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Diodes Incorporated AH3243Q-W-7
- Part No.:
- AH3243Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3243Q-W-7.pdf
- Description:
- MAG SWITCH UNIPOLAR SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:1,089
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Product details
Overview
AH3243Q-W-7 from Diodes Incorporated is a two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, AEC-Q100 qualified for -40°C to +150°C operation, 2.7V–27V supply range, and direct-output polarity; used in seatbelt buckle detection, gear position sensing, and door/trunk closure systems where robust magnetic switching and fault monitoring are required.
For engineers reviewing the AH3243Q-W-7 datasheet, AH3243Q-W-7 pinout, AH3243Q-W-7 application, or AH3243Q-W-7 equivalent, this page delivers verified magnetic thresholds (BOP = 27–63 G, BRP = 10–46 G), chopper-stabilized temperature coefficient (-1100 ppm/°C), thermal shutdown (190°C), UVLO (2.2–2.7 V), and 8 kV HBM ESD rating - all critical for automotive position-sensing reliability validation.
Technical Context
The AH3243Q-W-7 implements a chopper-stabilized Hall sensor architecture with dynamic offset cancellation and an internal bandgap regulator, enabling stable magnetic switching across -40°C to +150°C ambient. Its unipolar response activates on south-pole field exceeding BOP (27–63 G typ) and releases only when flux falls below BRP (10–46 G typ).
Self-diagnostics include safe-mode current reporting (ISAFE = 0.5–1.5 mA), overtemperature shutdown (TTP = 190°C) with auto-restart (TTPR = 180°C), UVLO protection (2.2–2.7 V), and reverse-voltage blocking with zener clamp. It operates in two-wire high-side or low-side configurations with 100 Ω typical load and 0.1 µF decoupling.
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 and load-dump transients |
| Operating Temperature | -40°C to +150°C - qualified for under-hood and cabin-mounted automotive sensing |
| BOP / BRP (25°C) | 27–63 G / 10–46 G - precise unipolar switching with tight magnetic hysteresis for reliable position detection |
| Temperature Coefficient | -1100 ppm/°C - enables predictable BOP/BRP drift compensation over temperature without external calibration |
| Supply Current (ON/OFF) | ION = 12–17 mA / IOFF = 5–6.9 mA - defines power budget for continuous two-wire loop operation |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - ensures robustness against assembly and in-vehicle electrostatic events |
| UVLO Threshold | 2.2–2.7 V - prevents erratic switching during brown-out or battery recovery conditions |
Pinout & Package
Package: SC59 (Type A1), surface-mount, 3-pin single-ended package with 268°C/W thermal resistance 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 internal reverse-blocking diode and zener clamp for transient protection |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating per layout requirements |
| 3 - GND | Ground reference | Return path for supply current and Hall sensor bias; requires low-impedance PCB connection |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates offset drift and enables ±3.3 µs output jitter over full temperature range |
| Integrated self-diagnostics | Safe-mode current (0.5–1.5 mA) signals internal fault without external circuitry |
| Two-wire interface | Reduces wiring complexity and connector cost in automotive body control modules |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation and PPAP-capable manufacturing in IATF 16949 facilities |
| Thermal shutdown with auto-restart | Shuts down at 190°C junction and resumes at 180°C - prevents latch-up during overheating events |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
Use Scenario: Detecting buckle engagement status in driver/passenger seats using magnet-actuated proximity sensing. IC Role / Device Role / Timing Role: Unipolar Hall switch providing ON/OFF current-state signal via two-wire loop to body control unit. Use Value: Direct-output polarity and -1100 ppm/°C BOP drift ensure consistent buckle detection across cabin temperature extremes (-40°C to +85°C). | Use Scenario: Monitoring mechanical gear selector position in automatic transmissions with non-contact sensing. IC Role / Device Role / Timing Role: Magnetic position detector generating pulsed current output synchronized to gear detent movement. Use Value: 30–50 kHz max switching frequency and 7 µs response delay enable accurate real-time gear state capture during shift events. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
Use Scenario: Confirming full closure of vehicle doors or trunk lids using embedded magnets and fixed Hall sensors. IC Role / Device Role / Timing Role: Two-wire unipolar switch reporting closed/open state through supply current modulation. Use Value: 2.7–27 V operation and UVLO protection maintain reliable function during battery voltage sag during accessory mode. | Use Scenario: Tracking wiper blade park position and intermittent cycle timing in rain-sensing wiper systems. IC Role / Device Role / Timing Role: Hall-effect position indicator triggering wiper motor stop/start logic based on magnet alignment. Use Value: Chopper stabilization and <±3.3 µs jitter ensure precise park-point detection even under engine vibration and EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3242Q-W-7 | Higher BOP (40–80 G typ) and BRP (20–60 G typ); same -1100 ppm/°C TC and package | Better suited for medium-sensitivity applications requiring larger air gaps or weaker magnets | Select when magnetic field strength exceeds 40 G at target sensing distance |
| AH3244Q-W-7 | Identical BOP/BRP specs but inverted output polarity; same supply range, temp grade, and diagnostics | Required where controller expects active-low current-state signaling in two-wire loop | Choose only when system-level logic demands inverted output behavior |
Compared with AH3242Q-W-7 and AH3244Q-W-7, the AH3243Q-W-7 provides the lowest magnetic operate point (27–63 G) among direct-output variants, enabling use with smaller or lower-strength magnets while maintaining identical thermal, electrical, and diagnostic performance.
Availability
AH3243Q-W-7 is available at Aetrix Electronics and suitable for automotive seatbelt detection, gear position sensing, and door/trunk closure monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3243Q-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The AH324xQ series belongs to Diodes' automotive Hall-effect switch product line, designed specifically for AEC-Q100-compliant position and proximity sensing in safety-critical vehicle subsystems.
FAQ
What is the magnetic polarity sensitivity of AH3243Q-W-7?
The AH3243Q-W-7 is a south-pole-activated unipolar switch: output turns ON when south-pole magnetic flux density exceeds BOP (27–63 G typ at 25°C) and remains ON until flux drops below BRP (10–46 G typ). North-pole fields produce no switching action.
Can AH3243Q-W-7 be used in high-vibration environments like engine compartments?
Yes - its chopper-stabilized architecture delivers ±3.3 µs output jitter over -40°C to +150°C, and the integrated bandgap regulator ensures stable internal bias under mechanical stress. Combined with 8 kV HBM ESD rating and thermal auto-restart, it meets requirements for under-hood position sensing.
What is the role of the NC pin (Pin 2) in AH3243Q-W-7?
Pin 2 is a no-connect terminal with no internal connection. It may be left floating, tied to VDD, or connected to GND depending on PCB layout constraints - none affects device operation, but grounding it can reduce noise coupling in high-EMI zones.
Does AH3243Q-W-7 support ISO 26262 functional safety compliance?
The AH3243Q-W-7 is "ready for ISO 26262" per Diodes' documentation, meaning its integrated self-diagnostics (safe-mode current, thermal shutdown, UVLO) provide foundational elements for ASIL-B decomposition. Full compliance requires system-level implementation and validation by the end customer.
AH3243Q-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:
- 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):
- -
- Current - Output (Max):
- -
- Output Type:
- Switch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3243Q-W-7 FAQ
1.How can I place an order for AH3243Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3243Q-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 AH3243Q-W-7 reliable?
The price and inventory of AH3243Q-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 AH3243Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3243Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3243Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3243Q-W-7?
AH3243Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3243Q-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 AH3243Q-W-7?
For technical support, including AH3243Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3243Q-W-7 requirements.
6.How does Aetrix verify that AH3243Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3243Q-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 AH3243Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3243Q-W-7?
All AH3243Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3243Q-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 AH3243Q-W-7 part is unused and in its original packaging.
Return procedure for AH3243Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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