SN74LVC138APW

Overview

The SN74LVC138APW is a 3-line to 8-line decoder and demultiplexer from the Texas Instruments LVC logic family. It operates within a supply voltage range of 1.65 V to 3.6 V and features three address inputs and eight active-low outputs. The device utilizes a TSSOP-16 surface-mount package and supports a maximum propagation delay of 6.7 ns. It functions reliably across an industrial temperature range from -40°C to +85°C, incorporating Schmitt trigger inputs for noise immunity.

Feature Summary

• Provides decoding or demultiplexing functionality with three binary address lines controlling eight distinct output channels.
• Features active-low outputs that are asserted only when all three enable inputs are in their correct active states.
• Incorporates Schmitt trigger action on all inputs to ensure clean signal transitions and improved noise tolerance.

Applications

• Memory address decoding for data storage systems
• Demultiplexing digital signals in communication interfaces
• Control logic for peripheral device selection

Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-16 package variant required for your design. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure thermal management aligns with the specified operating temperature range during final assembly.

Selection Notes

Select this component when low-voltage operation between 1.65 V and 3.6 V is required. The LVC series offers faster switching speeds compared to standard LV counterparts. Verify pin compatibility if replacing older 74HC or 74HCT variants in existing layouts.

Part Context

This part belongs to the SN74LVC138A family of decoders. It serves as a fundamental building block for digital logic circuits requiring signal routing or address translation. The LVC technology balances speed and power consumption for portable applications.

Replacement Considerations

SN74LVC138APWR (Reel packaging), SN74LVC138APWG4 (Green/RoHS compliant version). Verify package dimensions and electrical characteristics match before substitution.