CD74HCT137E

Overview

The CD74HCT137E is a high-speed CMOS logic device functioning as a 3-to-8 line decoder/demultiplexer. It features inverted outputs and includes address latches controlled by an active-high latch enable signal to isolate input changes. The component operates on a 5 V power supply and utilizes a 16-pin DIP package. It provides two output enable inputs to facilitate cascading and demultiplexing functions.

Feature Summary

• Incorporates address latching via an active-high latch enable signal to maintain stable outputs during input transitions
• Features inverted outputs suitable for memory address decoding applications
• Includes dual output enable inputs to support circuit cascading and data routing configurations

Applications

• Memory address decoding in digital systems
• Data routing and distribution networks
• Demultiplexing operations requiring isolated selection inputs

Procurement Notes

Verify the specific manufacturer origin, as Harris Corporation assets were acquired by Texas Instruments. Confirm RoHS compliance status, as historical Harris production often lacks modern environmental certifications. Ensure the package type matches the required DIP16 footprint and validate that the inverted output polarity aligns with the target circuit design requirements.

Selection Notes

Select this component when a 3-to-8 decoder with latched inputs is required for low-power CMOS applications. It offers speed comparable to Low-Power Schottky TTL while maintaining standard CMOS noise immunity. Verify compatibility with 5 V logic levels and ensure the inverted output state meets the downstream gate input requirements.

Part Context

This device belongs to the 74HCT series of high-speed CMOS logic components. It shares functional similarities with the CD74HC137 but maintains direct compatibility with TTL logic levels. The part is designed for general-purpose digital logic applications requiring reliable decoding and demultiplexing capabilities within standard industrial temperature ranges.

Replacement Considerations

The CD74HC137 serves as a logical alternative, offering identical functionality with non-inverted outputs. For pin-compatible replacements from other manufacturers, verify that the substitute supports the same 5 V operating voltage and DIP16 packaging constraints.