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Diodes Incorporated AH3233Q-P-B
- Part No.:
- AH3233Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3233Q-P-B.pdf
- Description:
- Hall Unipolar Switch SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:951
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Product details
Overview
AH3233Q-P-B from Diodes Incorporated is an AEC-Q100 qualified two-wire automotive Hall-effect unipolar switch IC with direct-output polarity, operating from 2.7V to 27V supply, ±1100 ppm/°C temperature coefficient, and magnetic operate point (BOP) of 27–63 G at +25°C - used for seatbelt buckle detection and gear position sensing in harsh-temperature vehicle systems.
For engineers reviewing the AH3233Q-P-B datasheet, AH3233Q-P-B pinout, AH3233Q-P-B application, or AH3233Q-P-B equivalent, this page delivers verified magnetic thresholds, thermal shutdown behavior, chopper-stabilized offset cancellation, and SIP-3 package terminal mapping - all confirmed against Diodes' DS41821 Rev. 6.
Technical Context
The AH3233Q-P-B implements a chopper-stabilized architecture with dynamic offset cancellation and an internal bandgap regulator to deliver temperature-compensated operation across –40°C to +150°C ambient. Its two-wire configuration integrates supply and output on a single current loop, eliminating separate signal lines.
As a unipolar switch, it activates on south-pole magnetic field exceeding BOP (27–63 G typ), holds state until flux drops below BRP (10–46 G typ), and features built-in reverse-voltage protection, UVLO (2.2–2.7 V), and thermal shutdown at +190°C junction temperature with auto-restart at +180°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports full automotive battery range including cold-crank (6 V) and load-dump (27 V) transients. |
| Operating Temperature | –40°C to +150°C - qualified for under-hood and cabin-mounted proximity sensing without external thermal derating. |
| BOP / BRP (25°C) | 27–63 G / 10–46 G - low-sensitivity unipolar threshold enables reliable detection with small magnets in tight mechanical gaps. |
| Temperature Coefficient | –1100 ppm/°C - tightly controlled magnetic switching point drift ensures consistent actuation across wide thermal excursions. |
| Supply Current (ON/OFF) | 12–17 mA ON / 5–6.9 mA OFF - two-wire current-loop output simplifies wiring while maintaining low quiescent power in sleep states. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - robustness against assembly handling and in-vehicle electrostatic discharge events. |
| Thermal Protection | Shuts down at TJ = +190°C, restarts at +180°C - prevents permanent damage during sustained overtemperature conditions. |
Pinout & Package
Package: SIP-3 (Bulk Pack), 3-pin single-inline package with straight leads, footprint compatible with standard through-hole PCB mounting and automated bulk-handling processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Supply voltage input - accepts 2.7–27 V; includes integrated zener clamp and reverse-blocking diode. |
| 2 | NC | No connection - electrically isolated; may be tied to VDD, GND, or left floating without affecting operation. |
| 3 | GND | Ground reference - forms return path for two-wire current-loop output and internal regulator reference. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates offset drift and enables <±3.3 µs output jitter under 1 kHz magnetic switching - critical for high-reliability position sampling. |
| Two-wire current-loop interface | Combines power and signal into one loop - reduces wiring count, connector pins, and EMI susceptibility in space-constrained automotive modules. |
| Integrated reverse-voltage & UVLO protection | Withstands –32 V reverse supply and disables output below 2.2 V - prevents false triggering during battery jump-start or brownout events. |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C ambient and +165°C junction - meets requirements for engine bay, transmission, and chassis-mounted sensors. |
| Lead-free, halogen-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with EU RoHS 2015/863/EU and automotive change-control mandates. |
Applications
| Seatbelt Buckle Detection | Transmission Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using a magnet embedded in the latch mechanism and AH3233Q-P-B mounted on the seat frame. IC Role / Device Role / Timing Role: Unipolar Hall switch providing discrete ON/OFF current-state output synchronized to magnetic presence - no timing or data protocol required. Use Value: Low BOP (27–63 G) enables use of miniature magnets; ±1100 ppm/°C coefficient ensures consistent trip point across cabin temperature swings (–40°C to +85°C). |
Use Scenario: Monitor rotational position of gear selector shaft in automatic transmissions via magnet-embedded cam and fixed AH3233Q-P-B sensor. IC Role / Device Role / Timing Role: Direct-polarity unipolar switch delivering analog-current-level indication of gear engagement state - immune to vibration-induced contact bounce. Use Value: 2.7–27 V operation tolerates battery fluctuations during shifting; thermal shutdown protects against under-hood heat soak (>125°C ambient). |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm door or trunk lid closure status in body control modules using magnet on striker plate and AH3233Q-P-B on pillar or latch housing. IC Role / Device Role / Timing Role: Two-wire proximity detector generating current-loop signal proportional to magnetic field strength - eliminates need for pull-up resistors or level-shifting. Use Value: NC pin flexibility allows mechanical layout optimization; HBM 8 kV ESD rating withstands repeated human-contact events during service access. |
Use Scenario: Sense wiper blade park position at base of windshield by detecting magnet on linkage arm with AH3233Q-P-B mounted on motor housing. IC Role / Device Role / Timing Role: Unipolar switch asserting current-state output when wiper reaches home position - provides deterministic end-stop feedback without encoder complexity. Use Value: 30–50 kHz max switching frequency supports rapid wiper cycling; chopper stabilization rejects EMI from adjacent motor commutation noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3232Q-P-B | Higher BOP (40–80 G) and same temperature coefficient (–1100 ppm/°C); identical SIP-3 package and pinout. | Better suited for larger air gaps or weaker magnets where higher sensitivity margin is needed. | Select when magnetic field strength exceeds 40 G at target actuation distance - avoids oversensitivity in noisy environments. |
| AH3234Q-P-B | Same BOP/BRP specs as AH3233Q-P-B but inverted output polarity; otherwise identical electrical and thermal performance. | Required where system logic expects active-low current-state signaling instead of active-high. | Choose only if host controller interprets low current as "closed" or "engaged" - no hardware redesign needed beyond polarity alignment. |
Compared with AH3232Q-P-B and AH3234Q-P-B, the AH3233Q-P-B offers the lowest magnetic operate point in the direct-output family, enabling detection with minimal magnet size or largest mechanical tolerance - ideal for cost-sensitive, space-constrained automotive closures.
Availability
AH3233Q-P-B is available at Aetrix Electronics and suitable for seatbelt buckle detection, transmission gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3233Q-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 manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets - with IATF 16949-certified manufacturing and AEC-Q100 product validation.
The AH323xQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for robust, two-wire position and proximity sensing in safety-critical vehicle subsystems - emphasizing thermal stability, ESD resilience, and supply-voltage fault tolerance.
FAQ
What is the function of Pin 2 (NC) on the AH3233Q-P-B?
Pin 2 is a no-connect terminal with no internal connection. It may be left floating, tied to VDD, or connected to GND without altering device operation - providing layout flexibility for PCB routing and mechanical mounting constraints in tight automotive enclosures.
Does AH3233Q-P-B require an external decoupling capacitor?
Yes - a minimum 100 nF ceramic capacitor must be placed between VDD and GND, located as close as possible to the IC pins. This stabilizes the internal bandgap regulator, suppresses supply noise, and ensures reliable chopper-stabilized operation under EMI-rich automotive conditions.
How does the two-wire interface of AH3233Q-P-B differ from conventional Hall switches?
Unlike three-wire Hall sensors, AH3233Q-P-B uses a single current loop: VDD supplies power and carries the output signal as modulated current (ON ≈12–17 mA, OFF ≈5–6.9 mA). This eliminates a dedicated output line, reducing connector cost and harness weight while maintaining noise immunity via current-mode signaling.
Is AH3233Q-P-B recommended for new designs?
No - Diodes Incorporated explicitly states "THE AH3231Q-AH3234Q/AH3270Q-AH3272Q ARE NOT RECOMMENDED FOR NEW DESIGNS." Customers initiating new projects should contact Diodes for next-generation alternatives; AH3233Q-P-B remains supported for existing production and legacy program continuity.
AH3233Q-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:
- 4.5mT Trip, 2.8mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 6.9mA
- Current - Output (Max):
- -
- Output Type:
- Current Source
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3233Q-P-B FAQ
1.How can I place an order for AH3233Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3233Q-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 AH3233Q-P-B reliable?
The price and inventory of AH3233Q-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 AH3233Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3233Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3233Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3233Q-P-B?
AH3233Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3233Q-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 AH3233Q-P-B?
For technical support, including AH3233Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3233Q-P-B requirements.
6.How does Aetrix verify that AH3233Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3233Q-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 AH3233Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3233Q-P-B?
All AH3233Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3233Q-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 AH3233Q-P-B part is unused and in its original packaging.
Return procedure for AH3233Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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