CD74HC251M

Overview

The CD74HC251M is a high-speed CMOS logic device manufactured by Texas Instruments, functioning as an 8-input multiplexer with three-state outputs. It operates on a single power supply ranging from 2V to 6V and features a 16-pin SOIC package. The component supports a wide operating temperature range from -55°C to 125°C. Key electrical characteristics include output currents of 5.2mA for both high and low states. The device belongs to the 74HC series and is designed for surface-mount installation.

Feature Summary

• Provides eight selectable data inputs routed to a single output based on address selection
• Features three-state outputs allowing direct bus connection without external buffers
• Utilizes high-speed CMOS technology for efficient power consumption and fast switching

Applications

• Data routing in digital communication systems
• Address decoding for memory or peripheral selection
• Signal switching in test and measurement equipment

Procurement Notes

Verify the specific ordering suffix to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status as manufacturing processes may vary. Check for End-of-Life notices or obsolescence warnings before finalizing procurement plans. Ensure the supplier provides valid traceability documentation for quality assurance purposes.

Selection Notes

Select this component when an 8-to-1 multiplexing function with three-state capability is required. Consider the 2V to 6V supply voltage range for compatibility with various logic families. Evaluate the 16-SOIC package dimensions against available PCB real estate constraints. Verify that the propagation delay characteristics meet the timing requirements of the target application circuit.

Part Context

This part belongs to the Texas Instruments 74HC family of high-speed CMOS logic devices. It shares functional similarities with other multiplexers in the series but offers specific voltage and speed characteristics. The device is widely used in general-purpose digital logic applications requiring signal selection and routing capabilities within integrated circuits.

Replacement Considerations

Public confirmed substitute part numbers include CD74HC251MT, CD74HC151M96, and CD74HC151MT. Verify pinout compatibility and electrical specifications before substitution.