Nexperia USA Inc. 74AHC126PW-Q100,11

Overview

74AHC126PW-Q100 from Nexperia is an automotive-qualified quad buffer/line driver with 3-state outputs, CMOS-level input compatibility, overvoltage-tolerant inputs (up to 7.0 V), and operation across -40 °C to +125 °C. It features balanced propagation delays (as low as 3.3 ns at VCC = 5.5 V, CL = 15 pF), Schmitt-trigger inputs, and TTL-compatible variants (74AHCT126PW-Q100) for mixed-voltage bus interfacing in engine control units and ADAS domain controllers.

For engineers reviewing the 74AHC126PW-Q100 datasheet, 74AHC126PW-Q100 pinout, 74AHC126PW-Q100 application, or 74AHC126PW-Q100 equivalent, key selection criteria include 3-state enable timing (tdis ≤ 9.5 ns), output drive capability (±8 mA at VCC = 4.5 V), AEC-Q100 Grade 1 qualification, and TSSOP14 package suitability for high-density automotive PCB layouts.

Technical Context

This device implements four independent non-inverting buffers, each with a dedicated active-HIGH output enable (nOE) controlling high-impedance state entry/exit. Input overvoltage tolerance enables safe level translation between 3.3 V logic domains and 5 V buses without external clamping.

Schmitt-trigger inputs provide noise immunity on slow-rising signals, while balanced tPLH/tPHL ensures minimal duty-cycle distortion in clock distribution paths. The 3-state architecture supports bidirectional bus sharing in CAN/LIN transceiver interface logic and sensor data multiplexing circuits.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 3-state buffer applications.

Compared with 74AHCT126PW-Q100, the AHC variant offers superior noise margin in noisy automotive environments due to higher VIH; versus SN74LVC126APWREP, it trades lower power for essential 7 V input tolerance required in under-hood applications.

Availability

74AHC126PW-Q100 is available at Aetrix Electronics and suitable for engine control units, ADAS camera modules, and body control modules requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for 74AHC126PW-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile applications.

The 74AHC-Q100 series delivers AEC-Q100 qualified logic devices engineered specifically for harsh automotive environments, emphasizing robustness, thermal stability, and long-term supply assurance.

FAQ

Is the 74AHC126PW-Q100 pin-compatible with standard 74HC126 packages?

Yes - the TSSOP14 (SOT402-1) footprint matches JEDEC MO-153 standards and is mechanically and electrically compatible with industry-standard 74HC126 TSSOP packages. Pin numbering, function mapping, and thermal pad layout are identical, enabling drop-in replacement in existing designs without PCB revision.

What is the maximum capacitive load this device can drive while maintaining specified timing?

The datasheet specifies timing parameters up to 50 pF load capacitance. At CL = 50 pF and VCC = 5.5 V, tpd remains ≤ 7.5 ns and tdis ≤ 9.5 ns. Driving loads beyond 50 pF increases propagation delay nonlinearly and may violate setup/hold margins in high-speed interfaces like SPI or parallel sensor buses.

Can the 74AHC126PW-Q100 be used with a 2.5 V supply voltage?

No - the minimum recommended VCC is 2.0 V, but static characteristics (VIH, VOL) are only guaranteed down to 2.0 V at -40 °C to +125 °C. At 2.5 V, VOH drops below 2.0 V (min) and VOL rises above 0.55 V (max), risking logic-level misinterpretation in downstream 3.3 V receivers; 3.0 V or higher is strongly recommended.

Does the exposed thermal pad on the TSSOP14 package require electrical connection?

No - the exposed pad in SOT402-1 is a mechanical thermal enhancement feature only. Per Nexperia documentation, it has no electrical function and may remain floating or be connected to GND solely for thermal conduction; no electrical tie is required or recommended for signal integrity.