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Diodes Incorporated AH3242Q-W-7
- Part No.:
- AH3242Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3242Q-W-7.pdf
- Description:
- MAG SWITCH UNIPOLAR SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:5,870
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Product details
Overview
AH3242Q-W-7 from Diodes Incorporated is a two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, AEC-Q100 qualified for position sensing in harsh environments; features direct-output polarity, ±1100 ppm/°C temperature coefficient, 40–80 G operating point (BOP), and 2.7–27 V supply range; used in seatbelt buckle detection and gear position sensing.
For engineers reviewing the AH3242Q-W-7 datasheet, AH3242Q-W-7 pinout, AH3242Q-W-7 application, or AH3242Q-W-7 equivalent, this page delivers verified magnetic thresholds, thermal protection behavior, supply current states (IOFF = 6 mA typ, ION = 14.5 mA typ), and SC59 (Type A1) package implementation details.
Technical Context
The AH3242Q-W-7 implements a chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift across temperature. Its internal bandgap regulator provides temperature-compensated biasing for analog circuitry, enabling stable operation from −40°C to +150°C ambient.
It operates as a two-wire unipolar switch: output turns on (high-side current sink) when south-pole flux exceeds BOP (40–80 G), remains latched until flux falls below BRP (20–60 G); includes UVLO (2.2–2.7 V), overtemperature shutdown (190°C trip), and auto-restart functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 27 V - supports wide automotive battery range including cold-crank and load-dump conditions. |
| Operating Point (BOP) | 40–80 G at +25°C - defines minimum south-pole field strength required to activate output. |
| Release Point (BRP) | 20–60 G at +25°C - defines maximum residual field before output deactivates. |
| Supply Current (Off) | 6 mA typical - low quiescent draw during inactive state for battery-sensitive systems. |
| Supply Current (On) | 14.5 mA typical - consistent high-side current sink enables direct interface with ECU pull-up networks. |
| Temperature Coefficient | −1100 ppm/°C - quantifies BOP/BRP drift per degree, critical for precision position sensing across vehicle thermal zones. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - meets stringent automotive ESD immunity requirements without external protection. |
Pinout & Package
Package: SC59 (Type A1), surface-mount, 3-pin single-ended leadframe with exposed pad (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 reverse-blocking diode and zener clamp for transient protection. |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating-no functional impact. |
| 3 - GND | Ground reference | Return path for supply current and internal diagnostics; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated self-diagnostics | Monitors internal supply, temperature, and magnetic sampling integrity; asserts safe-mode current (0.5–1.5 mA) on fault. |
| Chopper-stabilized architecture | Reduces offset drift to <±3.3 μs jitter under 1 kHz switching, enabling reliable timing in wiper or window-lift control. |
| Two-wire interface | Eliminates separate ground return wire-simplifies harness routing and reduces connector cost in door/trunk closure modules. |
| Automotive qualification | AEC-Q100 Grade 0 (−40°C to +150°C), PPAP-capable, manufactured in IATF 16949 facilities with full traceability. |
Applications
| Seatbelt Buckle Detection | Transmission Gear Position Sensing |
|---|---|
Use Scenario: Detect 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 directly to body control module (BCM) via two-wire loop. Use Value: Direct-output polarity and −1100 ppm/°C coefficient ensure repeatable activation across cabin temperature extremes (−40°C to +85°C). | Use Scenario: Monitor mechanical gear selector position in automatic transmissions without physical contact. IC Role / Device Role / Timing Role: High-voltage tolerant Hall sensor interfacing with transmission ECU through 100 Ω series resistor and 0.1 µF decoupling. Use Value: 27 V max supply rating withstands load-dump transients; 30–50 kHz max switching frequency supports rapid gear-change event capture. |
| Wiper Arm Position Feedback | Door/Trunk Closure Monitoring |
Use Scenario: Determine parked vs. mid-travel position of windshield wiper motor using embedded magnet on linkage. IC Role / Device Role / Timing Role: Two-wire unipolar switch reporting position state to wiper control unit with <7 μs response delay. Use Value: 7 μs response time ensures accurate synchronization with motor commutation; UVLO prevents false triggering during ignition cycling. | Use Scenario: Confirm full closure of vehicle doors or trunk lid using magnet-in-latch and Hall sensor mounted on pillar. IC Role / Device Role / Timing Role: Automotive-grade proximity detector delivering fail-safe status to access control system via current-loop interface. Use Value: Overtemperature shutdown (190°C trip) protects against latch friction heating; 8 kV HBM ESD rating survives assembly handling and service environment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3242Q-W-7 | Same pinout and electrical specs; differs only in marking code and internal test binning-functionally identical. | No change in system integration or layout; same AEC-Q100 qualification level and diagnostic coverage. | Select if AL3242Q is preferred in your supply chain due to distributor stock or legacy design reuse. |
| TLE4913-2SA | Three-wire interface (separate VDD/GND/OUT); higher BOP (60–100 G); no integrated self-diagnostics or safe-mode current. | Requires additional wiring and external fault monitoring logic; not ISO 26262-ready out-of-box. | Choose only if existing system uses three-wire topology and diagnostic coverage is implemented externally. |
Compared with AH3242Q-W-7, AL3242Q-W-7 offers drop-in compatibility and identical performance, while TLE4913-2SA trades two-wire simplicity and built-in diagnostics for higher magnetic sensitivity and legacy interface support-requiring redesign of power and fault-handling circuits.
Availability
AH3242Q-W-7 is available at Aetrix Electronics and suitable for automotive seatbelt sensing, transmission gear position feedback, and wiper arm position detection requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3242Q-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 ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certified operations.
The AH324xQ series belongs to Diodes' automotive Hall-effect sensor product line, designed specifically for robust, two-wire position and proximity sensing in safety-critical vehicle subsystems with integrated diagnostics and AEC-Q100 compliance.
FAQ
What is the function of Pin 2 (NC) on the AH3242Q-W-7?
Pin 2 is internally unconnected and serves no electrical function. It may be tied to VDD, GND, or left floating without affecting operation. This design allows flexibility in PCB layout and avoids unintended parasitic coupling in high-noise automotive environments.
Does the AH3242Q-W-7 support both high-side and low-side sensing configurations?
Yes-the AH3242Q-W-7 operates as a two-wire current-sink device compatible with both high-side sensing (load between V+ and VDD) and low-side sensing (load between VDD and GND), as shown in the typical application circuits. A 100 Ω series resistor and 0.1 µF decoupling capacitor are required in either configuration.
How does the self-diagnostic feature manifest electrically during fault conditions?
Under fault (e.g., overtemperature, UVLO, or magnetic sampling failure), the device enters safe mode and draws 0.5–1.5 mA (ISAFE) instead of normal IOFF or ION. This distinct current level is detectable by the ECU as a diagnostic flag without requiring additional communication lines or protocols.
Is the AH3242Q-W-7 compliant with ISO 26262 functional safety requirements?
The AH3242Q-W-7 is "ready for ISO 26262" per Diodes' documentation, meaning its architecture-including self-diagnostics, safe-mode current, and AEC-Q100 qualification-supports ASIL-B integration. However, final ASIL assignment requires system-level analysis, including FMEDA, FTA, and hardware/software partitioning per ISO 26262-5 and -6.
AH3242Q-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:
- 6mT Trip, 4mT 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
AH3242Q-W-7 FAQ
1.How can I place an order for AH3242Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3242Q-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 AH3242Q-W-7 reliable?
The price and inventory of AH3242Q-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 AH3242Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3242Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3242Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3242Q-W-7?
AH3242Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3242Q-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 AH3242Q-W-7?
For technical support, including AH3242Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3242Q-W-7 requirements.
6.How does Aetrix verify that AH3242Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3242Q-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 AH3242Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3242Q-W-7?
All AH3242Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3242Q-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 AH3242Q-W-7 part is unused and in its original packaging.
Return procedure for AH3242Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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