View mc74hc245a datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC245A Octal 3-State Noninverting Bus Transceiver High–Performance Silicon–Gate CMOS J SUFFIX CERAMIC PACKAGE 20 The MC54/74HC245A is identical in pinout to the LS245. The device CASE 732–03 inputs are compatible with standard CMOS outputs; with pullup resistors, 1 they are compatible with LSTTL outputs. The HC245A is a 3–state noninverting transceiver that is used for 2–way asynchronous communication between data buses. The device has an N SUFFIX PLASTIC PACKAGE active–low Output Enable pin, which is used to place the I/O ports into 20 CASE 738–03 high–impedance states. The Direction control determines whether data 1 flows from A to B or from B to A. • Output Drive Capability: 15 LSTTL Loads DW SUFFIX • Outputs Directly