CD74HC237PWT

Overview

The CD74HC237PWT is a high-speed CMOS logic device manufactured by Texas Instruments, housed in a 16-pin TSSOP package. It functions as a 3-to-8 line decoder/demultiplexer with address latches. The circuit features three binary selection inputs (A0, A1, A2) that can be latched via an active-high latch enable (LE) signal to isolate output changes from input variations. It includes two output enable inputs (OE(1) and OE(0)) to facilitate cascading and demultiplexing operations. The selected outputs are active-high, distinguishing it from the CD74HC137 series.

Feature Summary

• Features address latching capability to maintain stable outputs despite input transitions
• Provides dual output enable inputs for simplified cascading and data routing control
• Delivers active-high decoded outputs suitable for memory addressing applications

Applications

• Memory address decoding systems
• Data routing and distribution networks
• Demultiplexing signal paths in digital circuits

Procurement Notes

Verify the specific suffix 'PWT' against the manufacturer's official datasheet to confirm the exact tape-and-reel quantity and moisture sensitivity level. Ensure the ordering part number matches the required package width and lead finish specifications defined in the latest Texas Instruments documentation before finalizing procurement.

Selection Notes

Select this component when active-high decoded outputs are required, contrasting with the active-low outputs of the CD74HC137. It is suitable for designs needing address latching to prevent glitches during input switching. Verify that the 2V to 6V supply voltage range aligns with the system power rails and that the TSSOP-16 package fits the board layout constraints.

Part Context

This device belongs to the Texas Instruments 74HC family of high-speed CMOS logic components. It shares functional similarities with the CD74HC137 but differs in output polarity. The HC series offers low static power consumption while maintaining speeds comparable to Low-Power Schottky TTL logic, making it versatile for general-purpose digital logic applications.

Replacement Considerations

The CD74HC137 serves as a functional alternative if active-low outputs are acceptable. Other compatible variants include the CD74HCT237 for TTL-compatible input levels. Verify pinout compatibility and electrical characteristics such as propagation delay and drive current before substituting.