onsemi NC7WZU04L6X

Overview

NC7WZU04L6X from onsemi is a dual unbuffered inverter in MicroPak-6 leadless package, designed for crystal oscillator and analog applications where single-stage gain and linear-region operation are required. It operates from 1.65 V to 5.5 V, delivers ±32 mA output drive at 4.5 V, and features high-impedance inputs at V_CC = 0 V with 5.5 V input tolerance.

For engineers reviewing the NC7WZU04L6X datasheet, pinout, applications, or equivalent options, key selection considerations include unbuffered topology for oscillator feedback loops, broad supply voltage range, low quiescent current (<1 µA at 5 V), and MicroPak-6 thermal performance (θ_JA = 154 °C/W).

Technical Context

The NC7WZU04L6X implements two independent unbuffered CMOS inverters-each consisting of a single complementary transistor pair-enabling direct use in Pierce or Colpitts oscillator topologies without added propagation delay or phase inversion stages. Its output stage supports simultaneous conduction in the linear region, requiring thermal derating per ICCPEAK limits during sustained analog operation.

Input structure includes ESD protection diodes rated for ±50 mA reverse/forward current, and inputs remain high-impedance with V_CC = 0 V, supporting hot-swap and partial-power-down system architectures. The device meets RoHS, Pb-free, and halogen-free requirements per onsemi's manufacturing standards.

Key Specifications

Pinout & Package

NC7WZU04L6X uses the MicroPak-6 (SIP6 1.45×1.0 mm) leadless package, featuring bottom-side solder pads and no exposed leads. Thermal pad is not present; thermal path relies on copper area under package body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual unbuffered inverter applications.

Compared with NC7WZU04P6X, NC7WZU04L6X offers superior thermal performance and space savings but requires compatible MicroPak reflow profile; compared with SN74LVC2GU04DBVR, it uniquely supports linear-mode oscillator design due to its unbuffered architecture and lower delay.

Availability

NC7WZU04L6X is available at Aetrix Electronics and suitable for crystal oscillator circuits, low-power RTC modules, analog signal inversion stages, and level-shifted logic interfaces requiring stable component supply and long-term manufacturability.

Supply support for NC7WZU04L6X 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 ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The TinyLogic UHS family-including NC7WZU04L6X-is engineered for ultra-high-speed, low-power logic in space-constrained systems, with emphasis on oscillator stability, mixed-voltage interoperability, and robustness in partial-power-down environments.

FAQ

What is the primary circuit role of the NC7WZU04L6X in oscillator designs?

The NC7WZU04L6X serves as the gain element in Pierce and Colpitts crystal oscillator circuits. Its unbuffered, single-stage CMOS inverter topology provides precise phase shift and controllable loop gain without added propagation delay-critical for stable 32.768 kHz or MHz-range crystal oscillation. The NC7WZU04L6X must be biased externally with feedback resistors and load capacitors to operate reliably in the linear region.

Can the NC7WZU04L6X be used with a 1.8 V supply while interfacing to 5 V signals?

Yes. The NC7WZU04L6X supports V_CC as low as 1.65 V and tolerates input voltages up to 5.5 V regardless of supply level. When powered at 1.8 V, its inputs safely accept 5 V logic signals without damage or level-shifting components-making the NC7WZU04L6X ideal for bridging legacy 5 V peripherals to modern low-voltage microcontrollers.

How does the MicroPak-6 package of the NC7WZU04L6X affect thermal design?

The MicroPak-6 package gives the NC7WZU04L6X a θ_JA of 154 °C/W-significantly lower than the SC-88 variant's 377 °C/W. This allows higher sustained power dissipation during linear-mode operation (e.g., oscillator startup or analog inversion), but requires strict adherence to IPC-7095B reflow profiles and adequate PCB copper area under the package for heat spreading. The NC7WZU04L6X has no thermal pad; conduction occurs through solder joints and package body.

Is the NC7WZU04L6X suitable for analog signal inversion outside oscillator circuits?

Yes-the NC7WZU04L6X is explicitly characterized for linear-region operation. When biased with appropriate external resistors, it functions as a rail-to-rail analog inverter with matched rise/fall response and ±32 mA drive capability. However, designers must observe the ICCPEAK limit and derate power based on duty cycle and ambient temperature to avoid thermal runaway. This analog use case is validated in the NC7WZU04L6X datasheet application note.

What are the critical layout guidelines for the NC7WZU04L6X in crystal oscillator applications?

For reliable NC7WZU04L6X oscillator performance: (1) place 0.1 µF ceramic bypass capacitor within 2 mm of V_CC and GND pins; (2) route crystal traces as short and symmetrical as possible with ground guard ring; (3) avoid routing digital noise sources near A1/Y1 or A2/Y2 nodes; (4) use dedicated ground plane under the NC7WZU04L6X MicroPak-6 body; (5) ensure unused input (A1 or A2) is tied to V_CC or GND-not left floating.