HD74HC640 - Octal Bus Transceivers
Each device has an active enable G and a direction control input, DIR.
when DIR is high, data flows from the A inputs to the B outputs.
When DIR is low, data flows from the B inputs to the A outputs.
The HD74HC640 transfers inverted data from one bus to other and the HD74HC643 transfers inverted dat
HD74HC640 Features
* High Speed Operation: tpd = 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 Cont
