Diodes Incorporated AH3323Q-SA-7

Overview

AH3323Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC in SOT23 (Type S) package, designed for position and proximity sensing in seatbelt buckles and gear stick assemblies. It operates from 3.0V to 28V supply, features open-drain output with 30–72 G operate point (BOP), 20–50 G release point (BRP), and delivers <0.4 V on-state voltage at 20 mA load.

For engineers reviewing the AH3323Q-SA-7 datasheet, AH3323Q-SA-7 pinout, AH3323Q-SA-7 application, or AH3323Q-SA-7 equivalent, this device supports robust magnetic sensing in high-temperature automotive environments where reverse polarity protection, 40 V load dump tolerance, and chopper-stabilized thermal stability are critical selection criteria.

Technical Context

The AH3323Q-SA-7 implements a chopper-stabilized architecture with dynamic offset cancellation and internal bandgap-regulated supply, enabling minimal switch-point drift across –40°C to +150°C ambient. Its magnetic response is defined by fixed BOP (38–72 G) and BRP (20–50 G) thresholds with 12–28 G hysteresis, optimized for reliable South-pole actuation on the part-marking side of the SOT23 (Type S) package.

It integrates reverse-blocking diode, zener clamps on VDD and OUTPUT pins, and output current limiting (30–55 mA). The single open-drain output requires external pull-up and exhibits 10 µs typical power-on time, 4 µs response delay, and <1 µs rise/fall times under RL = 1 kΩ / CL = 20 pF conditions.

Key Specifications

Pinout & Package

SOT23 (Type S) package: 3-pin surface-mount, 2.9 mm × 2.4 mm × 1.0 mm body, lead-free and RoHS compliant, marked with identification code "S2BQ".

Key Features

Applications

Equivalent & Alternatives

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

Compared with A1120EUA-T and US5881LUA-ABA-000-RE, the AH3323Q-SA-7 uniquely combines AEC-Q100 Grade 0 qualification, 40 V load dump tolerance, and SOT23 packaging-making it the only option validated for direct integration into transmission gear position sensors and steering immobilizers requiring full powertrain-grade reliability.

Availability

AH3323Q-SA-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear stick position sensing, and steering column lock applications requiring stable component supply across automotive production lifecycles.

Supply support for AH3323Q-SA-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.

The AH332XQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in harsh-temperature, high-reliability automotive subsystems.

FAQ

What is the magnetic polarity requirement for AH3323Q-SA-7 actuation?

The AH3323Q-SA-7 in SOT23 (Type S) package requires a South pole applied to the part-marking side to activate the output. This is confirmed in the datasheet's magnetic characteristics table and pin diagram. Applying North pole or reversing orientation results in no switching action. Polarity sensitivity is fixed and not configurable.

Does AH3323Q-SA-7 require an external pull-up resistor on the OUTPUT pin?

Yes-AH3323Q-SA-7 has an open-drain output and requires an external pull-up resistor (RL) between OUTPUT and VDD. The datasheet recommends RL = 1 kΩ for timing-critical applications and specifies rise/fall times under that condition. Pull-up values from 1 kΩ to 10 kΩ are commonly used depending on speed and power trade-offs.

Can AH3323Q-SA-7 be used in 48 V automotive architectures?

No-AH3323Q-SA-7 is rated for 3.0 V to 28 V operating supply and 40 V absolute maximum transient. It is not suitable for 48 V systems. For 48 V applications, Diodes offers the AH336XQ family (e.g., AH3363Q) with 60 V abs max rating and compatible magnetic thresholds.

Is the SOT23 (Type S) package of AH3323Q-SA-7 compatible with standard SOT23 footprints?

Yes-the SOT23 (Type S) package matches JEDEC TO-236AB outline dimensions (2.9 mm × 2.4 mm × 1.0 mm) and uses standard 1.9 mm pin pitch. Pin 1 (VDD) is at the top-left corner when the marking is upright; footprint compatibility is verified in Diodes' package outline DS46150 Rev. 2–2 page 11.