74HC597P-E

Overview

The 74HC597P-E is an 8-bit shift register with input flip-flops manufactured by Renesas Electronics Corporation. It consists of an 8-bit storage register feeding a parallel-in, serial-out 8-bit shift register. Both registers feature positive edge-triggered clocks. The device includes direct load and clear inputs for the shift register. Inputs are equipped with clamp diodes to allow interfacing with voltages exceeding VCC using current limiting resistors. It operates within a wide supply voltage range and offers high noise immunity.

Feature Summary

• Features an 8-bit storage register that feeds a parallel-in, serial-out shift register.
• Includes direct overriding load and clear inputs for the shift register.
• Inputs incorporate clamp diodes to facilitate interfacing with voltages in excess of VCC.

Applications

• Digital data transmission systems requiring serial-to-parallel conversion
• Parallel output expansion for microcontroller I/O ports
• General-purpose digital logic circuits utilizing CMOS technology

Procurement Notes

Verify the specific suffix 'P-E' against official Renesas documentation to confirm package type and RoHS compliance status. Ensure the ordering part number matches the exact datasheet revision required for your design. Confirm availability through authorized distributors as standard stock levels may vary. Cross-reference the manufacturer's latest product change notices for any updates to pin configurations or electrical characteristics prior to final procurement.

Selection Notes

Select this component when an 8-bit shift register with input latching is required in a CMOS process. It is suitable for applications needing interface compatibility with voltages higher than the supply rail due to input clamp diodes. Consider the operating temperature range and supply voltage specifications (2.0V to 6.0V) to ensure compatibility with the target system environment. Verify that the package style meets the PCB layout requirements.

Part Context

This component belongs to the 74HC series of high-speed CMOS logic devices produced by Renesas Electronics. The 74HC597 variant specifically provides shift register functionality with input flip-flops. It is part of a broader family of general-purpose logic ICs designed for various digital applications. The 'P-E' suffix typically denotes a specific package configuration and environmental compliance status defined by the manufacturer.

FAQ

What is the function of the clamp diodes on the inputs?

The clamp diodes enable the use of current limiting resistors to interface the inputs to voltages in excess of VCC.

How are the storage and shift registers clocked?

Both the storage register and the shift register have positive edge-triggered clocks.