onsemi NC7SU04L6X

Overview

NC7SU04L6X from ON Semiconductor is a single unbuffered CMOS inverter optimized for crystal oscillator circuits, not logic inversion. It operates across 2V–6V supply, draws <1 µA quiescent current, delivers ±2 mA balanced output drive, and features 6-pin MicroPak packaging for ultra-compact timing applications in portable RF modules and IoT sensor nodes.

For engineers reviewing the NC7SU04L6X datasheet, pinout, applications, or equivalent options, this page provides verified package mapping, oscillator-specific electrical behavior, absolute maximum ratings, thermal resistance data, and confirmed alternative options for crystal buffer design.

Technical Context

The NC7SU04L6X implements a single-stage unbuffered inverter topology with no internal gain staging-enabling direct integration into Pierce oscillator configurations where phase shift and loop gain must be precisely controlled. Its input and output are inherently high-impedance at DC, with ESD protection diodes tied to VCC and GND rails.

It is specified for operation from −40°C to +85°C ambient, supports 2V–6V VCC, and exhibits propagation delays as low as 6.5 ns (tPLH/tPHL) at 6V with 15 pF load. Input capacitance is 10 pF max; power dissipation capacitance is 4 pF at 5V.

Key Specifications

Pinout & Package

NC7SU04L6X is housed in a 6-lead MicroPak™ leadless package (Package Code MAC06A), 1.0 mm wide, with bottom-side thermal pad and no exposed leads. The package requires solder paste stencil optimization and reflow profile validation for void-free assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G04DBVR and 74AUP1G04GW,125, the NC7SU04L6X uniquely combines unbuffered architecture, 2–6V operation, 6-pin MicroPak isolation, and sub-1 µA ICC-making it the only option qualified for high-stability, wide-voltage, space-constrained crystal oscillator designs.

Availability

NC7SU04L6X is available at Aetrix Electronics and suitable for wearable sensor timing, BLE module clocking, industrial sleep timers, smart meter RTC backup, and other applications requiring stable component supply with guaranteed long-term sourcing.

Supply support for NC7SU04L6X 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

ON Semiconductor (formerly Fairchild Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, signal conditioning, and timing solutions for automotive, industrial, and portable electronics.

The NC7SU04L6X belongs to the TinyLogic® HS family-designed specifically for ultra-small, low-power, high-speed logic functions in space- and power-constrained timing and interface circuits.

FAQ

What is the primary function of the NC7SU04L6X?

The NC7SU04L6X is a single unbuffered CMOS inverter engineered exclusively for crystal oscillator circuits-not general-purpose logic inversion. Its unbuffered design provides precise phase shift and gain control in Pierce oscillator configurations, with confirmed use in 32.768 kHz and fundamental-mode MHz crystal applications. The NC7SU04L6X achieves this through low input capacitance (10 pF max), balanced ±2 mA output drive, and sub-1 µA quiescent current.

Why does the NC7SU04L6X have two NC pins?

The NC7SU04L6X uses a 6-pin MicroPak package (MAC06A) with two No Connect terminals (Pins 2 and 6) to maintain mechanical symmetry, improve thermal distribution, and reduce parasitic coupling in high-frequency oscillator layouts. These pins are internally unconnected and must remain un-routed and un-soldered on the PCB-doing so preserves signal integrity and avoids unintended resonance or ESD path disruption in the NC7SU04L6X oscillator loop.

Can the NC7SU04L6X operate at 1.8V?

No-the NC7SU04L6X is not rated for 1.8V operation. Its absolute minimum VCC is 2.0V, and recommended operating range is strictly 2.0V–6.0V per the official datasheet. Attempting 1.8V operation risks failure to oscillate, increased jitter, or undefined logic thresholds. For 1.8V crystal oscillator designs, consider alternatives like the 74AUP1G04, which specifies 0.8V–3.6V operation-but verify oscillator suitability separately.

What is the thermal resistance (θJA) of the NC7SU04L6X?

The NC7SU04L6X does not have a published θJA value because its 6-pin MicroPak package (MAC06A) lacks standardized JEDEC test conditions for thermal characterization. Unlike SOT23-5 (θJA = 300°C/W) or SC70-5 (θJA = 425°C/W), the NC7SU04L6X relies on PCB copper area for heat dissipation. Designers must implement ≥25 mm² of 1-oz copper connected to the thermal pad under the NC7SU04L6X body to ensure safe junction temperature under continuous operation.

Is the NC7SU04L6X pin-compatible with NC7SU04M5X or NC7SU04P5X?

No-the NC7SU04L6X is not pin-compatible with NC7SU04M5X (SOT23-5) or NC7SU04P5X (SC70-5). It uses a distinct 6-pin MicroPak footprint (MAC06A) with different pin count, spacing, and terminal arrangement-including two NC pins absent in the 5-pin variants. PCB layout, stencil design, and reflow profile must be independently validated for the NC7SU04L6X; no mechanical or electrical drop-in replacement is possible.