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Diodes Incorporated AH3322Q-SA-7
- Part No.:
- AH3322Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3322Q-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,209
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Product details
Overview
AH3322Q-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 harsh environments. It operates from 3.0V to 28V, features 30G typical operate point (BOP), 20G typical release point (BRP), open-drain output with 60mA current limit, and functions reliably from −40°C to +150°C - deployed in seatbelt buckles and gear stick position detection.
For engineers reviewing the AH3322Q-SA-7 datasheet, AH3322Q-SA-7 pinout, AH3322Q-SA-7 application, or AH3322Q-SA-7 equivalent, this device delivers verified magnetic switching performance, load-dump robustness, chopper-stabilized temperature stability, and automotive-grade ESD immunity - critical for safety-critical cabin and powertrain subsystems.
Technical Context
The AH3322Q-SA-7 uses a chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects on magnetic thresholds. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring stable BOP/BRP across −40°C to +150°C.
It implements a single open-drain output with integrated overcurrent limiting (30–55mA), zener clamps on VDD and OUTPUT pins, and reverse-blocking diode protection. Magnetic actuation requires South pole applied to the part marking side for SOT23 (Type S), enabling deterministic unipolar switching in space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to automotive battery rail including cold-crank and load-dump transients. |
| Operate Point (BOP) | 15G to 45G typ. 30G - enables reliable activation with low-strength magnets near metal housings in seatbelt or door latch assemblies. |
| Release Point (BRP) | 5G to 35G typ. 20G - provides 10G minimum hysteresis to prevent chatter during slow magnetic field transitions. |
| Output Type | Open-drain with 60mA continuous rating - interfaces directly with 3.3V/5V/12V microcontroller GPIO or external pull-up networks. |
| Startup Time | 10µs typical - ensures fast system readiness after ignition power-on, meeting ASAM timing requirements for body control modules. |
| ESD Robustness | HBM 8kV / CDM 1kV - exceeds ISO 10605 requirements for in-vehicle assembly and service handling. |
| Operating Temperature | −40°C to +150°C - qualified for under-hood and cabin applications including HVAC actuators and transmission sensors. |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, 2.9mm × 2.4mm footprint, 1.0mm max height, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0V–28V with integrated reverse-blocking diode and 40V transient clamp. |
| 2 | GND | Ground reference - connects to chassis or PCB ground plane; serves as return path for internal regulator and output stage. |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA when activated by South pole; requires external pull-up for logic-level interface. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized sensing | Reduces thermal drift of BOP/BRP to ±0.5G/°C, enabling stable switching across full automotive temperature range. |
| 40V load dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS, simplifying front-end protection design in 12V/24V systems. |
| South-pole actuation (marking side) | Enables consistent mechanical integration in SOT23-mounted assemblies where magnet orientation is fixed relative to PCB silkscreen. |
| Zener clamps on VDD and OUTPUT | Prevents latch-up and damage during ESD events or inductive kickback from relay coils or motor drivers. |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C junction temperature - suitable for engine bay, transmission, and HVAC compressor locations. |
Applications
| Seatbelt Buckle Detection | Steering Column Lock Sensing |
|---|---|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Unipolar Hall switch providing ON/OFF status signal to body control module (BCM) via open-drain GPIO. Use Value: Eliminates mechanical switches prone to wear; operates reliably through vibration, dust, and temperature cycling per ISO 16750. |
Use Scenario: Confirm mechanical engagement of steering lock solenoid during vehicle start-up and shutdown sequences. IC Role / Device Role / Timing Role: Position feedback element verifying lock/unlock state to immobilizer controller with <10µs response latency. Use Value: Enables fail-safe anti-theft function with guaranteed operation at −40°C ambient and 150°C under-hood conditions. |
| Gear Stick Position Monitoring | Door/Trunk Closure Sensing |
Use Scenario: Sense P/R/N/D positions in manual or automated manual transmissions using magnet-actuated lever mechanism. IC Role / Device Role / Timing Role: Magnetic threshold detector feeding discrete position states to transmission control unit (TCU) via pull-up resistor network. Use Value: Provides noise-immune digital position feedback without contact wear, supporting ASIL-B functional safety decomposition. |
Use Scenario: Monitor latched vs. unlatched state of doors, liftgates, or hoods using magnet-in-latch and PCB-mounted sensor. IC Role / Device Role / Timing Role: Proximity switch generating wake-up interrupt to door module microcontroller upon closure event. Use Value: Enables low-power occupancy detection with <0.1µA leakage current in OFF state, extending battery life in key-off mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3322QSA-7 | Same pinout and sensitivity (30G BOP), but lower ESD rating (HBM 4kV vs. 8kV) and no AEC-Q100 Grade 0 certification. | Limited to non-safety-critical interior modules; not approved for powertrain or steering systems. | Select only for cost-sensitive infotainment or lighting controls where full automotive qualification is unnecessary. |
| TLE4913-2XUMA1 | Higher BOP (60G typ.), SC-59 package, integrated reverse polarity protection, but no 40V load dump rating. | Better suited for high-magnetic-noise environments like alternator proximity; requires external TVS for load dump compliance. | Choose when higher magnetic immunity is needed and external protection can be added; avoid if board space is constrained. |
Compared with AL3322QSA-7 and TLE4913-2XUMA1, the AH3322Q-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 cabin sensing nodes requiring zero external protection components.
Availability
AH3322Q-SA-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, steering column lock verification, and gear stick position monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3322Q-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 solutions for automotive, industrial, and consumer markets.
The AH332XQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for robust, high-temperature position and proximity sensing in safety-critical vehicle subsystems.
FAQ
What magnetic polarity activates the AH3322Q-SA-7?
The AH3322Q-SA-7 is activated by the South pole applied to the part marking side of the SOT23 (Type S) package. This orientation is confirmed in the datasheet's magnetic characteristics table and pin diagram. Applying North pole or reversing magnet placement results in no switching action. The device does not respond to axial fields - only perpendicular flux density exceeding BOP triggers output low.
Does the AH3322Q-SA-7 require an external pull-up resistor?
Yes - the AH3322Q-SA-7 has an open-drain output and requires an external pull-up resistor to VDD or another logic rail. Typical values range from 1kΩ to 10kΩ depending on rise time and bus capacitance. The datasheet recommends RL = 1kΩ for 0.2–1µs rising time with 20pF load. No internal pull-up is present; omission causes undefined logic levels and system malfunction.
Can the AH3322Q-SA-7 operate directly from a 24V truck battery?
Yes - the AH3322Q-SA-7 supports 3.0V to 28V supply voltage and includes 40V transient-rated protection on VDD. It withstands ISO 7637-2 Pulse 5a (load dump) up to 40V for ≤100ms without external components. For sustained 24V operation, ensure ambient temperature remains within −40°C to +150°C and power dissipation stays below 230mW at 25°C ambient.
Is the AH3322Q-SA-7 pin-compatible with other AH332XQ variants?
Yes - all AH332XQ variants (AH3322Q through AH3321Q) share identical SOT23 (Type S) pinout, package dimensions, and electrical interface. Only magnetic sensitivity (BOP/BRP) differs between part numbers. System-level replacement is possible without layout change, provided the new variant's operate/release points match the mechanical magnet placement and air gap in the target application.
AH3322Q-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:
- 4.5mT Trip, 0.5mT 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
AH3322Q-SA-7 FAQ
1.How can I place an order for AH3322Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3322Q-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 AH3322Q-SA-7 reliable?
The price and inventory of AH3322Q-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 AH3322Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3322Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3322Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3322Q-SA-7?
AH3322Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3322Q-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 AH3322Q-SA-7?
For technical support, including AH3322Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3322Q-SA-7 requirements.
6.How does Aetrix verify that AH3322Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3322Q-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 AH3322Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3322Q-SA-7?
All AH3322Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3322Q-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 AH3322Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3322Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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