View mc74hct245a datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HCT245A Octal 3-State Noninverting Bus Transceiver with J SUFFIX LSTTL Compatible Inputs CERAMIC PACKAGE 20 CASE 732–03 High–Performance Silicon–Gate CMOS 1 The MC54/74HCT245A is identical in pinout to the LS245. This device N SUFFIX may be used as a level converter for interfacing TTL or NMOS outputs to PLASTIC PACKAGE High Speed CMOS inputs. 20 CASE 738–03 The MC54/74HCT245A is a 3–state noninverting transceiver that is 1 used for 2–way asynchronous communication between data buses. The DW SUFFIX device has an active–low Output Enable pin, which is used to place the 20 SOIC PACKAGE I/O ports into high–impedance states. The Direction control determines 1 CASE 751D–04 whether data flows from A to B or from B to A. SD