74AC139SCX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC139SCX is a dual 1-of-4 decoder/demultiplexer from the 74AC logic family, housed in a 16-SOIC surface-mount package. It operates on a single power supply ranging from 2 V to 6 V and supports an industrial temperature range of -40°C to +85°C. The device contains two independent decoding circuits, each featuring one input line and four output lines with inverted polarity. It provides high drive capability with output currents of 24 mA for both high and low states.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 1-of-4 decoding functionality within a single integrated circuit
• Inverted active-low outputs for precise signal selection
• Wide operating voltage compatibility supporting 2 V to 6 V systems
• High current drive capability suitable for direct load interfacing

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based memory systems
• Data distribution and demultiplexing in communication interfaces
• Control signal routing in industrial automation equipment
• Peripheral selection in embedded system architectures

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'SCX' against the manufacturer's official datasheet to confirm the SOIC-16 package and tape-and-reel orientation. Ensure the order quantity aligns with standard factory packaging requirements. Confirm RoHS compliance status through the latest environmental declaration documents provided by onsemi before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding channels are required in a compact surface-mount form factor. The AC series offers faster switching speeds compared to standard 74LS variants while maintaining compatible pinouts. Verify that the system voltage falls within the 2 V to 6 V range and that the 24 mA output drive meets the load requirements without external buffering.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the widely adopted 74AC logic family, known for CMOS technology and high-speed performance. The 74AC139 specifically addresses applications requiring multiple independent decoding paths. It serves as a modern replacement for older bipolar logic families, offering lower power consumption and higher noise immunity while fitting into existing footprint designs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

MC74AC139DR2G and MC74AC139DG are confirmed direct substitutes from onsemi. These alternatives maintain identical logical functions and pin configurations. Verify package variations and reel specifications when substituting to ensure mechanical compatibility during assembly.