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Diodes Incorporated AH3327Q-P-B
- Part No.:
- AH3327Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3327Q-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:4,068
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Product details
Overview
AH3327Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC designed for position and proximity sensing in harsh environments. It operates from 3.0V to 28V, features open-drain output with 60mA current limit, delivers BOP = 95–140G and BRP = 70–120G typical magnetic thresholds, 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 AH3327Q-P-B datasheet, AH3327Q-P-B pinout, AH3327Q-P-B application, or AH3327Q-P-B equivalent, this device requires attention to magnetic polarity orientation (South pole activation side varies by package), load-dump immunity (40V transient), chopper-stabilized temperature stability, and SIP-3 bulk-pack mechanical mounting constraints.
Technical Context
The AH3327Q-P-B uses a chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects on switching points. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP hysteresis (18–36G) across -40°C to +150°C.
It integrates reverse-blocking diode, supply and output zener clamps, and overcurrent-limited open-drain output. Magnetic actuation is unipolar: South pole applied to the part-marking side activates the output (low) for SIP-3 packages - polarity differs for SC59/SOT23 (non-marking side).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - powers directly from automotive battery/rail without external regulation |
| Operating Temperature | -40°C to +150°C - meets under-hood and cabin module thermal requirements |
| BOP / BRP (Typical) | 115G / 90G - enables reliable detection of moderate-strength magnets at mechanical air gaps up to ~3mm |
| Hysteresis (BHY) | 25G typical - prevents chatter during slow magnetic transitions near threshold |
| Output Type | Open-drain, 60mA current-limited - interfaces directly with 3.3V/5V/12V microcontroller inputs or relay drivers |
| Load Dump Protection | 40V transient rating - withstands ISO 7637-2 Pulse 5a without external TVS |
| ESD Robustness | HBM 8kV, CDM 1kV - survives handling and assembly in automotive production lines |
Pinout & Package
Package: SIP-3 (Bulk Pack), 3-pin straight-lead surface-mount package with gull-wing leads; footprint compatible with JEDEC TO-92 variant layouts but optimized for automated placement and high-vibration retention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 28V zener clamp - accepts direct connection to 12V/24V battery rail |
| 2 | GND | Ground reference for internal regulator, Hall sensor, and output stage - must be low-impedance path to system ground plane |
| 3 | OUTPUT | Open-drain NMOS output with 60mA current limit and 28V zener clamp - requires external pull-up to VDD or logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized sensing | Reduces thermal drift of BOP/BRP to ±0.5G/°C - eliminates need for external calibration in production |
| Integrated supply protection | Reverse-blocking diode + 28V zener clamp on VDD - removes discrete protection components from BOM |
| Output-stage robustness | 60mA current limit + 28V zener clamp on OUTPUT - sustains short-circuit events and inductive kickback |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation and PPAP-ready - satisfies Tier-1 OEM functional safety readiness for body electronics |
| Magnetic polarity mapping | South-pole activation on marking side for SIP-3 - simplifies mechanical integration with standard magnet orientations |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion status in automotive seating systems using a small neodymium magnet embedded in the tongue. IC Role / Device Role / Timing Role: Unipolar Hall switch providing fail-safe occupancy and restraint status to airbag control unit (ACU). Use Value: 90G release point ensures clean release when buckle unlatches; 25G hysteresis prevents false toggling during vibration. |
Use Scenario: Monitor physical gear lever position in automatic transmission assemblies with magnet-embedded detent plates. IC Role / Device Role / Timing Role: Proximity sensor feeding discrete position states (P/R/N/D) to transmission control module (TCM). Use Value: 115G operate point accommodates magnet aging and temperature-induced flux loss over 15-year vehicle life. |
| Door/Trunk Closure Monitoring | Steering Column Lock Activation |
|
Use Scenario: Confirm full latch engagement in power-operated doors and liftgates using magnets mounted on striker plates. IC Role / Device Role / Timing Role: Contactless switch signaling closed state to body control module (BCM) for interior lighting and alarm arming. Use Value: 28V zener-clamped output tolerates 12V system transients during motor stall events without latch-up. |
Use Scenario: Sense immobilizer lock cylinder rotation via magnet on steering column shaft in anti-theft systems. IC Role / Device Role / Timing Role: Security-critical position detector enabling/disabling starter circuit based on key authentication and mechanical alignment. Use Value: AEC-Q100 Grade 0 qualification ensures reliability at 150°C ambient - critical for under-dash thermal zones. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3327Q-P-B | Same magnetic thresholds (BOP/BRP), identical SIP-3 package, but lacks AEC-Q100 qualification and 40V load dump rating | Restricted to non-safety-critical consumer or industrial use; not approved for automotive body modules | Select only for cost-sensitive non-automotive designs where qualification and transient immunity are not required |
| TLE4913-2SA | Higher BOP (150G min), wider hysteresis (30G), but narrower voltage range (4.5–24V) and no 40V load dump rating | Suitable for high-air-gap gear sensing but requires external TVS for ISO 7637-2 compliance | Prefer when detecting weak fields or needing larger hysteresis; verify external protection for 12V system transients |
Compared with AL3327Q-P-B, AH3327Q-P-B adds AEC-Q100 Grade 0 validation and 40V transient tolerance - essential for OEM body electronics. Against TLE4913-2SA, it trades slightly lower sensitivity for broader supply range and integrated protection, reducing system-level component count.
Availability
AH3327Q-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 AH3327Q-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' automotive Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in AEC-Q100-compliant body electronics modules.
FAQ
What is the correct magnet polarity and orientation for AH3327Q-P-B activation?
The AH3327Q-P-B uses SIP-3 (Bulk Pack) packaging, requiring a South pole applied to the part-marking side to activate the output. This differs from SC59/SOT23 variants, which require South pole on the non-marking side. Magnetic field must be perpendicular to the package surface, with minimum BOP of 95G to ensure reliable turn-on across temperature.
Does AH3327Q-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 to VDD or another logic-compatible rail. Recommended pull-up values range from 1kΩ to 10kΩ depending on rise time and bus loading requirements. A 4.7kΩ resistor is typical for 12V systems with <100ns rise time targets.
Can AH3327Q-P-B operate reliably at 28V continuous supply voltage?
Yes - 28V is within its specified continuous operating range (3.0V to 28V). The 40V absolute maximum rating applies only to transient load-dump events ≤100ms. At 28V, supply current remains ≤5mA across -40°C to +150°C, and output saturation voltage stays ≤0.4V at 20mA load.
How does the chopper stabilization architecture improve performance over conventional Hall switches?
Chopper stabilization dynamically cancels offset voltage in the Hall element and amplifier chain, reducing BOP/BRP drift to <0.5G/°C and eliminating zero-point shift due to mechanical stress or thermal gradients. This enables single-point calibration in production and eliminates field failures caused by magnetic threshold migration over temperature or lifetime.
AH3327Q-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:
- 14mT Trip, 7mT 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
AH3327Q-P-B FAQ
1.How can I place an order for AH3327Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3327Q-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 AH3327Q-P-B reliable?
The price and inventory of AH3327Q-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 AH3327Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3327Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3327Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3327Q-P-B?
AH3327Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3327Q-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 AH3327Q-P-B?
For technical support, including AH3327Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3327Q-P-B requirements.
6.How does Aetrix verify that AH3327Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3327Q-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 AH3327Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3327Q-P-B?
All AH3327Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3327Q-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 AH3327Q-P-B part is unused and in its original packaging.
Return procedure for AH3327Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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