SN74LV138AD

Overview

The SN74LV138AD is a 3-to-8 line decoder and demultiplexer from the Texas Instruments LV/LV-A/LVX/H series. It features two active-low and one active-high enable inputs to control eight active-low outputs. The device operates within a supply voltage range of 2 V to 5.5 V, ensuring compatibility with various logic families. It utilizes a 16-pin SOIC package and supports surface-mount installation. The component is designed for low-voltage applications, offering standard input regulation and high noise immunity suitable for general-purpose digital systems.

Feature Summary

• Provides decoding and demultiplexing functions via three address lines controlling eight distinct outputs
• Includes dual active-low and single active-high enable inputs for precise signal gating and system synchronization
• Supports wide supply voltage operation ranging from 2 V to 5.5 V for flexible integration

Applications

• Address decoding in microprocessor-based systems
• Demultiplexing data streams in communication interfaces
• Control logic for peripheral selection in embedded designs

Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and environmental compliance. Ensure the ordering part number matches the required pin configuration and RoHS status. Cross-reference the manufacturer's latest datasheet for any recent design changes or obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when a reliable 3-to-8 decoder is needed for low-voltage digital circuits. Consider the LV series characteristics for improved noise tolerance compared to older standards. Verify that the operating temperature range and supply voltage requirements align with the target application environment and system constraints.

Part Context

This device belongs to the SN74LV138A family of decoders and demultiplexers manufactured by Texas Instruments. The LV series is engineered for low-voltage operation while maintaining performance across a broad supply range. This specific model represents a standard industrial-grade solution for address decoding tasks in modern electronic equipment.

Replacement Considerations

Check for direct equivalents such as the SN74LV138ADGVR or SN74LV138APWR which share functional specifications but differ in packaging. Confirm pinout compatibility and electrical parameters before substituting to ensure seamless integration without circuit redesign.