74HCT597D,652

Shift Registers Overview

The Nexperia 74HCT597D,652 is an 8-bit shift register with input flip-flops housed in a 16-lead SOIC package (SOT109-1). It operates within a supply voltage range of 4.5 V to 5.5 V and supports temperatures from -40 °C to +125 °C. The device features TTL-compatible inputs, positive edge-triggered clocks for both storage and shift registers, and direct load and clear functions. Key dynamic characteristics include a maximum propagation delay of 60 ns at 4.5 V and a maximum clock frequency of 20 MHz.

Shift Registers Feature Summary

• Includes an 8-bit parallel storage register feeding a serial-out shift register with independent positive edge-triggered clocks.
• Features direct overriding load and master reset inputs for immediate data control.
• Inputs are equipped with clamp diodes to allow interfacing with voltages exceeding VCC using current limiting resistors.

Shift Registers Applications

• Serial-to-parallel data conversion circuits
• Parallel-in serial-out data transmission systems
• Digital display multiplexing applications

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74HCT597 series is available in multiple configurations including TSSOP. Confirm that the application environment remains within the specified -40 °C to +125 °C temperature range. Ensure power dissipation limits are respected, particularly regarding linear derating above 110 °C for the SO16 package. Check for any recent product change notices affecting marking or assembly sources.

Shift Registers Selection Notes

Select this component when TTL logic levels are required for interface compatibility while maintaining CMOS low power consumption. The inclusion of input flip-flops allows for stable parallel data capture separate from the shifting operation. Consider the SO16 package dimensions if board space permits, noting the body width is 3.9 mm. Verify that the asynchronous master reset function meets system initialization requirements.

Shift Registers Part Context

This part belongs to the 74HCT family of high-speed CMOS logic devices manufactured by Nexperia. The 74HCT597 specifically provides shift register functionality with input latching capabilities. It is designed for general-purpose digital applications requiring reliable data storage and transfer between serial and parallel domains under standard 5 V logic conditions.

Shift Registers Replacement Considerations

The 74HCT597DB variant was removed from the product line in revision 5 of the datasheet. Designers should ensure their bill of materials does not reference obsolete package types like SSOP16 for this function code.