SN74LS157DRE4

Overview

The SN74LS157DRE4 is a quadruple 2-input multiplexer manufactured by Texas Instruments. It belongs to the 74LS logic family, utilizing Low-Power Schottky technology for high-speed operation with reduced power consumption. The device features four independent data selectors sharing common select and enable inputs. It operates within a supply voltage range of 4.75V to 5.25V and supports a propagation delay of 15ns at 5V with 15pF load. The component is housed in a 16-pin SOIC package and is designed for surface-mount installation.

Feature Summary

• Quad 2-input multiplexer architecture with common select and enable controls
• Low-Power Schottky (LSTTL) technology for enhanced speed and efficiency
• Non-inverting buffered outputs presenting selected data in true form
• Input clamp diodes provided to limit high-speed termination effects

Applications

• High-speed data routing in digital systems
• Generation of specific logic functions from two variables
• Glitch-free multiplexing in signal processing circuits

Procurement Notes

Verify the RoHS compliance status and specific manufacturing lot details upon order confirmation. Confirm that the REEL packaging format aligns with automated assembly requirements. Ensure the operating temperature range meets the environmental specifications of the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before finalizing procurement.

Selection Notes

Select this component when LSTTL compatibility is required for existing TTL-based designs. It serves as a suitable replacement for standard 74LS157 devices where low power consumption is prioritized alongside high switching speeds. Consider the 16-SOIC package constraints for PCB layout. Verify that the 5V supply voltage matches the system power rails. Evaluate the 15ns propagation delay against the maximum clock frequency requirements of the circuit design.

Part Context

This part is a member of the Texas Instruments 74LS series, representing Low-Power Schottky TTL logic. It provides quad multiplexing capabilities commonly used in microprocessor interfaces and data acquisition systems. The DRE4 suffix indicates a specific tape-and-reel packaging variant optimized for high-volume surface-mount manufacturing processes.

Replacement Considerations

Compatible substitutes include SN74LS157DR and SN74LS157ADRG4. These alternatives maintain identical logical functionality and pinout configurations while potentially differing in packaging or secondary manufacturing sources.