SN74LVC139ADT

Overview

The SN74LVC139ADT is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments LVC series. It operates from a supply voltage of 1.65 V to 3.6 V and features fully buffered inputs compatible with 3.3-V or 5-V driving devices. The device contains two independent decoders, each with active-low enable inputs that can function as data lines for demultiplexing. It provides a maximum propagation delay of 6.2 ns and includes ESD protection exceeding JESD 22 standards.

Feature Summary

• Dual independent 2-line to 4-line decoding capability within a single package
• Active-low enable inputs support both decoding and demultiplexing functions
• Fully buffered inputs ensure compatibility with mixed 3.3-V and 5-V system environments
• High ESD protection ratings exceed standard human-body and machine-model specifications

Applications

• Address decoding in memory architectures
• Data routing and demultiplexing in digital systems
• Signal translation between 3.3-V and 5-V logic domains
• Control logic for peripheral selection

Procurement Notes

Verify the specific ordering suffix 'DT' corresponds to the small tape-and-reel packaging configuration on official Texas Instruments documentation. Confirm the operating temperature range matches the -40°C to 85°C specification for this variant. Ensure the component status is listed as active production data before finalizing procurement plans.

Selection Notes

Select this component when a design requires two separate address decoding channels or demultiplexing paths in a low-voltage environment. The LVC series is appropriate for applications needing operation below 3.6 V while maintaining input tolerance for higher voltage control signals. Verify pinout compatibility with existing board layouts if replacing legacy parts.

Part Context

This part belongs to the SN74LVC139A family of dual decoders manufactured by Texas Instruments. It utilizes the SOIC-16 surface-mount package designated by the 'D' suffix in the base model number. The 'T' suffix indicates the specific reel quantity packaging option available for automated assembly processes.

Replacement Considerations

SN74LVC139ADR