CD74HC251E

Overview

The CD74HC251E is a high-speed CMOS logic device functioning as an 8-input multiplexer with three-state outputs. Manufactured by Texas Instruments, it operates within a supply voltage range of 2 V to 6 V and supports a wide operating temperature range from -55 °C to +125 °C. The component utilizes a 16-pin SOIC package and features low input leakage current typical of CMOS technology. It includes address inputs for data selection and an enable input for output control.

Feature Summary

• Provides eight selectable data inputs routed to a single output based on address signals
• Features three-state outputs allowing direct connection to bus structures
• Compatible with standard CMOS logic families for system integration

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Signal switching applications

Procurement Notes

Verify the specific suffix 'E' indicates the SOIC-16 package configuration when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the ordering part number matches the required pin count and package style for PCB layout compatibility.

Selection Notes

Select this component for applications requiring an 8-to-1 data selector with bus-compatible outputs. Consider the HC series characteristics regarding speed and power consumption relative to HCT variants if TTL compatibility is needed. Verify that the 2 V to 6 V supply range aligns with the target system voltage levels.

Part Context

This device belongs to the Texas Instruments CDx4HC251 family of high-speed CMOS logic components. It serves as a standard solution for multiplexing multiple data sources into a single line. The family shares functional similarities with other 8-input multiplexers but differs in output state capabilities and logic family specifications.

Replacement Considerations

Check for equivalent parts such as CD74HC251M or CD74HCT251 depending on package preference and logic level requirements. Verify pinout compatibility before substitution.