SDFS099 - MAY 1995 D 3-State Outputs Drive Bus Lines or Buffer D DB OR N PACKAGE (TOP VIEW) Memory Address Registers Package Options Include Plastic Small-Outline (DB) Packages and Plastic 300-mil DIPs (N) DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description The SN74F2245 is designed for asynchronous communication between data buses. The devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input disables the device so the buses are effectively isolated. 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC OE B1 B2 B3 B4 B5 B6 B7 B8 Both A and B outputs can sink up to 12 mA; 25- resistors are included in the lower output circuit to reduce overshoot and undershoot. The SN74F2245 is characterized for operation from 0C to 70C. FUNCTION TABLE INPUTS OE OPERATION DIR L L B data to A bus L H A data to B bus H X Isolation logic symbol OE DIR A1 19 1 2 logic diagram (positive logic) DIR G3 1 3EN1[BA] 3EN2[AB] 19 18 1 B1 A1 OE 2 2 A2 A3 A4 A5 A6 A7 A8 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B2 18 B3 B1 B4 B5 B6 B7 To Seven Other Channels B8 This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 1995, Texas Instruments Incorporated ! " #$%! " &$'(#! )!%* )$#!" # ! "&%##!" &% !+% !%" %," "!$%!" "!)) -!.* )$#! &#%""/ )%" ! %#%""(. #($)% !%"!/ (( &%!%"* * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * 1 SDFS099 - MAY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to 7 V Input voltage range, VI (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . -0.5 V to 5.5 V Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC Current into any output in the low state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to 150C Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed. recommended operating conditions MIN NOM MAX 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IIK Low-level input voltage 0.8 V Input clamp current -18 mA IOH IOL High-level output current -3 mA Low-level output current 12 mA TA Operating free-air temperature 70 C High-level input voltage 2 V V 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH TEST CONDITIONS VCC = 4.5 V, Any output II = - 18 mA IOH = - 1 mA VCC = 4.5 V IOH = - 3 mA IOH = - 1 mA to - 3 mA VCC = 4.75 V, VOL IIH IIL IOS ICC TYP 2.5 3.4 2.4 3.3 UNIT -1.2 V V 2.7 IOL = 1 mA IOL = 12 mA VCC = 5.5 V VI = 5.5 V VI = 7 V VCC = 5.5 V, VI = 2.7 V DIR and OE VCC = 5.5 V, VI = 0.5 V A and B VCC = 5.5 V, VO = 0 Outputs high 62 90 VCC = 5.5 V Outputs low 73 105 Outputs disabled 72 100 DIR and OE 0.2 0.5 0.5 0.75 A and B DIR and OE V 1 0.1 70 20 A and B mA A A -0.5 - 0.5 -50 -120 All typical values are at VCC = 5 V, TA = 25C. For I/O ports, the parameters IIH and IIL include the off-state output current. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. 2 MAX VCC = 4.5 V Any output A and B II MIN * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * mA mA mA SDFS099 - MAY 1995 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B VCC = 5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = 25C MIN TYP MAX VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX MIN MAX 2.5 3.9 5.5 2.1 6.6 3.1 4.6 6.6 2.9 7.1 2.4 4.8 7.3 1.6 8.5 3.6 6.6 10.6 3 12 2.3 4.3 6.3 2 7.5 2 4 5.8 1.9 6.8 UNIT ns ns ns For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * 3 SDFS099 - MAY 1995 PARAMETER MEASUREMENT INFORMATION 7 V (tPZL, tPLZ) S1 Open (all others) From Output Under Test Test Point CL (see Note A) R1 From Output Under Test R1 Test Point CL (see Note A) R2 LOAD CIRCUIT FOR TOTEM-POLE OUTPUTS RL = R1 = R2 LOAD CIRCUIT FOR 3-STATE AND OPEN-COLLECTOR OUTPUTS High-Level Pulse (see Note C) 3V 1.5 V 0V tw 3V Timing Input (see Note C) 3V 1.5 V Low-Level Pulse 0V 1.5 V 1.5 V 0V th tsu Data Input (see Note C) 1.5 V 3V VOLTAGE WAVEFORMS PULSE DURATION 1.5 V 1.5 V 0V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3V Output Control (low-level enable) 3V Input (see Note C) 1.5 V 1.5 V 1.5 V 0V tPZL 1.5 V tPLZ 0V tPLH In-Phase Output (see Note E) tPHL VOH 1.5 V VOL 1.5 V tPHZ 1.5 V 1.5 V 0.3 V tPZH tPLH VOH 3.5 V 1.5 V VOL tPHL Out-of-Phase Output (see Note E) Waveform 1 (see Notes B and E) VOH Waveform 2 (see Notes B and E) VOL 1.5 V 0.3 V 0V VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES (see Note D) VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL includes probe and jig capacitance. B. 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. C. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, tr = tf 2.5 ns, duty cycle = 50%. D. When measuring propagation delay times of 3-state outputs, switch S1 is open. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuit and Voltage Waveforms 4 * POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251-1443 * PACKAGE OPTION ADDENDUM www.ti.com 30-Mar-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type SN74F2245DBR OBSOLETE SSOP DB 20 TBD Call TI Call TI SN74F2245DW OBSOLETE SOIC DW 20 TBD Call TI Call TI SN74F2245DWR OBSOLETE SOIC DW 20 TBD Call TI Call TI SN74F2245N OBSOLETE PDIP N 20 TBD Call TI Call TI Package Drawing Pins Package Eco Plan (2) Qty Lead/Ball Finish MSL Peak Temp (3) (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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. 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. Addendum-Page 1 MECHANICAL DATA MSSO002E - JANUARY 1995 - REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN 0,38 0,22 0,65 28 0,15 M 15 0,25 0,09 8,20 7,40 5,60 5,00 Gage Plane 1 14 0,25 A 0-8 0,95 0,55 Seating Plane 2,00 MAX 0,10 0,05 MIN PINS ** 14 16 20 24 28 30 38 A MAX 6,50 6,50 7,50 8,50 10,50 10,50 12,90 A MIN 5,90 5,90 6,90 7,90 9,90 9,90 12,30 DIM 4040065 /E 12/01 NOTES: A. B. C. D. All linear dimensions are in millimeters. This drawing is subject to change without notice. Body dimensions do not include mold flash or protrusion not to exceed 0,15. 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