STMicroelectronics 74LX1G02CTR

Overview

74LX1G02CTR from STMicroelectronics is a single 2-input NOR gate logic IC in SOT323-5L package, operating from 1.65V to 5.5V supply, with 4.2ns max propagation delay at 3V, ±24mA output drive, and 5V-tolerant inputs enabling 5V-to-3V level translation in mixed-voltage digital interfaces.

For engineers reviewing the 74LX1G02CTR datasheet, 74LX1G02CTR pinout, 74LX1G02CTR application, or 74LX1G02CTR equivalent, key selection criteria include input voltage tolerance, symmetrical output drive strength, power-down protection, low quiescent current (1µA max), and guaranteed truth table operation down to 1.2V data retention.

Technical Context

This device implements a CMOS NOR gate using sub-micron C2MOS technology with three-stage buffered output for high noise immunity and stable switching. Its input structure accepts 0–7V regardless of VCC, enabling robust interfacing across voltage domains.

The internal design includes diode-based ESD protection on all pins, power-down protection that prevents back-driving when VCC = 0V, and symmetrical output impedance (|IOH| = |IOL| ≥ 24mA at 3V), ensuring balanced rise/fall times and minimal skew (tPLH ≅ tPHL).

Key Specifications

Pinout & Package

SOT323-5L: ultra-small surface-mount package (1.80 × 2.20 × 0.95 mm), 5-pin, lead-free, tape-and-reel compatible.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single 2-input NOR gate applications.

Compared with SN74LVC1G02DBVR and NC7SZ02P5X, the 74LX1G02CTR uniquely supports 0–7V input tolerance with VCC = 0V, making it irreplaceable in mixed-voltage fail-safe interfaces where back-driving or floating supply conditions occur.

Availability

74LX1G02CTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, USB-C power delivery control, and automotive body control modules requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LX1G02CTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management solutions with broad analog, digital, and mixed-signal product portfolios.

The 74LX series targets low-voltage, high-speed logic interoperability-designed specifically for voltage translation, bus isolation, and interface bridging in multi-rail embedded systems.

FAQ

Can 74LX1G02CTR be used with VCC = 0V while inputs are at 5V?

Yes. The device features power-down protection: inputs and outputs tolerate 0–7V regardless of VCC state, including VCC = 0V. This prevents latch-up and back-current flow, enabling safe hot-plug or partial-power-down scenarios in modular systems.

What is the minimum VCC required for guaranteed logic operation?

The truth table is guaranteed from VCC = 1.2V (data retention) up to 5.5V, but functional operation with full timing and drive specifications requires VCC ≥ 1.65V per recommended operating conditions. Below 1.65V, propagation delay and output current degrade progressively.

Does 74LX1G02CTR support 1.8V logic systems?

Yes. At VCC = 1.8V, it delivers ≥4mA output drive, VIH/VIL thresholds scale to 0.75×VCC and 0.25×VCC respectively, and tPD remains ≤7.0ns (CL = 15pF), meeting timing requirements for 1.8V FPGA/CPLD interface and low-power microcontroller peripherals.

How does its ESD protection compare to standard CMOS logic?

All inputs and outputs integrate dedicated protection diodes rated to ±50mA DC and tested to >2kV HBM per JESD22-A114. This exceeds typical CMOS gates and aligns with industrial IEC 61000-4-2 Level 3 requirements, reducing need for external TVS components in board-level ESD mitigation.