SN74LVC138AQDRQ1

Overview

The SN74LVC138AQDRQ1 is an automotive-grade 3-to-8 line decoder and demultiplexer from Texas Instruments, belonging to the LVC logic family. It operates within a supply voltage range of 2 V to 3.6 V and features low dynamic power consumption. The device provides three address inputs and eight active-low outputs, controlled by three enable inputs. It is designed for high-speed applications with propagation delays as low as 6.7 ns at 3.3 V. The component supports a wide operating temperature range from -40°C to +125°C and meets AEC-Q100 qualification standards for automotive electronics.

Feature Summary

• Automotive-grade reliability certified under AEC-Q100 standards for harsh environment operation
• Low dynamic power consumption suitable for battery-powered and energy-efficient systems
• Active-low outputs facilitate direct interfacing with various digital logic families
• Three enable inputs provide flexible control over decoding operations

Applications

• Automotive infotainment system address decoding
• Body control module signal routing
• Instrument cluster display driver selection
• Powertrain control unit peripheral addressing

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status. Ensure the 'D' package designation matches the required SOIC-16 footprint dimensions. Confirm RoHS compliance requirements align with project specifications. Validate that the manufacturer source document explicitly lists this part number as currently active and not obsolete.

Selection Notes

Select this component when automotive certification is mandatory for decoder applications. The LVC series offers superior speed compared to standard HC logic while maintaining low power usage. Verify that the 2 V to 3.6 V supply range matches the target system voltage. Consider the SOIC-16 package constraints regarding board space and thermal dissipation capabilities.

Part Context

This part belongs to the SN74LVC138A-Q1 family of automotive decoders. It serves as a functional equivalent to non-automotive SN74LVC138 variants but includes enhanced testing and documentation for automotive reliability. The Q1 suffix specifically denotes automotive qualification, distinguishing it from commercial grade counterparts in the same logical family.

Replacement Considerations

SN74LVC138APWRQ1 is a pin-compatible alternative in a different package type.