HD74HC623 - Hitachi Semiconductor

HD74HC623 Octal Bus Transceivers

This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control fuction implementation allows for maximum flexibility in timing. This device allows data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic levels at the enable inputs (GBA and GAB). The enable inputs can.

Features

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• High Speed Operation: tpd (Bus to Bus) = 12 ns typ (CL = 50 pF) High Output Current: Fanout of 15 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C) Function Table Enable Inputs GBA L H H L GAB L H L H Operation HD74HC620 B data to A bus A data to B bus Isolation B data to A bus, A data to B bus HD74HC623 B data to A bus A data to B bus Isolation B data to A bus, A data to B bus HD74HC620/HD74HC623 Pin Arrangement Enable GAB 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 (Top view) 20 .