SN74AHC139N

Signal Switches, Multiplexers, Decoders Overview

The SN74AHC139N is a dual 2-line to 4-line decoder/demultiplexer from Texas Instruments, belonging to the AHC logic series. It features fully buffered inputs and low-power CMOS technology. The device operates within a supply voltage range of 2 V to 5.5 V and supports a wide operating temperature range from -40°C to +85°C. Packaged in a 16-pin PDIP for through-hole mounting, it provides high-speed performance with a typical propagation delay of 8.5 ns at 5 V. Each decoder includes an active-low enable input that can function as a data input for demultiplexing applications.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent 2-to-4 decoding or demultiplexing circuits integrated into a single package
• Fully buffered inputs ensure clean signal transitions and reduced noise susceptibility
• Low-power consumption characteristics suitable for battery-operated systems
• Wide operating voltage range supporting compatibility with various digital logic families

Signal Switches, Multiplexers, Decoders Applications

• High-speed memory address decoding
• Data distribution in telecommunications equipment
• Portable consumer electronics requiring low power
• Industrial control system signal routing

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific suffix 'N' confirms the PDIP package type and commercial grade temperature rating. Confirm RoHS compliance status if required by assembly standards. Ensure the ordering part number matches the exact logic family (AHC) to avoid functional mismatches with similar HC or HCT variants. Check for any recent product lifecycle notices regarding availability.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when through-hole mounting is required for dual 2-to-4 decoding tasks. The AHC series offers faster switching speeds compared to standard HC devices while maintaining low power dissipation. Verify that the 5.5 V maximum supply voltage aligns with the system's power rails. Consider the 16-pin PDIP footprint constraints during PCB layout design.

Signal Switches, Multiplexers, Decoders Part Context

This component is part of the SN74AHC139 family, which includes surface-mount variants like the DGVR. Unlike the automotive-grade SN74HC139QPWRQ1, this part is designed for general commercial applications. It shares logical functionality with other decoders but is distinguished by its specific AHC speed and voltage characteristics combined with the traditional DIP packaging format.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74AHC139DGVR: Surface-mount alternative with identical logic functions but different package type.