The MC74HC597A 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.
The HC597A is similar in function to the HC589A, which is a 3−state device.

FEATUREs
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 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
• These are Pb−Free Devices*