SN74HC594DWE4

Shift Registers Overview

The SN74HC594DWE4 is an 8-bit serial-in, parallel-out shift register with an output storage register. 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 positive edge-triggered clocks for the shift and storage registers, along with independent direct overriding clear inputs for both sections. A serial (QH') output facilitates cascading. Typical propagation delay is 15 ns, with maximum input current limited to 1 µA.

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 shift and storage registers.
• Provides a serial output for cascading purposes.

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 the specific package variant against the datasheet orderable addendum, as suffixes indicate physical form factors rather than functional changes. Confirm RoHS compliance status and lead finish details via the manufacturer's official documentation. Ensure the component meets the required operating temperature range for the intended application environment before finalizing procurement.

Shift Registers Selection Notes

Select this component when a low-power CMOS solution with high drive capability is required for bus interface applications. The wide operating voltage range supports systems using various logic levels. Consider the separate clock inputs if independent control of shifting and latching is necessary. Verify that the output drive requirements do not exceed the specified limits to prevent bus contention or excessive edge rates into light loads.

Shift Registers Part Context

This part belongs to the SNx4HC594 family of 8-bit shift registers with output registers manufactured by Texas Instruments. It utilizes CMOS technology to provide balanced output drive and low power consumption. The device is designed for applications where output ringing is a concern, utilizing low drive characteristics to minimize overshoot and undershoot on outputs.

Shift Registers Replacement Considerations

Direct substitutes include SN74HC594DRG4 and SN74HC594DWG4. Verify pin compatibility and electrical specifications against the original requirement.