The MC54/74HC597A is identical in pinout to the LS597. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs.
This device consists of an 8–bit input latch which feeds parallel data to an 8–bit shift register. Data can also be loaded serially (see Function Table). The HC597A is similar in function to the HC589A, which is a 3–state device.

• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard No. 7A
• Chip Complexity: 516 FETs or 129 Equivalent Gates