Nexperia USA Inc. 74AHC126PW,112

Overview

74AHC126PW,112 from Nexperia is a quad non-inverting buffer/line driver with 3-state outputs, designed for bus-oriented applications requiring level translation and output isolation. It features CMOS-level input compatibility (VIH = 3.85 V at VCC = 5.5 V), 14-pin TSSOP package, -40 °C to +125 °C operating range, and propagation delay as low as 3.3 ns (VCC = 4.5–5.5 V, CL = 15 pF). It is used in industrial control backplanes and mixed-voltage I/O interfacing.

For engineers reviewing the 74AHC126PW,112 datasheet, 74AHC126PW,112 pinout, 74AHC126PW,112 application, or 74AHC126PW,112 equivalent, key selection criteria include 3-state enable timing (ten ≤ 7.1 ns), overvoltage-tolerant inputs (VI up to 7.0 V), Schmitt-trigger input hysteresis, and thermal performance in TSSOP14 (derating starts at 81 °C).

Technical Context

This device implements four independent non-inverting buffers, each with an active-HIGH output enable (nOE) controlling high-impedance state. All inputs tolerate voltages beyond VCC (up to 7.0 V), enabling use as voltage translators between 3.3 V and 5 V domains without external level shifters.

Each channel supports rail-to-rail output swing (VOH ≥ 3.94 V, VOL ≤ 0.36 V at IO = ±8 mA, VCC = 4.5 V), exhibits balanced tPLH/tPHL propagation delays, and integrates ESD protection exceeding 2000 V HBM and 1000 V CDM - critical for board-level robustness in noisy industrial environments.

Key Specifications

Pinout & Package

TSSOP14 plastic thin shrink small outline package (SOT402-1); 14-lead, 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 buffer/line driver applications.

Compared with 74AHC126PW,112, the 74AHCT126PW,112 offers easier interfacing with legacy 5 V logic but sacrifices overvoltage tolerance, while the SN74LVC126APW delivers superior speed and quiescent current in 3.3 V-only systems but cannot replace it in mixed-voltage translation roles.

Availability

74AHC126PW,112 is available at Aetrix Electronics and suitable for industrial automation backplanes, automotive body control modules, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74AHC126PW,112 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, reliable logic, analog, and MOSFET solutions optimized for efficiency, miniaturization, and robustness in industrial and automotive applications.

The 74AHC series targets high-speed, low-power digital interfacing in mixed-voltage systems - emphasizing overvoltage tolerance, wide temperature operation, and ESD resilience for demanding real-world deployments.

FAQ

Is the 74AHC126PW,112 pin-compatible with the 74AHCT126PW,112?

Yes - both share identical TSSOP14 (SOT402-1) pinout, pin functions, and mechanical footprint. The only functional difference lies in input threshold levels: AHC requires CMOS-compatible VIH (≥3.85 V at VCC = 5.5 V), while AHCT accepts TTL-level VIH (≥2.0 V). No PCB redesign is needed for substitution, but verify driver VOH margins.

What is the maximum capacitive load the 74AHC126PW,112 can drive while maintaining specified timing?

The datasheet specifies timing parameters up to 50 pF load capacitance (CL), with tpd = 4.7 ns (max) at VCC = 4.5–5.5 V. Driving >50 pF increases propagation delay nonlinearly and may violate setup/hold margins. For >50 pF loads, add series termination or reduce trace length; output current remains within ±25 mA absolute maximum limit.

Does the 74AHC126PW,112 require external pull-up resistors on its 3-state outputs?

No - the outputs are actively driven HIGH or LOW when enabled, and enter true high-impedance (Z) state when disabled. Pull-ups are unnecessary unless a defined default state is required during power-up or OE assertion. If used, keep values ≥10 kΩ to avoid loading the output stage during active drive.

Can the 74AHC126PW,112 safely interface a 5 V microcontroller GPIO to a 3.3 V FPGA I/O bank?

Yes - its overvoltage-tolerant inputs accept 5 V signals while powered from 3.3 V VCC, and its outputs swing rail-to-rail (0–3.3 V), matching FPGA I/O voltage levels. Ensure the FPGA I/O bank is configured for 3.3 V LVTTL/LVCMOS input thresholds and that no internal 5 V-tolerant clamps conflict with the buffer's output drive capability.