SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 • • • Bidirectional Bus Transceivers in High-Density 20-Pin Packages True Logic 3-State Outputs Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs SN54ALS645A, SN54AS645 . . . J PACKAGE SN74ALS645A, SN74AS645 . . . DW OR N PACKAGE (TOP VIEW) DIR A1 A2 A3 A4 A5 A6 A7 A8 GND description These octal bus transceivers are designed for asynchronous two-way communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus, depending on the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that 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 A2 A1 DIR VCC SN54ALS645A, SN54AS645 . . . FK PACKAGE (TOP VIEW) The -1 version of the SN74ALS645A is identical to the standard version, except that the recommended maximum IOL is increased to 48 mA. There is no -1 version of the SN54ALS645A. A3 A4 A5 A6 A7 The SN54ALS645A and SN54AS645 are characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74ALS645A and SN74AS645 are characterized for operation from 0°C to 70°C. OE • 4 3 2 1 20 19 18 5 17 6 16 7 15 14 8 B1 B2 B3 B4 B5 A8 GND B8 B7 B6 9 10 11 12 13 FUNCTION TABLE INPUTS OPERATION OE DIR L L B data to A bus L H A data to B bus H X Isolation 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 SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 logic symbol† OE DIR A1 logic diagram (positive logic) 19 1 OE G3 19 3 EN1 [BA] 3 EN2 [AB] 2 18 1 DIR 1 B1 2 A2 A3 A4 A5 A6 A7 A8 3 17 4 16 5 15 6 14 7 13 8 12 9 11 B2 A1 B3 2 18 B1 B4 B5 B6 B7 To Seven Other Transceivers B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS645A . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74ALS645A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C ‡ 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 SN54ALS645A VCC VIH Supply voltage VIL IOH Low-level input voltage IOL Low level output current Low-level High-level input voltage MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 High-level output current TA Operating free-air temperature § Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V 2 SN74ALS645A POST OFFICE BOX 655303 – 55 • DALLAS, TEXAS 75265 2 UNIT V V 0.7 0.8 V – 12 – 15 mA 12 24 48§ mA 70 °C 125 0 SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH SN54ALS645A 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 – 1.5 VCC – 2 2.4 II VCC = 4.5 V Control inputs A or B ports VCC = 5 5.5 5V VI = 7 V VI = 5.5 V Control inputs A or B ports§ VCC = 5 5.5 5V V, VI = 2 2.7 7V IIL Control inputs A or B ports§ 5V VCC = 5 5.5 V, 4V VI = 0 0.4 VCC = 5.5 V, VO = 2.25 V Outputs high ICC 3.2 3.2 VCC = 5.5 V UNIT V V 2 0.25 0.4 IOL = 24 mA IOL = 48 mA‡ IIH IO¶ – 1.5 VCC – 2 2.4 2 IOH = – 15 mA IOL = 12 mA VOL SN74ALS645A TYP† MAX MIN – 20 Outputs low 0.25 0.4 0.35 0.5 0.35 0.5 0.1 0.1 0.1 0.1 20 20 20 20 – 0.1 – 0.1 – 0.1 – 0.1 – 112 – 30 – 112 30 48 30 45 36 60 36 55 V mA µA mA mA mA Outputs disabled 38 63 38 58 † All typical values are at VCC = 5 V, TA = 25°C. ‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V § 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. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX# SN54ALS645A tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B UNIT SN74ALS645A MIN MAX MIN MAX 1 19 3 10 1 14 3 10 2 30 5 20 2 29 5 20 2 14 2 10 2 30 4 15 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 3 SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: All inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54AS645 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74AS645 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C † 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 SN54AS645 SN74AS645 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 TA Low-level output current 48 64 mA 70 °C High-level input voltage 2 Operating free-air temperature 2 – 55 125 V V 0 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 = – 2 mA VCC = 4.5 V IOH = – 3 mA IOH = – 12 mA VCC = 4 4.5 5V Control inputs SN54AS645 TYP‡ MAX TEST CONDITIONS VCC = 5 5.5 5V SN74AS645 TYP‡ MAX MIN – 1.2 VCC – 2 2.4 – 1.2 VCC – 2 2.4 3.2 3.2 V V 2.4 IOH = – 15 mA IOL = 48 mA UNIT 2.4 0.3 0.55 IOL = 64 mA VI = 7 V 0.35 0.55 0.1 0.1 VI = 5.5 V 0.1 0.1 20 20 70 70 – 0.5 – 0.5 – 0.75 – 0.75 IIH Control inputs A or B ports§ 5V VCC = 5 5.5 V, 7V VI = 2 2.7 IIL Control inputs A or B ports§ VCC = 5 5.5 5V V, VI = 0 0.4 4V IO¶ VCC = 5.5 V, VO = 2.25 V Outputs high 62 97 62 97 ICC VCC = 5.5 V Outputs low 95 149 95 149 Outputs disabled 79 123 79 123 – 50 – 150 – 50 – 150 V mA µA 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. 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† SN54AS645 tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B UNIT SN74AS645 MIN MAX MIN MAX 2 11 2 9.5 2 10.5 2 9 2 12 2 11 2 12 2 10 2 8 2 7 2 13 2 12 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 5 SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.5 V Timing Input Test Point LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 1.3 V 1.3 V 0.3 V 0.3 V Data Input tw th tsu 3.5 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 0.3 V 1.3 V 0.3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 3.5 V Output Control (low-level enabling) 1.3 V 1.3 V 0.3 V tPZL Waveform 1 S1 Closed (see Note B) tPLZ [3.5 V 1.3 V tPHZ tPZH Waveform 2 S1 Open (see Note B) 1.3 V VOL 0.3 V VOH 1.3 V 0.3 V [0 V 3.5 V 1.3 V Input 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output 1.3 V 1.3 V VOL tPLH tPHL VOH Out-of-Phase Output (see Note C) 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES 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. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuits and Voltage Waveforms 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty Lead/Ball Finish MSL Peak Temp (3) 84033012A ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC 8403301RA ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC 8403301SA ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC SN54ALS645AJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SN54AS645J ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SN74ALS645A-1DW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS645A-1DWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS645A-1N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SN74ALS645A-1N3 OBSOLETE PDIP N 20 None Call TI SN74ALS645A-1NSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74ALS645ADW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS645ADWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74ALS645AN ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC Call TI SN74ALS645AN3 OBSOLETE PDIP N 20 None Call TI SN74ALS645ANSR ACTIVE SO NS 20 2000 Pb-Free (RoHS) CU NIPDAU Call TI Level-2-260C-1 YEAR/ Level-1-235C-UNLIM SN74AS645DW ACTIVE SOIC DW 20 25 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74AS645DWR ACTIVE SOIC DW 20 2000 Pb-Free (RoHS) CU NIPDAU Level-2-250C-1 YEAR/ Level-1-235C-UNLIM SN74AS645N ACTIVE PDIP N 20 20 Pb-Free (RoHS) CU NIPDAU Level-NC-NC-NC SNJ54ALS645AFK ACTIVE LCCC FK 20 1 None Call TI Level-NC-NC-NC SNJ54ALS645AJ ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SNJ54ALS645AW ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC SNJ54AS645FK OBSOLETE LCCC FK 20 None Call TI Call TI SNJ54AS645J ACTIVE CDIP J 20 1 None Call TI Level-NC-NC-NC SNJ54AS645W ACTIVE CFP W 20 1 None Call TI Level-NC-NC-NC (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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. None: Not yet available Lead (Pb-Free). 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 Addendum-Page 1 PACKAGE OPTION ADDENDUM www.ti.com 28-Feb-2005 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" and in addition, uses package materials that do not contain halogens, including bromine (Br) or antimony (Sb) above 0.1% of total product weight. (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry 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. 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