Datasheet Summary
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Octal 3-State Inverting Bus Transceiver
High- Performance Silicon- Gate CMOS
The MC54/74HC640A is identical in pinout to the LS640. The device inputs are patible with standard CMOS outputs; with pullup resistors, they are patible with LSTTL outputs.
The HC640A is a 3- state transceiver that is used for 2- way asynchronous munication between data buses. The device has an active- low Output Enable pin, which is used to place the I/O ports into high- impedance states. The Direction control determines whether data flows from A to B or from B to A.
- Output Drive Capability: 15 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating...