MC54HC640A

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 compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The HC640A is a 3–state transceiver that is used for 2–way asynchronous communication 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 Voltage Range: 2 to 6 V Low Input Current: 1 µA High Noise Immunity Characteristic of CMOS Devices In Compliance with the Requirements Defined by JEDEC Standard No. 7A Chip Complexity: 276 FETs or 69 Equivalent Gates MC54/74HC640A 20 1 J SUFFIX CERAMIC PACKAGE CAS...