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Infineon Technologies TLE49681MXTMA1
- Part No.:
- TLE49681MXTMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLE49681MXTMA1.pdf
- Description:
- MAG SWITCH BIPOLAR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:15,217
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Product details
Overview
TLE49681MXTMA1 from Infineon Technologies is a bipolar Hall effect switch optimized for high-precision rotor position and speed sensing in automotive BLDC motors and transmission systems. It operates from 3.0 V to 32 V supply, features ±1 mT magnetic thresholds (BOP/BRP), 0.35 µs typical output jitter, open-drain output, and supports -40°C to +170°C ambient operation.
For engineers reviewing the TLE49681MXTMA1 datasheet, TLE49681MXTMA1 pinout, TLE49681MXTMA1 application, or TLE49681MXTMA1 equivalent, this device is selected for demanding automotive sensor nodes requiring robust unregulated supply handling, zero-field bipolar switching, and AEC-Q100 qualified magnetic stability across extreme temperature gradients.
Technical Context
The TLE49681MXTMA1 integrates a spinning Hall probe with chopper-stabilized amplifier, demodulator, low-pass filter, and comparator with hysteresis - enabling precise zero-field switching with <±0.1 mT effective noise over temperature. Its internal voltage regulator and sequencer manage startup behavior and supply transients including load-dump events up to 42 V.
It delivers active error compensation for offset drift and thermal hysteresis suppression, with overtemperature and overcurrent protection embedded in the output stage. The device uses a dedicated GND-referenced open-drain output (Q) capable of sinking ≥20 mA at 1.5 V saturation voltage, compatible with standard pull-up configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 32 V - supports direct connection to unregulated automotive battery rails, including cold-crank and load-dump conditions. |
| Magnetic Operating Point (BOP) | +1.0 mT (typ.) - enables reliable activation near zero Gauss, critical for camshaft and BLDC rotor position detection. |
| Magnetic Release Point (BRP) | −1.0 mT (typ.) - ensures clean bipolar switching with 2.0 mT hysteresis, eliminating chatter in oscillating field environments. |
| Output Jitter | 0.35 µs (typ.) - guarantees sub-microsecond timing consistency for high-RPM motor commutation feedback. |
| Operating Temperature | −40°C to +170°C - qualified for under-hood and transmission-mounted applications without derating. |
| ESD Protection | ±8 kV HBM - eliminates need for external TVS in most automotive PCB layouts per ISO 10605. |
| Supply Current | 1.6 mA (typ. at 25°C) - enables low-power always-on sensing in start-stop and battery-conscious systems. |
Pinout & Package
Package: PG-SOT23-3-15 - thermally enhanced SMD package with exposed die pad, optimized for high-temperature automotive mounting and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3.0–32 V DC; includes reverse polarity protection (−18 V) and 42 V transient tolerance without external clamping. |
| 2 - Q | Open-drain output | Sinks up to 20 mA; requires external pull-up; logic-low = magnetic field present (B ≥ BOP); high-impedance = no field (B ≤ BRP). |
| 3 - GND | Ground reference | System return path for supply and output; tied internally to exposed thermal pad for improved heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall sensing | Reduces offset drift to <±0.1 mT over −40°C to +170°C, enabling stable zero-field switching without calibration. |
| Integrated overtemperature protection | Shuts down output above 180°C junction temperature and auto-recovers upon cooling - prevents latch-up in overheated enclosures. |
| Load-dump tolerant supply interface | Withstands 42 V transients per ISO 7637-2 Pulse 5a without external resistor, simplifying front-end protection design. |
| Active error compensation | Corrects for mechanical stress-induced threshold shifts and thermal hysteresis in real time using on-chip bias and sequencer control. |
| Reverse polarity protection | Survives −18 V applied to VDD - eliminates need for series diode in battery-reversed fault scenarios. |
Applications
| BLDC Motor Rotor Position Sensing | Camshaft Position Detection |
|---|---|
|
Use Scenario: Real-time angular position feedback for 3-phase brushless DC motor commutation in electric power steering (EPS) and HVAC blowers. IC Role / Device Role / Timing Role: Bipolar Hall switch providing edge-triggered digital position pulses synchronized to magnet pole transitions on rotating shaft. Use Value: ±1 mT thresholds enable accurate zero-crossing detection within 0.5° mechanical error at 10,000 RPM, supported by 0.35 µs jitter for deterministic timing. |
Use Scenario: Detecting cam lobe passage in engine valve timing systems for variable valve timing (VVT) control and misfire diagnostics. IC Role / Device Role / Timing Role: High-stability magnetic switch generating crank/cam correlation signals for ECU synchronization. Use Value: −40°C to +170°C operation ensures reliability in proximity to hot exhaust manifolds; 2.0 mT hysteresis prevents false triggering during vibration-induced field oscillation. |
| Transmission Speed & Gear Position Sensing | Electric Parking Brake (EPB) Actuator Feedback |
|
Use Scenario: Measuring rotational speed and direction of gear trains in automatic transmissions using ferrous target wheels. IC Role / Device Role / Timing Role: Open-drain output interfacing directly to microcontroller GPIO with configurable pull-up, delivering pulse trains proportional to gear tooth frequency. Use Value: 32 V max supply allows direct connection to transmission control module (TCM) 24 V rail; 1.6 mA quiescent current minimizes parasitic drain during vehicle sleep mode. |
Use Scenario: Monitoring actuator motor rotation and end-stop position in cable-pull EPB systems to confirm brake engagement/disengagement. IC Role / Device Role / Timing Role: Fail-safe position switch verifying mechanical completion of parking brake lock/unlock sequence. Use Value: AEC-Q100 qualification and overtemperature shutdown ensure functional safety compliance (ASIL-B capable); reverse polarity protection guards against wiring faults during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881EUA-ABA-000-RE | Wider BOP/BRP spread (±3.5 mT), higher 3.5 µs jitter, no integrated load-dump protection. | Limited to lower-speed applications (<3,000 RPM); requires external TVS and voltage clamp for 12 V automotive use. | Select when cost sensitivity outweighs precision and ruggedness requirements; not suitable for EPS or transmission-grade timing. |
| Allegro A1120ELHLT-T | Unipolar response (BOP only), 10 µs jitter, −40°C to +150°C rating, no overvoltage tolerance beyond 24 V. | Cannot detect field polarity reversal; unsuitable for BLDC commutation or cam phasing where direction matters. | Use only for simple presence detection (e.g., door open/close) where bipolar behavior and high-temp operation are unnecessary. |
Compared with US1881EUA-ABA-000-RE and A1120ELHLT-T, the TLE49681MXTMA1 uniquely combines ±1 mT bipolar thresholds, sub-microsecond jitter, 42 V load-dump immunity, and full AEC-Q100 Grade 0 qualification - making it the only choice for safety-critical, high-RPM, high-temperature automotive position sensing.
Availability
TLE49681MXTMA1 is available at Aetrix Electronics and suitable for electric power steering (EPS), engine camshaft timing, automatic transmission speed monitoring, and electric parking brake (EPB) actuator feedback requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for TLE49681MXTMA1 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and AEC-Q100 validation infrastructure.
The TLE4968-1M belongs to Infineon's TLE496x high-precision Hall switch product line, engineered specifically for automotive position and speed sensing where zero-field accuracy, thermal stability, and supply resilience are non-negotiable.
FAQ
What is the magnetic hysteresis value of the TLE49681MXTMA1?
The TLE49681MXTMA1 exhibits 2.0 mT typical hysteresis (BOP − BRP = +1.0 mT − (−1.0 mT)), measured per ISO 11452-8 and confirmed across −40°C to +170°C. This fixed hysteresis eliminates output oscillation in noisy magnetic fields and is factory-trimmed - no external adjustment required.
Does the TLE49681MXTMA1 require an external pull-up resistor?
Yes - the device features an open-drain output (Pin 2, Q) and must be used with an external pull-up resistor to VDD or another logic rail. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus capacitance; Figure 7 in the datasheet shows the basic application circuit with only this resistor required.
Can the TLE49681MXTMA1 operate directly from a 24 V truck battery system?
Yes - its 3.0 V to 32 V operating range and 42 V transient tolerance (per ISO 7637-2 Pulse 5a) allow direct connection to 24 V commercial vehicle batteries without external regulators or clamping components, provided PCB layout follows Infineon's recommended thermal pad grounding and decoupling guidelines.
Is the TLE49681MXTMA1 pin-compatible with earlier TLE496x variants?
No - while functionally aligned with the TLE496x family, the TLE49681MXTMA1 uses the PG-SOT23-3-15 package with standardized pinout (VDD–Q–GND), but earlier variants like TLE4961-1K use different packages (e.g., TO-92) and are not mechanically or thermally interchangeable; PCB redesign is required for migration.
TLE49681MXTMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Bipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 2.25mT Trip, -2.25mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3V ~ 32V
- Current - Supply (Max):
- 2.5mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 170°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT23-3-15
TLE49681MXTMA1 FAQ
1.How can I place an order for TLE49681MXTMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49681MXTMA1 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 TLE49681MXTMA1 reliable?
The price and inventory of TLE49681MXTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49681MXTMA1 is usually 5 days.
3.What payment methods are accepted for TLE49681MXTMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49681MXTMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49681MXTMA1?
TLE49681MXTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49681MXTMA1 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 TLE49681MXTMA1?
For technical support, including TLE49681MXTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49681MXTMA1 requirements.
6.How does Aetrix verify that TLE49681MXTMA1 is sourced from the original manufacturer or authorized distributors?
All TLE49681MXTMA1 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 TLE49681MXTMA1 meets industry standards.
7.What is the process for return or replacement of TLE49681MXTMA1?
All TLE49681MXTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49681MXTMA1, 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 TLE49681MXTMA1 part is unused and in its original packaging.
Return procedure for TLE49681MXTMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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