SN74AS645 Datasheet | Texas Instruments

description These octal bus transceivers are designed for asynchronous two-way munication 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. A2 A1 SN54ALS645A, SN54AS645 . . . J PACKAGE SN74ALS645A, SN74AS645 . . . DW OR N PACKAGE (TOP VIEW) DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 SN54ALS645A, SN54AS645 . . . FK PACKAGE (TOP VIEW) The -1 version of the SN74ALS645A is identical to the standard version, except that the remended maximum IOL is increased to 48 m A. There is no -1 version of the SN54ALS645A. 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. A8 B8 3 2 1 20 19 A3 4 18 B1 A4 5 17 B2 A5 6 16 B3 A6 7 15 B4 A7 8 14 B5 9 10 11 12 13 B7 B6 FUNCTION TABLE INPUTS OE DIR OPERATION B data to A...