The SN74AC245N from Texas Instruments is an octal bus-transceiver featuring tri-state outputs that are designed for asynchronous two-way communication between data buses. It is optimized to provide high very data rates and implementations with high system noise immunity.The device has separate output-enable (OE1 and OE2), input-enable (IE1 and IE2), and direction-control (DIR1 and DIR2) inputs and is designed for a wide range of supply voltage (2.7V to 6.25V). Each group of four transceivers is controlled by one OE1 and one OE2 and, additionally, two DIR1 and two DIR2 control inputs for direction selection for the two groups of transceivers. A logic “1” at the OE1 and OE2 enables the outputs, while a logic “0” at the DIR1 and DIR2 sets the direction of data flow for the group of transceivers. The logic “1” at the IE1 and IE2 enables direction control inputs. Available in popular 16-pin packages (PDIP, SOIC, SSOP, or TSSOP).