SN74LS157D

Overview

The SN74LS157D is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. It belongs to the LS (Low-power Schottky) logic family, ensuring high-speed operation with low power dissipation. The device features four independent multiplexers sharing common select and enable inputs. It utilizes a Schottky barrier diode process for enhanced speed and includes input clamp diodes to limit high-speed termination effects. The outputs present selected data in non-inverted form.

Feature Summary

• Quad 2-input multiplexer architecture
• Schottky process for high speed
• Non-inverting buffered outputs
• Input clamp diodes for termination

Applications

• Data routing between two sources
• Logic function generation
• Digital signal selection

Procurement Notes

Verify the specific manufacturer source, as the SN74LS157 part number is historically associated with multiple vendors including Motorola and ON Semiconductor. Confirm that the 'D' suffix corresponds to the SOIC-16 package intended for surface mount applications. Ensure compatibility with standard TTL voltage levels before integration into existing circuit designs.

Selection Notes

Select this component when a quadruple 2-to-1 multiplexer is required within Low-power Schottky logic constraints. It serves as a direct functional replacement for other quad 2-line selectors in the 74LS series. Consider the shared control inputs for simplified wiring compared to individual multiplexer implementations.

Part Context

This device is part of the broader 74LS logic family, designed for general-purpose digital applications requiring moderate speed and low power consumption. It complements other components like decoders and flip-flops in complex digital systems.

Replacement Considerations

Compatible substitutes include SN74LS157 from other manufacturers such as ON Semiconductor or Motorola, provided pinouts and electrical characteristics remain identical.