SN74HCS251QDRQ1

Overview

The SN74HCS251QDRQ1 is an automotive-grade 8-to-1 multiplexer with 3-state outputs and Schmitt-trigger inputs. 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 features balanced CMOS outputs capable of sourcing and sinking current, with typical leakage currents in the nanoampere range. It includes full binary decoding for data selection and strobe-controlled complementary outputs.

Feature Summary

• AEC-Q100 qualified for automotive applications with specified temperature grades and ESD classification levels.
• Schmitt-trigger inputs provide noise rejection and tolerance for slow or noisy input signals.
• Balanced CMOS 3-state outputs allow interfacing with bus-organized systems via high-impedance states.

Applications

• Data selection
• Multiplexing

Procurement Notes

Verify the specific package variant (SOIC) against project requirements. Confirm that the AEC-Q100 qualification aligns with automotive safety standards. Ensure supply voltage and temperature ranges meet system specifications. Check for any recent documentation updates regarding pin configurations or electrical characteristics before finalizing design integration.

Selection Notes

Select this component when an 8-channel multiplexer with Schmitt-trigger inputs is required for automotive environments. The wide operating voltage range suits various power supply architectures. Consider the 3-state output capability for bus sharing applications. Verify thermal performance under expected load conditions to ensure reliability within the specified temperature range.

Part Context

This part belongs to the SN74HCS251-Q1 family of automotive logic devices. It is designed for robust operation in harsh automotive environments. The Q1 suffix indicates automotive qualification. The device integrates full binary decoding to select one of eight data sources efficiently.

Replacement Considerations

Check for direct substitutes within the SN74HCS series. Verify pin compatibility and electrical specifications. Ensure alternative parts meet AEC-Q100 requirements if automotive use is intended. Review datasheets for any differences in switching characteristics or package dimensions.