SN54LS640 THRU SN54LS642, SN54LS644, SN54LS645 SN74LS640THRU SN74LS642, SN74LS644, SN74LS645 OCTAL BUS TRANSCEIVERS

SDLS189 - APRIL 1979 - REVISED MARCH 1988

PRODUCTION DATA documents contain information current as of publicationdate. Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily include testingof all parameters.

features

SN74LS64X-1 Versions Rated at I_OL of 48 mA
Bi-directional Bus Transceivers in High-Density 20-Pin Packages
Hysteresis at Bus Inputs Improves Noise Margins
Choice of True or Inverting Logic
Choice of 3-State or Open-Collector Outputs

description

These octal bus transceivers are designed for asynchronous two-way communicationbetween data buses. The devices transmit data from the A bus to the B busor from the B bus to the A bus depending upon the level at the direction control(DIR) input. The enable input (G\) can be used to disable the deviceso the buses are effectively isolated.

The -1 versions of the SN74LS640 thru SN74LS642, SN74LS644, and SN74LS645are identical to the standard versions except that the recommended maximumI_OL is increased to 48 milliamperes. There are no -1 versions ofthe SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645.

The SN54LS640 thru SN54LS642, SN54LS644, and SN54LS645 are characterizedfor operation over the full military temperature range of -55°C to 125°C.The SN74LS640 thru SN74LS642, SN74LS644, and SN74LS645 are characterized foroperation from 0°C to 70°C.

Title: OCTAL BUS TRANSCEIVERS
Product Family: UNIVERSAL BUS TRANSCEIVERS (UBTS)
Device Functionality: BUS TRANSCEIVERS
Orderable Devices: SN54LS640J, SNJ54LS640FK, SNJ54LS640J, SNJ54LS640W, SN54LS645J, SNJ54LS645FK, SNJ54LS645J, SNJ54LS645W, SN74LS640-1DW, SN74LS640-1DWR, SN74LS640-1N, SN74LS640DW, SN74LS640DWR, SN74LS640N, SN74LS640N3, SN74LS640-1DW, SN74LS640-1DWR, SN74LS640-1N, SN74LS641-1DW, SN74LS641-1DWR, SN74LS641-1N, SN74LS641-1N3, SN74LS641DW, SN74LS641DWR, SN74LS641N, SN74LS641N3, SN74LS641-1DW, SN74LS641-1DWR, SN74LS641-1N, SN74LS641-1N3, SN74LS642-1DW, SN74LS642-1N, SN74LS642DW, SN74LS642N, SN74LS642-1DW, SN74LS642-1N, SN74LS644-1N, SN74LS644N, SN74LS645-1DW, SN74LS645-1DWR, SN74LS645-1N, SN74LS645-1N3, SN74LS645DW, SN74LS645DWR, SN74LS645N, SN74LS645N3, SN74LS645-1DW, SN74LS645-1DWR, SN74LS645-1N, SN74LS645-1N3

View the complete PDF datasheet: sdls189.pdf (378 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN54LS640, SN54LS645, SN74LS640, SN74LS640-1, SN74LS641, SN74LS641-1, SN74LS642, SN74LS642-1, SN74LS644, SN74LS645, SN74LS645-1

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