SN54LS640 THRU SN54LS642, SN54LS644, SN54LS645 SN74LS640 THRU SN74LS642, SN74LS644, SN74LS645 OCTAL BUS TRANSCEIVRS SDLS189 – APRIL 1979 – REVISED MARCH 1988 Copyright 1988, 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.
SN54LS640 THRU SN54LS642, SN54LS644, SN54LS645 SN74LS640 THRU SN74LS642, SN74LS644, SN74LS645 OCTAL BUS TRANSCEIVRS SDLS189 – APRIL 1979 – REVISED MARCH 1988 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LS640 THRU SN54LS642, SN54LS644, SN54LS645 SN74LS640 THRU SN74LS642, SN74LS644, SN74LS645 OCTAL BUS TRANSCEIVRS SDLS189 – APRIL 1979 – REVISED MARCH 1988 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3
SN54LS640, SN54LS645 SN74LS640, SN74LS645 OCTAL BUS TRANSCEIVRS WITH 3-STATE OUTPUTS SDLS189 – APRIL 1979 – REVISED MARCH 1988 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LS640, SN54LS645 SN74LS640, SN74LS645 OCTAL BUS TRANSCEIVRS WITH 3-STATE OUTPUTS SDLS189 – APRIL 1979 – REVISED MARCH 1988 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5
SN54LS640, SN54LS645 SN74LS640, SN74LS645 OCTAL BUS TRANSCEIVRS WITH 3-STATE OUTPUTS SDLS189 – APRIL 1979 – REVISED MARCH 1988 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54LS641, SN54LS642, SN54LS644 SN74LS641, SN74LS642, SN74LS644 OCTAL BUS TRANSCEIVRS WITH OPEN-COLLECTOR OUTPUTS SDLS189 – APRIL 1979 – REVISED MARCH 1988 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7
SN54LS641, SN54LS642, SN54LS644 SN74LS641, SN74LS642, SN74LS644 OCTAL BUS TRANSCEIVRS WITH OPEN-COLLECTOR OUTPUTS SDLS189 – APRIL 1979 – REVISED MARCH 1988 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE MATERIALS INFORMATION www.ti.com 18-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SN74LS640-1NSR SO SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) NS 20 2000 330.0 24.4 8.2 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 13.0 2.5 12.0 24.0 Q1 SN74LS640DBR SSOP DB 20 2000 330.0 16.4 8.2 7.5 2.5 12.0 16.0 Q1 SN74LS640DWR SOIC DW 20 2000 330.0 24.4 10.8 13.3 2.7 12.0 24.
PACKAGE MATERIALS INFORMATION www.ti.com 18-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SN74LS640-1NSR SO NS 20 2000 367.0 367.0 45.0 SN74LS640DBR SSOP DB 20 2000 367.0 367.0 38.0 SN74LS640DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74LS640NSR SO NS 20 2000 367.0 367.0 45.0 SN74LS641-1DWR SOIC DW 20 2000 367.0 367.0 45.0 SN74LS641NSR SO NS 20 2000 367.0 367.0 45.
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°–ā8° 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.
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