74LVC126AD-Q100J

Overview

The Nexperia 74LVC126AD-Q100J is a quad buffer and line driver featuring 3-state outputs controlled by active HIGH enable inputs (nOE). It operates within a supply voltage range of 1.2 V to 3.6 V and supports 5 V tolerant inputs and outputs, facilitating translation between mixed 3.3 V and 5 V logic environments. The device incorporates Schmitt-trigger action at all inputs for noise immunity and includes IOFF circuitry to prevent backflow current during partial power-down conditions. Qualified to AEC-Q100 Grade 1 standards, it functions reliably from -40 °C to +125 °C.

Feature Summary

• Automotive qualification in accordance with AEC-Q100 Grade 1 standard
• 5 V tolerant inputs and outputs for interfacing with 5 V logic systems
• IOFF circuitry prevents damaging backflow current when powered down
• Schmitt-trigger action provides tolerance for slower input rise and fall times

Applications

• Mixed voltage level translation between 3.3 V and 5 V domains
• Partial power-down applications requiring isolation of powered-off sections
• Automotive electronic systems requiring Grade 1 component qualification

Procurement Notes

Verify the specific package variant against the ordering information table. The 'AD' suffix indicates the SO14 plastic small outline package (SOT108-1) with a body width of 3.9 mm. Confirm that the required temperature range matches the specified -40 °C to +125 °C operating limits. Ensure the design accounts for the active HIGH output enable logic state.

Selection Notes

Select this component when a quad non-inverting buffer with 3-state control is required for automotive or industrial environments. The 5 V tolerance allows direct interfacing with legacy 5 V logic without additional level shifters. The inclusion of IOFF protection makes it suitable for bus-hold applications where parts of the system may be powered down while others remain active.

Part Context

This part belongs to the Nexperia 74LVC126A-Q100 family of quad buffers. While other variants exist in different packages such as TSSOP14 (APW) or DHVQFN14 (ABQ), the AD variant specifically utilizes the SO14 package. All members share identical electrical characteristics, functional diagrams, and AEC-Q100 Grade 1 qualification status.

Replacement Considerations

74LVC126APW-Q100 (TSSOP14 package)

FAQ

How does the device handle partial power-down scenarios?

The integrated IOFF circuitry automatically disables the outputs, preventing potentially damaging backflow current through the device when the supply voltage is removed.

What is the logic state required to enable the outputs?

The outputs are enabled when the nOE (output enable) input is at a HIGH voltage level. A LOW on nOE causes the outputs to assume a high-impedance OFF-state.