74HCT126D-Q100J

Overview

The Nexperia 74HCT126D-Q100J is a quad buffer and line driver featuring three-state outputs controlled by active HIGH output enable inputs (nOE). It operates within a supply voltage range of 4.5 V to 5.5 V and complies with TTL input levels. The device is qualified to AEC-Q100 Grade 1 standards for automotive applications, supporting an ambient temperature range from -40 °C to +125 °C. It utilizes an SO14 plastic small outline package (SOT108-1) with 14 leads.

Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1 standards
• Three-state outputs controlled by active HIGH enable inputs
• TTL-compatible input levels for reliable interfacing
• High noise immunity and robust latch-up performance

Applications

• Automotive electronic systems requiring signal buffering
• Data bus driving applications with high impedance requirements
• Industrial control circuits operating at 5 V logic levels

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct package type and tape/reel configuration. Confirm that the AEC-Q100 Grade 1 qualification status matches the project requirements. Check for any recent product change notices or longevity program updates regarding availability and lifecycle status before finalizing procurement plans.

Selection Notes

Select this component when a quad buffer with three-state capability is required for 5 V logic systems. Ensure the application environment falls within the specified -40 °C to +125 °C temperature range. Verify that the TTL input thresholds align with the driving source voltage levels. Consider the SO14 package dimensions for PCB layout constraints compared to alternative packages like TSSOP.

Part Context

This part belongs to the Nexperia 74HCT126-Q100 series, which includes both HC and HCT variants. The HCT variant specifically ensures compatibility with TTL logic families while maintaining CMOS low power dissipation characteristics. The Q100 designation indicates automotive-grade reliability and qualification, distinguishing it from standard commercial logic devices.

Replacement Considerations

The 74HC126D-Q100J serves as a functional equivalent but requires verification of input level compatibility, as it uses CMOS rather than TTL thresholds. Other manufacturers' 74HCT126 equivalents may differ in pinout or electrical specifications; cross-reference datasheets carefully.