74AC139SC

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74AC139SC is a dual 1-of-4 decoder/demultiplexer from the 74AC logic family. It operates within a supply voltage range of 2V to 6V and supports surface-mount installation in a 16-SOIC package. The device features two independent decoding circuits, each with one input line and four output lines. It functions across an industrial temperature range of -40°C to +85°C. Outputs provide high and low currents of 24mA. The component is RoHS compliant and classified under standard logic ICs.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 1-of-4 decoding circuits integrated into a single package
• High-current outputs capable of sourcing and sinking 24mA
• Wide operating voltage range supporting 2V to 6V supply rails
• Industrial temperature rating for reliable performance in harsh environments

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory systems
• Demultiplexing data streams in digital communication interfaces
• Control signal distribution in embedded systems
• Peripheral selection in microcontroller-based designs

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Confirm RoHS compliance status through manufacturer declarations. Check for alternate pin-compatible variants if lead times are critical. Ensure ESD handling protocols are followed during assembly. Validate thermal requirements for the intended application environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding is required within limited board space. The 74AC series offers faster switching speeds compared to legacy 74LS equivalents. Consider the 24mA output drive capability for direct interface with loads without additional buffering. Verify voltage compatibility with the system's power supply rails before integration.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the widely adopted 74AC (Advanced CMOS) logic family, known for high-speed operation and low power consumption. It serves as a functional replacement for older bipolar technologies in modern digital designs. The 16-SOIC package facilitates automated surface-mount assembly processes.

Signal Switches, Multiplexers, Decoders Replacement Considerations

MC74AC139DTR2G is a documented equivalent offering identical logical functionality in a TSSOP-16 package. Cross-reference pinouts and electrical characteristics to ensure mechanical fit and performance parity.