CD74HC157M

Overview

The CD74HC157M is a high-speed CMOS quad 2-input data selector/multiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features four independent multiplexers with a common select input. The device provides true (non-inverted) outputs and includes an active-low enable input that forces all outputs low when asserted. It utilizes a 16-pin SOIC surface-mount package and is designed for applications requiring low power consumption and compatibility with LSTTL logic levels.

Feature Summary

• Provides four independent 2-to-1 data selection paths controlled by a single common select line
• Features active-low enable functionality to force all outputs to a low state regardless of input conditions
• Delivers non-inverted (true) data outputs for direct signal routing
• Compatible with LSTTL logic inputs while maintaining low CMOS power consumption

Applications

• Routing data between two register banks to a common output bus
• General-purpose digital signal switching in control systems
• Function generator circuit implementations requiring multi-channel selection

Procurement Notes

Verify the specific suffix 'M' corresponds to the SOIC-16 package configuration as defined in the official datasheet. Confirm RoHS compliance status and lead-free material declarations directly from the manufacturer's current documentation, as these attributes may vary by production batch or regional regulatory requirements.

Selection Notes

Select this component when a quad multiplexer with common selection is required for low-voltage CMOS designs. Ensure the application supports the specified 2 V to 6 V operating range. Consider the SOIC-16 footprint constraints during PCB layout. Verify that the non-inverted output polarity meets the downstream logic requirements compared to inverted alternatives like the HC158.

Part Context

This part belongs to the Texas Instruments 74HC series of high-speed CMOS logic devices. The 74HC family is designed to be pin-compatible and functionally equivalent to the legacy Low-Power Schottky TTL (LSTTL) series, facilitating migration from older bipolar technologies to modern CMOS processes while offering significantly reduced power dissipation.

Replacement Considerations

The SN74HC157N serves as a functional equivalent in the PDIP-16 through-hole package. For inverted output requirements, the SN74HC158 offers identical internal architecture but with complemented outputs. Verify package type and pinout compatibility before substitution.