CD74HC237EE4

Overview

The CD74HC237EE4 is a high-speed silicon gate CMOS decoder manufactured by Texas Instruments. It functions as a 3-to-8 line decoder/demultiplexer with address latches, housed in a 16-pin PDIP package. The device operates within a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to 125°C. Key electrical specifications include a typical propagation delay of 13ns at VCC = 5V with a 15pF load, and balanced outputs capable of driving standard LSTTL loads.

Feature Summary

• Features three binary select inputs (A0, A1, A2) that can be latched by an active High Latch Enable signal to isolate outputs from input changes.
• Includes two Output Enable inputs (OE1 and OE0) designed to simplify cascading and facilitate demultiplexing applications.
• Provides active-high selected outputs for the HC variant, contrasting with the active-low outputs found in the HC137 counterpart.

Applications

• Memory address decoding
• Data routing
• I/O port selection

Procurement Notes

Verify the specific ordering suffix 'E4' corresponds to the intended lead finish and RoHS compliance status on the official Texas Instruments Package Option Addendum. Confirm the PDIP package designation matches the required board layout dimensions. Ensure the component status is listed as Active Production before finalizing procurement plans.

Selection Notes

Select this component when active-high decoded outputs are required, distinguishing it from the CD74HC137 which provides active-low outputs. Consider the wide 2V to 6V operating voltage range for compatibility with various logic families. Evaluate the need for address latching functionality to maintain output states during input transitions.

Part Context

This part belongs to the CD74HC237 family of high-speed CMOS logic decoders. It shares functional similarities with the CD74HC137 but differs in output polarity. The E4 suffix indicates environmental compliance and specific manufacturing attributes defined by Texas Instruments for catalog products.

Replacement Considerations

CD74HC237E serves as a direct equivalent without the E4 suffix. For active-low output requirements, consider the CD74HC137 series. Verify pinout compatibility and voltage levels when substituting with other 74HC logic families.