SN74LS157NSR

Overview

The SN74LS157NSR is a Texas Instruments quad 2-input multiplexer belonging to the SN74LS series. It features four independent data selectors with common select and enable inputs, allowing selection between two sources for each bit. The device provides non-inverting outputs and utilizes Schottky barrier diode technology for high-speed operation. It operates within a supply voltage range of 4.75 V to 5.25 V and supports surface-mount installation in an SOIC-16 package.

Feature Summary

• Quad configuration providing four independent 2-to-1 data selectors
• Common select and enable inputs for synchronized channel switching
• Non-inverting buffered outputs presenting selected data in true form
• Schottky process fabrication ensuring high speed and glitch-free multiplexing

Applications

• Data routing between multiple sources in digital systems
• Generation of specific logic functions from variable inputs
• Parallel-to-serial conversion circuits
• Address decoding and bus switching applications

Procurement Notes

Verify the SN74LS157NSR datasheet specifications against system requirements before integration. Confirm that the operating temperature range and voltage limits align with the target application environment. Ensure proper handling procedures are followed due to the surface-mount packaging type. Cross-reference pinouts with existing designs to prevent connection errors during assembly.

Selection Notes

Select this component when high-speed data selection is required within standard TTL voltage levels. The quad architecture reduces board space compared to discrete single-channel solutions. Consider the LS series power consumption characteristics relative to other logic families. Verify compatibility with downstream logic inputs regarding voltage thresholds and current drive capabilities.

Part Context

This part belongs to the broader SN74LS family of low-power Schottky logic devices. It serves as a fundamental building block for complex digital signal processing and control systems. The NSR suffix indicates a tape-and-reel surface-mount variant suitable for automated manufacturing processes. It complements other multiplexers and demultiplexers in the Texas Instruments portfolio.

Replacement Considerations

Compatible substitutes include the SN74LS157D and SN74LS157N. These variants offer identical logical functionality but differ in packaging style. Verify pin compatibility and electrical parameters when transitioning between DIP and SOIC packages.