SN74HCS238DR

Overview

The SN74HCS238DR is a high-speed CMOS logic device belonging to the Texas Instruments HCS series. It functions as a 3-to-8 line decoder and demultiplexer with inverted outputs. The component operates within a supply voltage range of 2 V to 6 V and supports surface-mount installation in a SOIC-16 package. It features three address inputs and eight active-low data outputs, along with three enable inputs for precise control. The device is rated for an operating temperature range from -40°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 device activation states and prevent unintended signal propagation.
• Utilizes high-speed CMOS technology to ensure efficient power consumption alongside rapid switching performance.

Applications

• Address decoding in microprocessor-based systems
• Data routing in digital communication interfaces
• Memory chip selection circuits

Procurement Notes

Verify the specific suffix DR against official manufacturer documentation to confirm the SOIC-16 package type and tape-and-reel shipping configuration. Ensure compatibility with standard surface-mount assembly processes by checking pad layout specifications. Confirm that the ordered variant meets the required industrial or automotive qualification standards if applicable to the target design environment.

Selection Notes

Select this component when a compact solution for 3-to-8 decoding is required within a wide voltage window. The HCS series offers improved speed compared to legacy counterparts while maintaining low power dissipation. Consider the SOIC-16 footprint constraints and thermal characteristics during PCB layout planning to ensure reliable operation across the specified temperature extremes.

Part Context

This part belongs to the SN74HCS238 family of logic integrated circuits designed for general-purpose digital applications. The HCS designation indicates high-speed CMOS construction, distinguishing it from older HC or HCT variants. As a decoder/demultiplexer, it serves as a fundamental building block for managing complex digital signal paths in embedded controllers and peripheral interface modules.

Replacement Considerations

Cross-reference with SN74HCS238DWR or SN74HCS238DBR for alternative packaging options within the same logical family. Verify pinout compatibility before substituting with non-TI equivalents to avoid functional mismatches in address and enable configurations.