SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 * * * * * Independent Registers for A and B Buses Multiplexed Real-Time and Stored Data Choice of True or Inverting Data Paths Choice of 3-State or Open-Collector Outputs Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (NT) and Ceramic (JT) 300-mil DIPs DEVICE OUTPUT LOGIC SN54ALS646, SN74ALS646A, AS646 3 state True SN54ALS648, SN74ALS648A, SN74AS648 3 state Inverting SN54ALS646, SN54ALS648, SN54AS646 . . . JT PACKAGE SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 . . . DW OR NT PACKAGE (TOP VIEW) CLKAB SAB DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description Output-enable (OE) and direction-control (DIR) inputs control the transceiver functions. In the transceiver mode, data present at the highimpedance port may be stored in either or both registers. 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC CLKBA SBA OE B1 B2 B3 B4 B5 B6 B7 B8 DIR SAB CLKAB NC VCC CLKBA SBA SN54ALS646, SN54ALS648, SN54AS646 . . . FK PACKAGE (TOP VIEW) A1 A2 A3 NC A4 A5 A6 5 2 1 28 27 26 25 6 24 7 23 8 22 9 21 10 20 4 3 19 11 12 13 14 15 16 17 18 OE B1 B2 NC B3 B4 B5 A7 A8 GND NC B8 B7 B6 These devices consist of bus-transceiver circuits with 3-state or open-collector outputs, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage 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 octal bus transceivers and registers. 1 The select-control (SAB and SBA) inputs can NC - No internal connection multiplex stored and real-time (transparent mode) data. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. DIR determines which bus receives data when OE is 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. When an output function is disabled, the input function is still enabled and can be used to store and transmit data. Only one of the two buses, A or B, may be driven at a time. The -1 version of the SN74ALS646A is identical to the standard version, except that the recommended maximum IOL in the -1 version is increased to 48 mA. There are no -1 versions of the SN54ALS646, SN54ALS648, or SN74ALS648A. The SN54ALS646, SN54ALS648, and SN54AS646 are characterized for operation over the full military temperature range of - 55C to 125C. The SN74ALS646A, SN74ALS648A, SN74AS646, and SN74AS648 are characterized for operation from 0C to 70C. Copyright 1995, Texas Instruments Incorporated PRODUCTION DATA information is 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 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 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 SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 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 22 SBA X X X STORAGE FROM A, B, OR A AND B 21 OE L L 22 SBA X BUS B 3 DIR L H 1 CLKAB X H or L 23 CLKBA H or L X 2 SAB X H TRANSFER STORED DATA TO A AND/OR B Figure 1. Bus-Management Functions Pin numbers shown are for the DW, JT, and NT packages. 2 2 SAB L 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 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 22 SBA H X SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 Function Tables SN54ALS646, SN54AS646, SN74ALS646A, SN74AS646 INPUTS DATA I/O OE DIR CLKAB CLKBA SAB SBA A1- A8 B1- B8 X X X X X Input Unspecified OPERATION OR FUNCTION X X X X X Unspecified Input Store A, B unspecified Store B, A unspecified 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 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 are always enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs. SN54ALS648, SN74ALS648A, SN74AS648 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 are always enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 3 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 logic symbols SN54ALS648, SN74ALS648A, SN74AS648 SN54ALS646, SN54AS646, SN74ALS646A, SN74AS646 OE DIR CLKBA SBA CLKAB SAB A1 21 3 23 22 1 2 G3 OE 3 EN1 [BA] 3 EN2 [AB] DIR G5 SBA G7 SAB 1 4 A4 A5 A6 A7 A8 4D 5 1 20 B1 A1 5 1 7 1 A3 CLKAB C6 6D A2 CLKBA C4 1 21 3 23 22 1 2 3 EN1 [BA] 3 EN2 [AB] C4 G5 C6 G7 1 4 7 7 1 5 19 6 18 7 17 8 16 9 15 10 14 11 13 B2 B3 A2 A3 B4 A4 B5 A5 B6 A6 B7 A7 B8 A8 POST OFFICE BOX 655303 20 1 2 7 5 19 6 18 7 17 8 16 9 15 10 14 11 13 * DALLAS, TEXAS 75265 B1 5 1 6D 2 4D 5 1 These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the DW, JT, and NT packages. 4 G3 B2 B3 B4 B5 B6 B7 B8 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 logic diagrams (positive logic) OE DIR 21 SN54ALS646, SN54AS646, SN74ALS646A, SN74AS646 3 23 CLKBA SBA 22 CLKAB 1 SAB 2 One of Eight Channels 1D C1 A1 4 20 1D C1 B1 To Seven Other Channels SN54ALS648, SN74ALS648A, SN74AS648 OE DIR 21 3 23 CLKBA SBA 22 CLKAB 1 SAB 2 One of Eight Channels 1D C1 A1 4 20 1D C1 B1 To Seven Other Channels Pin numbers shown are for the DW, JT, and NT packages. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 5 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I / O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74ALS646A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 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. recommended operating conditions SN54ALS646 VCC VIH Supply voltage VIL IOH Low-level input voltage IOL Low level output current Low-level fclock tw Clock frequency tsu th Setup time, A before CLKAB or B before CLKBA High-level input voltage SN74ALS646A MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 High-level output current 2 V - 12 - 15 mA 24 Hold time, A after CLKAB or B after CLKBA POST OFFICE BOX 655303 35 0 40 mA MHz 14.5 12.5 ns 15 10 ns 0 TA Operating free-air temperature - 55 Applies only to the -1 version and only if VCC is maintained between 4.75 V and 5.25 6 V 0.8 48 0 V 0.7 12 Pulse duration, CLKBA or CLKAB high or low UNIT * DALLAS, TEXAS 75265 0 125 0 ns 70 C SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH SN54ALS646 TYP MAX TEST CONDITIONS MIN VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = - 18 mA IOH = - 0.4 mA VCC = 4.5 V IOH = - 3 mA IOH = - 12 mA - 1.2 VCC - 2 2.4 VCC = 4.5 V Control inputs VI = 7 V VI = 5.5 V VCC = 5.5 5 5 V, V VI = 2 2.7 7V 5 5 V, V VCC = 5.5 4V VI = 0 0.4 IO VCC = 5.5 V, VO = 2.25 V ICC VCC = 5.5 V A or B ports 3.2 Control inputs IIH A or B ports Control inputs IIL A or B ports 3.2 UNIT V V 2 0.25 0.4 IOL = 24 mA IOL = 48 mA VCC = 5 5.5 5V II - 1.2 VCC - 2 2.4 2 IOH = - 15 mA IOL = 12 mA VOL SN74ALS646A TYP MAX MIN - 20 0.25 0.4 0.35 0.5 0.35 0.5 0.1 0.1 0.1 0.1 20 20 20 20 - 0.2 - 0.2 - 0.2 - 0.2 - 112 - 30 - 112 Outputs high 47 76 47 76 Outputs low 55 88 55 88 Outputs disabled 55 88 55 88 V mA A A mA mA mA All typical values are at VCC = 5 V, TA = 25C. Applies only to the -1 version and only if VCC is maintained between 4.75 V and 5.25 For I/O ports, the parameters IIH and IIL include the off-state output current. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 7 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 switching characteristics (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54ALS646 MIN fmax tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ SN74ALS646A MAX 35 CLKBA or CLKAB A or B A or B B or A SBA or SAB (stored data low) A or B SBA or SAB (stored data high) A or B OE A or B OE A or B DIR A or B POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 MIN MAX 40 MHz 10 35 7 30 5 20 5 17 5 22 3 20 3 15 3 12 10 40 7 35 5 23 5 20 8 30 6 25 5 24 5 20 3 20 2 17 5 22 4 20 1 12 1 10 1 20 2 16 5 38 3 30 5 30 4 25 1 10 2 16 1 12 DIR A or B tPLZ 2 21 For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. These parameters are measured with the internal output state of the storage register opposite that of the bus input. 8 UNIT ns ns ns ns ns ns ns ns SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I / O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS648 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74ALS648A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 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. recommended operating conditions SN54ALS648 VCC VIH Supply voltage VIL IOH Low-level input voltage IOL fclock Low-level output current tw tsu Pulse duration, CLKBA or CLKAB high or low th TA Hold time, A after CLKAB or B after CLKBA High-level input voltage SN74ALS648A MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 High-level output current 2 0 Setup time, A before CLKAB or B before CLKBA Operating free-air temperature V 0.8 V - 12 - 15 mA 35 0 24 mA 40 MHz 14.5 12.5 ns 15 10 ns 0 0 ns - 55 POST OFFICE BOX 655303 V 0.7 12 Clock frequency UNIT * DALLAS, TEXAS 75265 125 0 70 C 9 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II A or B ports MIN VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = - 18 mA IOH = - 0.4 mA VCC = 4.5 V IOH = - 3 mA IOH = - 12 mA VCC = 4 4.5 5V Control inputs SN54ALS648 TYP MAX TEST CONDITIONS 5V VCC = 5 5.5 - 1.2 VCC - 2 2.4 A or B ports IO ICC A or B ports IOH = - 15 mA IOL = 12 mA 0.4 0.25 0.4 0.35 0.5 0.1 0.1 0.1 0.1 20 20 20 20 - 0.2 - 0.2 - 0.2 - 0.2 VCC = 5.5 5 5 V, V VI = 0 0.4 4V VCC = 5.5 V, VO = 2.25 V V 2 0.25 VI = 5.5 V VI = 2 2.7 7V UNIT V IOL = 24 mA VI = 7 V VCC = 5.5 5 5 V, V VCC = 5.5 V 3.2 2 Control inputs IIL - 1.2 VCC - 2 2.4 3.2 Control inputs IIH SN74ALS648A TYP MAX MIN - 20 - 112 - 30 - 112 Outputs high 47 76 47 76 Outputs low 57 88 57 88 Outputs disabled 57 88 57 88 V mA A A mA mA mA 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. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 10 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 switching characteristics (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54ALS648 MIN fmax tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ SN74ALS648A MAX 35 CLKBA or CLKAB A or B A or B B or A SBA or SAB (stored data low) A or B SBA or SAB (stored data high) A or B OE A or B OE A or B DIR A or B * DALLAS, TEXAS 75265 MIN MAX 40 MHz 8 39 7 33 5 23 5 20 3 20 2 17 2 12 2 10 5 44 5 39 4 26 4 22 6 30 6 25 6 25 6 21 4 25 2 22 4 25 4 22 1 12 1 10 2 21 2 15 4 35 2 27 3 25 3 19 1 14 2 15 1 17 DIR A or B tPLZ 2 22 For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. These parameters are measured with the internal output state of the storage register opposite that of the bus input. POST OFFICE BOX 655303 UNIT ns ns ns ns ns ns ns ns 11 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I / O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54AS646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74AS646 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 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. recommended operating conditions SN54AS646 SN74AS646 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IOH Low-level input voltage 0.8 0.8 V High-level output current -12 -15 mA IOL fclock* Low-level output current tw* Pulse duration tsu* th* High-level input voltage 2 2 32 Clock frequency 0 75 0 CLKBA or CLKAB high 6 5 CLKBA or CLKAB low 7 6 Setup time, A before CLKAB or B before CLKBA 7 6 Hold time, A after CLKAB or B before CLKBA 0 0 V 48 mA 90 MHz TA Operating free-air temperature - 55 125 0 70 * On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested. 12 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 V ns ns ns C SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = - 18 mA IOH = - 2 mA VCC = 4.5 V IOH = - 3 mA IOH = - 12 mA VCC = 4 4.5 5V Control inputs A or B ports SN54AS646 TYP MAX TEST CONDITIONS VCC = 5.5 V, VCC = 5.5 V, MIN - 1.2 VCC - 2 2.4 A or B ports IO ICC A or B ports IOH = - 15 mA IOL = 32 mA 0.5 0.1 0.1 0.1 0.1 20 20 70 70 VCC = 5.5 55V V, VI = 0 0.4 4V VCC = 5.5 V, VO = 2.25 V V 2 0.25 VI = 5.5 V VI = 2 2.7 7V UNIT V IOL = 48 mA VI = 7 V VCC = 5.5 55V V, VCC = 5.5 V 3.2 2 0.35 Control input IIL - 1.2 VCC - 2 2.4 3.2 Control inputs IIH SN74AS646 TYP MAX MIN - 30 0.5 - 0.5 - 0.5 - 0.75 - 0.75 - 112 - 30 - 112 Outputs high 120 195 120 195 Outputs low 130 211 130 211 Outputs disabled 130 211 130 211 V mA A A mA mA mA All typical values are at VCC = 5 V, TA = 25 C. For I/O ports, the parameters IIH and IIL include the off-state output current. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 13 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 switching characteristics (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54AS646 MIN fmax* tPLH tPHL tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ MAX 75 CLKBA or CLKAB A or B A or B B or A SBA or SAB A or B OE A or B OE A or B DIR A or B UNIT SN74AS646 MIN MAX 90 MHz 2 9.5 2 8.5 2 10 2 9 2 11.5 2 9 1 8 1 7 2 13.5 2 11 2 11 2 9 2 11 2 9 3 15 3 14 2 11 2 9 2 11 2 9 3 21 3 16 3 24 3 18 2 12 2 10 DIR A or B tPLZ 2 12 2 10 * On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested. For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. These parameters are measured with the internal output state of the storage register opposite that of the bus input. 14 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 ns ns ns ns ns ns ns SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I / O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN74AS648 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 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. recommended operating conditions SN74AS648 MIN NOM MAX 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IOH Low-level input voltage 0.8 V High-level output current -15 mA IOL fclock Low-level output current tw Pulse duration tsu th Setup time, A before CLKAB or B before CLKBA 6 Hold time, A after CLKAB or B before CLKBA 0 TA Operating free-air temperature 0 High-level input voltage 2 Clock frequency V 0 CLKBA or CLKAB high 5 CLKBA or CLKAB low 6 V 48 mA 90 MHz ns ns ns 70 C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = - 18 mA IOH = - 2 mA VCC = 4 4.5 5V IOH = - 3 mA IOH = - 15 mA VCC = 4.5 V, Control inputs A or B ports VCC = 5 5.5 5V SN74AS648 TYP MAX MIN - 1.2 VCC - 2 2.4 2 IOL = 48 mA VI = 7 V 0.35 0.1 20 VI = 2 2.7 7V 55V VCC = 5.5 V, 4V VI = 0 0.4 IO VCC = 5.5 V, VO = 2.25 V ICC VCC = 5.5 V 70 Control input IIL A or B ports 0.5 0.1 VI = 5.5 V VCC = 5.5 55V V, A or B ports V V 3.2 Control inputs IIH UNIT V mA A A - 0.5 - 0.75 - 30 - 112 Outputs high 110 185 Outputs low 120 195 Outputs disabled 120 195 mA mA mA All typical values are at VCC = 5 V, TA = 25 C. For I/O ports, the parameters IIH and IIL include the off-state output current. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 15 SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 switching characteristics (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX UNIT SN74AS648 MIN fmax tPLH tPHL tPLH tPHL tPLH tPHL tPZH MAX 90 CLKBA or CLKAB A or B A or B B or A SBA or SAB A or B OE A or B OE A or B DIR A or B MHz 2 8.5 2 9 2 8 1 7 2 11 2 9 2 9 3 15 2 9 2 9 3 16 3 18 2 DIR A or B tPLZ 2 For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. These parameters are measured with the internal output state of the storage register opposite that of the bus input. 10 tPZL tPHZ tPLZ tPZH tPZL tPHZ 16 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 10 ns ns ns ns ns ns ns SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F - DECEMBER 1983 - REVISED JANUARY 1995 PARAMETER MEASUREMENT INFORMATION 7V VCC SWITCH POSITION TABLE Open S1 R1 = 500 From Output Under Test CL = 50 pF (see Note A) Test Point R2 = 500 TEST S1 tPLH tPHL Open Open tPZH tPZL Open Closed tPHZ tPLZ Open RL From Output Under Test Test Point CL = 50 pF (see Note A) Closed LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V 3.5 V Timing Input 1.3 V High-Level Pulse 0.3 V tw 0.3 V th tsu Data Input 1.3 V 1.3 V 3.5 V 1.3 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 1.3 V 0.3 V 0.3 V VOLTAGE WAVEFORMS PULSE DURATION VOLTAGE WAVEFORMS SETUP AND HOLD TIMES 3.5 V Output Control 1.3 V 1.3 V 0.3 V 3.5 V Input 1.3 V tPZL 1.3 V tPLZ 0.3 V In-Phase Output VOH 1.3 V VOL 1.3 V Waveform 1 S1 Closed (see Note B) VOH 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES 1.3 V tPHZ tPLH tPHL Out-of-Phase Output 3.5 V tPHL tPLH tPZH Waveform 2 S1 Open (see Note B) VOL 0.3 V VOH 1.3 V 0.3 V 0V 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, ZO = 50 , tr 2 ns, tf 2 ns. D. The outputs are measured one at a time with one transition per measurement. Figure 2. Load Circuits and Voltage Waveforms POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 17 PACKAGE OPTION ADDENDUM www.ti.com 17-Aug-2012 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp Samples (Requires Login) 5962-87595013A ACTIVE LCCC FK 28 1 TBD Call TI Call TI 5962-8759501KA ACTIVE CFP W 24 1 TBD Call TI Call TI 5962-8759501LA ACTIVE CDIP JT 24 1 TBD Call TI Call TI 5962-89956013A ACTIVE LCCC FK 28 1 TBD Call TI Call TI 5962-8995601LA ACTIVE CDIP JT 24 1 TBD Call TI Call TI 5962-9052301LA ACTIVE CDIP JT 24 1 TBD Call TI Call TI SN54AS646JT ACTIVE CDIP JT 24 1 TBD A42 SN74ALS646A-1DW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646A-1DWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646A-1DWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646A-1DWR ACTIVE SOIC DW 24 TBD Call TI Call TI N / A for Pkg Type SN74ALS646A-1DWRE4 ACTIVE SOIC DW 24 TBD Call TI Call TI SN74ALS646A-1DWRG4 ACTIVE SOIC DW 24 TBD Call TI Call TI SN74ALS646A-1NT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74ALS646A-1NTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74ALS646ADW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ADWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ADWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ADWR ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ADWRE4 ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ADWRG4 ACTIVE SOIC DW 24 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS646ANT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74ALS646ANTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type Addendum-Page 1 (3) PACKAGE OPTION ADDENDUM www.ti.com Orderable Device 17-Aug-2012 Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS648ADWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS648ADWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74ALS648ANT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74ALS648ANTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74AS646DW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74AS646DWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74AS646DWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74AS646NT ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74AS646NTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SN74AS648DW ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74AS648DWE4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM SN74AS648DWG4 ACTIVE SOIC DW 24 25 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM 15 Pb-Free (RoHS) SN74AS648NT ACTIVE PDIP NT 24 SN74AS648NT3 OBSOLETE PDIP NT 24 CU NIPDAU N / A for Pkg Type SN74AS648NTE4 ACTIVE PDIP NT 24 15 Pb-Free (RoHS) CU NIPDAU N / A for Pkg Type SNJ54ALS646FK ACTIVE LCCC FK 28 1 TBD POST-PLATE N / A for Pkg Type SNJ54ALS646JT ACTIVE CDIP JT 24 1 TBD A42 Call TI Call TI N / A for Pkg Type SNJ54ALS646W OBSOLETE CFP W 24 TBD Call TI Call TI SNJ54ALS648FK OBSOLETE LCCC FK 24 TBD Call TI Call TI SNJ54ALS648JT ACTIVE CDIP JT 24 TBD A42 SNJ54ALS648W OBSOLETE CFP W 24 SNJ54AS646FK ACTIVE LCCC FK 28 1 TBD SNJ54AS646JT ACTIVE CDIP JT 24 1 TBD 1 TBD Addendum-Page 2 Call TI N / A for Pkg Type Call TI POST-PLATE N / A for Pkg Type A42 Samples (Requires Login) SN74ALS648ADW TBD (3) N / A for Pkg Type PACKAGE OPTION ADDENDUM www.ti.com Orderable Device SNJ54AS646W 17-Aug-2012 Status (1) Package Type Package Drawing ACTIVE CFP W Pins 24 Package Qty Eco Plan 1 TBD (2) Lead/ Ball Finish A42 MSL Peak Temp (3) Samples (Requires Login) 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. 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 SN54ALS646, SN54ALS648, SN54AS646, SN74AS646 : * Catalog: SN74ALS646, SN74ALS648, SN74AS646 * Military: SN54AS646 NOTE: Qualified Version Definitions: * Catalog - TI's standard catalog product Addendum-Page 3 PACKAGE OPTION ADDENDUM www.ti.com 17-Aug-2012 * Military - QML certified for Military and Defense Applications Addendum-Page 4 PACKAGE MATERIALS INFORMATION www.ti.com 17-Aug-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device SN74ALS646ADWR 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 17-Aug-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74ALS646ADWR SOIC DW 24 2000 367.0 367.0 45.0 Pack Materials-Page 2 MECHANICAL DATA MCER004A - JANUARY 1995 - REVISED JANUARY 1997 JT (R-GDIP-T**) CERAMIC DUAL-IN-LINE 24 LEADS SHOWN PINS ** A 13 24 B 1 24 28 A MAX 1.280 (32,51) 1.460 (37,08) A MIN 1.240 (31,50) 1.440 (36,58) B MAX 0.300 (7,62) 0.291 (7,39) B MIN 0.245 (6,22) 0.285 (7,24) DIM 12 0.070 (1,78) 0.030 (0,76) 0.100 (2,54) MAX 0.320 (8,13) 0.290 (7,37) 0.015 (0,38) MIN 0.200 (5,08) MAX Seating Plane 0.130 (3,30) MIN 0.023 (0,58) 0.015 (0,38) 0-15 0.014 (0,36) 0.008 (0,20) 0.100 (2,54) 4040110/C 08/96 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. This package can be hermetically sealed with a ceramic lid using glass frit. Index point is provided on cap for terminal identification. Falls within MIL STD 1835 GDIP3-T24, GDIP4-T28, and JEDEC MO-058 AA, MO-058 AB POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 MECHANICAL DATA MCFP007 - OCTOBER 1994 W (R-GDFP-F24) CERAMIC DUAL FLATPACK 0.375 (9,53) 0.340 (8,64) Base and Seating Plane 0.006 (0,15) 0.004 (0,10) 0.090 (2,29) 0.045 (1,14) 0.045 (1,14) 0.026 (0,66) 0.395 (10,03) 0.360 (9,14) 0.360 (9,14) 0.240 (6,10) 1 0.360 (9,14) 0.240 (6,10) 24 0.019 (0,48) 0.015 (0,38) 0.050 (1,27) 0.640 (16,26) 0.490 (12,45) 0.030 (0,76) 0.015 (0,38) 12 13 30 TYP 1.115 (28,32) 0.840 (21,34) 4040180-5 / B 03/95 NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. This package can be hermetically sealed with a ceramic lid using glass frit. Falls within MIL-STD-1835 GDFP2-F24 and JEDEC MO-070AD Index point is provided on cap for terminal identification only. POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 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. All semiconductor products (also referred to herein as "components") are sold subject to TI's terms and conditions of sale supplied at the time of order acknowledgment. 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