MC74AC640 Datasheet | Motorola Semiconductor

.. MC74AC640 MC74ACT640 Octal Bidirectional Transceiver with 3ĆState Outputs The MC74AC640/74ACT640 octal bus transceiver is designed for asynchronous two-way munication between data buses. The device transmits data from bus A to bus B when T/R = HIGH, or from bus B to bus A when T/R = LOW. The enable input can be used to disable the device so the buses are effectively isolated. - Bidirectional Data Path - A and B Outputs Sink 24 m A/Source - 24 m A - ′ACT640 Has TTL patible Inputs N SUFFIX CASE 738-03 PLASTIC OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE OUTPUTS VCC 20 OE 19 B0 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 1 T/R 2 A0 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 GND DW SUFFIX CASE 751D-04 PLASTIC PIN NAMES A0- A7 OE T/R B0- B7 Side A Inputs or 3-State Outputs Output Enable Input Transmit/Receive Input Side B Inputs or 3-State Outputs TRUTH TABLE OE H L L L L T/R X H H L L Applied Inputs X H L H L Valid Direction I/P→O/P X A to B A to B B to A B to A Output X L H L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial FACT DATA Data Sheet 4 U . 5-1 .. MC74AC640 MC74ACT640 MAXIMUM RATINGS-...