Diodes Incorporated 74LVC1G32Z-7

Overview

74LVC1G32Z-7 from Diodes Incorporated is a single 2-input positive OR gate in SOT553 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 74LVC1G32Z-7 datasheet, 74LVC1G32Z-7 pinout, 74LVC1G32Z-7 application, or 74LVC1G32Z-7 equivalent, this page delivers verified electrical specs, thermal resistance (θJA = 231°C/W), SOT553 pin mapping, and real-world use cases in mixed-voltage interface design.

Technical Context

This device implements standard CMOS positive-OR logic (Y = A OR B) with push-pull output stage and no internal pull-ups or latching. Its IOFF circuit actively disables outputs during power-down to prevent backflow current, enabling safe hot-insertion in multi-rail systems.

Input tolerance up to 5.5V allows direct interfacing between 1.8V/2.5V/3.3V logic domains and 5V controllers without external level shifters. Propagation delay is 2.1ns typical at 3.3V, supporting >100MHz toggle rates in non-critical timing paths.

Key Specifications

Pinout & Package

SOT553 (1.6mm × 1.6mm × 0.62mm, 0.5mm lead pitch) is a 5-pin ultra-small-outline transistor package with exposed pad not connected internally. Pin 1 is marked by chamfered corner; pin numbering follows standard top-view counterclockwise sequence starting from pin 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and 74LVC1G32FS3-7, the 74LVC1G32Z-7 balances minimal footprint (1.6mm²), manufacturability (gull-wing leads), and thermal performance (231°C/W), making it optimal for cost-sensitive consumer electronics requiring rapid prototyping and field serviceability.

Availability

74LVC1G32Z-7 is available at Aetrix Electronics and suitable for USB peripheral interface, IoT sensor hub logic, and industrial HMI button matrix applications requiring stable component supply, consistent tape-and-reel packaging (4000 per reel), and RoHS-compliant manufacturing.

Supply support for 74LVC1G32Z-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 ISO/TS 16949-certified facilities.

The 74LVC logic family targets low-voltage, high-speed digital interface applications, emphasizing mixed-voltage compatibility, power efficiency, and robustness in portable and industrial electronics.

FAQ

Can 74LVC1G32Z-7 operate reliably at 1.65V supply?

Yes. The device is fully specified down to 1.65V: VIH minimum is 0.65×VCC (1.07V), VOL maximum is 0.45V at 4mA load, and tPD remains ≤8.0ns. All DC and AC parameters meet datasheet limits across –40°C to +125°C at this voltage.

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

At 3.3V supply and 24mA output drive, the gate can reliably drive up to 30pF load capacitance while maintaining tPD ≤4.5ns and VOH ≥2.2V. For loads >50pF, propagation delay increases nonlinearly and output voltage swing degrades beyond specification limits.

Does the NC pin on SOT553 require grounding or floating?

Pin 3 in SOT553 is GND, not NC; the NC terminal does not exist in this variant. The SOT553 pinout is A–B–GND–Y–VCC (no NC). Confusion may arise from other packages (e.g., X2-DFN1410-6 has NC), but 74LVC1G32Z-7 uses all five pins functionally.

How does IOFF protect during partial power-down?

When VCC = 0V, the IOFF circuit disconnects both input and output structures from internal rails, limiting I/O leakage to ±200μA even with 5.5V applied to A, B, or Y pins. This prevents current backflow into powered sections and avoids unintended logic state corruption.