Diodes Incorporated 74LVCE1G32W5-7

Overview

74LVCE1G32W5-7 from Diodes Incorporated is a single 2-input positive OR gate with totem-pole CMOS output, designed for 1.4V–5.5V supply operation and 5.5V-tolerant inputs. It delivers ±24mA drive at 3.3V, supports partial power-down via IOFF, and enables voltage-level shifting in mixed-voltage systems such as USB peripheral interfaces and I²C bus repeaters.

For engineers reviewing the 74LVCE1G32W5-7 datasheet, 74LVCE1G32W5-7 pinout, 74LVCE1G32W5-7 application, or 74LVCE1G32W5-7 equivalent, key selection criteria include supply voltage flexibility (1.4V–5.5V), IOFF-enabled isolation during power-down, 5.5V input tolerance, propagation delay down to 0.7ns at 3.3V/15pF, and SOT25 package compatibility with space-constrained PCB layouts.

Technical Context

This device implements the Boolean OR function (Y = A + B) using standard CMOS logic with totem-pole output stage. Its IOFF circuit actively disables output leakage when VCC = 0V, preventing backflow current in partial-power-down systems.

Input thresholds scale with VCC (e.g., VIH = 0.65×VCC at 1.4–1.95V), enabling reliable interfacing across 1.4V, 1.8V, 2.5V, 3.3V, and 5V logic domains. Propagation delay is characterized from 1.5V to 5V with CL = 15pF and 30/50pF loads, supporting timing-critical signal routing in low-voltage embedded control paths.

Key Specifications

Pinout & Package

SOT25 (5-pin SC-74A) package with exposed pad not present; JEDEC-compliant footprint, 1.27mm pitch, 2.2mm × 1.35mm body size. Thermal resistance θJA = 204°C/W on FR-4 with minimum copper pad layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G32DBVR and 74AUP1G32GW,125, the 74LVCE1G32W5-7 uniquely combines 1.4V operation, 5.5V input tolerance, and IOFF - making it the only choice for robust mixed-voltage OR logic in battery-powered, hot-plug, or safety-isolated applications.

Availability

74LVCE1G32W5-7 is available at Aetrix Electronics and suitable for USB peripheral interface design, I²C bus extension, low-power sensor hub logic, and industrial control signal merging requiring stable component supply across automotive, industrial, and consumer production programs.

Supply support for 74LVCE1G32W5-7 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, low-power, and mixed-signal solutions for industrial, computing, and consumer markets.

The 74LVCE logic family targets low-voltage, mixed-supply digital interface applications - emphasizing wide VCC range, IOFF protection, and 5V-tolerant inputs to simplify voltage translation in modern heterogeneous systems.

FAQ

Can 74LVCE1G32W5-7 operate reliably at 1.4V supply while driving a 15pF load?

Yes. The datasheet specifies tPD = 1.9ns (min) to 7.2ns (max) at VCC = 1.5V ±0.1V and CL = 15pF, confirming functional operation at 1.4V - the absolute minimum operating voltage. Output drive remains sufficient for light capacitive loads, though VOL rises to 0.4V at 3mA sink current, requiring compatible downstream VIH thresholds.

What is the purpose of the NC pin in DFN1410 variant, and does it affect SOT25 pinout?

The DFN1410 package has a No-Connect (NC) pin (Pin 6), unused internally and left floating per design. This does not affect the SOT25 variant (74LVCE1G32W5-7), which has no NC pin - its 5-pin mapping (A-B-GND-Y-VCC) is fixed and fully defined. Pin 2 and Pin 5 in DFN1410 are internally shorted, but SOT25 maintains independent GND and VCC terminals.

How does IOFF behavior differ from standard high-impedance tri-state outputs?

IOFF activates automatically when VCC = 0V, forcing Y into high-impedance regardless of A/B input states or control signals - unlike tri-state, which requires an explicit enable input. This passive, supply-dependent isolation prevents back-current flow during full power-down, meeting IEC 61000-4-2 system-level ESD and hot-swap requirements without firmware intervention.

Is the SOT25 package RoHS-compliant and lead-free?

Yes. Per Diodes Incorporated's ordering information and marking documentation, the 74LVCE1G32W5-7 uses lead-free finish and complies with EU Directive 2002/95/EC (RoHS), including all applicable exemptions. The molding compound is "Green" (Br/Sb-free), and the device is qualified per JESD22-A114 (2kV HBM) and JESD78 (100mA latch-up).