CD74HC595NS

Shift Registers Overview

The CD74HC595NS is an 8-bit serial-in, parallel-out shift register manufactured by Texas Instruments. It belongs to the 74HC logic family and features 3-state output registers for bus-driven applications. The device operates on a single power supply ranging from 2 V to 6 V. It utilizes a 16-pin Plastic Dual In-line Package (PDIP) designed for through-hole mounting. Key electrical specifications include a maximum propagation delay of 34 ns at nominal voltage and an operating temperature range spanning from -40 °C to +85 °C.

Shift Registers Feature Summary

• Provides serial-to-parallel data conversion capability with independent storage register control
• Features 3-state outputs allowing direct connection to microprocessor buses without external buffers
• Supports cascading operations via dedicated serial output pin for multi-stage expansion

Shift Registers Applications

• LED display matrix scanning systems requiring serial data input
• Industrial control interfaces for expanding I/O ports in automation equipment
• Consumer electronics utilizing limited microcontroller pins for peripheral management

Shift Registers Procurement Notes

Verify the specific suffix 'NS' against official Texas Instruments documentation to confirm package type and material composition. Ensure compatibility with existing PCB footprints for 16-pin PDIP configurations. Cross-reference datasheet revisions to confirm electrical characteristics match design requirements. Confirm RoHS compliance status if environmental regulations apply to the final assembly.

Shift Registers Selection Notes

Select this component when designing circuits requiring reliable serial-to-parallel conversion within standard CMOS voltage ranges. Consider the 3-state output feature if the design necessitates direct interfacing with shared data buses. Evaluate the through-hole packaging requirement against available manufacturing capabilities. Verify that the operating temperature range aligns with the intended environmental conditions of the end application.

Shift Registers Part Context

This part is a member of the widely adopted 74HC series of high-speed CMOS logic devices. It serves as a fundamental building block for digital systems needing data serialization or port expansion. The device complements other logic families by offering low power consumption alongside fast switching speeds suitable for general-purpose computing and control tasks.

Shift Registers Replacement Considerations

SN74HC595N: Direct functional equivalent with identical pinout and electrical characteristics.

Shift Registers FAQ

What is the function of the MR pin?

The Master Reset (MR) pin asynchronously resets all eight flip-flops in the shift register to a low state when driven low.

How does the OE pin affect operation?

The Output Enable (OE) pin controls the 3-state outputs; driving it low enables the outputs, while driving it high places them in a high-impedance state.