STMicroelectronics 74LX1G08STR

Overview

74LX1G08STR from STMicroelectronics is a low-voltage CMOS single 2-input AND gate with 5V-tolerant inputs, operating from 1.65 V to 5.5 V, delivering 4.5 ns max propagation delay at 3 V, ±24 mA output drive, and 1 µA max quiescent current - used in level-shifting logic interfaces within mixed-voltage digital systems.

For engineers reviewing the 74LX1G08STR datasheet, 74LX1G08STR pinout, 74LX1G08STR application, or 74LX1G08STR equivalent, key selection criteria include input voltage tolerance (0–7 V), symmetrical output drive (|IOH| = IOL ≥ 24 mA @ 3 V), wide VCC range (1.65–5.5 V), power-down protection, and SOT23-5L package compatibility.

Technical Context

This device implements a buffered 2-input AND function using sub-micron C2MOS technology with three-stage internal logic, enabling high noise immunity and stable rail-to-rail output swing. Its input structure accepts voltages up to 7 V regardless of VCC, supporting safe interfacing between 3.3 V and 5 V domains.

The output stage provides symmetrical sourcing/sinking capability (≥24 mA @ 3 V) and balanced tPLH/tPHL delays, while built-in power-down protection prevents back-driving damage when VCC = 0 V. Input leakage remains ≤±10 µA across full operating temperature (–55 °C to +125 °C).

Key Specifications

Pinout & Package

SOT23-5L surface-mount package (3.0 × 1.75 × 1.3 mm), 5-terminal leadframe with exposed pad not present; RoHS-compliant, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 2-input AND gate applications.

Compared with SN74LVC1G08DBVR and NC7SZ08P5X, the 74LX1G08STR uniquely combines 5 V input tolerance, power-down protection, and –55 °C to +125 °C operation - making it the only option for robust mixed-voltage industrial and automotive control logic requiring fail-safe behavior during supply transients.

Availability

74LX1G08STR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, USB-C power delivery controllers, and low-power wireless sensor nodes requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LX1G08STR 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-noise-immunity logic applications in mixed-supply systems - emphasizing interoperability, power efficiency, and ruggedness across diverse operating conditions.

FAQ

Can 74LX1G08STR be used with a 1.8 V supply and 5 V inputs?

Yes. The device operates from 1.65 V to 5.5 V and accepts input voltages from –0.5 V to +7.0 V regardless of VCC. At 1.8 V supply, inputs up to 5 V are safely clamped internally, enabling direct interface with legacy 5 V peripherals without external components.

Does 74LX1G08STR support hot-swap when VCC is unpowered?

Yes. Its power-down protection ensures no current flows into or out of inputs or outputs when VCC = 0 V. Inputs tolerate –0.5 V to +7.0 V, and outputs remain high-impedance, preventing back-powering or latch-up during hot-insertion into live backplanes.

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

At VCC = 3.3 V, the device drives up to 50 pF with tPD ≤ 4.2 ns (max) and maintains VOH ≥ 2.4 V / VOL ≤ 0.4 V at 16 mA load. For heavier loads (>50 pF), propagation delay increases linearly; layout decoupling and short traces are recommended to preserve timing integrity.

Is the SOT23-5L package of 74LX1G08STR pin-compatible with other single-gate logic devices?

Yes - the SOT23-5L pinout (1A, 1B, GND, 1Y, VCC) matches industry-standard single-gate logic packages including SN74LVC1G08, NC7SZ08, and 74AUP1G08. This enables drop-in replacement in existing layouts where electrical specs align with design requirements.