74HC238D-Q100J

Overview

The Nexperia 74HC238D-Q100J is an automotive-grade 3-to-8 line decoder and demultiplexer. It decodes three binary weighted address inputs (A0, A1, A2) to eight mutually exclusive active HIGH outputs (Y0 to Y7). The device features three enable inputs: E1 and E2 are active LOW, while E3 is active HIGH. Outputs remain LOW unless E1 and E2 are LOW and E3 is HIGH. Qualified to AEC-Q100 Grade 1 standards, it operates from -40 °C to +125 °C in a 16-lead SO plastic small outline package (SOT109-1).

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards for extended temperature operation.
• Demultiplexing capability allows use of active LOW enable inputs as data inputs with remaining enables as strobes.
• Multiple input enable configuration facilitates easy parallel expansion to larger decoder architectures.
• Inputs include clamp diodes enabling interface to voltages exceeding VCC using current limiting resistors.

Applications

• Memory chip select decoding
• Automotive electronic systems requiring Grade 1 qualification
• Parallel expansion to 1-of-32 decoder configurations

Procurement Notes

Verify the specific suffix 'J' against official Nexperia documentation to confirm packaging details, as standard datasheets may list variants without this suffix. Confirm that the SO16 package corresponds to SOT109-1. Ensure the component meets the required AEC-Q100 Grade 1 specifications for your target automotive application environment.

Selection Notes

Select this component when an active HIGH output decoder is required for automotive environments. The HC logic family provides CMOS input levels suitable for general digital interfaces. Consider the HCT variant if TTL input levels are necessary for compatibility with legacy logic families within the system design.

Part Context

This part belongs to the Nexperia 74HC(HCT)238-Q100 series of 3-to-8 line decoders and demultiplexers. The series includes variants in SO16, TSSOP16, and DHVQFN16 packages. All variants share identical logical functionality but differ in physical footprint and thermal characteristics, allowing designers to choose based on board space and heat dissipation requirements.

Replacement Considerations

Nexperia offers the 74HCT238D-Q100J for TTL-compatible applications. Other manufacturers provide equivalent 3-to-8 decoders, but direct pin-for-pin replacements must be verified against AEC-Q100 Grade 1 requirements and voltage level compatibility.