74ACT139CW

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74ACT139CW is a high-speed dual 1-of-4 decoder/demultiplexer belonging to the 74ACT logic series. It integrates two independent decoders, each accepting two binary weighted address inputs and enabling one of four outputs based on an active-low enable input. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 16-SOIC package. It functions reliably across an industrial temperature range from -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Integrates two independent 1-of-4 decoding circuits within a single package
• Features TTL-compatible inputs for direct interfacing with standard logic families
• Provides low output impedance for driving multiple loads or bus lines

Signal Switches, Multiplexers, Decoders Applications

• Address decoding in microprocessor-based systems
• Data distribution in digital communication interfaces
• Memory chip select generation in embedded controllers

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'CW' against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the selected package variant aligns with your PCB footprint constraints. Cross-reference RoHS compliance documentation for material composition verification prior to final procurement approval.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when dual independent decoding channels are required within a compact form factor. The ACT series offers faster switching speeds compared to standard HC logic while maintaining TTL input compatibility. Verify that the 4.5V to 5.5V operating voltage range matches your system power rails before integration into the circuit design.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the widely adopted 74ACT family of CMOS logic devices, designed to bridge the performance gap between older TTL standards and modern AC logic. The 139 function code specifically denotes a dual decoder/demultiplexer configuration, commonly used in legacy and mixed-signal digital systems requiring reliable address selection and signal routing capabilities.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include MC74ACT139DWR2G and NCV74ACT139DWR2G from onsemi. Other manufacturers may offer equivalent parts under different numbering schemes, but verify pin compatibility and electrical specifications carefully.