DM74AS640WM

This advanced Schottky device,DM74AS640WM contains 8 pairs of 3- STATE logic elements configured as octal bus transceiver. This DM74AS640WM circuit is designed for use in memory, microprocessor systems and in asynchronous bidirectional data buses. This DM74AS640WM 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 DM74AS640WM 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 during power-up or power-down.