Nexperia USA Inc. 74AHC32BQ,115

Overview

74AHC32BQ,115 from Nexperia is a quad 2-input OR gate in DHVQFN14 package, operating from 2.0 V to 5.5 V supply, with overvoltage-tolerant inputs up to 5.5 V, Schmitt-trigger inputs for noise immunity, and propagation delay as low as 2.8 ns (VCC = 4.5–5.5 V, CL = 15 pF). It serves as a level-translating logic combiner in mixed-voltage digital interfaces such as industrial I/O expansion and microcontroller peripheral gating.

For engineers reviewing the 74AHC32BQ,115 datasheet, 74AHC32BQ,115 pinout, 74AHC32BQ,115 application, or 74AHC32BQ,115 equivalent, this device supports voltage translation between 3.3 V and 5 V domains, delivers balanced tPLH/tPHL timing, meets -40 °C to +125 °C industrial temperature requirements, and provides ESD robustness (HBM > 2000 V, CDM > 1000 V).

Technical Context

This CMOS logic IC implements four independent 2-input OR gates with identical input/output electrical characteristics across all channels. Each gate features Schmitt-trigger inputs for hysteresis-based noise rejection and overvoltage-tolerant input structures enabling safe operation when interfacing with higher-voltage signals - critical in mixed-supply systems where 5 V peripherals connect to 3.3 V controllers.

The device operates within two distinct input logic families: 74AHC32 accepts CMOS-level inputs (VIH ≥ 3.85 V at VCC = 5.5 V), while its AHCT variant uses TTL-compatible thresholds (VIH ≥ 2.0 V). Its DHVQFN14 package (SOT762-1) provides thermal enhancement via an exposed die pad, supporting stable performance under sustained switching loads in space-constrained PCB layouts.

Key Specifications

Pinout & Package

DHVQFN14 package (SOT762-1): 2.5 mm × 3.0 mm × 0.85 mm body, no leads, 14 terminals, exposed thermal pad (non-soldered by default; may be floated or connected to GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74AHCT32BQ,115, the AHC variant offers lower static current and wider VCC flexibility but requires higher VIH; versus SN74LVC32APWR, it trades off drive capability for input ruggedness and thermal efficiency in compact packages.

Availability

74AHC32BQ,115 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, medical diagnostic equipment interfaces, and microcontroller peripheral gating requiring stable component supply across extended temperature ranges.

Supply support for 74AHC32BQ,115 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 delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial and consumer electronics.

The 74AHC series targets high-speed, low-power CMOS logic applications demanding wide supply range, noise immunity, and mixed-voltage interoperability - especially in space-constrained, thermally demanding embedded systems.

FAQ

Can 74AHC32BQ,115 safely interface a 5 V sensor output with a 3.3 V microcontroller?

Yes. Its inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection of 5 V sensor outputs to the IC while powered from 3.3 V. No external level-shifting components are needed, and Schmitt-trigger action suppresses noise from long sensor cables. Input leakage remains below 0.1 μA at 5.5 V, minimizing loading on the source.

What is the recommended PCB layout practice for the exposed thermal pad on the DHVQFN14 package?

The exposed pad (terminal 1 index area) has no electrical requirement to be soldered. If soldered, it must remain electrically floating or be connected to GND - never left as a floating metal island. Use 4–6 thermal vias (0.3 mm diameter) beneath the pad tied to an internal GND plane to enhance thermal conduction without creating solder voids or tombstoning during reflow.

How does propagation delay vary across temperature and supply voltage for timing-critical designs?

At VCC = 4.5–5.5 V and CL = 15 pF, tpd ranges from 2.8 ns (typ.) to 7.0 ns (max) over -40 °C to +125 °C. At VCC = 3.0 V, delay increases to 3.9–10.0 ns. Designers should use the 125 °C max value for worst-case setup/hold analysis, especially in motor control or power supply sequencing applications where ambient exceeds 85 °C.

Is 74AHC32BQ,115 suitable for automotive under-hood applications?

It is rated for -40 °C to +125 °C and meets industrial reliability standards, but it is not AEC-Q100 qualified. While functionally capable in under-hood environments (e.g., engine control auxiliary logic), it lacks automotive-specific qualification testing for vibration, humidity, and lifetime stress. For production automotive ECUs, use only AEC-Q100 qualified equivalents unless approved under customer-specific deviation processes.