SN74LVC138ADB

Overview

The SN74LVC138ADB 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, ensuring compatibility with low-voltage digital systems. The device features three binary address inputs and eight active-low outputs, allowing for precise signal routing or address decoding. Packaged in a 16-pin SOIC-Narrow (SOIC-16) surface-mount format, it supports industrial operating temperatures from -40°C to +85°C. This component integrates standard CMOS technology optimized for high-speed performance while maintaining low power consumption.

Feature Summary

• Provides 3-to-8 line decoding functionality with active-low outputs
• Operates across a wide supply voltage range from 1.65 V to 3.6 V
• Includes multiple enable inputs for flexible system control

Applications

• Address decoding for memory and I/O port selection
• Demultiplexing data signals in communication interfaces
• Control logic for peripheral device activation

Procurement Notes

Verify the exact suffix against the manufacturer's official documentation to confirm package type and temperature grade. Ensure the ordering part number matches the specific variant required for your design constraints. Cross-reference the datasheet revision date to confirm current specifications and compliance status before finalizing procurement.

Selection Notes

Select this component when designing circuits requiring low-voltage operation between 1.65 V and 3.6 V. It is suitable for applications needing fast switching speeds with minimal power dissipation. Consider the SOIC-16 package dimensions for PCB layout constraints and verify thermal requirements for the intended operating environment.

Part Context

This device belongs to the SN74LVC138A series, which represents a broad family of high-speed CMOS decoders. The LVC series is characterized by its ability to interface directly with various logic families while offering improved speed-over-power characteristics compared to older standards. It serves as a fundamental building block for complex digital logic designs requiring efficient signal distribution.

Replacement Considerations

Compatible alternatives include the SN74LVC138ADBR and SN74LVC138ADRE4. Verify pinout compatibility and electrical specifications before substitution.