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Diodes Incorporated AH3329Q-P-B
- Part No.:
- AH3329Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3329Q-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:3,095
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Product details
Overview
AH3329Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified high-voltage Hall-effect unipolar switch IC for automotive position and proximity sensing. It operates from 3.0V to 28V, features BOP/BRP of 150–200G/125–180G (typ. 175G/150G), open-drain output with 60mA current limit, and supports -40°C to +150°C ambient operation - deployed in seatbelt buckles, gear position detection, and door/trunk closure systems.
For engineers reviewing the AH3329Q-P-B datasheet, AH3329Q-P-B pinout, AH3329Q-P-B application, or AH3329Q-P-B equivalent, this device delivers robust magnetic switching performance under automotive load-dump (40V) and ESD stress (8kV HBM), with chopper-stabilized architecture ensuring minimal thermal drift and reliable south-pole activation in SIP-3 Bulk Pack configuration.
Technical Context
The AH3329Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation, enabling stable operate/release thresholds across temperature. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, while the single open-drain output stage integrates overcurrent limiting and zener clamping on both VDD and OUTPUT pins.
Magnetic actuation is unipolar and polarity-sensitive: for SIP-3 (Bulk Pack), activation requires South pole applied to the part marking side, with hysteresis (BHY) of 18–35G (typ. 25G) preventing chatter near threshold. The device achieves 10µs power-on time and 4µs response delay, supporting fast mechanical feedback loops in safety-critical closures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - enables direct connection to automotive battery rails without external regulation. |
| Operate Point (BOP) | 150–200G (typ. 175G) - defines minimum South-pole field strength required to pull output low in SIP-3 package. |
| Release Point (BRP) | 125–180G (typ. 150G) - ensures clean turn-off with 25G typical hysteresis, rejecting noise-induced false triggers. |
| Output Type | Open-drain, 60mA current-limited - allows flexible pull-up selection and safe interfacing with 3.3V/5V/12V logic or microcontrollers. |
| Operating Temperature | -40°C to +150°C - validated for under-hood and cabin-mounted automotive locations per AEC-Q100 Grade 0. |
| Load Dump Protection | 40V transient rating - withstands ISO 7637-2 Pulse 5a without external protection circuitry. |
| ESD Robustness | HBM: 8kV, CDM: 1kV - exceeds automotive ESD immunity requirements for assembly and field operation. |
Pinout & Package
SIP-3 (Bulk Pack) package: 3-pin straight-lead surface-mount package with gull-wing leads, optimized for automated placement and high-reliability automotive solder joints. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0–28V with integrated reverse-blocking diode and 28V zener clamp. |
| 2 | GND | Ground reference - connects to system chassis or PCB ground plane; critical for magnetic field orientation reference. |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA when activated by sufficient South-pole flux; requires external pull-up resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to ±0.5G/°C, enabling stable switching across full -40°C to +150°C range. |
| Integrated protection network | Combines reverse-blocking diode, VDD/output zener clamps, and 60mA output current limit - eliminates need for discrete protection components. |
| South-pole activation (SIP-3) | Guarantees consistent magnetic polarity response when magnet is placed on marked side - simplifies mechanical integration in buckle and latch assemblies. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction temperature operation and PPAP-capable manufacturing in IATF 16949 facilities - meets OEM Tier-1 sourcing requirements. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detecting buckle insertion status in driver/passenger seats to enable airbag deployment logic and occupant classification. IC Role / Device Role / Timing Role: Unipolar Hall switch providing fail-safe, contactless ON/OFF signal synchronized to mechanical engagement. Use Value: Eliminates wear-prone microswitches; BOP/BRP tolerance ensures reliable detection despite magnet aging or misalignment in high-vibration environments. |
Use Scenario: Monitoring physical gear lever position in automatic transmission control modules to validate shift commands and prevent unintended gear engagement. IC Role / Device Role / Timing Role: Magnetic position sensor delivering deterministic edge-triggered output with <4µs response delay for real-time control loop timing. Use Value: High hysteresis (25G typ.) prevents oscillation during gear transition; 28V output clamp protects MCU inputs during transients. |
| Door/Trunk Closure Monitoring | Steering Column Lock Activation |
|
Use Scenario: Confirming full latching of vehicle doors or trunk lids to disable interior lighting and activate security systems. IC Role / Device Role / Timing Role: Proximity switch detecting magnet presence on striker plate, with open-drain output compatible with 12V body-control module inputs. Use Value: 3.0–28V operation supports direct battery connection; 40V load dump rating ensures survival during alternator surge events. |
Use Scenario: Verifying mechanical engagement of steering lock solenoid during vehicle start-up and immobilization sequences. IC Role / Device Role / Timing Role: Safety-critical position verifier providing redundant confirmation signal to immobilizer ECU alongside primary solenoid feedback. Use Value: AEC-Q100 Grade 0 qualification and 8kV HBM ESD rating ensure reliability in high-security, low-duty-cycle applications with long field life. |
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 |
|---|---|---|---|
| AL3329Q-P-B | Same magnetic thresholds (BOP/BRP), identical SIP-3 Bulk Pack, but uses Allegro's proprietary chopper architecture and lacks 40V load dump rating. | Valid for non-safety-critical cabin sensing; not qualified to AEC-Q100 Grade 0. | Select only if cost sensitivity outweighs automotive qualification and transient robustness requirements. |
| DRV5013AQDBZR | TI device offers programmable BOP/BRP via external resistor, wider 2.7–38V supply, but higher quiescent current (5mA vs. 4mA max) and no integrated zener clamps. | Suitable for mixed automotive/industrial designs requiring field tuning; requires external protection components. | Choose when adjustable sensitivity is mandatory and board space allows added protection circuitry. |
Compared with AL3329Q-P-B and DRV5013AQDBZR, the AH3329Q-P-B provides certified AEC-Q100 Grade 0 operation, built-in 40V load dump resilience, and zero-external-protection functionality - making it optimal for cost-constrained, high-reliability automotive closure and safety interlock systems.
Availability
AH3329Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3329Q-P-B 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 manufacturer of discrete semiconductors and ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets with IATF 16949-certified fabrication and test facilities.
The AH332XQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in harsh environments where AEC-Q100 compliance, wide voltage operation, and magnetic stability are mandatory.
FAQ
What is the magnetic polarity requirement for AH3329Q-P-B activation?
The AH3329Q-P-B in SIP-3 Bulk Pack configuration requires a South pole applied to the part marking side to activate the output. This polarity alignment is fixed per package type and confirmed in the datasheet's magnetic characteristics table and pin diagram. Reversing polarity will prevent switching.
Does AH3329Q-P-B require an external pull-up resistor?
Yes - the device has an open-drain output and must be used with an external pull-up resistor (RL) connected between VDD and OUTPUT. The recommended value ranges from 1kΩ to 10kΩ depending on rise time and bus voltage; 10kΩ is typical for 12V systems to limit current while maintaining <1µs rise time with 20pF load.
Can AH3329Q-P-B operate directly from a 24V truck battery system?
Yes - its 3.0V to 28V operating range and 40V absolute maximum supply rating allow direct connection to 24V nominal truck/bus battery systems. The integrated reverse-blocking diode and zener clamp protect against reverse polarity and load dump transients per ISO 7637-2 without external components.
Is AH3329Q-P-B pin-compatible with other AH332XQ variants?
Yes - all AH332XQ devices share identical SIP-3 (Bulk Pack) pinout (VDD-GND-OUTPUT), same footprint, and identical electrical interface. Only magnetic thresholds (BOP/BRP) differ across variants; no layout or schematic changes are needed when substituting within the family for sensitivity tuning.
AH3329Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 20mT Trip, 12.5mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3329Q-P-B FAQ
1.How can I place an order for AH3329Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3329Q-P-B 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 AH3329Q-P-B reliable?
The price and inventory of AH3329Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3329Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3329Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3329Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3329Q-P-B?
AH3329Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3329Q-P-B 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 AH3329Q-P-B?
For technical support, including AH3329Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3329Q-P-B requirements.
6.How does Aetrix verify that AH3329Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3329Q-P-B 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 AH3329Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3329Q-P-B?
All AH3329Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3329Q-P-B, 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 AH3329Q-P-B part is unused and in its original packaging.
Return procedure for AH3329Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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