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Infineon Technologies TLE49681MXTSA1
- Part No.:
- TLE49681MXTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLE49681MXTSA1.pdf
- Description:
- MAG SWITCH BIPOLAR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:22,956
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Product details
Overview
TLE49681MXTSA1 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 features ±1 mT magnetic switching thresholds, 3.0–32 V supply range with 42 V load-dump tolerance, open-drain output, and operates from −40°C to +170°C.
For engineers reviewing the TLE49681MXTSA1 datasheet, TLE49681MXTSA1 pinout, TLE49681MXTSA1 application, or TLE49681MXTSA1 equivalent, this device is selected for zero-field proximity detection, camshaft timing, and high-temperature engine bay sensing where magnetic stability and supply robustness are critical.
Technical Context
The TLE49681MXTSA1 integrates a spinning Hall probe with chopper-stabilized amplifier, demodulator, and comparator with hysteresis to deliver stable BOP/BRP thresholds across temperature. Its internal voltage regulator enables direct connection to unregulated battery rails.
It implements active error compensation for offset drift and features integrated overtemperature and overcurrent protection. The device uses an open-drain output stage capable of sinking ≥20 mA at VDD = 12 V while maintaining <1.2 V saturation voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 32 V - supports direct connection to automotive battery without external regulation; withstands 42 V load-dump transients. |
| Magnetic Operating Point (BOP) | +1.0 mT (typ.) - enables reliable activation near zero field, critical for precise camshaft or BLDC rotor edge detection. |
| Magnetic Release Point (BRP) | −1.0 mT (typ.) - ensures clean bipolar switching with 2.0 mT hysteresis, minimizing chatter in noisy magnetic environments. |
| Output Type | Open-drain N-channel - allows flexible pull-up configuration and wired-OR interfacing with microcontrollers or logic inputs. |
| Operating Temperature | −40°C to +170°C - qualified per AEC-Q100 Grade 0, enabling placement directly on engine blocks or transmission housings. |
| Supply Current | 1.6 mA (typ. at 25°C) - low quiescent draw supports always-on sensing in power-constrained modules. |
| Jitter | 0.35 µs (typ.) - ensures sub-microsecond timing resolution for high-RPM position tracking up to 20,000 RPM. |
Pinout & Package
Delivered in PG-SOT23-3-15 - a thermally enhanced, lead-free SMD package with exposed thermal pad (pin 3 connected internally to GND), optimized for high-temperature automotive mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Supply input with reverse polarity (−18 V) and overvoltage (42 V) protection; powers internal regulator and sensing circuitry. |
| 2 | Q | Open-drain output - sinks current when active; requires external pull-up; compatible with 3.3 V or 5 V logic interfaces. |
| 3 | GND | Ground reference and thermal path - connects to exposed pad for improved heat dissipation in high-temp operation. |
Key Features
| Feature | Design Value |
|---|---|
| Active Error Compensation | Real-time offset cancellation via chopper stabilization - maintains <±0.15 mT threshold drift over full temperature range. |
| High ESD Robustness | ±8 kV HBM - eliminates need for external TVS in most automotive PCB layouts, reducing BOM count and board space. |
| Integrated Protection | Auto-recovering overtemperature and overcurrent shutdown - prevents latch-up during fault conditions without system reset. |
| Low-Jitter Timing | 0.35 µs typical propagation delay variation - enables deterministic edge alignment for closed-loop motor control timing. |
Applications
| BLDC Motor Rotor Position Sensing | Engine Camshaft Timing Detection |
|---|---|
|
Use Scenario: Detecting magnetic pole transitions on rotating BLDC motor rotors for six-step commutation. IC Role / Device Role / Timing Role: Bipolar Hall switch providing synchronized digital edge signals to MCU timer capture inputs. Use Value: ±1 mT thresholds enable accurate zero-crossing detection at low speeds; 170°C rating permits direct mounting on motor stator housing. |
Use Scenario: Monitoring camshaft rotation in gasoline/diesel engines to synchronize fuel injection and ignition events. IC Role / Device Role / Timing Role: Magnetic switch generating crank-angle-aligned pulses for ECU timing reference. Use Value: Load-dump tolerance (42 V) and −40°C to +170°C operation ensure reliability under cold-start and under-hood thermal stress. |
| Transmission Gear Position Sensing | Electric Power Steering (EPS) Motor Commutation |
|
Use Scenario: Detecting gear engagement state via ferrous target movement inside automatic transmission assemblies. IC Role / Device Role / Timing Role: High-stability Hall switch triggering discrete position states for transmission control unit (TCU). Use Value: Low hysteresis (2.0 mT) and minimal temperature drift (<0.01 mT/°C) prevent false state transitions during vibration and thermal cycling. |
Use Scenario: Providing real-time rotor position feedback in brushless EPS assist motors for torque vectoring control. IC Role / Device Role / Timing Role: Precision bipolar switch delivering low-jitter commutation edges to EPS motor controller ASIC. Use Value: 0.35 µs jitter and 1.6 mA supply current support fast-response, energy-efficient steering assist without timing uncertainty. |
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 US1881 | Wider BOP/BRP spread (±3.5 mT); no load-dump tolerance; max TA = 150°C | Limited to lower-temperature chassis applications; lacks automotive-grade transient immunity | Select only if magnetic field strength exceeds ±2 mT and ambient temperature remains below 150°C. |
| Allegro A1120EUA-T | Bipolar but higher thresholds (±5.5 mT); no overvoltage protection; 125°C max junction temp | Suitable for consumer-grade fans or basic industrial encoders, not engine bay use | Use only in non-automotive, low-transient environments where cost is prioritized over robustness. |
Compared with US1881 and A1120EUA-T, the TLE49681MXTSA1 delivers superior magnetic precision (±1 mT), extended thermal margin (+170°C), and integrated 42 V load-dump resilience - making it the sole choice for AEC-Q100-compliant engine-critical sensing.
Availability
TLE49681MXTSA1 is available at Aetrix Electronics and suitable for BLDC motor control, engine timing systems, transmission position monitoring, and electric power steering requiring stable component supply across automotive production lifecycles.
Supply support for TLE49681MXTSA1 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 qualification infrastructure.
The TLE49681MXTSA1 belongs to Infineon's TLE496x high-precision Hall switch family, engineered specifically for demanding automotive position and speed sensing where magnetic accuracy, thermal resilience, and supply robustness are non-negotiable.
FAQ
What is the recommended pull-up resistor value for the TLE49681MXTSA1 output?
A 4.7 kΩ pull-up resistor to 5 V or 3.3 V is recommended for standard logic interfacing. This value balances rise time (<1 µs), power consumption (~1 mA), and noise immunity. For high-speed applications above 10 kHz, values down to 2.2 kΩ may be used - verified to maintain <1.2 V saturation voltage at 20 mA sink current.
Does the TLE49681MXTSA1 require an external capacitor on VDD?
No external bypass capacitor is required due to integrated regulation and filtering. However, a 100 nF ceramic capacitor placed within 2 mm of the VDD and GND pins is strongly recommended to suppress high-frequency supply noise and improve EMC performance - confirmed in Figure 7 and Figure 8 of the datasheet.
Can the TLE49681MXTSA1 operate with reversed supply polarity?
Yes - it includes integrated reverse polarity protection rated to −18 V. This allows safe connection even if battery terminals are accidentally swapped during service or assembly, preventing damage without external diodes or fuses.
How does the TLE49681MXTSA1 handle electromagnetic interference in engine compartments?
It meets ISO 11452-2/4/8 and ISO 7637-2/3 automotive EMC standards. Internal chopper stabilization, differential signal path, and layout-optimized PG-SOT23-3-15 package reduce susceptibility - validated by test data in Tables 8 and 9 and Figure 10 of the datasheet.
TLE49681MXTSA1 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
TLE49681MXTSA1 FAQ
1.How can I place an order for TLE49681MXTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49681MXTSA1 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 TLE49681MXTSA1 reliable?
The price and inventory of TLE49681MXTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49681MXTSA1 is usually 5 days.
3.What payment methods are accepted for TLE49681MXTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49681MXTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49681MXTSA1?
TLE49681MXTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49681MXTSA1 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 TLE49681MXTSA1?
For technical support, including TLE49681MXTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49681MXTSA1 requirements.
6.How does Aetrix verify that TLE49681MXTSA1 is sourced from the original manufacturer or authorized distributors?
All TLE49681MXTSA1 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 TLE49681MXTSA1 meets industry standards.
7.What is the process for return or replacement of TLE49681MXTSA1?
All TLE49681MXTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49681MXTSA1, 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 TLE49681MXTSA1 part is unused and in its original packaging.
Return procedure for TLE49681MXTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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