SN74HCT157N

Overview

The SN74HCT157N is a quad 2-input data selector/multiplexer from the HCT logic family. It features four independent channels, each selecting one of two inputs based on a common select line. The device operates within a supply voltage range of 4.5 V to 5.5 V and includes a strobe input for enabling or disabling outputs. It provides buffered inputs and outputs with high-current drive capabilities suitable for LSTTL loads.

Feature Summary

• Contains four independent 2-to-1 data selectors with shared selection control
• Features TTL-compatible inputs allowing direct interfacing with standard logic families
• Includes a dedicated strobe input to enable or disable all output gates simultaneously

Applications

• Data routing in digital systems
• Signal selection between multiple sources
• Logic level translation interfaces

Procurement Notes

Verify the specific ordering suffix to confirm package type and manufacturing status. Confirm RoHS compliance and lead finish details via the official TI Package Option Addendum. Ensure the selected variant matches the required operating temperature range and pin configuration for your PCB layout.

Selection Notes

Select this component when a quad multiplexer with TTL-compatible inputs is required. Verify that the system supply voltage remains within the 4.5 V to 5.5 V range. Consider the propagation delay specifications relative to your clock speeds and ensure adequate thermal management for the chosen package style.

Part Context

This part belongs to the Texas Instruments SN74HCT series, designed for compatibility with standard TTL logic levels while utilizing CMOS technology. The 'N' suffix indicates a 16-pin PDIP package. It serves as a general-purpose data selector within the broader 74xx logic family ecosystem.

Replacement Considerations

Compatible substitutes include SN74HC157 (CMOS inputs) and SN74LS157 (LSTTL). Verify input voltage thresholds and power consumption differences before substitution.