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Diodes Incorporated AH3324Q-SA-7
- Part No.:
- AH3324Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3324Q-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,532
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Product details
Overview
AH3324Q-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, features 80G typical operate point (BOP), 60G typical release point (BRP), and delivers open-drain output with 60mA current limit and <0.4V on-state voltage at 20mA load.
For engineers reviewing the AH3324Q-SA-7 datasheet, AH3324Q-SA-7 pinout, AH3324Q-SA-7 application, or AH3324Q-SA-7 equivalent, this device supports robust magnetic sensing in high-temperature automotive environments where supply stability, ESD immunity (8kV HBM), and load-dump tolerance (40V transient) are critical selection criteria.
Technical Context
The AH3324Q-SA-7 uses chopper-stabilized architecture with dynamic offset cancellation to achieve minimal switch-point drift across −40°C to +150°C ambient. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP hysteresis of 20G typical over full voltage and temperature range.
It integrates reverse-blocking diode, zener clamps on VDD and OUTPUT pins, and overcurrent protection-enabling direct connection to 12V/24V automotive buses without external protection components. Magnetic polarity response is defined relative to part marking side: South pole activation required on SOT23 (Type S) top surface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BOP (Operate Point) | 60–100 G typical 80 G: triggers output low when sufficient South pole field applied to marked side |
| BRP (Release Point) | 40–80 G typical 60 G: ensures clean hysteresis margin prevents chatter near threshold |
| VDD Range | 3.0 V to 28 V: supports direct connection to 12V/24V vehicle batteries including cold-crank and load-dump transients |
| VOUT_ON | ≤ 0.4 V at 20 mA: guarantees logic-low compatibility with standard 3.3V/5V microcontroller inputs |
| tD (Response Delay) | 4 µs typical: enables real-time detection of fast mechanical actuation such as gear shift or buckle latch |
| ESD HBM | 8 kV: meets stringent automotive assembly and handling requirements without additional protection |
| Operating Temp | −40°C to +150°C: validated for under-hood and cabin-mounted applications per AEC-Q100 Grade 0 |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, 2.9 mm × 2.4 mm × 1.0 mm body, gull-wing leads, moisture sensitivity level 1 (MSL1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 28V zener clamp; accepts 3–28V DC |
| 2 | GND | Ground reference for internal regulator, sensor, and output stage; must be low-impedance |
| 3 | OUTPUT | Open-drain NMOS output with 60mA current limit and 28V zener clamp; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to ±5G over −40°C to +150°C, eliminating manual calibration |
| 40V load dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count |
| South-pole activation (marked side) | Enables consistent mechanical integration in seatbelt buckle housings where magnet orientation is fixed |
| 10µs power-on time | Ensures valid output state within 10µs after VDD reaches 3V-critical for fast-responding safety systems |
| RF noise immunity | Validated against 100 MHz–1 GHz radiated RF fields per ISO 11452-2, minimizing false triggers |
Applications
| Seatbelt Buckle Detection | Gear Stick Position Sensing |
|---|---|
Use Scenario: Detect buckle engagement status in automotive seating systems with mechanical reliability and zero contact wear. IC Role / Device Role / Timing Role: Unipolar Hall switch providing latched ON/OFF signal based on magnet proximity during buckle insertion. Use Value: Eliminates mechanical switches prone to corrosion and bounce; operates reliably at 150°C near cabin heaters. |
Use Scenario: Identify PRNDL position in manual or automatic transmission gear sticks without moving contacts. IC Role / Device Role / Timing Role: Magnetic position detector with 4µs response delay ensuring accurate gear selection feedback before shift completion. Use Value: Enables fail-safe gear indicator logic with AEC-Q100 Grade 0 qualification and 8kV ESD robustness. |
| Steering Column Lock Verification | Door/Trunk Closure Monitoring |
Use Scenario: Confirm mechanical engagement of steering lock actuator during vehicle start-up and immobilization sequences. IC Role / Device Role / Timing Role: Proximity sensor verifying solenoid-driven lock pin position via calibrated South-pole field detection. Use Value: Supports ASIL-B relevant functions with guaranteed hysteresis (20G typ) preventing false unlock signals. |
Use Scenario: Monitor door or trunk lid closure status for anti-pinch, lighting control, and alarm triggering. IC Role / Device Role / Timing Role: Contactless switch detecting magnet presence on latch mechanism using open-drain output compatible with 12V wake-up circuits. Use Value: Delivers >100,000-cycle reliability vs. mechanical microswitches; immune to dust, moisture, and vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3324QSA-7 | Same BOP/BRP specs but lower ESD rating (4kV HBM), no AEC-Q100 qualification | Restricted to non-safety-critical consumer or industrial use; not PPAP-capable | Select only for cost-sensitive non-automotive designs where qualification and robustness are secondary |
| TLE4913-2K | Higher BOP (120G min), bipolar operation, integrated pull-up, no zener clamp on VDD | Requires external reverse-protection diode for 24V load-dump; unsuitable for space-constrained buckle modules | Prefer when higher magnetic immunity is needed and board area allows discrete protection components |
Compared with AL3324QSA-7 and TLE4913-2K, the AH3324Q-SA-7 uniquely combines AEC-Q100 Grade 0, 40V load-dump tolerance, and SOT23 footprint-making it the only drop-in solution for space-limited, safety-relevant automotive proximity sensing where qualification and protection are mandatory.
Availability
AH3324Q-SA-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear stick position sensing, and steering column lock verification requiring stable component supply across automotive production lifecycles.
Supply support for AH3324Q-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 solutions for automotive, industrial, and computing markets.
The AH332XQ series belongs to Diodes' AEC-Q100-qualified Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in harsh automotive environments with extended temperature and voltage requirements.
FAQ
What is the magnetic polarity requirement for AH3324Q-SA-7 activation?
The AH3324Q-SA-7 requires a South pole applied to the part marking side of the SOT23 (Type S) package to activate the output. This is confirmed in the datasheet's magnetic characteristics table and pin diagram. Applying North pole or misorienting the magnet results in no switching action. Polarity direction is fixed per package type and cannot be reversed via configuration.
Does AH3324Q-SA-7 require an external pull-up resistor on the OUTPUT pin?
Yes, the OUTPUT pin is open-drain and requires an external pull-up resistor to VDD or another logic rail. The datasheet recommends RL = 1kΩ for optimal rise time (0.2–1 µs) with 20pF load capacitance. Pull-up values outside 1kΩ–10kΩ may increase rise time or reduce noise immunity, especially in high-EMI automotive harness environments.
Can AH3324Q-SA-7 operate directly from a 24V truck battery without external regulation?
Yes, AH3324Q-SA-7 supports 3.0V to 28V continuous operation and withstands 40V transients per ISO 7637-2 Pulse 5a. Its integrated reverse-blocking diode and VDD zener clamp eliminate need for external regulators or TVS diodes in most 24V commercial vehicle applications, provided PCB layout maintains adequate thermal dissipation at high ambient temperatures.
How does the chopper stabilization architecture improve performance in automotive environments?
Chopper stabilization dynamically cancels offset voltage in the Hall sensor amplifier, reducing BOP/BRP drift to ±5G over −40°C to +150°C. This eliminates thermal recalibration needs and ensures consistent switching thresholds across engine bay temperature swings, unlike non-chopped Hall switches that exhibit >20G drift-critical for reliable seatbelt or gear position detection.
AH3324Q-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 10mT Trip, 4mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 60mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3324Q-SA-7 FAQ
1.How can I place an order for AH3324Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3324Q-SA-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AH3324Q-SA-7 reliable?
The price and inventory of AH3324Q-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3324Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3324Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3324Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3324Q-SA-7?
AH3324Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3324Q-SA-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AH3324Q-SA-7?
For technical support, including AH3324Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3324Q-SA-7 requirements.
6.How does Aetrix verify that AH3324Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3324Q-SA-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH3324Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3324Q-SA-7?
All AH3324Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3324Q-SA-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AH3324Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3324Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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