onsemi NC7WV125K8X

Overview

NC7WV125K8X from onsemi (formerly Fairchild) is a dual 3-STATE buffer IC in the TinyLogic® ULP-A family, designed for low-voltage signal routing and bus isolation in portable and battery-powered systems. It operates from 0.9V to 3.6V V_CC, delivers ±24 mA drive at 3.0V, and achieves 1.0 ns typical propagation delay (2.7–3.6V), enabling high-speed logic interfacing in space-constrained applications.

For engineers reviewing the NC7WV125K8X datasheet, pinout, applications, or equivalent options, key selection considerations include its ultra-low-power operation across sub-1.2V supply rails, over-voltage tolerant I/Os (3.6V with V_CC as low as 0.9V), power-off high-impedance behavior, and US8 package compatibility with fine-pitch PCB layouts.

Technical Context

The NC7WV125K8X implements two independent non-inverting buffers, each with active-low 3-STATE enable (OE), supporting bidirectional bus control and load isolation. Its advanced CMOS process enables simultaneous high speed and ultra-low dynamic/static power-quiescent current is just 0.9 µA, and CPD is 12 pF.

All inputs and outputs are over-voltage tolerant to 3.6V regardless of V_CC (0.9–3.6V), and inputs remain high-impedance with V_CC = 0V. Propagation delay scales predictably with supply voltage: 13 ns at 0.9V, 6.0 ns at 1.1–1.3V, and 1.0 ns at 2.7–3.6V (CL = 15 pF).

Key Specifications

Pinout & Package

NC7WV125K8X is housed in an 8-lead US8 package (JEDEC MO-187, Variation CA), 3.1 mm wide, Pb-free, with exposed pad not connected. Pin 1 is located at the lower-left corner when reading top mark "WV25" left-to-right.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 3-STATE buffer applications.

Compared with NC7WV125K8X, NC7WZ125K8X trades 0.9V operation and 3.6V I/O tolerance for slightly lower cost, while SN74LVC2G125DBVR offers broader industry familiarity but lacks true sub-1.2V functionality and power-off safety-making NC7WV125K8X uniquely suited for extreme low-voltage, battery-critical designs.

Availability

NC7WV125K8X is available at Aetrix Electronics and suitable for mobile device power management, low-power sensor interface, wearable system bus arbitration, and IoT edge node subsystem enable requiring stable component supply despite end-of-life status.

Supply support for NC7WV125K8X 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

onsemi (formerly Fairchild Semiconductor) is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.

The NC7WV125K8X belongs to the TinyLogic® ULP-A family-designed specifically for ultra-low-voltage, high-speed logic in portable and battery-constrained systems where sub-1V operation and minimal dynamic power are critical.

FAQ

Is NC7WV125K8X still in production?

No-NC7WV125K8X is discontinued and not recommended for new designs per the official onsemi datasheet. However, Aetrix Electronics maintains limited legacy inventory and supports existing production programs with traceable, date-code-controlled stock and lifecycle coordination services for NC7WV125K8X.

What is the maximum operating frequency supported by NC7WV125K8X?

The NC7WV125K8X does not specify a maximum clock frequency in its datasheet, but its 1.0 ns typical propagation delay (at 3.0V, CL = 15 pF) supports clean signal toggling up to approximately 350 MHz in ideal conditions. Real-world maximum frequency depends on load capacitance, trace impedance, and supply stability-design validation is required per application.

Can NC7WV125K8X be used with a 1.0V supply rail?

Yes-NC7WV125K8X is fully specified down to 0.9V V_CC. At 1.0V, it delivers 6.0 ns typical propagation delay and ±2 mA drive strength, making it suitable for ultra-low-power subsystems such as energy-harvesting sensors or backup power domains where NC7WV125K8X maintains functional logic levels and timing margins.

Does NC7WV125K8X require external pull-up or pull-down resistors on its OE pins?

No-NC7WV125K8X OE inputs have no internal pull resistors, but they exhibit negligible leakage (±0.5 µA) and are compatible with direct connection to CMOS logic outputs. External resistors are only needed if driving OE from an open-drain source or to ensure defined state during power-up; NC7WV125K8X itself does not mandate them.

How does the Quiet Series™ feature affect PCB layout for NC7WV125K8X?

The Quiet Series™ circuitry in NC7WV125K8X reduces edge slew rates to suppress EMI, so aggressive signal integrity measures (e.g., series termination, controlled impedance routing) are less critical than with standard logic buffers. However, NC7WV125K8X still benefits from short traces, solid ground planes, and local V_CC decoupling (0.1 µF ceramic near Pin 8) to maintain its sub-2 ns timing performance and low-noise operation.