SN74LVC139APWR

Overview

The SN74LVC139APWR is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments LVC logic family. It operates within a supply voltage range of 1.65 V to 3.6 V and supports an operating temperature range of -40°C to +85°C. The device features a maximum propagation delay of 6.2 ns and provides outputs capable of sourcing or sinking up to 24 mA. Inputs accept voltages up to 5.5 V, enabling compatibility with 3.3-V and 5-V driving circuits. It is housed in a 16-pin TSSOP package.

Feature Summary

• Dual independent 2-to-4 decoding channels integrated into a single package
• Active-low enable inputs that function as data lines for demultiplexing applications
• Fully buffered inputs compatible with 3.3-V and 5-V signal levels
• ESD protection exceeding JESD 22 standards

Applications

• Address decoding in memory architectures
• Data routing and distribution in mixed-voltage systems
• Demultiplexing control signals
• General-purpose digital logic translation

Procurement Notes

Verify the specific ordering suffix 'R' indicates tape-and-reel packaging when sourcing this component. Confirm RoHS compliance status and lead finish specifications against the latest manufacturer documentation prior to procurement. Ensure the selected variant matches the required moisture sensitivity level and peak reflow temperature ratings for your assembly process.

Selection Notes

Select this component for low-voltage applications requiring high-speed decoding between 1.65 V and 3.6 V rails. Its input tolerance allows direct interfacing with 5-V legacy devices without external level shifters. Consider the TSSOP package dimensions for board space constraints and verify thermal requirements for dense surface-mount layouts.

Part Context

This part belongs to the SN74LVC139A series, which includes variants in different packages such as SOIC (SN74LVC139ADR) and SSOP (SN74LVC139ADBR). The APWR designation specifically identifies the TSSOP package configuration with tape-and-reel shipping. Other series members share identical electrical characteristics but differ in physical footprint and handling methods.

Replacement Considerations

Direct substitutes include other manufacturers' dual 2-to-4 decoders in TSSOP-16 packages. Verify pinout compatibility and ensure equivalent voltage ranges and output drive capabilities before substitution.