STMicroelectronics 74LX1G32CTR

Overview

74LX1G32CTR from STMicroelectronics is a low-voltage CMOS single 2-input OR gate in SC70-5 package, operating from 1.65 V to 5.5 V with 5 V tolerant inputs, 4.7 ns max propagation delay at 3 V, ±24 mA output drive, and 1 µA max quiescent current - used in level-shifting logic interfaces in mixed-voltage embedded control systems.

For engineers reviewing the 74LX1G32CTR datasheet, 74LX1G32CTR pinout, 74LX1G32CTR application, or 74LX1G32CTR equivalent, key selection criteria include input voltage tolerance (0–7 V), symmetrical output drive (|IOH| = IOL ≥ 24 mA @ 3 V), power-down protection, balanced tPLH/tPHL delays, and operation across industrial temperature range (−55 °C to +125 °C).

Technical Context

This device implements a single 2-input OR logic function using sub-micron C2MOS technology with three-stage buffered output for high noise immunity. Its input structure accepts voltages up to 7 V independent of VCC, enabling safe interfacing between 3.3 V and 5 V domains without external level shifters.

The internal design includes power-down protection on all I/O pins and ESD safeguards per IEC standards. Propagation delays are balanced (tPLH ≅ tPHL), and output impedance is symmetrical, supporting clean signal integrity in bidirectional or timing-critical paths.

Key Specifications

Pinout & Package

74LX1G32CTR is housed in a 5-pin SC70 (SOT-323) package - ultra-small surface-mount outline measuring 1.80 mm × 2.20 mm × 0.95 mm (max height), optimized for space-constrained portable and sensor-interface PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and NC7SZ32P5X, the 74LX1G32CTR delivers superior 7 V input tolerance, tighter propagation delay matching (tPLH ≅ tPHL), and higher output current - making it preferred for robust mixed-voltage interface and timing-sensitive consolidation logic.

Availability

74LX1G32CTR 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 74LX1G32CTR 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 applications in space- and power-constrained systems - emphasizing voltage flexibility, I/O robustness, and industrial-grade reliability.

FAQ

Can 74LX1G32CTR operate with VCC = 1.2 V?

No - the specified minimum operating VCC is 1.65 V. While data retention is guaranteed down to 1.2 V, functional logic operation (truth table compliance, output drive, timing) is only assured from 1.65 V to 5.5 V per recommended operating conditions.

Does 74LX1G32CTR require external pull-up or pull-down resistors on inputs?

No - inputs are internally protected and do not require external biasing. The device features built-in ESD protection and power-down protection; inputs float to valid logic levels only when actively driven, and no pull resistors are needed for normal operation.

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

The AC specifications are characterized up to 50 pF load capacitance. At VCC = 3.0 V and CL = 50 pF, tPD remains ≤4.7 ns. Driving >50 pF may increase delay and reduce edge rate; for heavier loads, consider adding a buffer stage or verifying timing margins in final layout.

Is 74LX1G32CTR pin-compatible with 74LVC1G32 in SC70-5?

Yes - both devices share identical SC70-5 pinout (1A, 1B, GND, 1Y, VCC). However, 74LX1G32CTR offers 7 V input tolerance versus 3.6 V for 74LVC1G32, so direct substitution is electrically safe only if input voltages never exceed 3.6 V in the target design.