Nexperia USA Inc. 74VHC125PW,118

Overview

74VHC125PW,118 from Nexperia is a quad non-inverting 3-state buffer/line driver in TSSOP14 package, operating from 2.0 V to 5.5 V, with propagation delay as low as 3.0 ns (VCC = 5.0 V, CL = 15 pF), balanced tPLH/tPHL timing, and TTL-compatible input thresholds when used as 74VHCT125 variant. It serves in bus interface isolation, data routing, and level translation between mixed-voltage logic domains in industrial control and embedded communication subsystems.

For engineers reviewing the 74VHC125PW,118 datasheet, 74VHC125PW,118 pinout, 74VHC125PW,118 application, or 74VHC125PW,118 equivalent, key selection criteria include guaranteed 3-state output leakage (< ±10 µA at -40 °C to +125 °C), Schmitt-trigger input hysteresis for noise immunity, input overvoltage tolerance beyond VCC, and JEDEC JESD7-A compliance for LSTTL pin compatibility.

Technical Context

This device implements four independent CMOS buffer channels, each with active-low 3-state enable (nOE) controlling high-impedance output (Z-state) independently per channel. Its Si-gate CMOS process ensures rail-to-rail output swing and static current < 40 µA at VCC = 5.5 V across full temperature range.

The logic function follows standard truth table: nOE = LOW enables pass-through (nY = nA); nOE = HIGH forces nY to high-impedance. Input clamping diodes support VI up to +7.0 V, and outputs tolerate VO from -0.5 V to VCC + 0.5 V under clamp-current limits.

Key Specifications

Pinout & Package

TSSOP14 (SOT402-1) package: plastic thin shrink small outline, 14 leads, body width 4.4 mm, 0.65 mm pitch, exposed pad optional, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74VHC125PW,118, the SO14 variant offers easier handling but larger footprint and higher thermal resistance, while the SN74LVC125APWR reduces supply voltage flexibility and eliminates TTL compatibility-making the 74VHC125PW,118 optimal for mixed-voltage, high-reliability industrial use.

Availability

74VHC125PW,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC125PW,118 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 industrial and automotive applications.

The 74VHC/VHCT logic family targets pin-compatible upgrades of legacy TTL systems with CMOS power efficiency and enhanced noise immunity-designed specifically for bus interface, signal routing, and voltage-level adaptation in harsh-environment electronics.

FAQ

What is the maximum clock frequency supported by 74VHC125PW,118 in a bus application?

The device supports reliable operation up to 100 MHz in typical 50 pF loaded bus configurations, based on worst-case propagation delay of 9.5 ns at -40 °C to +125 °C and VCC = 4.5 V. For sustained 100 MHz toggling, ensure layout minimizes trace inductance and uses local 100 nF decoupling at VCC/GND pins.

Can 74VHC125PW,118 safely interface a 5 V microcontroller output to a 3.3 V FPGA input?

Yes - its inputs tolerate VI up to +7.0 V regardless of VCC, and its outputs swing rail-to-rail (0 V to VCC). With VCC = 3.3 V, it delivers 3.3 V logic levels compatible with FPGA I/O banks, while accepting 5 V MCU signals directly without external components.

Does 74VHC125PW,118 require external pull-up or pull-down resistors on its 3-state outputs?

No - the high-impedance state exhibits leakage < ±10 µA at +125 °C, making external biasing unnecessary in most applications. However, if bus idle-state logic level must be strictly defined (e.g., avoid floating inputs on downstream receivers), a 10 kΩ pull-up/down is recommended.

How does the Schmitt-trigger input improve noise immunity compared to standard CMOS inputs?

Its input hysteresis (≥0.3 V at VCC = 3.3 V) creates two distinct threshold voltages: VIH ≈ 1.5 V and VIL ≈ 1.2 V. This prevents multiple transitions during slow or noisy signal edges, eliminating glitches caused by EMI, crosstalk, or undershoot on long PCB traces or cables.