74ACT139SC

Signal Switches, Multiplexers, Decoders Overview

The MC74ACT139SC is a dual 1-of-4 decoder/demultiplexer from the 74ACT logic family, manufactured by onsemi. It integrates two independent decoding circuits within a single 16-pin SOIC package. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports surface mount installation. It is designed for industrial temperature ranges spanning from -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Integrates two independent 1-of-4 decoding circuits in a compact package
• Features active-low outputs for direct interfacing with logic systems
• Includes dedicated enable inputs for precise control of decoding operations

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory subsystems
• Demultiplexing data streams in digital communication interfaces
• Control signal routing in industrial automation equipment

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape/reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm current production status and availability before finalizing procurement plans.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding functionality is required within a single footprint. The ACT series offers faster switching speeds compared to standard TTL equivalents while maintaining compatible pinouts. Verify that the 4.5V to 5.5V operating voltage aligns with the system power rails and that the SOIC package fits the available PCB real estate constraints.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the 74ACT series, which provides high-speed CMOS performance with TTL-compatible inputs. The 139 designation specifically indicates a dual decoder/demultiplexer configuration. This family is widely used in legacy system upgrades where speed improvements are needed without redesigning the board layout.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Direct substitutes include the MC74ACT139DR2G and MC74ACT139DTR2G from onsemi. Other manufacturers may offer equivalent parts such as the SN74ACT139 or CD74ACT139, provided pin compatibility and electrical characteristics match.