SN74HC594DT

Shift Registers Overview

The SN74HC594DT is an obsolete 8-bit serial-in, parallel-out shift register with output registers manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features high-current outputs capable of driving up to 15 LSTTL loads. The device includes separate clocks for the shift and storage registers, along with independent direct overriding clear inputs. It utilizes a 16-pin SOIC package and supports an operating temperature range from -40°C to 125°C.

Shift Registers Feature Summary

• Contains an 8-bit serial-in, parallel-out shift register feeding an 8-bit D-type storage register.
• Features high-current outputs suitable for driving medium loads without significant voltage drops.
• Includes independent direct overriding clear inputs for both the shift and storage registers.

Shift Registers Applications

• Pro Audio Mixer
• Elevators and Escalators
• Human Machine Interface (HMI): Industrial Monitor
• Entertainment Systems
• Grid Infrastructure: Grid Control

Shift Registers Procurement Notes

Verify component status as the SN74HC594DT is listed as obsolete production. Confirm availability of active replacements such as SN74HC594DR or SN74HC594DWR through official channels. Ensure compatibility with existing PCB footprints when selecting alternative packages like SOIC DW or PDIP.

Shift Registers Selection Notes

Select this component for applications requiring serial-to-parallel data conversion with registered outputs. Consider the wide operating voltage range and low power consumption for portable systems. Verify that the 16-pin SOIC package dimensions fit the design constraints and that the thermal characteristics meet the system requirements.

Shift Registers Part Context

This part belongs to the SNx4HC594 family of 8-bit shift registers with output registers. It is designed for use in various logic applications where serial data needs to be converted to parallel format. The device is part of the broader 74HC series of CMOS logic devices known for their wide voltage operation and low power consumption.

Shift Registers Replacement Considerations

Direct substitutes include SN74HC594DR and SN74HC594DWR. These parts maintain functional equivalence but may differ in packaging details or manufacturing revisions. Verify pinout compatibility and electrical specifications before implementation.

Shift Registers FAQ

What is the function of the QH' output?

The QH' output provides a serial output for cascading purposes, allowing multiple shift registers to be connected in series.

How are the shift and storage register clocks triggered?

Both the shift register clock (SRCLK) and storage register clock (RCLK) are positive edge triggered.