SN74LVC139ADR

Overview

The SN74LVC139ADR is a dual 2-line to 4-line decoder/demultiplexer manufactured by Texas Instruments. It operates from a supply voltage range of 1.65 V to 3.6 V and features fully buffered inputs compatible with 3.3-V or 5-V driving circuits. The device contains two independent decoders within a single package, utilizing active-low enable inputs that function as data lines in demultiplexing applications. It provides a maximum propagation delay of 6.2 ns and includes ESD protection exceeding JESD 22 standards.

Feature Summary

• Dual 2-line to 4-line decoding and demultiplexing capabilities within a single integrated circuit
• Fully buffered inputs allowing direct interfacing with 3.3-V or 5-V logic devices
• Active-low enable inputs designed for use as data lines during demultiplexing operations
• Latch-up performance exceeding 250 mA per JESD 17 specifications

Applications

• Mixed 3.3-V/5-V system environments requiring signal translation
• Demultiplexing applications where the enable input serves as the data line
• Decoder functions for address decoding or control signal distribution

Procurement Notes

Verify the specific ordering suffix 'R' indicates tape and reel packaging when sourcing components. Confirm RoHS compliance status and lead finish details via the manufacturer's current Package Option Addendum. Ensure the moisture sensitivity level rating aligns with your assembly process requirements before procurement.

Selection Notes

Select this component for designs requiring low-voltage operation between 1.65 V and 3.6 V. It is suitable for mixed-voltage systems due to its 5.5-V tolerant inputs. Consider the SOIC-16 package dimensions and thermal characteristics if space constraints exist. Verify that the required propagation delay meets the timing specifications of your target application.

Part Context

This part belongs to the SN74LVC139A family of dual decoders and demultiplexers. It is produced in an SOIC (D) package with 16 pins. The device is classified as production data and is available in various packaging options including tubes and reels. It is distinct from other logic families such as LS or LVC variants with different voltage ranges.

Replacement Considerations

SN74LVC139ADRG4 is a qualified alternative version of this component.