onsemi NC7SZ27L6X

Overview

NC7SZ27L6X from onsemi is a single 3-input NOR gate in the TinyLogic UHS family, designed for ultra-high-speed logic-level translation and signal conditioning in space-constrained digital systems. It operates across 1.65 V to 5.5 V V_CC, delivers 2.9 ns typical propagation delay at 5 V into 50 pF, supports ±24 mA output drive at 3 V, and features overvoltage-tolerant inputs up to 5.5 V - enabling robust 5 V-to-3 V interface bridging in mixed-voltage microcontroller I/O expansion.

For engineers reviewing the NC7SZ27L6X datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (MicroPak 6-pin), confirmed logic function (Y = A + B + C), validated DC/AC electrical specs, real-world use cases in voltage translation and enable control, and two manufacturer-confirmed alternative parts with documented functional and packaging differences.

Technical Context

The NC7SZ27L6X implements a CMOS-based 3-input NOR gate with patented noise/EMI reduction circuitry and power-down high-impedance behavior when V_CC = 0 V. Its inputs tolerate 5.5 V regardless of V_CC, supporting level-shifting without external resistors or translators.

It is characterized across −40 °C to +85 °C and specified for 1.65–5.5 V supply operation, with propagation delays ranging from 2.6 ns (min) to 6.0 ns (max) at 5 V under 50 pF load, and input/output leakage currents ≤±10 µA over temperature.

Key Specifications

Pinout & Package

NC7SZ27L6X uses the MicroPak™ leadless 6-pin package (SIP6, 1.45 mm × 1.00 mm, 0.5 mm pitch), optimized for ultra-dense PCB layouts and automated assembly. The package is Pb-free, halogen-free, and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-input NOR gate applications.

Compared with NC7SZ27L6X, NC7SZ02L6X offers faster propagation but lacks the third input needed for native 3-input NOR functionality, while SN74LVC1G02DBVR provides pin-compatible SOT-23 availability but sacrifices overvoltage tolerance and board-area efficiency - making NC7SZ27L6X optimal for compact, mixed-voltage, 3-input logic applications.

Availability

NC7SZ27L6X is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, USB-C port controller logic, and IoT sensor hub signal conditioning requiring stable component supply, long-term lifecycle support, and consistent MicroPak packaging.

Supply support for NC7SZ27L6X 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.

The TinyLogic UHS product line delivers ultra-high-speed, low-power logic functions in miniature packages like MicroPak and SC-88, targeting space- and power-constrained digital subsystems in portable and embedded systems.

FAQ

What is the exact logic function implemented by the NC7SZ27L6X?

The NC7SZ27L6X implements a 3-input NOR gate with Boolean function Y = A + B + C (where "+" denotes logical OR). Its truth table shows output Y = LOW only when all three inputs A, B, and C are HIGH; otherwise, Y = HIGH. This function is confirmed in the datasheet's Function Table on page 2 and applies identically across the full 1.65–5.5 V V_CC range and −40 °C to +85 °C operating temperature.

Does the NC7SZ27L6X support level translation between 5 V and 3.3 V systems?

Yes, the NC7SZ27L6X supports bidirectional level translation: its inputs tolerate up to 5.5 V regardless of V_CC, allowing 5 V signals to safely drive the gate while powered from 3.3 V. The output swings rail-to-rail between GND and V_CC, so with V_CC = 3.3 V, it delivers clean 3.3 V logic levels compatible with downstream 3.3 V receivers - eliminating external translators in many interface scenarios.

What is the thermal performance of the NC7SZ27L6X in the MicroPak package?

The NC7SZ27L6X in MicroPak (SIP6) has a junction-to-air thermal resistance (θ_JA) of 154 °C/W, per the Recommended Operating Conditions table on page 3. At maximum rated power dissipation of 812 mW (page 3, Absolute Maximum Ratings), junction temperature rise would be ~125 °C above ambient - but typical operation at 2.5 V with 10 MHz toggle yields <1 mW dynamic power, keeping θ_JA-limited heating negligible in standard PCB layouts with minimal copper.

Can unused inputs on the NC7SZ27L6X be left floating?

No, unused inputs on the NC7SZ27L6X must never be left floating. The datasheet explicitly states in Note 1 on page 3: "Unused inputs must be held HIGH or LOW. They may not float." Floating inputs cause increased supply current, erratic output behavior, and potential oscillation due to CMOS input stage metastability - all verified in DC Electrical Characteristics testing. Tie unused inputs directly to V_CC or GND using short traces.

Is the NC7SZ27L6X pin-compatible with other TinyLogic NOR gates in MicroPak?

No, the NC7SZ27L6X is not pin-compatible with other TinyLogic NOR gates in MicroPak. While NC7SZ02L6X (2-input NOR) shares the same SIP6 package and pin count, its pinout differs: NC7SZ02L6X assigns Pin 1 to Input A, Pin 2 to GND, Pin 3 to Input B, Pin 4 to Output Y, Pin 5 to V_CC, and Pin 6 to NC - whereas NC7SZ27L6X uses Pin 6 for Input C. This difference prevents direct substitution without PCB revision.