SN74HC594D

Shift Registers Overview

The SN74HC594D 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 supports a maximum clock frequency of 24 MHz at 5 V. The device features high-current push-pull outputs capable of driving up to 15 LSTTL loads. Propagation delay is typically 15 ns. It includes independent direct overriding clear inputs for both the shift and storage registers. The component is housed in a 16-pin SOIC package.

Shift Registers Feature Summary

• Provides separate clocks and direct overriding clear inputs for independent control of shift and storage registers.
• Features high-current outputs suitable for driving medium loads without significant voltage drops.
• Includes a serial output pin specifically designed for cascading multiple devices.

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 ordering suffix against the latest Package Option Addendum to confirm current production status. Some variants such as SN74HC594D are listed as obsolete while others like SN74HC594DR remain active. Ensure the selected part number matches the required RoHS compliance and lead finish specifications for the intended manufacturing process.

Shift Registers Selection Notes

Select this component when a CMOS logic family with wide voltage tolerance is required for serial-to-parallel data conversion. The high-current output capability makes it suitable for applications needing to drive multiple loads directly. Verify that the operating temperature range of -40°C to 125°C aligns with the environmental conditions of the target system design.

Shift Registers Part Context

This device belongs to the SNx4HC594 series of 8-bit shift registers manufactured by Texas Instruments. It utilizes standard CMOS technology to provide balanced output drive characteristics. The series is designed for bus interface applications where minimizing output ringing is critical due to low drive strength and controlled edge rates.

Shift Registers Replacement Considerations

Direct substitute part numbers include SN74HC594DR and SN74HC594DRG4 from the same manufacturer family.