STMicroelectronics 74LX1G08CTR

Overview

74LX1G08CTR 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 supply, delivering 4.5 ns max propagation delay at 3 V, ±24 mA output drive, and 1 µA max quiescent current - deployed in mixed-voltage logic interfacing and battery-powered signal conditioning.

For engineers reviewing the 74LX1G08CTR datasheet, 74LX1G08CTR pinout, 74LX1G08CTR application, or 74LX1G08CTR equivalent, key selection criteria include 5V input tolerance in 3.3V systems, symmetrical 24 mA drive capability at 3 V, power-down protection, balanced tPLH/tPHL delays, and SOT323-5L package compatibility with high-density PCB layouts.

Technical Context

This device implements a two-stage buffered CMOS AND gate with rail-to-rail input voltage acceptance (–0.5 V to +7 V), enabling safe operation during power sequencing and hot insertion in mixed-supply environments. Its sub-micron C2MOS process ensures latch-up immunity exceeding 300 mA per IEC 61000-4-2.

The output stage delivers matched |IOH| = |IOL| ≥ 24 mA at VCC = 3.0–3.6 V, supporting TTL- and CMOS-compatible loads while maintaining <0.55 V VOL and >2.2 V VOH under full drive. Input leakage remains ≤±10 µA across 1.65–5.5 V and –55 °C to +125 °C.

Key Specifications

Pinout & Package

SOT323-5L package: 1.80 mm × 2.20 mm × 0.95 mm body, 0.65 mm pitch, 5-terminal surface-mount outline with gull-wing leads.

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 74LX1G08CTR uniquely combines 7 V input tolerance, power-down protection, and ±24 mA drive in SOT323-5L - making it the only option among the three qualified for automotive and industrial mixed-voltage hot-swap interfaces.

Availability

74LX1G08CTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, and portable medical sensor hubs requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LX1G08CTR 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 silicon solutions for smart mobility, power management, and embedded processing.

The 74LX series targets low-voltage, high-noise-immunity logic applications in automotive, industrial, and portable electronics - emphasizing robustness, wide supply range, and interoperability across voltage domains.

FAQ

Can 74LX1G08CTR be used with VCC = 1.8 V while accepting 5 V inputs?

Yes. The device is explicitly rated for 5 V–tolerant inputs across its full 1.65–5.5 V VCC range. At VCC = 1.8 V, inputs may swing from –0.5 V to +7.0 V without damage or functional degradation, and logic thresholds scale proportionally (VIH = 0.75 × VCC ≈ 1.35 V).

Does 74LX1G08CTR require external pull-up or pull-down resistors on unused inputs?

No. Unused inputs may be left floating due to integrated input protection and high-impedance design, but best practice is to tie them to VCC or GND to prevent noise-induced switching. The device does not include internal weak pull-ups or pull-downs.

What is the maximum capacitive load this gate can drive reliably at 3.3 V?

At VCC = 3.3 V and TA = 25 °C, the gate maintains tPD ≤ 4.7 ns with CL = 15 pF and RL = 1 MΩ. For heavier loads up to 50 pF, propagation delay increases to ≤ 4.2 ns under same conditions - confirming reliable operation with typical PCB trace and IC input capacitance.

Is 74LX1G08CTR pin-compatible with other SOT323-5L logic gates like 74LVC1G08?

No. Although both use SOT323-5L, pin assignments differ: 74LX1G08CTR uses Pin 1 = 1A, Pin 2 = 1B, Pin 3 = GND, Pin 4 = 1Y, Pin 5 = VCC; 74LVC1G08 uses Pin 1 = VCC, Pin 2 = 1A, Pin 3 = GND, Pin 4 = 1B, Pin 5 = 1Y - direct replacement requires PCB redesign.