74ACT157SJ

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT157SJ is a high-speed quadruple 2-input multiplexer belonging to the ACT series. It features four independent multiplexers, each with two data inputs and one output, sharing common select lines. The device utilizes CMOS technology with TTL-compatible inputs and provides true outputs. It is housed in a 16-lead Small Outline Integrated Circuit (SOIC) package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Contains four independent 2-to-1 multiplexers with shared selection control
• Features TTL-compatible input logic levels for direct interfacing
• Provides buffered true outputs suitable for bus-oriented applications

Signal Switches, Multiplexers, Decoders Applications

• Data routing in digital systems
• Bus switching applications
• Function generation circuits

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix SJ indicates the SOIC-16 surface mount package configuration. Confirm RoHS compliance status as historical Fairchild documentation may vary by production batch. Ensure the component matches the original manufacturer specifications rather than generic equivalents when sourcing replacements.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when requiring multiple independent signal paths controlled by a single set of select lines. The ACT series offers faster propagation delays compared to standard AC devices while maintaining low power consumption. Verify that the 16-pin SOIC footprint aligns with the target PCB layout requirements.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT family of logic integrated circuits, which bridges the performance gap between older TTL and newer CMOS technologies. The 74ACT157 specifically addresses applications needing multiple parallel data selectors within a compact surface-mount form factor.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include the 74AC157SJ for non-TTL input variants or other manufacturers' 74ACT157 parts in SOIC-16 packages. Verify pinout compatibility before substitution.