12 SNx4LS241, SNx4LS244 ns 6.8 Switching Characteristics - SNx4S24x VCC = 5 V and TA = 25C (see SN54S24x and SN74S24x Devices) PARAMETER TEST CONDITIONS SNx4S240 MIN UNIT tPLH RL = 90 , CL = 50 pF tPHL RL = 90 , CL = 50 pF tPZL RL = 90 , CL = 50 pF tPZH RL = 90 , CL = 50 pF tPLZ RL = 90 , CL = 5 pF 10 15 ns tPHZ RL = 90 , CL = 5 pF 6 9 ns 6 Submit Documentation Feedback SNx4S241, SNx4S244 SNx4S240 SNx4S241, SNx4S244 SNx4S240 SNx4S241, SNx4S244 ns ns ns ns Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 6.9 Typical Characteristics VCC = 5 V, TA = 25C, CL = 45 pF, and RL = 667 (unless otherwise noted) 5.5 4.5 Voltage (V) 3.5 2.5 1.5 0.5 Input Output -0.5 0 5 10 Time (ns) 15 20 D001 Figure 1. Simulated Propagation Delay From Input to Output 7 Parameter Measurement Information 7.1 SN54LS24x and SN74LS24x Devices Test Point VCC VCC Test Point RL From Output Under Test (see Note B) CL (see Note A) RL S1 From Output Under Test CL (see Note A) (see Note B) 5 k S2 Figure 2. Load Circuit, For 2-State Totem-Pole Outputs Figure 4. Load Circuit, For 3-State Outputs VCC RL From Output Under Test CL (see Note A) Test Point Figure 3. Load Circuit, For Open-Collector Outputs Copyright (c) 1985-2016, Texas Instruments Incorporated High-Level Pulse 1.3 V 1.3 V tw Low-Level Pulse 1.3 V 1.3 V Figure 5. Voltage Waveforms, Pulse Durations Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 7 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 3V 3V Timing Input Input 1.3 V 1.3 V 1.3 V 0V 0V th tsu Data Input tPLH 3V 1.3 V In-Phase Output (see Note D) 1.3 V 0V Figure 6. Voltage Waveforms, Setup and Hold Times tPHL VOH 1.3 V 1.3 V VOL tPHL Out-of-Phase Output (see Note D) tPLH VOH 1.3 V 1.3 V VOL Figure 7. Voltage Waveforms, Propagation Delay Times Output Control (low-level enabling) 3V 1.3 V 0V tPZL Waveform 1 (see Notes C and D) tPLZ 1.5 V 1.3 V VOL + 0.3 V VOL tPZH Waveform 2 (see Notes C and D) 1.3 V tPHZ VOH 1.3 V VOH - 0.3 V 1.5 V A. CL includes probe and jig capacitance. B. All diodes are 1N3064 or equivalent. C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. D. S1 and S2 are closed for tPLH, tPHL, tPHZ, and tPLZ; S1 is open and S2 is closed for tPZH; S1 is closed and S2 is open for tPZL. E. Phase relationships between inputs and outputs have been chosen arbitrarily for these examples. F. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO is approximately 50 , tr 15 ns, tf 6 ns. G. The outputs are measured one at a time with one input transition per measurement. Figure 8. Voltage Waveforms, Enable and Disable Times, 3-State Outputs 8 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 7.2 SN54S24x and SN74S24x Devices Test Point VCC High-Level Pulse 1.5 V RL From Output Under Test (see Note B) CL (see Note A) tw Low-Level Pulse 1.5 V 1.5 V 0V th tsu 3V Data Input RL From Output Under Test CL (see Note A) 3V Timing Input VCC Test Point 1.5 V 1.5 V 0V Figure 13. Voltage Waveforms, Setup and Hold Times 3V Input RL S1 (see Note B) 1 k 1.5 V tPLH In-Phase Output (see Note D) VCC From Output Under Test 1.5 V 0V Figure 10. Load Circuit, For Open-Collector Outputs CL (see Note A) 1.5 V Figure 12. Voltage Waveforms, Pulse Durations Figure 9. Load Circuit, For 2-State Totem-Pole Outputs Test Point 1.5 V tPHL VOH 1.5 V VOL tPHL Out-of-Phase Output (see Note D) 1.5 V tPLH VOH 1.5 V 1.5 V VOL Figure 14. Voltage Waveforms, Propagation Delay Times S2 Figure 11. Load Circuit, For 3-State Outputs Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 9 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 3V Output Control (low-level enabling) 1.5 V 0V tPZL Waveform 1 (see Notes C and D) tPLZ 1.5 V 1.5 V VOL VOL + 0.5 V tPHZ tPZH Waveform 2 (see Notes C and D) 1.5 V VOH 1.5 V VOH - 0.5 V 1.5 V A. CL includes probe and jig capacitance. B. All diodes are 1N3064 or equivalent. C. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. D. S1 and S2 are closed for tPLH, tPHL, tPHZ, and tPLZ; S1 is open and S2 is closed for tPZH; S1 is closed and S2 is open for tPZL. E. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO is approximately 50 ; tr and tf 7 ns for SN54LS24x and SN74LS24x devices, and tr and tf 2.5 ns for SN54S24x and SN74S24x devices. F. The outputs are measured one at a time with one input transition per measurement. Figure 15. Voltage Waveforms, Enable and Disable Times, 3-State Outputs 10 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 8 Detailed Description 8.1 Overview This device is organized as two 4-bit buffers and drivers with separate output-enable (G) inputs. When G is low, the device passes data from the A inputs to the Y outputs. When G is high, the outputs are in the high impedance state. Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in a mixed 3.3-V and 5-V system environment. To ensure the high-impedance state during power up or power down, G must be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. 8.2 Functional Block Diagrams 1G 1 1G 1A1 2 18 1Y1 1A1 1A2 4 16 1Y2 1A2 1A3 6 14 1Y3 1A3 1A4 8 12 1Y4 1A4 2G 2A1 2A2 2A3 2A4 19 2G 11 13 15 17 9 7 5 3 2Y1 2A1 2Y2 2A2 2Y3 2A3 2Y4 2A4 1 2 18 4 16 6 14 8 12 1Y1 1Y2 1Y3 1Y4 19 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 Copyright (c) 2016, Texas Instruments Incorporated Copyright (c) 2016, Texas Instruments Incorporated Pin numbers shown are for DB, DW, J, N, NS, and W packages Pin numbers shown are for DB, DW, J, N, NS, and W packages Figure 16. SNx4LS240 and SNx4S240 Logic Diagram Copyright (c) 1985-2016, Texas Instruments Incorporated Figure 17. SNx4LS241 and SNx4S241 Logic Diagram Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 11 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 1 1G 1A1 1A2 1A3 1A4 2G 2A1 2A2 2A3 2A4 2 18 4 16 6 14 8 12 1Y1 1Y2 1Y3 1Y4 19 11 9 13 7 15 5 17 3 2Y1 2Y2 2Y3 2Y4 Copyright (c) 2016, Texas Instruments Incorporated Pin numbers shown are for DB, DW, J, N, NS, and W packages Figure 18. SNx4LS244 and SNx4S244 Logic Diagram 8.3 Feature Description 8.3.1 3-State Outputs The 3-state outputs can drive bus lines directly. All outputs can be put into high impedance mode through the G pin. 8.3.2 PNP Inputs This device has PNP inputs which reduce dc loading on bus lines. 8.3.3 Hysteresis on Bus Inputs The bus inputs have built-in hysteresis that improves noise margins. 8.4 Device Functional Modes The SNx4LS24x and SNx4S24x devices can be used as inverting and non-inverting bus buffers for data line transmission and can isolate input to output by setting the G pin HIGH. Table 1, Table 2, and Table 3 list the function tables for all devices. Table 1. SNx4LS240 and SNx4S240 Function Table INPUTS G 12 Submit Documentation Feedback OUTPUTS A Y L L H L H L H X Z Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 Table 2. SNx4LS241 and SNx4S241 Function Table CHANNEL 1 CHANNEL 2 INPUTS OUTPUT INPUTS OUTPUT 1G 1A 1Y 2G 2A 2Y L L L H L L L H H H H H H X Z L X Z Table 3. SNx4LS244 and SNx4S244 Function Table INPUTS OUTPUTS G A Y L L L L H H H X Z VCC VCC 9 k NOM R Input Output GND Copyright (c) 2016, Texas Instruments Incorporated Figure 19. SNx4LS240, SNx4LS241, SNx4LS244 Equivalent of Each Input Copyright (c) 2016, Texas Instruments Incorporated VCC Req SNx4LS240, SNx4LS241, SNx4LS244: R = 50 NOM SNx4S240, SNx4S241, SNx4S244: R = 25 NOM Figure 21. Typical of All Outputs Input Copyright (c) 2016, Texas Instruments Incorporated G and G inputs: Req = 2 k NOM A inputs: Req = 2.8 k NOM Figure 20. SNx4S240, SNx4S241, SNx4S244 Equivalent of Each Input Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 13 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI's customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The SNx4LS24x, SNx4S24x octal buffers and line drivers are designed to be used for a multitude of bus interface type applications where output drive or PCB trace length is a concern. 9.2 Typical Application Driver 1/8 'LS241/'S241 Long-Line Repeater 1/8 'LS241/'S241 Repeater 1/8 'LS241/'S241 Input Repeater 1/8 'LS241/'S241 Receiver 1/8 'LS241/'S241 Output CL 2.9 V 1.6 V 1.2 V 0.3 V Input Output Input Output Input Output Input Output Input Output Copyright (c) 2016, Texas Instruments Incorporated Figure 22. SNx4LS241 and SNx4S241 Used as Repeater or Level Restorer 9.2.1 Design Requirements This device uses Schottky transistor logic technology. Take care to avoid bus contention because it can drive currents that would exceed maximum limits. The high drive creates fast edges into light loads, so routing and load conditions must be considered to prevent ringing. 9.2.2 Detailed Design Procedure * Power Supply - Each device must maintain a supply voltage between 4.5 V and 5.5 V. * Inputs - Input signals must meet the VIH and VIL specifications in Electrical Characteristics - SNx4LS24x. - Inputs leakage values (II, IIH, IIL) from Electrical Characteristics - SNx4LS24x must be considered. * Outputs - Output signals are specified to meet the VOH and VOL specifications in Electrical Characteristics - SNx4LS24x as a minimum (the values could be closer to VCC for high signals or GND for low signals). - TI recommends maintaining output currents as specified in Recommended Operating Conditions. - The part can be damaged by sourcing or sinking too much current (see Electrical Characteristics - SNx4LS24x for details). 14 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 Typical Application (continued) 9.2.3 Application Curve 0.5 0.4 VCC @ 4.75 V VOL (max) V 0.3 0.2 0.1 0 3 6 9 12 15 18 21 24 27 I OL (mA) Figure 23. VOL vs IOL 9.3 System Examples The SNx4LS240 and SNx4S240 devices can be used to buffer signals along a memory bus. The increased output drive helps data transmission reliability. Figure 24 shows a schematic of this example. Control or Microprogram ROM/PROM or Memory Address Register 'Ls240/ 'S240 Output Control System and/or Memory-Address Bus Copyright (c) 2016, Texas Instruments Incorporated 4-bit organization can be applied to handle binary or BCD Figure 24. SNx4LS240 and SNx4S240 Used as System or Memory Bus Driver The SNx4LS240 and SNx4S240 devices have two independently controlled 4-bit drivers, and can be used to buffer signals in a bidirectional manner along a data bus. Figure 25 shows the SNx4LS240 or SNx4S240 used in this manner. Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 15 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com System Examples (continued) 'LS240/'S240 From Data Bus Output Ports G Output-Port Control From Data Bus Input Ports G Input-Port Control Copyright (c) 2016, Texas Instruments Incorporated Figure 25. Independent 4-Bit But Drivers/Receivers in a Single Package The enable pins on the SNx4LS241 and SNx4S241 devices can be used to help direct signals along a shared party-line bus. Figure 26 shows a general configuration of how to implement this structure. Take care to ensure that bus contention does not occur. Party-Line Multiple-Input/Output Bus 1/4 'LS241/'S241 Driver 1/4 'LS241/'S241 Driver Input A To Other Buffers Input B To Other Buffers Output A Output B Bus Control H H L L H H L L H L Receivers Input Output Bus Control B A L L B B H L A B H H A A L H None None L H Copyright (c) 2016, Texas Instruments Incorporated Figure 26. Party-Line Bus System With Multiple Inputs, Outputs, and Receivers 16 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 10 Power Supply Recommendations The power supply can be any voltage between the minimum and maximum supply voltage rating located in Recommended Operating Conditions. Each VCC pin must have a good bypass capacitor to prevent power disturbance. For devices with a single supply, TI recommends a 0.1-F bypass capacitor. If there are multiple VCC pins, TI recommends a 0.01-F or 0.022-F bypass capacitors for each power pin. It is acceptable to parallel multiple bypass capacitors to reject different frequencies of noise. Two bypass capacitors of value 0.1 F and 1 F are commonly used in parallel. For best results, install the bypass capacitor(s) as close to the power pin as possible. 11 Layout 11.1 Layout Guidelines When using multiple bit logic devices, inputs must not be left floating. In many applications, some channels of the SNx4LS24x, SNx4S24x are unused, and thus must be terminated properly. Because each transceiver channel pin can be either an input or an output, they must be treated as both when being terminated. Ground or VCC (whichever is more convenient) can be used to terminate unused inputs; however, each unused channel should be terminated to the same logic level on both the A and Y side. For example, in Figure 27 unused channels are terminated correctly with both sides connected to the same voltage, while channel 8 is terminated incorrectly with each side being tied to a different voltage. The G input is also unused in this example, and is terminated directly to ground to permanently enable all outputs. 11.2 Layout Example VCC Unused Input Input Output Unused Input Output Input Figure 27. Example Demonstrating How to Terminate Unused Inputs and Channels of a Transceiver Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 17 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 www.ti.com 12 Device and Documentation Support 12.1 Related Links The table below lists quick access links. Categories include technical documents, support and community resources, tools and software, and quick access to sample or buy. Table 4. Related Links PARTS PRODUCT FOLDER SAMPLE & BUY TECHNICAL DOCUMENTS SUPPORT & COMMUNITY SN54LS240 Click here Click here Click here Click here SN74LS241 Click here Click here Click here Click here SN74LS244 Click here Click here Click here Click here SN54S240 Click here Click here Click here Click here SN54S241 Click here Click here Click here Click here SN54S244 Click here Click here Click here Click here SN74LS240 Click here Click here Click here Click here SN74LS241 Click here Click here Click here Click here SN74LS244 Click here Click here Click here Click here SN74S240 Click here Click here Click here Click here SN74S241 Click here Click here Click here Click here SN74S241 Click here Click here Click here Click here 12.2 Receiving Notification of Documentation Updates To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper right corner, click on Alert me to register and receive a weekly digest of any product information that has changed. For change details, review the revision history included in any revised document. 12.3 Community Resource The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2ETM Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.4 Trademarks E2E is a trademark of Texas Instruments. All other trademarks are the property of their respective owners. 12.5 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.6 Glossary SLYZ022 -- TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 18 Submit Documentation Feedback Copyright (c) 1985-2016, Texas Instruments Incorporated Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 www.ti.com SDLS144D - APRIL 1985 - REVISED OCTOBER 2016 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Copyright (c) 1985-2016, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240 SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244 19 PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) 5962-7801201VSA ACTIVE CFP W 20 25 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 5962-7801201VS A SNV54LS240W 7705701RA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7705701RA SNJ54LS244J 7705701SA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7705701SA SNJ54LS244W 78012012A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 78012012A SNJ54LS 240FK 7801201RA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7801201RA SNJ54LS240J 7801201SA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7801201SA SNJ54LS240W JM38510/32401B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401B2A JM38510/32401BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401BRA JM38510/32401BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401BSA JM38510/32402B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402B2A JM38510/32402BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402BRA JM38510/32402BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402BSA JM38510/32403B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403B2A JM38510/32403BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403BRA JM38510/32403BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403BSA JM38510/32403SRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403SRA Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) JM38510/32403SSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403SSA M38510/32401B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401B2A M38510/32401BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401BRA M38510/32401BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32401BSA M38510/32402B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402B2A M38510/32402BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402BRA M38510/32402BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32402BSA M38510/32403B2A ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403B2A M38510/32403BRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403BRA M38510/32403BSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403BSA M38510/32403SRA ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403SRA M38510/32403SSA ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 JM38510/ 32403SSA SN54LS240J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54LS240J SN54LS241J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54LS241J SN54LS244J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54LS244J SN54S240J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54S240J SN54S241J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SN54S241J Addendum-Page 2 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) SN54S244J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type SN74LS240DBR ACTIVE SSOP DB 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM SN74LS240DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS240 SN74LS240DWG4 ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS240 SN74LS240DWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS240 SN74LS240N ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS240N SN74LS240NE4 ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS240N SN74LS240NSR ACTIVE SO NS 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74LS240 SN74LS241DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS241 SN74LS241DWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS241 SN74LS241N ACTIVE PDIP N 20 20 RoHS & Non-Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS241N SN74LS241NSR ACTIVE SO NS 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74LS241 SN74LS244DBR ACTIVE SSOP DB 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DBRG4 ACTIVE SSOP DB 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DWE4 ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DWG4 ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244DWRE4 ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 LS244 SN74LS244N ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS244N SN74LS244NE4 ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74LS244N Addendum-Page 3 -55 to 125 SN54S244J LS240 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) SN74LS244NSR ACTIVE SO NS 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74LS244 SN74LS244NSRG4 ACTIVE SO NS 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74LS244 SN74S240DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S240 SN74S240DWG4 ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S240 SN74S240N ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74S240N SN74S240NE4 ACTIVE PDIP N 20 20 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74S240N SN74S241DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S241 SN74S241N ACTIVE PDIP N 20 20 RoHS & Non-Green NIPDAU N / A for Pkg Type 0 to 70 SN74S241N SN74S244DW ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S244 SN74S244DWG4 ACTIVE SOIC DW 20 25 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S244 SN74S244DWR ACTIVE SOIC DW 20 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 S244 SN74S244N ACTIVE PDIP N 20 20 RoHS & Non-Green NIPDAU N / A for Pkg Type 0 to 70 SN74S244N SNJ54LS240FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 78012012A SNJ54LS 240FK SNJ54LS240J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7801201RA SNJ54LS240J SNJ54LS240W ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7801201SA SNJ54LS240W SNJ54LS241FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54LS 241FK SNJ54LS241J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54LS241J SNJ54LS241W ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54LS241W SNJ54LS244FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54LS 244FK Addendum-Page 4 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) SNJ54LS244J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7705701RA SNJ54LS244J SNJ54LS244W ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 7705701SA SNJ54LS244W SNJ54S240FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S 240FK SNJ54S240J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S240J SNJ54S240W ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S240W SNJ54S241FK ACTIVE LCCC FK 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S 241FK SNJ54S241J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S241J SNJ54S244J ACTIVE CDIP J 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S244J SNJ54S244W ACTIVE CFP W 20 1 Non-RoHS & Green SNPB N / A for Pkg Type -55 to 125 SNJ54S244W (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. Addendum-Page 5 Samples PACKAGE OPTION ADDENDUM www.ti.com 11-Mar-2021 (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. OTHER QUALIFIED VERSIONS OF SN54LS240, SN54LS240-SP, SN54LS241, SN54LS244, SN54LS244-SP, SN54S240, SN54S241, SN54S244, SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 : * Catalog: SN74LS240, SN54LS240, SN74LS241, SN74LS244, SN54LS244, SN74S240, SN74S241, SN74S244 * Military: SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 * Space: SN54LS240-SP, SN54LS244-SP NOTE: Qualified Version Definitions: * Catalog - TI's standard catalog product * Military - QML certified for Military and Defense Applications * Space - Radiation tolerant, ceramic packaging and qualified for use in Space-based application Addendum-Page 6 PACKAGE MATERIALS INFORMATION www.ti.com 30-Dec-2020 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SN74LS240DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74LS240DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74LS240NSR SO NS 20 2000 330.0 24.4 8.4 13.0 2.5 12.0 24.0 Q1 SN74LS241DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74LS241NSR SO NS 20 2000 330.0 24.4 8.4 13.0 2.5 12.0 24.0 Q1 SN74LS244DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74LS244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 SN74LS244NSR SO NS 20 2000 330.0 24.4 8.4 13.0 2.5 12.0 24.0 Q1 SN74S244DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 30-Dec-2020 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74LS240DBR SN74LS240DWR SSOP DB 20 2000 853.0 449.0 35.0 SOIC DW 20 2000 367.0 367.0 45.0 SN74LS240NSR SO NS 20 2000 367.0 367.0 45.0 SN74LS241DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74LS241NSR SO NS 20 2000 367.0 367.0 45.0 SN74LS244DBR SSOP DB 20 2000 853.0 449.0 35.0 SN74LS244DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74LS244NSR SO NS 20 2000 367.0 367.0 45.0 SN74S244DWR SOIC DW 20 2000 367.0 367.0 45.0 Pack Materials-Page 2 PACKAGE OUTLINE DB0020A SSOP - 2 mm max height SCALE 2.000 SMALL OUTLINE PACKAGE C 8.2 TYP 7.4 A 0.1 C PIN 1 INDEX AREA SEATING PLANE 18X 0.65 20 1 2X 7.5 6.9 NOTE 3 5.85 10 11 20X B 5.6 5.0 NOTE 4 SEE DETAIL A (0.15) TYP 0.38 0.22 0.1 C A B 2 MAX 0.25 GAGE PLANE 0 -8 0.95 0.55 0.05 MIN DETAIL A A 15 TYPICAL 4214851/B 08/2019 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side. 5. Reference JEDEC registration MO-150. www.ti.com EXAMPLE BOARD LAYOUT DB0020A SSOP - 2 mm max height SMALL OUTLINE PACKAGE SYMM 20X (1.85) (R0.05) TYP 1 20 20X (0.45) SYMM 18X (0.65) 11 10 (7) LAND PATTERN EXAMPLE EXPOSED METAL SHOWN SCALE: 10X SOLDER MASK OPENING SOLDER MASK OPENING METAL UNDER SOLDER MASK METAL EXPOSED METAL EXPOSED METAL 0.07 MAX ALL AROUND NON-SOLDER MASK DEFINED (PREFERRED) 0.07 MIN ALL AROUND SOLDER MASK DEFINED SOLDER MASK DETAILS 15.000 4214851/B 08/2019 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com EXAMPLE STENCIL DESIGN DB0020A SSOP - 2 mm max height SMALL OUTLINE PACKAGE 20X (1.85) SYMM (R0.05) TYP 1 20 20X (0.45) SYMM 18X (0.65) 10 11 (7) SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL SCALE: 10X 4214851/B 08/2019 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design. www.ti.com PACKAGE OUTLINE DW0020A SOIC - 2.65 mm max height SCALE 1.200 SOIC C 10.63 TYP 9.97 SEATING PLANE PIN 1 ID AREA A 0.1 C 20 1 13.0 12.6 NOTE 3 18X 1.27 2X 11.43 10 11 B 7.6 7.4 NOTE 4 20X 0.51 0.31 0.25 C A B 2.65 MAX 0.33 TYP 0.10 SEE DETAIL A 0.25 GAGE PLANE 0 -8 0.3 0.1 1.27 0.40 DETAIL A TYPICAL 4220724/A 05/2016 NOTES: 1. All linear dimensions are in millimeters. Dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.43 mm per side. 5. Reference JEDEC registration MS-013. www.ti.com EXAMPLE BOARD LAYOUT DW0020A SOIC - 2.65 mm max height SOIC 20X (2) SYMM 1 20 20X (0.6) 18X (1.27) SYMM (R0.05) TYP 10 11 (9.3) LAND PATTERN EXAMPLE SCALE:6X SOLDER MASK OPENING METAL SOLDER MASK OPENING METAL UNDER SOLDER MASK 0.07 MAX ALL AROUND 0.07 MIN ALL AROUND SOLDER MASK DEFINED NON SOLDER MASK DEFINED SOLDER MASK DETAILS 4220724/A 05/2016 NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site. www.ti.com EXAMPLE STENCIL DESIGN DW0020A SOIC - 2.65 mm max height SOIC 20X (2) SYMM 1 20 20X (0.6) 18X (1.27) SYMM 11 10 (9.3) SOLDER PASTE EXAMPLE BASED ON 0.125 mm THICK STENCIL SCALE:6X 4220724/A 05/2016 NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. 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