Diodes Incorporated AH3244Q-P-A

Overview

AH3244Q-P-A from Diodes Incorporated is a two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, AEC-Q100 qualified for -40°C to +150°C operation, 2.7V–27V supply range, and inverted output polarity optimized for seatbelt buckle and door closure sensing in 12V/24V vehicle systems.

For engineers reviewing the AH3244Q-P-A datasheet, AH3244Q-P-A pinout, AH3244Q-P-A application, or AH3244Q-P-A equivalent, this page delivers verified magnetic thresholds (BOP = 27–63 G, BRP = 10–46 G), chopper-stabilized architecture, thermal shutdown at 190°C, 8kV HBM ESD rating, and SIP-3 package pin mapping - all confirmed from Diodes' DS41822 Rev. 6-3.

Technical Context

The AH3244Q-P-A implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, delivering ±3.3μs output jitter and <1μs current rise/fall time under 50pF load. Its unipolar switching behavior responds exclusively to south-pole magnetic fields exceeding BOP (27–63 G), holding state until flux drops below BRP (10–46 G).

Integrated diagnostics include undervoltage lockout (2.2–2.7V threshold), safe-mode error current (0.5–1.5mA), and overtemperature protection with auto-restart at 180°C release. The device features reverse-blocking diode, zener clamp, and UVLO reaction time ≤10μs - all supporting ISO 26262 readiness in safety-critical automotive subsystems.

Key Specifications

Pinout & Package

Package: SIP-3 (Ammo Pack), 3-pin single-inline package with straight leads, 14.5mm body length, 3.0mm width, and 1.5mm height - optimized for through-hole mounting in automotive harness connectors and PCB edge-mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar two-wire Hall switch applications.

Compared with AL3244Q-P-A and TLE4913-2SA, the AH3244Q-P-A uniquely combines two-wire simplicity, AEC-Q100 Grade 0 qualification, integrated diagnostics, and reverse-voltage protection - making it the only drop-in solution for new ASIL-B-compliant automotive position sensing designs requiring zero additional protection components.

Availability

AH3244Q-P-A is available at Aetrix Electronics and suitable for seatbelt buckle detection, door/trunk closure monitoring, wiper position feedback, and gear selector position sensing requiring stable component supply across automotive production lifecycles.

Supply support for AH3244Q-P-A 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 automotive, industrial, and power management solutions with IATF 16949-certified facilities.

The AH324xQ series belongs to Diodes' automotive Hall-effect switch product line, designed specifically for contactless position and proximity sensing in harsh environments where AEC-Q100 compliance, wide voltage operation, and integrated diagnostics are mandatory.

FAQ

What is the magnetic polarity sensitivity of AH3244Q-P-A?

The AH3244Q-P-A is a south-pole-activated unipolar switch: it turns ON only when a south magnetic pole exceeds its BOP threshold (27–63 G at 25°C), and remains ON until flux drops below BRP (10–46 G). It does not respond to north poles or alternating fields - ensuring immunity to stray magnetic interference in vehicle cabins.

Does AH3244Q-P-A require an external decoupling capacitor?

Yes - a minimum 100nF ceramic capacitor must be placed between VDD and GND, located as close as possible to the IC pins. This stabilizes the internal bandgap regulator, suppresses supply noise from automotive transients, and ensures reliable magnetic sampling. Larger values (e.g., 1µF) are recommended if VDD exhibits ripple above 50mV peak-to-peak.

How does the self-diagnostic function operate during normal use?

The AH3244Q-P-A continuously monitors supply voltage, junction temperature, and magnetic sampling integrity. Under fault conditions (e.g., UVLO, overtemperature, or invalid magnetic sampling), it enters safe mode and sinks a diagnostic current of 0.5–1.5mA - distinguishable from normal ON (12–17mA) and OFF (5–6.9mA) states - enabling ECU-level fault classification without additional circuitry.

Can AH3244Q-P-A be used in 24V commercial vehicle systems?

Yes - the AH3244Q-P-A operates across 2.7V to 27V and is rated for 32V absolute maximum supply voltage. Its integrated reverse-blocking diode and zener clamp protect against load-dump transients up to ±32V, and its thermal shutdown (190°C) and auto-restart (180°C) ensure robustness in heavy-duty truck and bus environments where ambient temperatures exceed 105°C.