SN74AHC139DG4

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC139DG4 is a dual 2-to-4-line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 5.5 V and supports a propagation delay of 10.5 ns at 5 V. The device functions across an extended temperature range from -40°C to +125°C. It utilizes a 16-pin TVSOP package for surface-mount applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Integrates two independent 2-to-4-line decoders or demultiplexers within a single package
• Supports wide supply voltage operation ranging from 2 V to 5.5 V
• Provides high-speed performance with low propagation delays
• Designed for extended industrial operating temperatures up to 125°C

Signal Switches, Multiplexers, Decoders Applications

• Address decoding for memory and I/O port selection
• Demultiplexing data signals in communication systems
• Control logic for peripheral device activation
• General-purpose digital signal routing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix DG4 indicates lead-free composition and RoHS compliance when sourcing. Confirm the TVSOP-16 package dimensions match your PCB footprint requirements. Ensure the supply voltage does not exceed 5.5 V to prevent damage. Check for automotive qualification if operating in harsh environments, as standard versions may differ from Q1 variants.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring dual independent decoding channels in a compact surface-mount form factor. The AHC series offers faster switching speeds compared to standard HC logic while maintaining CMOS compatibility. Consider the 2 V to 5.5 V operating range for flexibility in mixed-voltage systems. Verify thermal management needs for the +125°C maximum junction temperature limit.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74AHC139 family of dual 2-to-4-line decoders. It serves as a high-speed CMOS alternative to legacy TTL-compatible logic families. The device is commonly used in embedded systems where space constraints and power efficiency are critical design parameters.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC139DRG4 is a verified equivalent variant with identical electrical characteristics and functionality.