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Diodes Incorporated AH3244Q-P-B
- Part No.:
- AH3244Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3244Q-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:915
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Product details
Overview
AH3244Q-P-B from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC with integrated self-diagnostics, designed for position and proximity sensing in seatbelt buckle detection, gear position monitoring, and door/trunk closure systems. It operates from 2.7V to 27V, features inverted output polarity, -1100 ppm/°C temperature coefficient, and delivers 6 mA off-state supply current at -40°C to +150°C ambient.
For engineers reviewing the AH3244Q-P-B datasheet, AH3244Q-P-B pinout, AH3244Q-P-B application, or AH3244Q-P-B equivalent, this page provides verified magnetic switching thresholds (BOP = 27–63 G, BRP = 10–46 G), thermal protection behavior (TTP = 190°C), chopper-stabilized architecture, and SIP-3 package terminal mapping - all critical for automotive sensor integration and functional safety validation.
Technical Context
The AH3244Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling stable magnetic threshold performance across -40°C to +150°C. Its unipolar switching logic responds exclusively to south-pole magnetic fields exceeding BOP (27–63 G), holding output until flux falls below BRP (10–46 G).
It integrates reverse-voltage protection (−32 V), UVLO (2.2–2.7 V), overtemperature shutdown (190°C trip / 180°C release), and high ESD immunity (HBM = 8 kV, CDM = 1 kV), meeting ISO 26262 readiness requirements for ASIL-B–capable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports direct battery connection across automotive cold-crank (6.5 V) and load-dump (27 V) conditions. |
| BOP / BRP (25°C) | 27–63 G / 10–46 G - defines magnetic on/off hysteresis window for reliable unipolar switching in noisy environments. |
| IOFF (Off-State Current) | 5–6.9 mA - low quiescent draw enables continuous monitoring without excessive power loss in always-on modules. |
| Temperature Coefficient | −1100 ppm/°C - ensures predictable BOP/BRP drift over temperature, critical for fail-safe position sensing. |
| Chopping Frequency | 1000 kHz - suppresses 1/f noise and offsets, delivering ±3.3 μs jitter in 1 kHz switching tests. |
| Thermal Shutdown Threshold | 190°C junction - protects against latch-up during solder reflow or under-hood thermal overload, auto-restarts at 180°C. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - exceeds AEC-Q100 stress requirements for assembly and field robustness. |
Pinout & Package
Package: SIP-3 (Bulk Pack), 3-pin single-inline package with straight leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height - optimized for through-hole mounting in automotive control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VDD | Supply voltage input | Accepts 2.7–27 V DC; includes internal zener clamp and reverse-blocking diode for ±32 V transient tolerance. |
| 2. NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating without affecting operation. |
| 3. GND | Ground reference | Return path for supply current and magnetic sensor bias; requires low-impedance PCB routing for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Inverted output polarity | Output current turns ON when south pole exceeds BOP, then holds until flux drops below BRP - simplifies interface with pull-up resistor and microcontroller interrupt inputs. |
| Integrated self-diagnostics | Safe-mode supply current of 0.5–1.5 mA indicates fault condition (e.g., open load, short circuit, thermal shutdown) without external circuitry. |
| Wide operating temperature | Functional from −40°C to +150°C ambient - validated for engine bay, transmission, and cabin-mounted applications per AEC-Q100 Grade 0. |
| UVLO and overtemperature protection | Undervoltage lockout activates below 2.2 V; thermal shutdown disables output above 190°C - prevents erratic behavior during power brownouts or overheating. |
| Two-wire configuration | Single-loop current-sourcing output eliminates need for separate signal return line - reduces wiring harness weight and connector pins in automotive OEM designs. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion status in driver/passenger seats using a magnet embedded in the tongue and sensor mounted in the receptacle. IC Role / Device Role / Timing Role: Two-wire Hall switch provides current-source output indicating latched/unlatched state; no external power rail required beyond vehicle battery. Use Value: Eliminates mechanical switches prone to wear; −1100 ppm/°C BOP stability ensures consistent detection across cabin temperature extremes (−40°C to +85°C). |
Use Scenario: Monitor P/R/N/D gear selector position in automatic transmissions via rotating cam with embedded magnets. IC Role / Device Role / Timing Role: Unipolar latch-free switching detects discrete gear positions with fast 7 μs response delay and 30–50 kHz max switching frequency. Use Value: Enables real-time gear feedback without contact wear; 27–63 G BOP range accommodates air-gap variations up to ±0.5 mm in production assemblies. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm full closure of doors or trunk lid using magnet on moving panel and sensor on fixed frame. IC Role / Device Role / Timing Role: Inverted-output Hall switch sinks current only when magnet is present - directly interfaces with body control module's wake-up input. Use Value: Reduces standby current vs. three-wire alternatives; IOFF ≤ 6.9 mA meets OEM sleep-mode leakage budgets (<10 mA per sensor). |
Use Scenario: Track wiper blade park position and intermittent cycle timing using cam-actuated magnet near motor housing. IC Role / Device Role / Timing Role: High ESD rating (8 kV HBM) withstands static discharge from wiper motor commutation; chopper stabilization rejects EMI from brushed DC motor noise. Use Value: Ensures accurate park detection after wash/wipe cycles; 100 nF decoupling capacitor requirement minimizes layout sensitivity in space-constrained motor assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3244Q-P-B | Same pinout and magnetic thresholds, but lacks AEC-Q100 qualification and self-diagnostics; IOFF = 8 mA typical. | Not suitable for safety-critical automotive functions requiring PPAP or ISO 26262 alignment. | Select only for non-automotive industrial proximity sensing where qualification overhead is unnecessary. |
| TLE4913-2SA | Three-wire interface, higher BOP (40–80 G), no built-in thermal shutdown; requires external UVLO and reverse-protection. | Requires additional passive components and PCB area; not drop-in compatible due to pin count and supply topology differences. | Choose when higher magnetic sensitivity is needed and system-level diagnostics already exist. |
Compared with AL3244Q-P-B and TLE4913-2SA, AH3244Q-P-B uniquely combines AEC-Q100 qualification, two-wire simplicity, integrated diagnostics, and −1100 ppm/°C thermal stability - making it the only option that satisfies both functional safety readiness and OEM harness weight reduction goals.
Availability
AH3244Q-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 AH3244Q-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.
AH3244Q-P-B belongs to the AH32xxQ automotive Hall switch product line, engineered specifically for robust, qualification-ready position sensing in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the function of the NC pin on AH3244Q-P-B?
The NC (No Connection) pin is internally unconnected and serves no electrical function. It may be tied to VDD, GND, or left floating without affecting device operation or reliability. This design allows compatibility with legacy SIP-3 footprints while minimizing internal routing complexity.
Does AH3244Q-P-B support reverse battery connection?
Yes - AH3244Q-P-B includes an integrated reverse-blocking diode and clamps supply transients to ±32 V. It withstands −32 V reverse supply voltage and draws only −1.5 mA reverse current at −18 V, enabling direct connection to vehicle battery without external protection diodes.
How does the self-diagnostic feature manifest electrically?
Under fault conditions (e.g., open load, short to VDD/GND, or thermal shutdown), AH3244Q-P-B enters safe mode and draws 0.5–1.5 mA supply current - distinct from normal IOFF (5–6.9 mA) and ION (12–17 mA) states - allowing host controllers to detect failure via current monitoring.
Can AH3244Q-P-B operate reliably at 27 V supply during load dump events?
Yes - AH3244Q-P-B is rated for 32 V absolute maximum supply voltage and incorporates internal zener clamping. During sustained 27 V load dump, its thermal derating curve confirms safe operation up to +125°C ambient when mounted on a 143 °C/W SIP-3 PCB layout, per DS41822 Rev. 6 thermal data.
AH3244Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- 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):
- 6mA
- Current - Output (Max):
- -
- Output Type:
- Switch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3244Q-P-B FAQ
1.How can I place an order for AH3244Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3244Q-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 AH3244Q-P-B reliable?
The price and inventory of AH3244Q-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 AH3244Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3244Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3244Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3244Q-P-B?
AH3244Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3244Q-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 AH3244Q-P-B?
For technical support, including AH3244Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3244Q-P-B requirements.
6.How does Aetrix verify that AH3244Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3244Q-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 AH3244Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3244Q-P-B?
All AH3244Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3244Q-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 AH3244Q-P-B part is unused and in its original packaging.
Return procedure for AH3244Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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