Diodes Incorporated 74LVC1G32SE-7

Overview

74LVC1G32SE-7 from Diodes Incorporated is a single 2-input positive OR gate in SOT353 package, operating from 1.65V to 5.5V supply, with ±24mA output drive at 3.3V, 5.5V-tolerant inputs, and IOFF partial power-down protection. It performs Boolean Y = A + B logic and is used for voltage level shifting and signal isolation in portable computing peripherals.

For engineers reviewing the 74LVC1G32SE-7 datasheet, 74LVC1G32SE-7 pinout, 74LVC1G32SE-7 application, or 74LVC1G32SE-7 equivalent, key selection criteria include supply voltage range, output drive strength, input voltage tolerance, IOFF functionality, and SOT353 thermal performance (θJA = 371°C/W).

Technical Context

This device implements standard positive-logic OR functionality (Y = A OR B) using CMOS technology with push-pull outputs. Its IOFF circuit disables output leakage during partial power-down, preventing backflow current when VCC = 0V while inputs or outputs remain biased.

Input voltage tolerance up to 5.5V enables interoperability across mixed-voltage domains (e.g., 1.8V logic driving 3.3V or 5V systems). Propagation delay is 2.1ns typical at 3.3V, with 4.5ns max over –40°C to +125°C.

Key Specifications

Pinout & Package

SOT353 (2.0mm × 2.0mm × 1.1mm, 0.65mm pitch) is a 5-pin surface-mount package with exposed pad not connected internally. Pin 1 is marked by a dot or chamfered corner; pin numbering follows standard counter-clockwise sequence from top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and 74LVC1G32Z-7, the 74LVC1G32SE-7 offers optimal balance of thermal resistance (371°C/W), board area (4.0mm²), and manufacturability - making it ideal for mid-volume portable electronics requiring reflow compatibility and test accessibility.

Availability

74LVC1G32SE-7 is available at Aetrix Electronics and suitable for USB peripheral interface, industrial sensor hub, and mobile display backlight control applications requiring stable component supply, consistent tape-and-reel packaging (3000 per reel), and RoHS-compliant manufacturing.

Supply support for 74LVC1G32SE-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 semiconductor company specializing in discrete, analog, and logic solutions, with design centers in Asia, Europe, and the US, and manufacturing in IATF 16949-certified facilities.

The 74LVC logic family targets low-voltage, high-speed digital interface applications across consumer, industrial, and automotive markets, emphasizing power efficiency, voltage flexibility, and robust ESD performance.

FAQ

What is the maximum allowable input voltage when VCC = 0V?

The 74LVC1G32SE-7 supports 5.5V-tolerant inputs regardless of VCC state. When VCC = 0V, inputs A and B may safely remain at up to 5.5V due to internal clamping and IOFF isolation, preventing damage or unintended current paths. This is verified per JESD78 latch-up testing (>100mA) and absolute maximum ratings.

Does this device require external pull-up or pull-down resistors on unused inputs?

Yes. Per Diodes' recommended operating conditions, unused inputs must be tied to VCC or GND to prevent floating nodes that cause increased ICC, oscillation, or EMI. The device lacks internal weak pull-ups; external termination ensures stable logic states and avoids undefined output behavior during power-up or brownout.

Can the 74LVC1G32SE-7 drive a 50pF load at 10MHz without signal degradation?

Yes. With Cpd = 21pF at 3.3V and tPD = 4.5ns max, the device drives 50pF loads reliably at 10MHz. Measured propagation delay remains within spec, and output rise/fall times (≤2.5ns at 3.3V) ensure clean edges. No external series termination is needed for typical PCB trace lengths under 5cm.

Is the SOT353 package lead-free and halogen-free per industry standards?

Yes. The 74LVC1G32SE-7 is fully RoHS 3 compliant (2015/863/EU), with no purposely added lead, and classified as "Green" per Diodes' definition: Br <900ppm, Cl <900ppm (Br+Cl <1500ppm), Sb <1000ppm. Certificate of Compliance is available upon request.