MC74ACT157DR2

Overview

The MC74ACT157DR2 is a quad 2-input multiplexer manufactured by onsemi, belonging to the 74ACT logic series. It operates within a supply voltage range of 4.5 V to 5.5 V and features four independent multiplexing circuits in a single package. The device utilizes a 16-pin SOIC surface-mount package with a width of 3.90 mm. It supports low-level output currents of 24 mA and high-level output currents of -24 mA. The component is designed for operation across an extended temperature range from -40 °C to +85 °C.

Feature Summary

• Integrates four independent 2-to-1 multiplexers into a single compact package
• Provides high drive capability with 24 mA output current sourcing and sinking
• Compatible with standard 5 V CMOS logic families through ACT series specifications

Applications

• Data routing in digital communication systems
• Signal selection in microprocessor-based control units
• Address decoding and bus switching applications

Procurement Notes

Verify the specific suffix DR2 against official datasheets to confirm pinout and electrical characteristics match design requirements. Confirm RoHS compliance status as manufacturing processes may vary. Ensure the SOIC-16 package dimensions align with PCB footprint constraints. Check for lead-free certification if required by environmental regulations.

Selection Notes

Select this component when multiple independent signal paths require selection within a 5 V system. The ACT series offers faster propagation delays compared to standard AC logic while maintaining CMOS power efficiency. Verify that the 24 mA drive current meets load requirements without external buffering. Consider thermal dissipation capabilities within the SOIC-16 package for high-density designs.

Part Context

This part belongs to the MC74ACT157 family of multiplexers produced by onsemi. The ACT series bridges performance gaps between older TTL-compatible logic and modern high-speed CMOS technologies. Similar variants include MC74AC157 and MC74LCX157, differing primarily in voltage ranges and speed characteristics. The DR2 suffix indicates a specific tape-and-reel packaging configuration for automated assembly.

Replacement Considerations

MC74AC157DR2G serves as a compatible alternative with wider voltage tolerance. MC74LCX157DR2G offers lower voltage operation suitable for 3.3 V systems. Cross-reference datasheets to ensure pin compatibility and electrical parameter alignment before substitution.