STMicroelectronics 74LX1G86CTR

Overview

74LX1G86CTR from STMicroelectronics is a low-voltage CMOS single exclusive-OR (XOR) gate in SOT323-5L package, operating from 1.65V to 5.5V supply, with 5ns max propagation delay at 3V, ±24mA output drive, and 5V-tolerant inputs enabling 5V-to-3V logic interfacing in mixed-voltage systems.

For engineers reviewing the 74LX1G86CTR datasheet, 74LX1G86CTR pinout, 74LX1G86CTR application, or 74LX1G86CTR equivalent, key selection criteria include input voltage tolerance, symmetric output drive strength, power-down protection, wide VCC range, and guaranteed truth table operation down to 1.2V data retention.

Technical Context

This device implements a single 2-input XOR logic function using sub-micron C2MOS technology, with input and output protection circuits for ESD immunity and power-down safety. All inputs accept 0–7V regardless of VCC, enabling robust level translation without external circuitry.

Propagation delays are balanced (tPLH ≅ tPHL), and output impedance is symmetrical (|IOH| = IOL ≥ 24mA at VCC = 3V), ensuring consistent rise/fall timing in clocked or data-path applications across its full operating temperature range (–55°C to +125°C).

Key Specifications

Pinout & Package

SOT323-5L: 5-pin ultra-small surface-mount package (1.80 × 2.40 mm body, 0.65 mm pitch), optimized for space-constrained PCB layouts in portable and sensor-interface designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar XOR gate applications.

Compared with SN74LVC1G86DBVR and NC7SZ86P5X, the 74LX1G86CTR uniquely combines 7V input tolerance, 1.2V data retention, and –55°C to +125°C qualification-making it the only option for fail-safe mixed-voltage automotive or industrial hot-swap interfaces.

Availability

74LX1G86CTR is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control, and low-power IoT node designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74LX1G86CTR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LX series targets low-voltage, high-noise-immunity logic interfacing in harsh environments, emphasizing voltage tolerance, power-down safety, and extended temperature operation.

FAQ

Can 74LX1G86CTR operate with VCC = 1.65V while accepting 5V inputs?

Yes. The device guarantees full functionality at VCC = 1.65V and accepts DC input voltages from –0.5V to +7.0V on all inputs regardless of supply state, enabling true 5V-to-1.65V level translation without external components or risk of damage.

What is the maximum capacitive load this XOR gate can drive reliably?

At VCC = 3.0V, the 74LX1G86CTR drives up to 50pF with tPLH/tPHL ≤ 5ns (max) and maintains symmetrical output impedance. For loads >50pF, propagation delay increases linearly; design margin requires verification using the provided AC test conditions and CL/RL values.

Does this device support hot insertion when VCC is unpowered?

Yes. Power-down protection ensures that inputs and outputs remain high-impedance and non-latching when VCC = 0V, and the absolute maximum input rating of –0.5V to +7.0V permits safe connection of live 5V signals prior to power-up-critical for hot-swap backplane or modular system designs.

How does the 74LX1G86CTR compare to standard 74HC-series XOR gates?

Unlike 74HC86, the 74LX1G86CTR operates down to 1.65V, offers 7V input tolerance (vs. VCC+0.5V), consumes <1µA quiescent current (vs. ~2µA), and features built-in power-down protection. It replaces HC variants in modern low-voltage, mixed-rail, and automotive applications where robustness and efficiency are mandatory.