CD74HC238NSR

Overview

The CD74HC238NSR is a high-speed CMOS logic device manufactured by Texas Instruments, belonging to the HC series. It functions as a 3-to-8 line decoder and demultiplexer housed in a 16-pin TSSOP surface-mount package. The component operates on a single power supply ranging from 2V to 6V. It features three binary address inputs and eight active-low outputs, along with two active-low enable inputs and one active-high enable input for precise control. The device supports an operating temperature range from -55°C to +125°C.

Feature Summary

• Provides decoding and demultiplexing capabilities through three binary address lines controlling eight distinct output channels.
• Incorporates multiple enable inputs to manage chip activation, allowing for cascading or system-level gating.
• Utilizes high-speed CMOS technology to ensure low power consumption while maintaining fast switching speeds.

Applications

• Address decoding in microprocessor-based systems
• Data distribution in digital communication circuits
• Memory selection logic in embedded controllers

Procurement Notes

Verify the specific suffix NSR against official Texas Instruments documentation to confirm tape-and-reel packaging and lead-free status. Ensure compatibility with required voltage levels and thermal conditions before integration. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a compact surface-mount solution is required for 3-to-8 decoding tasks within the HC logic family. Consider the TSSOP package constraints and the specific enable logic requirements. Verify that the operating voltage and temperature ranges align with the target application environment.

Part Context

This device is part of the broader CD74HC238 product family, which includes variants with different packaging options such as SOIC and DIP. The HC series denotes high-speed CMOS technology, offering performance improvements over older standard TTL equivalents while maintaining compatible pinouts for many legacy designs.

Replacement Considerations

Compatible substitutes include other 3-to-8 decoders from the 74HC series, such as the SN74HC238 or equivalent parts from other manufacturers like NXP or ON Semiconductor, provided pinout and electrical specifications match.