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Diodes Incorporated AH3966Q-WT-7
- Part No.:
- AH3966Q-WT-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
AH3966Q-WT-7.pdf
- Description:
- HALL LATCH SWITCH TSOT25 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
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Product details
Overview
AH3966Q-WT-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified dual Hall-effect latch IC for automotive speed and direction sensing, featuring chopper-stabilized architecture, 2.7V–27V supply operation, ±25G magnetic operating points (BOP/BRP), and open-drain SP/DIR outputs in TSOT25 (Type A1) package. It enables robust rotor position tracking in power window anti-pinch systems.
For engineers reviewing the AH3966Q-WT-7 datasheet, AH3966Q-WT-7 pinout, AH3966Q-WT-7 application, or AH3966Q-WT-7 equivalent, this page delivers verified magnetic thresholds, UVLO behavior, output timing (tR/tF < 1µs), thermal stability (–40°C to +150°C), and automotive-grade protection features including reverse polarity and ESD (5kV HBM).
Technical Context
The AH3966Q implements dual Hall plates (H1/H2) with independent offset cancellation and chopper stabilization at 500kHz, enabling precise differential magnetic field detection. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring stable switching thresholds across –40°C to +150°C.
Output control logic decodes quadrature-phase magnetic transitions into speed (SP) and direction (DIR) signals with 50ns count-signal delay (tDC) and ±5µs jitter. Undervoltage lockout (2.35V typ.) freezes output state during brownout, preventing erroneous edge generation in safety-critical motion control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 27V - supports direct battery connection in 12V/24V automotive systems without external regulation |
| Operating Temperature | –40°C to +150°C - qualified for under-hood and motor-control environments per AEC-Q100 Grade 0 |
| Magnetic BOP / BRP | +8G to +42G / –42G to –8G - enables reliable detection of small-gap rotary targets with 32G hysteresis |
| Output Type | Open-drain SP & DIR - allows flexible pull-up voltage selection up to 27V and wired-OR interfacing |
| UVLO Threshold | 2.35V (typ.) - prevents metastable output during cold-crank battery dips below 6V |
| ESD Rating | HBM = 5kV, CDM = 2kV - exceeds automotive system-level ESD immunity requirements (ISO 10605) |
| Response Delay | 13µs (typ.) - supports real-time motor commutation at >60kHz mechanical rotation |
Pinout & Package
TSOT25 (Type A1) - 5-pin ultra-thin surface-mount package (2.9mm × 2.8mm × 0.6mm), matte tin-plated leads, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Supply input with integrated Zener clamp (36V) and reverse-blocking diode - tolerates load-dump transients and reversed battery connection |
| 2 | GND | Power ground - dual GND pins (2 & 3) reduce ground bounce in high-speed switching |
| 3 | GND | Power ground - low-inductance return path for Hall plate bias and output drivers |
| 4 | SP | Speed output - open-drain, 25mA current-limited, 0.2V saturation at 10mA - drives standard 1kΩ pull-up to MCU GPIO |
| 5 | DIR | Direction output - open-drain, phase-aligned with SP to indicate clockwise/counter-clockwise rotation per magnet polarity sequence |
Key Features
| Feature | Design Value |
|---|---|
| Dual Hall latch with speed/direction decoding | Eliminates need for external XOR logic or microcontroller-based quadrature interpretation in motor feedback paths |
| Chopper-stabilized architecture | Reduces switch-point drift to ±350 ppm/°C - maintains <±2G magnetic threshold error over full temperature range |
| Battery reverse polarity protection | Withstands –18V supply reversal indefinitely - no external diode required in battery-fed modules |
| Integrated UVLO with output freeze | Prevents spurious DIR/SP edges during ignition cycling - ensures deterministic state on power-up recovery |
| AEC-Q100 Grade 0 qualification | Validated for 150°C ambient operation - suitable for EPS, transmission, and HVAC blower motor control units |
Applications
| Power Window Anti-Pinch | Electric Power Steering (EPS) Motor Commutation |
|---|---|
Use Scenario: Detecting glass obstruction during window closure by monitoring motor current-induced magnetic field changes via gear rotation. IC Role / Device Role / Timing Role: Dual Hall latch provides synchronized SP/DIR pulses to MCU for real-time angular velocity and direction - enabling sub-10ms pinch reaction. Use Value: 13µs response delay and ±5µs jitter ensure accurate position interpolation at 500rpm, meeting ISO 11452-2 EMC robustness for Class 3 systems. | Use Scenario: Sensing rotor position in brushless DC steering assist motors to time inverter gate drive signals. IC Role / Device Role / Timing Role: Direction output determines commutation sequence (CW/CCW), while speed output feeds closed-loop torque control loop at 20kHz update rate. Use Value: 60kHz max switching frequency and 50ns count-signal delay support 30,000 RPM motor operation with <1 electrical degree phase error. |
| Transmission Gear Position Sensing | HVAC Blower Motor Speed Control |
Use Scenario: Monitoring gear selector shaft rotation to validate P/R/N/D positions in automatic transmissions. IC Role / Device Role / Timing Role: SP/DIR outputs interface directly to transmission control unit (TCU) GPIOs - eliminating need for dedicated encoder ICs. Use Value: ±25G magnetic thresholds accommodate large air gaps (up to 3mm) between sensor and ferrous target, reducing mechanical alignment tolerance. | Use Scenario: Closed-loop speed regulation of centrifugal blower fans in climate control systems using hall-targeted impeller rotation. IC Role / Device Role / Timing Role: Speed output feeds PID controller; direction output confirms fan rotation direction during startup verification. Use Value: 2.7V–27V supply range allows direct connection to vehicle battery - no LDO needed, reducing BOM cost and thermal load in confined dash modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Hall latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US5781KSE-AAA-000-SP | Single-output latch (speed only); no direction channel; 3.3V–24V supply; 100kA/m sensitivity | Requires external logic or MCU firmware to derive direction - increases design complexity and latency | Select when direction sensing is unnecessary and board space is constrained (SOT23-3 package) |
| Allegro A1262LLHLT-T | Dual-output latch but non-AEC-Q100; 4.5V–24V supply; ±30G BOP; no UVLO freeze function | Lacks automotive qualification and undervoltage output freeze - unsuitable for ASIL-B systems | Acceptable for non-safety-critical cabin sensors where cost is primary driver |
Compared with US5781KSE-AAA-000-SP and A1262LLHLT-T, AH3966Q-WT-7 uniquely integrates speed+direction decoding, AEC-Q100 Grade 0 qualification, and UVLO output freeze in a single TSOT25 package - reducing system-level validation effort and improving functional safety compliance for motion-critical automotive subsystems.
Availability
AH3966Q-WT-7 is available at Aetrix Electronics and suitable for automotive power closures, electric power steering motor control, transmission position monitoring, and HVAC blower speed regulation requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3966Q-WT-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, computing, and consumer markets.
The AH3966Q belongs to Diodes' AEC-Q100 qualified Hall-effect sensor product line, engineered specifically for high-reliability rotational sensing in safety-critical automotive subsystems such as anti-pinch windows and EPS.
FAQ
What is the magnetic sensitivity configuration of AH3966Q-WT-7?
AH3966Q-WT-7 has asymmetric magnetic thresholds: BOP = +8G to +42G and BRP = –42G to –8G, with 32G to 68G hysteresis. This enables robust detection of alternating south/north pole sequences on rotating targets, supporting both clockwise and counter-clockwise direction resolution without external calibration.
Does AH3966Q-WT-7 require external pull-up resistors on SP and DIR outputs?
Yes - SP and DIR are open-drain outputs and require external pull-up resistors. Typical value is 1kΩ to VDD (≤27V). The device specifies 25mA output current limit and 0.2V saturation voltage at 10mA, ensuring compatibility with standard 3.3V or 5V MCU inputs when pulled to appropriate logic voltage.
How does the undervoltage lockout (UVLO) behave during power cycling?
When VDD falls below 2.35V (typ.), UVLO triggers and freezes the SP/DIR output states until VDD rises above 2.7V. During this period, outputs remain latched in their last valid state - preventing false edges that could corrupt motor commutation or position counting in safety-critical applications.
Can AH3966Q-WT-7 operate with a 3.3V microcontroller I/O interface?
Yes - although VDD can be up to 27V, the SP and DIR outputs are compatible with 3.3V logic when pulled up to 3.3V. The device's 0.2V output saturation ensures clean low-level signaling to 3.3V GPIOs, and its 5kV HBM ESD rating protects against handling damage during integration into low-voltage control boards.
AH3966Q-WT-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Latch, Dual
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 4.2mT Trip, -4.2mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 7mA
- Current - Output (Max):
- 44mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25 (Type A1)
AH3966Q-WT-7 FAQ
1.How can I place an order for AH3966Q-WT-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3966Q-WT-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 AH3966Q-WT-7 reliable?
The price and inventory of AH3966Q-WT-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3966Q-WT-7 is usually 5 days.
3.What payment methods are accepted for AH3966Q-WT-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3966Q-WT-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3966Q-WT-7?
AH3966Q-WT-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3966Q-WT-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 AH3966Q-WT-7?
For technical support, including AH3966Q-WT-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3966Q-WT-7 requirements.
6.How does Aetrix verify that AH3966Q-WT-7 is sourced from the original manufacturer or authorized distributors?
All AH3966Q-WT-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 AH3966Q-WT-7 meets industry standards.
7.What is the process for return or replacement of AH3966Q-WT-7?
All AH3966Q-WT-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3966Q-WT-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 AH3966Q-WT-7 part is unused and in its original packaging.
Return procedure for AH3966Q-WT-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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