74ACT139SJ

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT139SJ is a high-speed, dual 1-of-4 decoder/demultiplexer belonging to the 74ACT logic series. It features two independent decoders housed in a 16-SOIC surface-mount package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -40°C to +85°C. Each decoder accepts one input line and provides four output lines, facilitating efficient signal routing and address decoding in digital systems.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 1-of-4 decoder/demultiplexer architecture for simultaneous signal processing
• High-speed CMOS technology ensuring rapid propagation delays for data-intensive applications
• Robust noise immunity with balanced propagation characteristics across outputs

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in memory systems
• Signal demultiplexing in communication interfaces
• Data routing in industrial control panels

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'SJ' against official datasheets to confirm pinout and packaging dimensions, as variations exist within the 74ACT139 family. Ensure compatibility with existing PCB footprints before integration. Confirm RoHS compliance status through current manufacturer documentation. Cross-reference lead times with authorized distributors to align with production schedules.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding is required within a single package to save board space. The 74ACT series offers faster switching speeds compared to standard 74LS counterparts while maintaining compatible logic levels. Verify that the 4.5V to 5.5V supply requirement matches the system power rails. Consider the SOIC-16 package constraints regarding thermal dissipation and mounting density.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the widely adopted 74ACT logic family, known for TTL-compatible inputs and CMOS low-power consumption. The 74ACT139 specifically addresses designs needing multiple decoder functions without increasing component count. It serves as a standard solution for legacy system upgrades where speed improvements are necessary over older LS or HC technologies.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Publicly confirmed substitute part numbers include MC74ACT139DR2G and 74ACT139SCX. These alternatives offer identical logical functionality and pin configurations. Verify package type consistency, as some substitutes may use different reel or tube packaging formats.