74LVC126ABQ-Q100X

Overview

The Nexperia 74LVC126ABQ-Q100X is a quad buffer and line driver featuring three-state outputs controlled by active-high output enable inputs. It operates within a supply voltage range of 1.2 V to 3.6 V, with inputs tolerant up to 5.5 V for mixed-voltage interfacing. The device includes Schmitt-trigger action on all inputs and IOFF circuitry to prevent backflow during partial power-down states. Qualified to AEC-Q100 Grade 1 standards, it supports an ambient temperature range from -40 °C to +125 °C and utilizes the DHVQFN14 package (SOT762-1) with side-wettable flanks.

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards
• Five-volt tolerant inputs and outputs for direct interface with 5 V logic
• IOFF circuitry prevents damaging backflow current during partial power-down applications
• DHVQFN package with side-wettable flanks enabling automatic optical inspection of solder joints

Applications

• Mixed 3.3 V and 5 V logic environments
• Automotive electronic systems
• Partial power-down applications requiring backflow prevention

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the base part number covers multiple options. Confirm the automotive grade designation corresponds to the intended application environment. Ensure the DHVQFN14 variant aligns with the PCB footprint design requirements. Cross-reference the latest datasheet revision to confirm any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Selection Notes

Select this component when designing circuits requiring isolation between different voltage domains, specifically interfacing 3.3 V devices with 5 V logic. The inclusion of Schmitt triggers makes it suitable for signals with slower rise and fall times. Consider the DHVQFN14 package if space constraints and thermal performance are priorities, noting its suitability for automated optical inspection. Verify that the operating temperature range meets the environmental conditions of the target system.

Part Context

This device belongs to the Nexperia 74LVC126A-Q100 family of quad buffers. The 'BQ' in the model number specifies the DHVQFN14 package variant (SOT762-1), distinguishing it from SO14 or TSSOP14 versions. The '-Q100' suffix indicates automotive qualification under AEC-Q100 Grade 1 standards, ensuring reliability for automotive electronics applications.

Replacement Considerations

Compatible substitutes include other 74LVC126 variants from Nexperia such as the 74LVC126AD-Q100 (SO14 package) or 74LVC126APW-Q100 (TSSOP14 package). Ensure the replacement maintains the same DHVQFN14 footprint and AEC-Q100 qualification if automotive compliance is required.