CD74HC238EE4

Overview

The CD74HC238EE4 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 an 8-pin SOIC package. The component operates on a single power supply ranging from 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 for cascading control. It supports a wide operating temperature range from -55°C to 125°C.

Feature Summary

• Provides 3-to-8 decoding functionality with non-inverting outputs suitable for data routing
• Includes multiple enable inputs to facilitate cascaded configurations
• Operates within a wide voltage range compatible with standard CMOS systems

Applications

• Memory address decoding in digital systems
• Data routing and distribution networks
• I/O port selection circuits

Procurement Notes

Verify the specific suffix EE4 against official manufacturer documentation to confirm package type and environmental compliance status. Ensure the source document explicitly identifies this part number as a distinct variant rather than a generic family member. Cross-reference the datasheet revision date to confirm current manufacturing status and availability constraints.

Selection Notes

Select this component when non-inverting output states are required for the specific application logic. Compare electrical characteristics against the HCT variant if TTL-level input compatibility is necessary instead of pure CMOS performance. Verify that the package dimensions match the target PCB footprint requirements before finalizing the design integration.

Part Context

This component belongs to the broader CD74HC238 family of high-speed silicon-gate CMOS decoders. These devices offer low power consumption while maintaining speeds comparable to low-power Schottky TTL logic. The family typically includes variants with different output polarities and packaging options to suit various system design constraints.

Replacement Considerations

Check for direct equivalents such as the CD74HC238M or CD74HC238PW which share identical logical functionality. Verify pinout compatibility and ensure that any substitute part meets the same voltage and temperature specifications.