SN74HCS238QBQBRQ1

Overview

The SN74HCS238QBQBRQ1 is an automotive-qualified 3-to-8 line decoder and demultiplexer from Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an ambient temperature range of -40°C to +125°C. The device utilizes Schmitt-trigger inputs for noise immunity and features balanced CMOS push-pull outputs capable of driving up to 7.8 mA at 6 V. Propagation delay ranges from 7 ns to 54 ns depending on voltage and temperature. It is housed in a WQFN-16 package.

Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades
• Schmitt-trigger inputs provide tolerance for slow or noisy input signals
• Balanced CMOS push-pull outputs ensure similar sourcing and sinking current capabilities

Applications

• Memory device selection with shared data bus
• Reducing required number of outputs for chip select applications
• Routing data

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official orderable addendum to confirm the exact package type, as multiple packages are available for this logic family. Ensure the component meets AEC-Q100 Grade 1 requirements for your target operating temperature range. Confirm that the design accounts for the thermal resistance characteristics associated with the WQFN-16 package during implementation.

Selection Notes

Select this component when high noise immunity is required due to its Schmitt-trigger architecture. It is suitable for designs needing a wide supply voltage range up to 6 V. Consider the propagation delay specifications relative to system timing requirements. Verify that the output drive current meets the load requirements without exceeding absolute maximum ratings.

Part Context

This part belongs to the SN74HCS238-Q1 series, which is designed for automotive environments. It functions as a single 3:8 decoder with three strobe inputs (G2, G1, G0) to facilitate cascading and demultiplexing. The device is manufactured using high-speed silicon gate CMOS technology.

Replacement Considerations

Consult the manufacturer's datasheet for the complete list of orderable addenda. Other packages such as TSSOP, SOIC, and SOT-23-THN are available within the same functional family.