STMicroelectronics 74LX1G86STR

Overview

74LX1G86STR from STMicroelectronics is a single 2-input XOR gate in SOT23-5L 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 74LX1G86STR datasheet, 74LX1G86STR pinout, 74LX1G86STR application, or 74LX1G86STR equivalent, key selection criteria include voltage translation capability, low quiescent current (1µA max), symmetrical output drive, power-down protection, and operation across industrial temperature range (–55°C to +125°C).

Technical Context

This device implements a CMOS-based exclusive-OR logic function using sub-micron C2MOS technology, supporting rail-to-rail input voltage acceptance (–0.5V to +7V) independent of VCC. Its power-down protection ensures safe I/O behavior when VCC = 0V.

The gate delivers balanced propagation delays (tPLH ≅ tPHL), symmetrical output impedance (|IOH| = |IOL| ≥ 24mA at 3V), and operates with guaranteed truth table functionality from 1.2V to 3.6V - critical for low-voltage battery-powered and multi-rail interface designs.

Key Specifications

Pinout & Package

SOT23-5L surface-mount package (3.0 × 2.8 × 1.3 mm), 5-pin configuration with exposed pad not present; compatible with standard reflow profiles and automated pick-and-place.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G86DBVR and NC7SZ86P5X, the 74LX1G86STR uniquely combines 5V input tolerance, 1µA max ICC, and SOT23-5L manufacturability - making it optimal for cost-sensitive, mixed-voltage industrial interfaces requiring long-term supply stability.

Availability

74LX1G86STR is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics, and portable medical devices requiring stable component supply across extended temperature and voltage ranges.

Supply support for 74LX1G86STR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

The 74LX series targets low-voltage, high-speed logic interfacing in space-constrained and power-sensitive applications, emphasizing robustness across wide supply and temperature ranges.

FAQ

Can 74LX1G86STR operate with VCC = 1.65V while accepting 5V inputs?

Yes. The device guarantees full functionality at VCC = 1.65V and supports DC input voltages from –0.5V to +7.0V regardless of supply state - enabling true 5V-tolerant operation even during brown-out or power-down conditions.

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

At VCC = 3.3V, the 74LX1G86STR maintains specified tPLH/tPHL ≤4.8ns with CL = 50pF and RL = 500Ω. For heavier loads (>100pF), propagation delay increases linearly; design margin requires derating to ≤30pF for sub-5ns timing-critical paths.

Does this device support hot-swap insertion when VCC is unpowered?

Yes. Power-down protection on all pins prevents back-current flow and latch-up when VCC = 0V, allowing safe application of input signals prior to power-up - a requirement verified per JEDEC JESD78 latch-up test conditions.

How does its symmetrical output drive improve timing predictability?

Symmetrical |IOH| = |IOL| ≥24mA at 3V ensures matched rise/fall times under identical load conditions, minimizing duty-cycle distortion in XOR-based clock dividers, phase detectors, and PWM generators used in motor control and RF modulation circuits.