NXP Semiconductors 74ALVC32D,112

Overview

74ALVC32D from Nexperia is a quad 2-input OR gate logic IC with Schmitt-trigger inputs, IOFF partial power-down capability, and operation across 1.65 V to 3.6 V supply. It delivers propagation delay as low as 2.0 ns at 3.0–3.6 V, supports -40 °C to +125 °C ambient, and features overvoltage-tolerant inputs up to 3.6 V. Used in level-shifting bus interfaces and noise-immune digital control circuits.

For engineers reviewing the 74ALVC32D datasheet, 74ALVC32D pinout, 74ALVC32D application, or 74ALVC32D equivalent, this page provides verified functional identity, SO14 package mapping, IOFF behavior under power-down, Schmitt-trigger input thresholds, and real-world timing performance at multiple VCC levels.

Technical Context

This device implements four independent 2-input OR gates with Schmitt-trigger inputs on all eight inputs (1A–4B), enabling robust handling of slow-rising signals and noise rejection in mixed-voltage systems. Each output (1Y–4Y) is CMOS-compatible and supports rail-to-rail swing.

The IOFF circuit actively disables outputs when VCC = 0 V, blocking backflow current and enabling hot-insertion in multi-rail systems. Input clamping diodes and ESD protection (HBM >2000 V, CDM >1000 V) ensure reliability in industrial environments.

Key Specifications

Pinout & Package

74ALVC32D is supplied in SO14 (SOT108-1) plastic small outline package: 14-lead, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads. Pin 1 index located at top-left corner with notch or dot marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC32APWR and 74AUP1G32GW,125, the 74ALVC32D uniquely combines Schmitt-trigger inputs, IOFF, and industrial temperature support in a single quad package - making it the only choice for noise-prone, hot-pluggable, or mixed-voltage control logic where signal integrity and power sequencing matter.

Availability

74ALVC32D is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and guaranteed -40 °C to +125 °C operation.

Supply support for 74ALVC32D 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

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components - spun off from NXP in 2017 and headquartered in Nijmegen, Netherlands.

The 74ALVC series targets industrial and communications applications demanding wide voltage operation, robust ESD performance, and partial power-down capability - optimized for mixed-supply systems with stringent noise and sequencing requirements.

FAQ

Does 74ALVC32D support true bidirectional operation?

No. The 74ALVC32D is a unidirectional combinatorial logic device with dedicated inputs (1A–4B) and outputs (1Y–4Y). It does not support bus transceiver or bidirectional data flow. Its IOFF feature only disables outputs during power-down - it does not enable input/output role reversal or three-state control beyond the defined OR function.

Can 74ALVC32D be used with a 5 V microcontroller interface?

No - absolute maximum input voltage is +4.6 V, but recommended operating input voltage is limited to 3.6 V. Direct connection to 5 V logic violates the VI specification and risks latch-up or accelerated wear. A level-shifter (e.g., TXB0104) or resistor-divider network is required for safe interfacing with 5 V systems.

What is the thermal resistance (RθJA) for the SO14 package?

For the SOT108-1 (SO14) package, RθJA is 105 K/W under standard JEDEC PCB conditions (2s2p copper). Total power dissipation is derated linearly at 10.1 mW/K above 100 °C ambient, limiting usable Ptot to ~350 mW at +125 °C ambient - consistent with its 500 mW maximum rating at +25 °C.

Is the GND pad on the DHVQFN package (74ALVC32BQ) electrically connected?

No - the exposed thermal pad (pin 1 index area) on the SOT762-1 (DHVQFN14) package is not electrically connected to internal GND. Per datasheet note (1), it may remain floating or be soldered to PCB ground, but no electrical requirement exists. This differs from the SO14 and TSSOP variants, which lack such a pad entirely.