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Diodes Incorporated AH3321Q-P-B
- Part No.:
- AH3321Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3321Q-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:1,140
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Product details
Overview
AH3321Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC in SIP-3 (Bulk Pack) package, operating from 3.0V to 28V supply, with BOP = 235–300 G and BRP = 210–275 G, delivering open-drain switching for seatbelt buckle detection and door/trunk closure sensing under harsh under-hood conditions.
For engineers reviewing the AH3321Q-P-B datasheet, AH3321Q-P-B pinout, AH3321Q-P-B application, or AH3321Q-P-B equivalent, this device supports high-voltage automotive proximity sensing where magnetic hysteresis ≥17 G, load dump tolerance up to 40 V, and operation across −40°C to +150°C ambient are required.
Technical Context
The AH3321Q-P-B uses chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects, enabling stable magnetic switching thresholds over temperature. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring consistent BOP/BRP performance across −40°C to +150°C.
It features a single open-drain output with 30–55 mA current limiting and zener clamps on both VDD and OUTPUT pins, plus reverse-blocking diode protection. Magnetic actuation requires South pole applied to the part marking side for SIP-3 packages, with hysteresis of 17–36 G to prevent chatter near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BOP (Operate Point) | 235–300 G - triggers output low when South pole exceeds this flux density at marking side |
| BRP (Release Point) | 210–275 G - releases output high only after flux drops below this level, ensuring noise immunity |
| VDD Range | 3.0–28 V - supports direct battery connection in 12 V/24 V automotive systems |
| Load Dump Rating | 40 V transient - withstands ISO 7637-2 pulse 5a without external protection |
| Output Type | Open-drain - enables wired-OR configuration and flexible pull-up voltage selection |
| Operating Temp | −40°C to +150°C - qualified for engine bay and transmission control module placement |
| ESD Robustness | HBM 8 kV / CDM 1 kV - meets stringent automotive ESD requirements for assembly and field use |
Pinout & Package
SIP-3 (Bulk Pack) package: 3-pin straight-lead, surface-mount package with 2.54 mm pitch, optimized for automated insertion and high-reliability automotive harness interfaces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 28 V zener clamp |
| 2 | GND | Reference return path for internal regulator and output stage |
| 3 | OUTPUT | Open-drain NMOS output with 30–55 mA current limit and 28 V zener clamp |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to ±5 G over full temperature range |
| South-pole activation (marking side) | Enables deterministic mounting orientation in seatbelt and door latch assemblies |
| 40 V load dump tolerance | Eliminates need for external TVS in 24 V commercial vehicle power networks |
| 10 µs power-on time | Ensures valid output state within 10 µs after VDD reaches 3 V, supporting fast wake-up |
| AEC-Q100 Grade 0 | Qualified for ambient temperatures up to +150°C, suitable for transmission and engine control units |
Applications
| Seatbelt Buckle Detection | Door/Trunk Closure Sensing |
|---|---|
Use Scenario: Detect buckle engagement status in automotive seating systems using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Unipolar Hall switch providing logic-level output indicating mechanical latch position. Use Value: High BOP (275 G typ.) rejects stray fields while ensuring reliable actuation with small magnets at air gaps up to 3.5 mm. | Use Scenario: Monitor door or trunk lid closed/open state in body control modules via magnetic reed replacement. IC Role / Device Role / Timing Role: Solid-state proximity detector replacing electromechanical switches in weather-exposed locations. Use Value: −40°C to +150°C operation and 8 kV HBM ESD rating ensure long-term reliability in exterior mounting environments. |
| Steering Column Lock Verification | HVAC Actuator Position Feedback |
Use Scenario: Confirm immobilizer lock/unlock state in steering column assemblies using rotating cam magnet. IC Role / Device Role / Timing Role: Magnetic threshold detector interfacing directly with microcontroller GPIO. Use Value: 17–36 G hysteresis prevents contact bounce during slow mechanical transitions and eliminates software debouncing. | Use Scenario: Sense damper vane position in HVAC blend door actuators with limited space and high vibration. IC Role / Device Role / Timing Role: Low-power Hall switch supplying position confirmation to HVAC controller MCU. Use Value: 3 mA typical supply current at +25°C and chopper-stabilized design maintain accuracy across thermal cycling in dashboard enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3321Q-P-B | Same BOP/BRP specs and SIP-3 package; identical pinout and electrical behavior | No functional difference; alternate manufacturer marking per Diodes' dual-sourcing policy | Select when AL3321Q-P-B is preferred for supply chain diversification without design change |
| TLE4913-2XUMA1 | Higher BOP (300–400 G), no built-in zener clamp on VDD, requires external TVS for 40 V load dump | Designed for higher-field industrial encoders; lacks AEC-Q100 Grade 0 qualification | Use only if system-level protection is already implemented and Grade 0 qualification is not mandatory |
Compared with AL3321Q-P-B, AH3321Q-P-B offers identical performance and qualification but distinct traceability; versus TLE4913-2XUMA1, it provides integrated 40 V load dump protection and guaranteed Grade 0 operation-critical for OEM-compliant automotive modules.
Availability
AH3321Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, door/trunk closure monitoring, and steering lock verification requiring stable component supply across automotive production lifecycles.
Supply support for AH3321Q-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 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 robust, high-voltage position and proximity sensing in automotive powertrain, body, and chassis systems.
FAQ
What magnetic polarity activates the AH3321Q-P-B in SIP-3 package?
The AH3321Q-P-B in SIP-3 (Bulk Pack) requires a South pole applied to the part marking side to activate. This is confirmed in the magnetic characteristics table and pin diagram for SIP-3 variants. Applying North pole or misorienting the magnet results in no switching action.
Does AH3321Q-P-B require an external pull-up resistor on the OUTPUT pin?
Yes - the OUTPUT pin is open-drain and must be pulled up externally. The datasheet recommends RL between 1 kΩ and 10 kΩ depending on rise time and bus voltage. Typical designs use 4.7 kΩ to 24 V or 10 kΩ to 3.3 V microcontroller I/O lines.
Can AH3321Q-P-B operate reliably at 28 V continuous supply?
Yes - 28 V is within its recommended operating range (3.0 V to 28 V). The absolute maximum VDD is 40 V (transient only), but sustained 28 V operation is fully characterized and supported across −40°C to +150°C ambient per the Recommended Operating Conditions table.
Is the SIP-3 (Bulk Pack) variant compatible with wave soldering processes?
Yes - the SIP-3 (Bulk Pack) package is rated for standard lead-free wave soldering profiles per J-STD-020. Its straight-lead configuration and Pb-free/RoHS/Green compliance support automated through-hole assembly in automotive harness modules and body control units.
AH3321Q-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:
- 27.5mT Trip, 25mT 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:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3321Q-P-B FAQ
1.How can I place an order for AH3321Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3321Q-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 AH3321Q-P-B reliable?
The price and inventory of AH3321Q-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 AH3321Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3321Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3321Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3321Q-P-B?
AH3321Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3321Q-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 AH3321Q-P-B?
For technical support, including AH3321Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3321Q-P-B requirements.
6.How does Aetrix verify that AH3321Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3321Q-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 AH3321Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3321Q-P-B?
All AH3321Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3321Q-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 AH3321Q-P-B part is unused and in its original packaging.
Return procedure for AH3321Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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