A10490 - SN74LS645N Octal Bus Transceiver (Motorola)

These octal bus transceivers are designed for asynchronous two-way communication between data buses. Control function implementation minimizes external timing requirements. These circuits allow data transmission from the A bus to B or from the B bus to A bus depending upon the logic level of the direction control (DIR) input. Enable input (G) can disable the device so that the buses are effectively isolated.

20 pin DIP. Manufactured by Motorola.
A10490