Diodes Incorporated AH3327Q-SA-7

Overview

AH3327Q-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 proximity sensing in seatbelt buckles and gear position detection. It operates from 3.0V to 28V, features 95–140G operate point (BOP), 70–120G release point (BRP), 18–36G hysteresis, and delivers <0.4V output saturation voltage at 20mA.

For engineers reviewing the AH3327Q-SA-7 datasheet, AH3327Q-SA-7 pinout, AH3327Q-SA-7 application, or AH3327Q-SA-7 equivalent, this device supports robust magnetic switching in high-temperature automotive environments with reverse supply protection, zener clamping, and chopper-stabilized temperature compensation across −40°C to +150°C.

Technical Context

The AH3327Q implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling stable magnetic threshold performance over temperature and supply voltage variation. Its open-drain output uses an integrated power switch with current limiting and zener clamping on both VDD and OUTPUT pins.

It employs unipolar South-pole activation logic: output pulls low when perpendicular magnetic flux exceeds BOP (95–140G), remains latched until flux falls below BRP (70–120G), and exhibits 18–36G hysteresis to prevent chatter. For SOT23 (Type S) packaging, activation requires South pole applied to the part-marking side.

Key Specifications

Pinout & Package

SOT23 (Type S) package: 3-pin surface-mount, 2.9 mm × 2.4 mm footprint, 1.0 mm max height, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3327QSA-7 and TLE4913-2XUMA1, the AH3327Q-SA-7 uniquely combines Grade 0 temperature rating, 3.0–28V operation, integrated reverse protection, and 8kV HBM ESD-making it optimal for safety-critical, high-reliability automotive proximity sensing where supply instability and thermal stress are dominant design constraints.

Availability

AH3327Q-SA-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and steering column lock applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3327Q-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 company specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and consumer markets, with ISO/TS 16949 and IATF 16949 certified manufacturing.

The AH332XQ product line delivers AEC-Q100 qualified Hall-effect switches optimized for contactless position and proximity sensing in harsh automotive environments, emphasizing thermal stability, supply resilience, and functional safety readiness.

FAQ

What magnetic polarity activates the AH3327Q-SA-7?

The AH3327Q-SA-7 is a unipolar South-pole-activated device. For its SOT23 (Type S) package, the South pole must be presented to the part-marking side of the IC to trigger output turn-on. This configuration is confirmed in the datasheet's magnetic polarity diagrams and pinout illustrations for SOT23 and SIP-3 packages.

Does the AH3327Q-SA-7 require an external pull-up resistor?

Yes-the AH3327Q-SA-7 features a single open-drain output that requires an external pull-up resistor (typically 1kΩ to 10kΩ) connected between VDD and the OUTPUT pin. Without it, the output cannot achieve a valid high logic level; the datasheet recommends RL = 1kΩ for timing-critical applications with CL = 20pF.

Can the AH3327Q-SA-7 withstand automotive load dump events?

Yes-the device is rated for 40V transient supply voltage (absolute maximum), meeting ISO 7637-2 Pulse 5a requirements for 12V and 24V automotive systems. This rating applies to ≤100ms duration transients; sustained operation above 28V is not recommended per the Recommended Operating Conditions table.

Is the AH3327Q-SA-7 compatible with lead-free reflow soldering?

Yes-it is fully RoHS compliant, lead-free, and halogen-free ("Green" device), qualified for standard Pb-free reflow profiles including JEDEC J-STD-020D. The SOT23 (Type S) package supports peak reflow temperatures up to 260°C for 30 seconds, with MSL Level 1 rating per J-STD-020.