SN74HC251NS

Overview

The SN74HC251NS is an 8-input data selector or multiplexer manufactured by Texas Instruments. It belongs to the 74HC series of high-speed CMOS logic devices and features three-state outputs for bus-driven applications. The component provides complete binary decoding to select one of eight data sources based on address inputs. It operates within a supply voltage range of 2 V to 6 V and supports a wide operating temperature range from -40°C to +85°C. The device is housed in a 16-pin DIP package.

Feature Summary

• Provides complete binary decoding to select one of eight data sources
• Features three-state outputs suitable for bus-driven systems
• Operates with a wide supply voltage range from 2 V to 6 V
• Supports operation across a wide industrial temperature range

Applications

• Data selection and routing
• Demultiplexing operations
• Parallel-to-serial conversion
• Boolean function generation

Procurement Notes

Verify the specific suffix 'NS' against official Texas Instruments documentation to confirm it denotes the standard 16-pin DIP package variant. Ensure the orderable part number matches current manufacturing status, as legacy designations may have been superseded by updated packaging codes or active product line revisions.

Selection Notes

Select this component when an 8-channel multiplexer with three-state output capability is required. It is appropriate for designs needing compatibility with standard CMOS logic families and operation across a broad voltage spectrum. Consider the physical DIP package constraints if surface-mount alternatives are preferred for automated assembly processes.

Part Context

This device is part of the Texas Instruments 74HC family of high-speed CMOS logic integrated circuits. The 74HC series is designed for general-purpose digital applications requiring low power consumption and high noise immunity. The SN74HC251 specifically addresses data routing needs within this logical framework.

Replacement Considerations

Compatible substitutes include the SN74HC251DR (SOIC package) and the CD74HC251M (SOIC package). Verify pinout compatibility and electrical specifications before substituting different package types.