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Diodes Incorporated AH3234Q-W-7
- Part No.:
- AH3234Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3234Q-W-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,950
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Product details
Overview
AH3234Q-W-7 from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC in SC59 (Type A1) package, designed for position and proximity sensing in harsh environments. It features inverted output polarity, operates from 2.7V to 27V, has BOP = 27–63 G (typ), BRP = 10–46 G (typ), and temperature coefficient of –1100 ppm/°C - enabling reliable detection in seatbelt buckle and gear position systems.
For engineers reviewing the AH3234Q-W-7 datasheet, AH3234Q-W-7 pinout, AH3234Q-W-7 application, or AH3234Q-W-7 equivalent, this device delivers robust magnetic switching with thermal shutdown, reverse-voltage protection, UVLO, and ±3.3 µs output jitter - critical for functional-safety-aware automotive subsystems requiring stable two-wire current-loop operation.
Technical Context
The AH3234Q-W-7 implements a chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift across –40°C to +150°C ambient. Its internal bandgap regulator supplies temperature-compensated bias to all subcircuits, ensuring consistent BOP/BRP thresholds despite supply and thermal variation.
This unipolar switch responds only to south-pole magnetic fields: output current turns on when flux exceeds BOP (27–63 G typ), remains latched until flux falls below BRP (10–46 G typ), and exhibits inverted polarity - meaning high current flows when active, low when inactive - supporting direct integration into high-side sensing configurations.
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 (6.5 V) and load-dump (27 V) transients without external regulation. |
| Operating Point (BOP) | 27–63 G (typ @ +25°C) - enables detection of weak magnetic fields from small or distant magnets in space-constrained assemblies. |
| Release Point (BRP) | 10–46 G (typ @ +25°C) - provides hysteresis margin of ≥17 G to prevent chatter near threshold in noisy mechanical environments. |
| Temperature Coefficient | –1100 ppm/°C - ensures predictable BOP/BRP shift over temperature, simplifying magnetic design margining for –40°C to +150°C operation. |
| Supply Current (Off State) | 5–6.9 mA - defines minimum system quiescent power draw in standby; compatible with two-wire loop-powered architectures. |
| Output Jitter | ±3.3 µs - guarantees timing predictability for downstream microcontroller edge-triggered capture in safety-critical position feedback. |
| ESD Rating (HBM) | 8 kV - meets ISO 10605 requirements for in-vehicle handling and assembly without additional protection circuitry. |
Pinout & Package
SC59 (Type A1) surface-mount package: 3-pin single-inline, 2.9 mm × 2.8 mm body, 1.15 mm height, gull-wing leads. Thermal resistance RθJA = 268 °C/W on 50 mm × 50 mm 2 oz PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7–27 V; includes integrated reverse-blocking diode and zener clamp for ±32 V transient tolerance. |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating - no electrical impact on operation. |
| 3 - GND | Ground reference | Return path for supply current and internal regulator; requires low-inductance decoupling (≥100 nF) placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces offset drift to <±0.5 mV over temperature, enabling stable magnetic thresholds without calibration. |
| Integrated thermal shutdown | Shuts down at +190°C junction temperature and auto-restarts at +180°C - prevents latch-up during under-hood thermal excursions. |
| Inverted unipolar output | Delivers high-current state (ION ≈ 14.5 mA) when south pole is present - simplifies interface with pull-down load resistors in high-side sensing. |
| UVLO protection | Locks output off until VDD rises above 2.2 V - avoids erratic switching during power ramp-up or brownout conditions. |
| Two-wire loop compatibility | Operates with single supply line and ground return - eliminates need for separate signal wire, reducing harness cost and connector pins. |
Applications
| Seatbelt Buckle Detection | Transmission Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seats using a magnet embedded in the tongue and sensor mounted in the receptacle. IC Role / Device Role / Timing Role: Unipolar Hall switch providing current-loop ON/OFF signal indicating mechanical latch closure. Use Value: Inverted output enables direct high-side drive of indicator LED or ECU input without level-shifting; wide VDD range accommodates vehicle battery fluctuations during ignition. |
Use Scenario: Monitor gear selector lever position in automatic transmission housings via rotating cam-magnet assembly. IC Role / Device Role / Timing Role: Magnetic position detector converting mechanical rotation into discrete current-state transitions for TCU input. Use Value: –1100 ppm/°C temperature coefficient ensures consistent BOP/BRP across under-hood temperatures (–40°C to +150°C), eliminating recalibration needs. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm door or trunk lid fully closed using magnet on moving panel and sensor on fixed frame. IC Role / Device Role / Timing Role: Proximity switch generating current-state signal for body control module (BCM) wake-up and status reporting. Use Value: 8 kV HBM ESD rating withstands static discharge during service/maintenance; built-in reverse-voltage protection guards against wiring errors during installation. |
Use Scenario: Sense wiper motor park position by detecting magnet on cam shaft during end-of-cycle dwell. IC Role / Device Role / Timing Role: Timing-critical position detector triggering motor stop command within ±3.3 µs jitter window. Use Value: 50 kHz max switching frequency supports fast wiper sweep rates; low 7 µs response delay ensures accurate park detection even at high motor speeds. |
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-W-7 | Direct-output polarity (not inverted); same BOP/BRP range and temperature coefficient. | Requires pull-down load configuration instead of pull-up; unsuitable where existing firmware expects inverted logic. | Select if system design uses low-side sensing or requires active-low signaling convention. |
| AL3234Q-W-7 | Same pinout and electrical specs but with enhanced ESD (15 kV HBM) and extended BRP range (3–53 G). | Better noise immunity in high-EMI zones (e.g., near motors or inverters); wider hysteresis improves reliability in vibration-prone mounts. | Prefer for next-gen designs targeting ASIL-B compliance or operating near high-power actuators. |
Compared with AH3232Q-W-7, AH3234Q-W-7 provides inverted logic essential for high-side sensing without external inversion; versus AL3234Q-W-7, it trades higher ESD robustness for cost-sensitive legacy platforms where 8 kV HBM suffices.
Availability
AH3234Q-W-7 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 AH3234Q-W-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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949 certified manufacturing.
The AH323xQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for AEC-Q100 Grade 0/1 position sensing in safety-critical two-wire systems with minimal external components.
FAQ
What is the function of Pin 2 (NC) on the AH3234Q-W-7?
Pin 2 is a no-connect terminal with no internal bond wire or circuit connection. It may be left floating, tied to VDD, or connected to GND without affecting device operation, thermal performance, or magnetic sensitivity. This flexibility simplifies PCB layout and allows use of common footprint across multiple variants in the AH323xQ family.
Does the AH3234Q-W-7 require an external bypass capacitor?
Yes - a minimum 100 nF ceramic decoupling capacitor must be placed between VDD and GND, as close as possible to the IC pins. This stabilizes the internal bandgap regulator, suppresses supply noise coupling into the Hall element, and ensures reliable switching under fast VDD transients such as load dump or cranking events.
How does the inverted output polarity affect system-level interfacing?
The inverted polarity means the device sinks current (high-state) when a south pole exceeds BOP, and stops sinking (low-state) when flux drops below BRP. This enables direct high-side sensing with a pull-up resistor to battery, eliminating need for external transistor drivers or logic inverters in BCM or ECU input stages.
Is the AH3234Q-W-7 suitable for new automotive designs?
No - Diodes Incorporated explicitly states "THE AH3231Q-AH3234Q/AH3270Q-AH3272Q ARE NOT RECOMMENDED FOR NEW DESIGNS." New projects should evaluate successor devices like AL3234Q-W-7 or contact Diodes for qualified replacements with updated qualification, longevity, and support commitments.
AH3234Q-W-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:
- Latch, Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 7mT Trip, 0.3mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 6.9mA
- Current - Output (Max):
- -
- Output Type:
- Switch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59 (Type A1)
AH3234Q-W-7 FAQ
1.How can I place an order for AH3234Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3234Q-W-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 AH3234Q-W-7 reliable?
The price and inventory of AH3234Q-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3234Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3234Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3234Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3234Q-W-7?
AH3234Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3234Q-W-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 AH3234Q-W-7?
For technical support, including AH3234Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3234Q-W-7 requirements.
6.How does Aetrix verify that AH3234Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3234Q-W-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 AH3234Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3234Q-W-7?
All AH3234Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3234Q-W-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 AH3234Q-W-7 part is unused and in its original packaging.
Return procedure for AH3234Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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