Diodes Incorporated AH3244Q-W-7

Overview

AH3244Q-W-7 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; used in seatbelt buckle sensing, door/trunk closure detection, and gear position feedback systems where magnetic field reversal triggers state change.

For engineers reviewing the AH3244Q-W-7 datasheet, AH3244Q-W-7 pinout, AH3244Q-W-7 application, or AH3244Q-W-7 equivalent, key selection criteria include its unipolar switching behavior (BOP = 27–63 G, BRP = 10–46 G at +25°C), chopper-stabilized architecture for <±3.3 µs jitter, thermal shutdown at 190°C, and SC59 (Type A1) package with VDD/GND/NC pinout.

Technical Context

The AH3244Q-W-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, delivering ±1100 ppm/°C temperature coefficient for BOP/BRP stability across -40°C to +150°C. Its two-wire configuration enables current-sinking output via supply-line modulation, eliminating separate ground return.

Self-diagnostic capability includes safe-mode current reporting (ISAFE = 0.5–1.5 mA), UVLO activation at 2.2–2.7 V, and overtemperature shutdown with auto-restart at 180°C release threshold. Magnetic response is south-pole active with inverted logic: output current turns ON when flux exceeds BOP and OFF when flux falls below BRP.

Key Specifications

Pinout & Package

Package: SC59 (Type A1), 3-pin surface-mount package with 1.15 mm body height, 2.90 mm × 2.80 mm footprint, and 0.95 mm lead pitch; optimized for automated placement and reflow soldering on automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3244Q-W-7, AH3244Q-W-7 adds diagnostic current reporting and thermal auto-restart, enabling ASIL-B compliance; versus TLE4913-2SA, it eliminates ground wiring and integrates transient protection, reducing BOM count by two components in two-wire architectures.

Availability

AH3244Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle sensing, door/trunk closure detection, and gear position feedback requiring stable component supply in automotive production programs.

Supply support for AH3244Q-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing facilities.

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

FAQ

What is the magnetic polarity requirement for AH3244Q-W-7 operation?

The AH3244Q-W-7 is south-pole active with inverted output logic: it turns ON when a south pole approaches the marked surface and exceeds BOP (27–63 G), and turns OFF when flux drops below BRP (10–46 G). North pole exposure produces no switching action.

Can AH3244Q-W-7 operate directly from a 12 V automotive battery without external regulation?

Yes - the device operates natively across 2.7 V to 27 V and includes an internal bandgap regulator and zener clamp on VDD, enabling direct connection to unregulated vehicle battery rails including cold-crank (6.5 V) and load-dump (27 V) transients.

How does the NC pin affect PCB layout or thermal performance?

Pin 2 (NC) is internally unconnected and has no electrical or thermal function; it may be left floating, tied to VDD, or connected to GND without impact on operation, reliability, or junction temperature rise in SC59 packaging.

Is AH3244Q-W-7 compliant with ISO 26262 functional safety requirements?

The AH3244Q-W-7 is ISO 26262-ready with integrated self-diagnostics (safe-mode current reporting), AEC-Q100 Grade 0 qualification, and PPAP-capable manufacturing, but final ASIL assignment requires system-level analysis per ISO 26262-5 and -10 by the end-application integrator.