CD74HC238EG4

Overview

The CD74HC238EG4 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 SOIC package. The component operates on a single power supply with a voltage range of 2V to 6V. It features three binary address inputs (A0, A1, A2) that select one of eight outputs. The device includes two active-low enable inputs and one active-high enable input to facilitate cascading operations. It supports an operating temperature range from -55°C to +125°C.

Feature Summary

• Provides 3-to-8 decoding functionality with non-inverting outputs for data routing applications
• Includes multiple enable inputs to simplify cascading configurations
• Operates within a wide industrial temperature range suitable for harsh environments

Applications

• Memory address decoding systems
• Data routing circuits
• I/O port selection mechanisms

Procurement Notes

Verify the specific suffix 'E' against official datasheets to confirm package dimensions and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the 16-SOIC variant. Confirm RoHS compliance status through current manufacturer documentation before finalizing procurement plans.

Selection Notes

Select this component when non-inverting output states are required for the decoded signals. Compare against the CD74HC138 if inverted outputs are acceptable for the design. Verify that the HC series input thresholds align with the driving logic levels in the system architecture.

Part Context

This part belongs to the Texas Instruments CD74HC238 family of high-speed CMOS decoders. It shares functional similarities with other members like the CD74HC238M but differs in packaging and manufacturing revisions indicated by the suffix. The family is designed to replace lower-speed logic types while maintaining CMOS power efficiency.

Replacement Considerations

CD74HC238MT

FAQ

What is the logic function of the CD74HC238EG4?

It acts as a 3-to-8 line decoder/demultiplexer with non-inverting outputs.

How many enable inputs does the device have?

It has three enable inputs: two active-low and one active-high.