Diodes Incorporated 74LVC1G32QSE-7

Overview

74LVC1G32QSE-7 from Diodes Incorporated is an automotive-grade single 2-input positive OR gate in SOT353 package, operating from 1.65V to 5.5V supply, with 5.5V-tolerant inputs, ±24mA output drive at 3.3V, and IOFF-enabled partial power-down protection. It performs Y = A + B logic in Grade 1 (–40°C to +125°C) automotive systems for signal-level isolation and voltage translation.

For engineers reviewing the 74LVC1G32QSE-7 datasheet, 74LVC1G32QSE-7 pinout, 74LVC1G32QSE-7 application, or 74LVC1G32QSE-7 equivalent, key selection criteria include input voltage tolerance, IOFF leakage (<±2μA), propagation delay (≤6.0ns at 3.3V), thermal resistance (θ_JA = 385°C/W), and AEC-Q100 qualification for automotive use.

Technical Context

This device implements a non-inverting Boolean OR function (Y = A + B) using CMOS logic with push-pull outputs. Its IOFF circuit actively disables output during power-down, blocking backflow current when V_CC = 0V - critical for mixed-voltage domain interfacing.

Input tolerance up to 5.5V independent of V_CC enables level-shifting between 1.8V, 2.5V, 3.3V, and 5V rails. Propagation delay ranges from 0.5ns (min) to 6.0ns (max) at 3.3V, with input capacitance of 5.0pF and power dissipation capacitance of 16pF at 10MHz.

Key Specifications

Pinout & Package

SOT353 (5-pin, 2.15mm × 2.1mm × 1.1mm, 0.65mm pitch) surface-mount package with moisture sensitivity level 1 (J-STD-020) and matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and 74AUP1G32GW,125, the 74LVC1G32QSE-7 uniquely delivers Grade 1 temperature operation, IOFF-enabled power-down safety, and 5.5V input tolerance - making it the sole choice for AEC-Q100-compliant automotive signal aggregation where mixed-voltage robustness and fail-safe behavior are mandatory.

Availability

74LVC1G32QSE-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC input conditioning, and medical diagnostic equipment status monitoring requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74LVC1G32QSE-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.

The 74LVC logic family targets low-voltage, high-speed digital interfacing with robust mixed-supply operation - designed specifically for automotive signal conditioning, power sequencing, and fault-aggregation applications demanding AEC-Q100 compliance.

FAQ

Can 74LVC1G32QSE-7 operate reliably at 1.65V supply while driving a 30pF load?

Yes. At V_CC = 1.65V, the device guarantees t_PD ≤10.5ns (max) into a 30pF load with 1kΩ pull-up, and maintains VOL ≤0.70V at 4mA sink current. Its CMOS design ensures full logic swing and noise margin even at minimum supply, validated across –40°C to +125°C.

What happens to the output when V_CC is disconnected while inputs remain at 5.5V?

The IOFF circuit activates immediately upon V_CC drop below threshold, placing the Y output in high-impedance state with leakage ≤±2μA. This prevents reverse current flow from 5.5V inputs into the unpowered V_CC rail - protecting upstream drivers and avoiding latch-up.

Is the SOT353 package suitable for reflow soldering in lead-free processes?

Yes. The SOT353 package uses matte tin-plated leads compliant with MIL-STD-202 Method 208 and is rated for lead-free reflow per J-STD-020 Level 1 (unlimited floor life). Peak temperature tolerance exceeds 260°C, supporting standard Pb-free profile ramp rates and dwell times.

How does input capacitance affect high-frequency signal integrity?

With CI = 5.0pF (typical), the device adds minimal loading to driving sources. At 10MHz, its CPD = 16pF contributes <0.2mA dynamic current per transition, preserving edge rate and reducing crosstalk risk in dense PCB layouts - verified in Diodes' application note AP02007.