DM74AS640

This advanced Schottky device, DM74AS640 contains 8 pairs of 3-STATE logic elements configured as octal bus transceiver.This DM74AS640 circuit is designed for use in memory, microprocessor systems and in asynchronous bidirectional data buses.This device transmits data from the A bus to the B bus, or vice versa, depending upon the logic level of the direction control input (DIR). The enable input (G) can be used to disable the devices, effecting isolation of buses A and B. The 3-STATE circuitry also contains a protection feature that prevents these transceivers from glitching the bus dur-ing power-up or power-down.