The 'F545 is an 8-bit TRI-STATE high-speed transceiver It provides bidirectional drive for bus-oriented microprocessor and digital communications systems Straight through bidirectional transceivers are featured with 24 mA (20 mA Mil) bus drive capability on the A ports and 64 mA (48 mA Mil) bus drive capability on the B ports One input Transmit Receive (T R) determines the direction of logic signals through the bidirectional transceiver Transmit enables data from A ports to B ports Receive enables data from B ports to A ports The Output Enable input disables both A and B ports by placing them in a TRI-STATE condition