CD74HCT238PWR

Overview

The CD74HCT238PWR is a high-speed CMOS logic decoder and demultiplexer manufactured by Texas Instruments. It features three binary select inputs (A0, A1, A2) that determine which of the eight outputs is activated. The device includes two active-low enable inputs (E1, E2) and one active-high enable input (E3) to facilitate cascading. It operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. The component is housed in a 16-pin TSSOP surface-mount package.

Feature Summary

• Provides 3-to-8 line decoding with both inverting and non-inverting output options
• Features dual active-low and single active-high enable inputs for flexible system integration
• Delivers high-speed performance comparable to low-power Schottky TTL while maintaining CMOS power efficiency

Applications

• Memory address decoding
• Data routing applications
• Cascaded decoder systems

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-16 package and tape-and-reel packaging configuration. Confirm the HCT logic family compatibility with your system's 5V logic levels. Ensure the operating temperature range meets your environmental requirements. Cross-reference the manufacturer part number against official Texas Instruments documentation to validate authenticity and revision status before procurement.

Selection Notes

Select this component when a high-speed decoder with multiple enable controls is required. The HCT series ensures compatibility with standard 5V TTL logic interfaces. Consider the TSSOP package for space-constrained surface-mount designs. Verify that the 3-to-8 line decoding capability aligns with the address or data selection needs of the target circuit design.

Part Context

This component belongs to the Texas Instruments CD74HCT series of high-speed CMOS logic devices. It is functionally related to the CD74HC238 but utilizes HCT input structures for better compatibility with TTL-driven systems. The device serves as a core element in digital logic circuits requiring precise signal routing and memory addressing functions.

Replacement Considerations

CD74HCT238PWRE4 and CD74HCT238PWRG4 are confirmed equivalent variants from Texas Instruments.