CD74HC4514ME4

Overview

The CD74HC4514ME4 is a high-speed CMOS logic device manufactured by Texas Instruments, belonging to the HC series. It functions as a 4-to-16 line decoder and demultiplexer with an integrated address latch. The component operates within a supply voltage range of 2 V to 6 V and supports surface-mount installation in a 24-pin SOIC package. It features a propagation delay of 23 ns and is rated for operation between -55°C and +125°C.

Feature Summary

• Integrates a 4-to-16 line decoder with a dedicated address latch for stable input handling
• Utilizes advanced silicon-gate CMOS technology for low power dissipation and high noise immunity
• Supports direct interface with standard TTL loads without requiring level shifting

Applications

• Memory address decoding systems
• Data routing and distribution networks
• High-speed digital signal processing interfaces

Procurement Notes

Verify the specific suffix 'E4' against the manufacturer's current datasheet to confirm lead-free compliance and RoHS status. Ensure the ordering part number matches the required package variant, as suffixes often denote tape-and-reel quantities or environmental certifications rather than functional changes. Cross-reference the manufacturer's official documentation for any recent product lifecycle updates.

Selection Notes

Select this component when a single-channel 4-to-16 decoding function with internal latching is required. The HC series offers speed comparable to low-power Schottky TTL while maintaining CMOS power efficiency. Verify that the 24-pin SOIC footprint fits the PCB layout constraints and that the 2V to 6V operating range aligns with the system power supply design.

Part Context

This device is part of the broader CD74HC4514 family, which includes variants such as the CD74HC4514M96 and CD74HC4514EE4. These components share identical logical functionality but differ in packaging styles, such as SOIC versus DIP, and manufacturing revisions. The ME4 designation specifically identifies the surface-mount version with associated environmental compliance markings.

Replacement Considerations

Compatible substitutes include MM74HC4514WMX from Fairchild Semiconductor. Both devices offer identical 4-to-16 decoding capabilities and HC-series performance characteristics. Verify pin compatibility and package dimensions before substituting.