74HC238BQ-Q100X

Overview

The Nexperia 74HC238BQ-Q100X is a 3-to-8 line decoder and demultiplexer in the 74HC series, housed in a DHVQFN16 package (SOT763-1). It decodes three binary weighted address inputs to eight mutually exclusive active HIGH outputs. The device features three enable inputs: E1 and E2 are active LOW, while E3 is active HIGH. It operates on a single power supply ranging from 2.0 V to 6.0 V and supports an ambient temperature range of -40 °C to +125 °C. Outputs provide high noise immunity and CMOS low power dissipation.

Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1 standard
• Demultiplexing capability using active LOW enable inputs as data strobes
• Multiple input enable configuration for easy parallel expansion to larger decoders
• DHVQFN package with side-wettable flanks enabling automatic optical inspection

Applications

• Memory chip select decoding
• Parallel expansion to 1-of-32 decoders
• Eight-output demultiplexer configurations

Procurement Notes

Verify that the specific ordering suffix matches the required automotive grade and package variant. Confirm the logic family designation aligns with system voltage requirements, as HC and HCT variants differ in input levels. Ensure the component meets the specified operating temperature range for the intended environment before finalizing procurement orders.

Selection Notes

Select this component when an automotive-grade decoder with wide supply voltage flexibility is required. The DHVQFN package offers a compact footprint suitable for space-constrained designs. Verify compatibility with existing address lines and ensure enable pin logic levels match the control signals provided by the host microcontroller or processor.

Part Context

This part belongs to the Nexperia 74HC238-Q100 product family, which includes variants like the 74HCT238BQ-Q100X. While sharing identical functional descriptions and pinouts, the HC series utilizes CMOS input levels, whereas the HCT series uses TTL-compatible levels. All variants support the same DHVQFN16 packaging and automotive qualification standards.

Replacement Considerations

The SN74HCS238BQBR from Texas Instruments is listed as a substitute option.