Diodes Incorporated AH3233Q-W-7

Overview

AH3233Q-W-7 from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC in SC59 (Type A1) package, designed for position and proximity sensing in harsh environments. It operates from 2.7V to 27V, features direct-output polarity, −1100 ppm/°C temperature coefficient, 27–63 G operating point (BOP), and 10–46 G release point (BRP) at +25°C. Used in seatbelt buckle detection and gear position sensing.

For engineers reviewing the AH3233Q-W-7 datasheet, AH3233Q-W-7 pinout, AH3233Q-W-7 application, or AH3233Q-W-7 equivalent, this page delivers verified magnetic thresholds, thermal shutdown behavior, chopper-stabilized offset cancellation, reverse supply protection, and two-wire current-sinking output configuration for automotive-grade reliability validation.

Technical Context

The AH3233Q-W-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling stable switching across −40°C to +150°C ambient. Its unipolar response activates on south-pole magnetic field exceeding BOP (27–63 G) and releases only when flux falls below BRP (10–46 G), with no polarity reversal required.

It integrates UVLO (2.2–2.7 V), overtemperature shutdown (190°C trip, 180°C release), reverse-blocking diode with zener clamp, and ESD protection (8 kV HBM / 1 kV CDM). The NC pin (Pin 2) is electrically isolated and may be left floating, tied to VDD, or grounded without functional impact.

Key Specifications

Pinout & Package

Package: SC59 (Type A1), 3-pin single-inline plastic package with gull-wing leads; thermal resistance R_θJA = 268°C/W on 50 mm × 50 mm 2 oz PCB.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unipolar Hall switch applications.

Compared with AH3232Q-W-7, AH3233Q-W-7 offers lower BOP for tighter magnetic coupling control; compared with AH3234Q-W-7, it provides direct polarity alignment with standard high-side sensing architectures - both alternatives retain identical thermal, voltage, and packaging specifications.

Availability

AH3233Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and wiper park position applications requiring stable component supply across automotive production lifecycles.

Supply support for AH3233Q-W-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 components for automotive, industrial, and computing markets.

AH3233Q-W-7 belongs to the AH32xxQ automotive Hall-effect switch family, engineered specifically for contactless position sensing in engine bay, transmission, and body electronics where AEC-Q100 Grade 0 compliance and two-wire simplicity are mandatory.

FAQ

What is the function of Pin 2 (NC) on AH3233Q-W-7?

Pin 2 is a no-connect terminal with no internal connection. It may be left floating, tied to VDD, or connected to GND without affecting device operation, thermal performance, or magnetic sensitivity. This design allows flexibility in PCB layout and mechanical mounting without electrical trade-offs.

Does AH3233Q-W-7 require an external decoupling capacitor?

Yes - a minimum 100 nF ceramic capacitor must be placed between VDD and GND, as close as possible to the IC pins. This stabilizes the internal bandgap regulator, suppresses supply noise, and ensures reliable chopper-stabilized operation; omission causes increased jitter and potential false triggering.

How does the thermal shutdown mechanism behave during sustained overtemperature?

The device shuts down at 190°C junction temperature and automatically restarts once the junction cools below 180°C. This hysteresis prevents oscillation during thermal transients. During shutdown, output current drops to IOFF level (5–6.9 mA), preserving system-level fault visibility without requiring external monitoring circuitry.

Can AH3233Q-W-7 operate reliably with weak magnets at high temperature?

Yes - its −1100 ppm/°C temperature coefficient ensures BOP remains within 20–70 G across −40°C to +150°C, and the 17 G typical hysteresis margin prevents chatter. Combined with 7 μs response time and 30–50 kHz max switching frequency, it maintains deterministic switching even with low-flux magnets at elevated ambient temperatures.