SN74HCS138QWBQBRQ1

Overview

The SN74HCS138QWBQBRQ1 is an automotive-qualified, high-speed silicon gate CMOS decoder featuring three address inputs and eight active-low outputs. It operates within a supply voltage range of 2 V to 6 V and supports temperatures from -40°C to +125°C. The device utilizes Schmitt-trigger inputs for noise tolerance and includes wettable flank QFN packaging.

Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD protection levels
• Schmitt-trigger inputs provide enhanced noise rejection and support slow input signal transitions
• Wettable flank WQFN package design facilitates reliable soldering and automatic optical inspection

Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data in solid-state memory systems

Procurement Notes

Verify the specific WBQB package variant against the official datasheet orderable addendum. Confirm that the AEC-Q100 qualification aligns with your system's environmental requirements. Ensure input signals remain within the absolute maximum ratings to prevent damage. Validate thermal performance under expected load conditions before finalizing procurement.

Selection Notes

Select this component when automotive reliability and wide voltage operation are required. The Schmitt-trigger architecture is suitable for noisy environments or slow signal edges. Consider the wettable flank package for improved assembly inspection capabilities compared to standard QFN variants.

Part Context

This part belongs to the SN74HCS138-Q1 family of 3-to-8 line decoders. It shares functional characteristics with other members like SN74HCS138DYYRQ1 but differs in package type. The WBQB suffix specifically denotes the wettable flank WQFN configuration.

Replacement Considerations

SN74HCS138DYYRQ1 offers similar functionality in an SOT-23-THN package.