CD74HCT251M

Overview

The CD74HCT251M is a high-speed CMOS logic device manufactured by Texas Instruments, functioning as an 8-input multiplexer with three-state outputs. It operates within a single power supply voltage range of 2V to 6V and supports a wide operating temperature range from -55°C to 125°C. The component is housed in a 16-SOIC surface-mount package with a width of 3.90mm. It provides one independent circuit capable of selecting one of eight data inputs based on address lines.

Feature Summary

• Provides selectable routing of eight digital input signals to a single output line via address control inputs.
• Features three-state output capability allowing direct connection to bus structures without external buffering.
• Utilizes high-speed CMOS technology for low power consumption while maintaining fast switching speeds.

Applications

• Data routing in digital communication systems
• Address decoding in microprocessor-based designs
• Signal selection in test and measurement equipment

Procurement Notes

Verify the specific ordering suffix to confirm package type and environmental compliance. Confirm RoHS status and moisture sensitivity level requirements against system specifications. Check current production status as availability may vary due to lifecycle changes.

Selection Notes

Select this component when an 8-to-1 multiplexing function with three-state outputs is required in a compact surface-mount form factor. Ensure the system voltage falls within the 2V to 6V range and that the operating environment accommodates the specified temperature extremes.

Part Context

This part belongs to the Texas Instruments 74HC(T) series of high-speed CMOS logic devices. It shares functional similarities with other multiplexers in the family but is distinguished by its specific HCT input compatibility and SOIC packaging configuration.

Replacement Considerations

The CD74HC251M96 is listed as a parameter-equivalent alternative. Verify pinout compatibility and electrical characteristics before substitution.