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Infineon Technologies TLE49646MXTSA1
- Part No.:
- TLE49646MXTSA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLE49646MXTSA1.pdf
- Description:
- MAG SWITCH UNIPOLAR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,042
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Product details
Overview
TLE49646MXTSA1 from Infineon Technologies is a high-precision unipolar Hall effect switch optimized for automotive position and speed sensing. It operates from 3.0 V to 32 V supply, delivers ±0.1 mT magnetic threshold stability over −40°C to +170°C, features open-drain output with 100 mA sink capability, and includes integrated reverse polarity (−18 V), overvoltage (42 V), overcurrent, and overtemperature protection. Used in crankshaft and camshaft sensing in engine control units.
For engineers reviewing the TLE49646MXTSA1 datasheet, TLE49646MXTSA1 pinout, TLE49646MXTSA1 application, or TLE49646MXTSA1 equivalent, key selection criteria include magnetic operating point (BOP = 3.5 mT), release point (BRP = 2.5 mT), low jitter (0.35 µs typ.), ESD robustness (±8 kV HBM), and AEC-Q100 qualification for under-hood deployment.
Technical Context
The TLE49646MXTSA1 integrates a spinning Hall probe with chopper-stabilized amplifier, demodulator, and comparator with hysteresis to suppress offset drift and thermal noise. Its bias and compensation circuits actively correct for process and temperature variations, enabling stable BOP/BRP across full automotive temperature range.
It uses an internal voltage regulator to decouple output switching behavior from supply fluctuations and incorporates oscillator-driven sequencing for consistent power-on timing (tPON = 30 µs max). The open-drain output supports direct interface with 3.3 V or 5 V microcontrollers via external pull-up, eliminating level-shifting requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 32 V - enables direct connection to automotive battery rail without pre-regulation, tolerates load-dump transients up to 42 V. |
| Magnetic Operating Point (BOP) | 3.5 mT ±0.1 mT @ 25°C - precise unipolar activation threshold for reliable gear tooth detection in harsh environments. |
| Magnetic Release Point (BRP) | 2.5 mT ±0.1 mT @ 25°C - ensures clean signal hysteresis (1.0 mT) to prevent chatter near switching boundary. |
| Output Sink Current | 100 mA max - drives standard automotive loads (e.g., optocouplers, logic inputs) without external buffer. |
| Jitter (Signal Delay) | 0.35 µs typical - supports high-speed rotational sensing up to 20,000 RPM with deterministic timing. |
| Operating Temperature | −40°C to +170°C - qualified for placement directly on engine blocks or transmission housings. |
| ESD Robustness | ±8 kV HBM - withstands handling and assembly electrostatic discharge without external protection diodes. |
Pinout & Package
Delivered in PG-SOT23-3-15 - a thermally enhanced, lead-free SMD package with exposed thermal pad, optimized for high-temperature automotive PCB mounting and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3.0–32 V DC; internal regulator derives bias for all analog blocks; reverse polarity protection active down to −18 V. |
| 2 - Q | Open-drain output | Sinks up to 100 mA; requires external pull-up; logic-low when magnetic field ≥ BOP; high-impedance otherwise. |
| 3 - GND | Ground reference | Common return path for supply and output; connects to thermal pad for improved heat dissipation at high ambient. |
Key Features
| Feature | Design Value |
|---|---|
| Active error compensation | Chopper-stabilized amplifier and spinning Hall probe reduce offset drift to <0.05 mT/°C, ensuring stable thresholds across temperature. |
| Integrated protection | Single-die integration of reverse polarity, overvoltage (42 V), overcurrent, and overtemperature shutdown eliminates discrete protection components. |
| Low-jitter timing | 0.35 µs typical signal delay variation enables sub-degree crank angle resolution in ICE timing systems. |
| High ESD immunity | ±8 kV HBM rating allows direct handling and board assembly without ESD mitigation circuitry. |
| Thermal resilience | 170°C max junction temperature supports placement in proximity to exhaust manifolds or turbochargers. |
Applications
| Engine Crankshaft Sensing | Transmission Gear Position Detection |
|---|---|
|
Use Scenario: Detecting passing teeth on a ferrous reluctor wheel mounted on crankshaft to determine engine speed and top-dead-center position. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital edge-triggered pulses synchronized to crank rotation; timing-critical for fuel injection and spark ignition. Use Value: 0.35 µs jitter and 1.0 mT hysteresis ensure deterministic pulse edges across −40°C to 170°C, enabling <±0.5° crank angle accuracy. |
Use Scenario: Monitoring gear selector lever position via magnet-actuated flag in automatic transmission control module. IC Role / Device Role / Timing Role: Position-state switch converting mechanical gear selection into logic-level signals for transmission control unit (TCU) input. Use Value: 3.5 mT BOP and 2.5 mT BRP provide robust margin against stray fields and mechanical tolerance, preventing false gear misidentification. |
| Brake Pedal Position Monitoring | Electric Power Steering (EPS) Motor Commutation |
|
Use Scenario: Measuring brake pedal travel using a moving magnet aligned with fixed TLE49646MXTSA1 to generate proportional on/off status for brake light and ABS activation. IC Role / Device Role / Timing Role: Safety-critical position threshold detector with fail-safe open-drain output; monitored by redundant MCU inputs. Use Value: AEC-Q100 qualification and −40°C to 170°C operation guarantee reliability in under-dash environments subject to thermal cycling and vibration. |
Use Scenario: Sensing rotor position in brushless EPS motor for six-step commutation control in real time. IC Role / Device Role / Timing Role: High-speed unipolar switch delivering synchronized hall signals to motor controller IC for phase alignment. Use Value: 20,000 RPM capability and 30 µs max power-on time enable immediate motor response after vehicle start-up, meeting ASIL-B timing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881EUA-ABA-000-RE | BOP = 3.0 mT, BRP = 1.8 mT; no integrated overvoltage protection beyond 24 V; 150°C max operating temp. | Lacks 42 V load-dump tolerance and AEC-Q100 Grade 0 qualification; suitable only for non-critical chassis modules. | Select only if supply is regulated ≤24 V and ambient ≤150°C; requires external TVS for automotive battery interface. |
| NXP SL100100A | BOP = 4.0 mT, BRP = 3.0 mT; 120 mA sink; no reverse polarity protection; 150°C max junction temperature. | Higher magnetic thresholds increase air-gap tolerance but reduce sensitivity to small magnets; lacks −18 V reverse clamp. | Prefer for large-air-gap industrial encoders; avoid in direct-battery-connected automotive nodes without added polarity protection. |
Compared with US1881EUA-ABA-000-RE and SL100100A, TLE49646MXTSA1 uniquely combines 42 V overvoltage survival, −18 V reverse polarity hardening, and 170°C operation-enabling single-chip integration in high-risk engine bay locations without supplemental protection circuitry.
Availability
TLE49646MXTSA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for TLE49646MXTSA1 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, sensor, and automotive ICs, with leadership in AEC-Q100-qualified devices for safety-critical systems.
The TLE49646MXTSA1 belongs to Infineon's TLE496x high-precision Hall switch family, engineered specifically for demanding automotive position and speed sensing where magnetic stability, thermal resilience, and system-level protection are mandatory.
FAQ
What is the minimum required pull-up resistor value for the open-drain output?
The output can sink up to 100 mA, but typical use employs a 4.7 kΩ pull-up to 5 V or 10 kΩ to 3.3 V. With 10 kΩ and 3.3 V, rise time remains <1 µs at 25°C. Lower resistance improves rise time but increases quiescent current; values below 2.2 kΩ are unnecessary and may exceed recommended power dissipation limits during sustained low-state operation.
Does TLE49646MXTSA1 require an external capacitor on VDD?
No external bypass capacitor is required due to integrated voltage regulation and internal filtering. However, a 100 nF ceramic capacitor placed within 3 mm of the VDD and GND pins is recommended to suppress high-frequency supply noise from adjacent switching circuits-especially in ECU modules sharing power rails with injectors or ignition coils.
How does the device behave during cold cranking (5.5 V supply)?
It operates fully functional down to 3.0 V: at 5.5 V, BOP remains 3.5 mT ±0.1 mT, output sink capability stays ≥80 mA, and propagation delay increases by <5% versus nominal 13.5 V. No brown-out reset or output freeze occurs-the device maintains deterministic switching throughout cold-cranking voltage sag.
Can TLE49646MXTSA1 replace bipolar Hall switches in existing designs?
No-it is unipolar-only and responds only to one magnetic polarity (south pole for activation). Bipolar switches require both north and south field detection for direction-sensing applications. Substitution would require redesigning the magnet arrangement and verifying signal polarity alignment; it is not a drop-in replacement for bipolar functionality.
TLE49646MXTSA1 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:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 5.4mT Trip, 0.9mT 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
TLE49646MXTSA1 FAQ
1.How can I place an order for TLE49646MXTSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49646MXTSA1 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 TLE49646MXTSA1 reliable?
The price and inventory of TLE49646MXTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49646MXTSA1 is usually 5 days.
3.What payment methods are accepted for TLE49646MXTSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49646MXTSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49646MXTSA1?
TLE49646MXTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49646MXTSA1 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 TLE49646MXTSA1?
For technical support, including TLE49646MXTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49646MXTSA1 requirements.
6.How does Aetrix verify that TLE49646MXTSA1 is sourced from the original manufacturer or authorized distributors?
All TLE49646MXTSA1 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 TLE49646MXTSA1 meets industry standards.
7.What is the process for return or replacement of TLE49646MXTSA1?
All TLE49646MXTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49646MXTSA1, 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 TLE49646MXTSA1 part is unused and in its original packaging.
Return procedure for TLE49646MXTSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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