onsemi NC7ST02P5

Overview

NC7ST02P5 from onsemi is a single 2-input high-performance CMOS NOR gate with TTL-compatible inputs, designed for level translation and logic interfacing in space-constrained digital systems. It operates from 4.5 V to 5.5 V, delivers balanced ±2 mA output drive, achieves <7 ns typical propagation delay at 5 V/15 pF, and is housed in the SC-88A (SOT-353) 5-lead package.

For engineers reviewing the NC7ST02P5 datasheet, pinout, applications, or equivalent options, key selection criteria include its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max), low quiescent ICC (<1 µA typ at 5.5 V), and SC-88A footprint compatibility with legacy SOT-23-5 logic gates in high-density PCB layouts.

Technical Context

The NC7ST02P5 implements a standard positive-logic NOR function (Y = A + B) using advanced silicon-gate CMOS technology, enabling TTL-to-CMOS interfacing without external level shifters. Its high-gain circuitry provides strong noise immunity and reduced sensitivity to input edge rate variations.

ESD protection diodes are integrated on all I/O pins relative to VCC and GND rails, and unused inputs must be actively driven HIGH or LOW - floating inputs are prohibited per design specification. The device is rated for operation from −40 °C to +85 °C with thermal resistance of 377 °C/W in SC-88A packaging.

Key Specifications

Pinout & Package

NC7ST02P5 is packaged in SC-88A (also known as SC-70-5 or SOT-353), a 5-lead surface-mount package measuring 2.0 mm × 1.25 mm × 0.95 mm with 0.65 mm pitch. Pin 1 is marked by a dot or notch orientation; the package is leadless on bottom and features gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NC7ST02P5, the 74AHC1G02GW,125 offers faster propagation and wider supply tolerance in the same SC-88A package, while SN74LVC1G02DBVR trades 5 V compatibility for ultra-small size and higher drive - making it suitable only in 3.3 V–dominant designs.

Availability

NC7ST02P5 is available at Aetrix Electronics and suitable for industrial control logic, power sequencing enable circuits, and USB peripheral interface designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for NC7ST02P5 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The NC7ST02P5 belongs to the TinyLogic HST family - a series of ultra-small, high-speed CMOS logic gates optimized for space-constrained, low-power digital interfacing in industrial and embedded systems.

FAQ

What is the absolute maximum supply voltage rating for NC7ST02P5?

The NC7ST02P5 has an absolute maximum VCC rating of −0.5 V to +6.5 V. Exceeding +6.5 V risks permanent damage to internal CMOS structures and ESD diodes. For reliable operation, the datasheet specifies a recommended range of 4.5 V to 5.5 V - staying within this window ensures compliance with AC/DC electrical characteristics and thermal limits in the SC-88A package.

Does NC7ST02P5 support operation at 3.3 V supply?

No, NC7ST02P5 is not characterized or guaranteed for operation at 3.3 V. Its recommended operating conditions specify VCC = 4.5 V to 5.5 V, and DC/AC parameters (e.g., VIH = 2.0 V min, tPD < 7 ns) are only validated within that range. Using NC7ST02P5 at 3.3 V may result in marginal noise margins, increased propagation delay, or functional failure.

Is NC7ST02P5 pin-compatible with other SC-88A logic gates like NC7SZ02?

Yes, NC7ST02P5 shares the same SC-88A pinout (A-B-GND-Y-VCC) with NC7SZ02 and other onsemi TinyLogic single-gate devices in that package. However, NC7SZ02 uses different input thresholds and drive strength; substituting it for NC7ST02P5 requires verifying VIH/VIL compatibility and load-driving capability in the target circuit.

What does the "T02" top mark on NC7ST02P5 indicate?

The "T02" marking on NC7ST02P5 is the device-specific code assigned by onsemi to identify the NC7ST02 logic function in SC-88A packaging. It appears alongside a 2-digit lot code and date code on the top surface, and is used for traceability and quality control - not to denote variant, revision, or temperature grade.

Can unused inputs on NC7ST02P5 be left floating?

No - unused inputs on NC7ST02P5 must never be left floating. The datasheet explicitly states that all inputs must be actively driven HIGH or LOW. Floating inputs can cause excessive ICC, erratic output behavior, or latch-up due to undefined internal node voltages, violating both functional and absolute maximum ratings.