MC74HC595ADR

Shift Registers Overview

The MC74HC595ADR is an 8-bit serial-input/serial or parallel-output shift register with latched 3-state outputs manufactured by onsemi. It consists of an 8-bit shift register and an 8-bit D-type latch. The device operates within a supply voltage range of 2.0 to 6.0 V, supports an operating temperature from -55°C to +125°C, and features propagation delays ranging from 24 ns to 140 ns depending on voltage. It utilizes a SOIC-16 package.

Shift Registers Feature Summary

• Provides independent clock inputs for the shift register and storage latch.
• Features asynchronous reset functionality for the shift register only.
• Outputs are directly compatible with CMOS, NMOS, and TTL loads.

Shift Registers Applications

• Direct interface with SPI serial data ports on CMOS MPUs and MCUs
• Expansion of I/O capabilities in digital logic circuits
• Serial-to-parallel data conversion systems

Shift Registers Procurement Notes

Verify that the specific ordering suffix matches the required package type and shipping configuration. Confirm compliance requirements such as RoHS status and lead-free specifications against the manufacturer's current documentation before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when a wide operating voltage range and high noise immunity are required. Ensure the design accommodates the specified input rise/fall times and verify that the load requirements do not exceed the 15 LSTTL drive capability defined in the datasheet.

Shift Registers Part Context

This part belongs to the MC74HC595A family of silicon-gate CMOS logic devices. It represents an improvement over previous HC595/HCT595 generations with lower quiescent power and improved latchup immunity. The 'D' suffix indicates the SOIC-16 package format.

Shift Registers Replacement Considerations

MC74HC595ADG

Shift Registers FAQ

Does the Output Enable pin affect the serial output?

No, the Output Enable pin forces the parallel outputs (QA-QH) into a high-impedance state but does not affect the serial data output (SQH).

What is the function of the Reset pin?

The Reset pin is an active-low, asynchronous input that resets only the shift register portion of the device, leaving the 8-bit latch unaffected.