SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 D D D D D D D Wide Operating Voltage Range of 2 V to 6 V High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads Low Power Consumption, 80-A Max ICC Typical tpd = 11 ns 6-mA Output Drive at 5 V Low Input Current of 1 A Max Independent Registers for A and B Buses Multiplexed Real-Time and Stored Data True Data Paths SN54HC646 . . . JT OR W PACKAGE SN74HC646 . . . DW OR NT PACKAGE (TOP VIEW) 24 2 23 3 22 4 21 5 20 6 19 7 8 9 18 17 16 10 15 11 14 12 13 DIR SAB CLKAB NC VCC CLKBA SBA 1 VCC CLKBA SBA OE B1 B2 B3 B4 B5 B6 B7 B8 A1 A2 A3 NC A4 A5 A6 5 4 2 1 28 27 26 25 6 24 7 23 8 22 9 21 10 20 11 3 19 12 13 14 15 16 17 18 A7 A8 GND NC B8 CLKAB SAB DIR A1 A2 A3 A4 A5 A6 A7 A8 GND SN54HC646 . . . FK PACKAGE (TOP VIEW) OE B1 B2 NC B3 B4 B5 B7 B6 D D NC - No internal connection description/ordering information The 'HC646 devices consist of bus-transceiver circuits with 3-state outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the input bus or from the internal registers. Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the 'HC646 devices. Output-enable (OE) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the high-impedance port may be stored in either or both registers. The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data. DIR determines which bus receives data when OE is active (low). In the isolation mode (OE high), A data may be stored in one register and /or B data may be stored in the other register. ORDERING INFORMATION PDIP - NT -40C to 85C -55C to 125C ORDERABLE PART NUMBER PACKAGE TA TOP-SIDE MARKING Tube SN74HC646NT Tube SN74HC646DW Tape and reel SN74HC646DWR CDIP - JT Tube SNJ54HC646JT SNJ54HC646JT CFP - W Tube SNJ54HC646W SNJ54HC646W SOIC - DW SN74HC646NT HC646 LCCC - FK Tube SNJ54HC646FK SNJ54HC646FK Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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 2003, Texas Instruments Incorporated UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 1 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 description/ordering information (continued) To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. When an output function is disabled, the input function is still enabled and can be used to store data. Only one of the two buses, A or B, may be driven at a time. FUNCTION TABLE INPUTS DATA I/O OPERATION OR FUNCTION OE DIR CLKAB CLKBA SAB SBA A1- A8 B1- B8 X X X X X Input Unspecified X X X X X Unspecified Input H X X X Input Input Store A and B data H X H or L H or L X X Input disabled Input disabled Isolation, hold storage L L X X X L Output Input Real-time B data to A bus L L X H or L X H Output Input Stored B data to A bus L H X X L X Input Output Real-time A data to B bus Store A, B unspecified Store B, A unspecified L H H or L X H X Input Output Stored A data to B bus The data-output functions can be enabled or disabled by various signals at OE and DIR. Data-input functions always are enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs. 2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS 21 OE L 3 DIR L 1 23 CLKAB CLKBA X X 2 SAB X BUS B BUS A BUS A BUS B SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 22 SBA L 21 OE L 3 DIR H 3 DIR X X X 1 23 CLKAB CLKBA X X 2 SAB X X X 2 SAB L 22 SBA X BUS B BUS A BUS A 21 OE X X H 23 CLKBA X REAL-TIME TRANSFER BUS A TO BUS B BUS B REAL-TIME TRANSFER BUS B TO BUS A 1 CLKAB X 22 SBA X X X STORAGE FROM A, B, OR A AND B 21 OE L L 3 DIR L H 1 CLKAB X H or L 23 CLKBA H or L X 2 SAB X H 22 SBA H X TRANSFER STORED DATA TO A AND/OR B Pin numbers shown are for the DW, JT, NT, and W packages. Figure 1. Bus-Management Functions POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 logic diagram (positive logic) OE DIR CLKBA SBA CLKAB SAB 21 3 23 22 1 2 One of Eight Channels 1D C1 A1 4 20 B1 1D C1 To Seven Other Channels Pin numbers shown are for the DW, JT, NT, and W packages. absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 mA Package thermal impedance, JA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46C/W (see Note 3): NT package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67C/W 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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. 3. The package thermal impedance is calculated in accordance with JESD 51-3. 4 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 recommended operating conditions (see Note 4) SN54HC646 VCC VIH Supply voltage VCC = 2 V VCC = 4.5 V High-level input voltage VCC = 6 V VCC = 2 V VIL VI VO tt Low-level input voltage NOM MAX 2 5 6 MAX 2 5 6 3.15 3.15 4.2 4.2 0 UNIT V V 0.5 0.5 1.35 1.35 1.8 1.8 VCC VCC VCC = 2 V VCC = 4.5 V Input transition (rise and fall) time NOM 1.5 0 Output voltage MIN 1.5 VCC = 4.5 V VCC = 6 V Input voltage SN74HC646 MIN 0 VCC VCC 0 1000 1000 500 500 V V V ns VCC = 6 V 400 400 TA Operating free-air temperature -55 125 -40 85 C NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VOH TEST CONDITIONS IOZ ICC Ci A or B SN54HC646 MIN MAX SN74HC646 MIN MAX UNIT 2V 1.9 1.998 1.9 1.9 4.4 4.499 4.4 4.4 6V 5.9 5.999 5.9 5.9 IOH = -6 mA IOH = -7.8 mA 4.5 V 3.98 4.3 3.7 3.84 6V 5.48 5.8 5.2 5.34 2V 0.002 0.1 0.1 0.1 IOL = 20 A 4.5 V 0.001 0.1 0.1 0.1 6V 0.001 0.1 0.1 0.1 4.5 V 0.17 0.26 0.4 0.33 6V 0.15 0.26 0.4 0.33 VI = VCC or 0 6V 0.1 100 1000 1000 nA VO = VCC or 0 VI = VCC or 0, 6V 0.01 0.5 10 5 A 8 160 80 A 10 10 10 pF IOL = 6 mA IOL = 7.8 mA II TA = 25C TYP MAX 4.5 V VI = VIH or VIL Control inputs MIN IOH = -20 A VI = VIH or VIL VOL VCC IO = 0 Control inputs 6V 2 V to 6 V 3 V V PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 timing requirements over recommended operating free-air temperature range (unless otherwise noted) VCC fclock tw tsu th Clock frequency Pulse duration, CLKBA or CLKAB high or low Setup time, A before CLKAB or B before CLKBA Hold time, A after CLKAB or B after CLKBA TA = 25C MIN MAX POST OFFICE BOX 655303 MIN MAX SN74HC646 MIN MAX 2V 6 4.3 5.5 4.5 V 31 22 27 6V 36 25 31 2V 80 115 95 4.5 V 16 23 19 6V 14 20 16 2V 100 150 125 4.5 V 20 30 25 6V 17 26 21 2V 5 5 5 4.5 V 5 5 5 6V 5 5 5 PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 6 SN54HC646 * DALLAS, TEXAS 75265 UNIT MHz ns ns ns SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) fmax CLKBA or CLKAB tpd A or B SBA or SAB ten tdis ten tdis OE OE DIR DIR tt A or B B or A A or B A or B A or B A or B A or B Any VCC MIN TA = 25C TYP MAX SN54HC646 MIN MAX SN74HC646 MIN 2V 6 11 4.4 5.5 4.5 V 31 54 22 27 6V 36 64 25 31 MAX UNIT MHz 2V 65 180 270 225 4.5 V 18 36 54 45 6V 14 31 46 38 2V 50 135 205 170 4.5 V 14 27 41 34 6V 11 23 35 29 2V 70 190 285 240 4.5 V 20 38 57 48 6V 16 32 48 41 2V 85 245 370 305 4.5 V 25 49 74 61 6V 20 42 63 52 2V 85 245 370 305 4.5 V 25 49 74 61 6V 20 42 63 52 2V 80 245 370 305 4.5 V 25 49 74 61 6V 20 42 63 52 2V 80 245 370 305 4.5 V 25 49 74 61 6V 20 42 63 52 2V 28 60 90 75 4.5 V 8 12 18 15 6V 6 10 15 13 ns ns ns ns ns ns These parameters are measured with the internal output state of the storage register opposite that of the bus input. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 7 SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 2) PARAMETER tpd TA = 25C TYP MAX SN54HC646 SN74HC646 FROM (INPUT) TO (OUTPUT) VCC 2V 90 265 400 330 CLKBA or CLKAB A or B 4.5 V 24 53 80 66 6V 20 46 68 57 A or B B or A SBA or SAB A or B OE A or B ten DIR A or B tt Any MIN MIN MAX MIN MAX 2V 70 220 335 280 4.5 V 20 44 67 56 6V 15 38 57 49 2V 80 275 415 345 4.5 V 24 55 83 69 6V 20 47 70 60 2V 113 330 500 410 4.5 V 33 66 100 82 6V 27 57 85 71 2V 113 330 500 410 4.5 V 33 66 100 82 6V 27 57 85 71 2V 45 210 315 265 4.5 V 17 42 63 53 6V 13 36 53 These parameters are measured with the internal output state of the storage register opposite that of the bus input. UNIT ns ns ns 43 operating characteristics, TA = 25C PARAMETER Cpd TEST CONDITIONS Power dissipation capacitance No load PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 8 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 TYP 50 UNIT pF SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150C - DECEMBER 1982 - REVISED MARCH 2003 PARAMETER MEASUREMENT INFORMATION VCC From Output Under Test CL (see Note A) PARAMETER S1 Test Point tPZH ten RL 1 k tPZL tPHZ tdis S2 RL 1 k Data Input VCC 50% 10% 50% 50% 0V In-Phase Output 50% 10% tPHL 90% 90% tr tPHL Out-ofPhase Output 90% tf Closed Closed Open Open Open VCC th 90% 90% VCC 50% 10% 0 V tf 50% 10% Output Control (Low-Level Enabling) VCC 50% 50% 0V tPZL VOH 50% 10% V OL tf Output Waveform 1 (See Note B) tPLZ 90% VOH VOL Output Waveform 2 (See Note B) VCC VCC 50% 10% tPZH tPLH 50% 10% Open VOLTAGE WAVEFORMS SETUP AND HOLD AND INPUT RISE AND FALL TIMES VCC tPLH Open tr VOLTAGE WAVEFORMS PULSE DURATIONS 50% Closed 0V 0V Input Closed tsu 0V 50% Open 50% 50% tw Low-Level Pulse 50 pF or 150 pF 50 pF or 150 pF -- Reference Input VCC S2 50 pF LOAD CIRCUIT 50% S1 tPLZ tpd or tt High-Level Pulse CL VOL tPHZ 50% 90% VOH 0 V tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS NOTES: A. CL includes probe and test-fixture 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. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO = 50 , tr = 6 ns, tf = 6 ns. D. For clock inputs, fmax is measured when the input duty cycle is 50%. E. The outputs are measured one at a time with one input transition per measurement. F. tPLZ and tPHZ are the same as tdis. G. tPZL and tPZH are the same as ten. H. tPLH and tPHL are the same as tpd. Figure 2. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 9 PACKAGE OPTION ADDENDUM www.ti.com 18-Sep-2008 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty SN74HC646DW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646DWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646DWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646DWR ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646DWRE4 ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646DWRG4 ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74HC646NT ACTIVE PDIP NT 24 CU NIPDAU N / A for Pkg Type SN74HC646NT3 OBSOLETE PDIP NT 24 SN74HC646NTE4 ACTIVE PDIP NT 24 Lead/Ball Finish 15 Pb-Free (RoHS) TBD Call TI 15 Pb-Free (RoHS) CU NIPDAU MSL Peak Temp (3) Call TI N / A for Pkg Type (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), Pb-Free (RoHS Exempt), 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. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. 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. 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Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74HC646DWR Package Package Pins Type Drawing SOIC DW 24 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 2000 330.0 24.4 Pack Materials-Page 1 10.75 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 15.7 2.7 12.0 24.0 Q1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74HC646DWR SOIC DW 24 2000 367.0 367.0 45.0 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. 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