Nexperia USA Inc. 74AHC125PW,112

Overview

74AHC125PW,112 from Nexperia is a quad non-inverting 3-state buffer/line driver IC with CMOS-level input compatibility, operating from 2.0 V to 5.5 V supply, featuring overvoltage-tolerant inputs up to 5.5 V and propagation delay as low as 3.0 ns (VCC = 5.0 V, CL = 15 pF). It enables bidirectional bus isolation in mixed-voltage digital systems such as industrial PLC I/O modules, FPGA configuration interfaces, and microcontroller peripheral expansion.

For engineers reviewing the 74AHC125PW,112 datasheet, 74AHC125PW,112 pinout, 74AHC125PW,112 application, or 74AHC125PW,112 equivalent, this device serves as a voltage-translation-capable bus buffer with precise enable-controlled output impedance switching, Schmitt-trigger inputs for noise immunity, and guaranteed operation across -40 °C to +125 °C.

Technical Context

The 74AHC125PW,112 implements four independent non-inverting buffers, each with an active-low 3-state output enable (nOE) controlling high-impedance output release. Its CMOS input structure supports TTL-compatible thresholds only in the AHCT variant; this AHC version uses rail-to-rail CMOS logic levels and exhibits balanced tPLH/tPHL propagation delays.

Input pins tolerate up to 5.5 V regardless of VCC, enabling safe interfacing between 3.3 V logic domains and 5 V peripherals. Each buffer delivers ±8 mA drive strength at VCC = 4.5 V, with static VIH/VIL thresholds defined at 3.85 V (min) and 1.65 V (max) respectively under full VCC = 5.5 V operation.

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 3-state buffer applications.

Compared with 74AHCT125PW,112, the AHC variant offers superior noise margin in CMOS environments but lacks TTL input compatibility; versus SN74LVC125APW, it trades 5 V operation and wider voltage tolerance for slightly higher ICC and reduced drive strength.

Availability

74AHC125PW,112 is available at Aetrix Electronics and suitable for industrial bus isolation, FPGA configuration interfaces, microcontroller peripheral expansion, and automotive diagnostic interfaces requiring stable component supply across extended temperature ranges.

Supply support for 74AHC125PW,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.

The 74AHC125PW,112 belongs to Nexperia's AHC logic family, engineered for low-power, high-speed digital interfacing in industrial automation, automotive subsystems, and consumer electronics with stringent thermal and ESD requirements.

FAQ

What is the maximum clock frequency supported by the 74AHC125PW,112?

The 74AHC125PW,112 does not operate as a clocked device but as a combinatorial buffer. Its usable toggle rate depends on propagation delay and load capacitance: with 15 pF load and VCC = 5.0 V, tpd = 3.0 ns (typ), supporting reliable data edge rates up to ~160 MHz in point-to-point routing. System-level timing must account for PCB trace delays and fanout.

Can the 74AHC125PW,112 be used to translate between 3.3 V and 5 V logic domains?

Yes - its inputs tolerate up to 5.5 V regardless of VCC, allowing 5 V signals to safely drive the AHC125 when powered at 3.3 V. Outputs swing rail-to-rail (0 V to VCC), so 3.3 V outputs require external level shifting to interface with 5 V inputs unless those inputs are 3.3 V–tolerant.

Is the exposed thermal pad on the TSSOP14 package electrically connected?

No - the exposed pad on the SOT402-1 (TSSOP14) package is not electrically connected to any internal node. Nexperia documentation states it may remain floating or be soldered to GND for thermal improvement, but no electrical connection is required or implied.

How does the 74AHC125PW,112 handle input signals slower than the specified Δt/ΔV limit?

Inputs with rise/fall times exceeding 100 ns/V (e.g., >200 ns at VCC = 2.0 V) may cause metastability or increased propagation delay variation. The integrated Schmitt-trigger inputs mitigate this by providing hysteresis (~0.3 V at VCC = 5 V), ensuring clean transitions even for slow-moving control signals like hardware resets or manual switches.