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Infineon Technologies TLE49646MXTMA1
- Part No.:
- TLE49646MXTMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TLE49646MXTMA1.pdf
- Description:
- MAG SWITCH UNIPOLAR SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,279
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Product details
Overview
TLE49646MXTMA1 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, features open-drain output, ±0.5 mT magnetic threshold stability over −40°C to +170°C, and delivers typ. 0.35 µs signal jitter - used in engine camshaft/crankshaft sensing and transmission gear detection.
For engineers reviewing the TLE49646MXTMA1 datasheet, TLE49646MXTMA1 pinout, TLE49646MXTMA1 application, or TLE49646MXTMA1 equivalent, key selection criteria include magnetic operating point (BOP = 3.5 mT), release point (BRP = 2.5 mT), reverse polarity tolerance (−18 V), load-dump resilience (42 V without external resistor), and AEC-Q100 qualification for under-hood deployment.
Technical Context
The TLE49646MXTMA1 integrates a spinning Hall probe with chopper-stabilized amplifier, low-pass filtering, and comparator with hysteresis to suppress noise-induced switching. Its internal voltage regulator enables stable operation across wide input transients, while active error compensation maintains magnetic threshold accuracy over temperature and lifetime.
It implements overtemperature and overcurrent protection with automatic recovery, and uses an oscillator-driven sequencer to synchronize internal blocks - eliminating external timing components and supporting robust start-up behavior even after brown-out events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 32 V - supports direct connection to automotive battery without pre-regulation, tolerates load-dump spikes up to 42 V |
| Magnetic Operating Point (BOP) | 3.5 mT ±0.5 mT - precise activation threshold for reliable cam/crank tooth detection at high RPM |
| Magnetic Release Point (BRP) | 2.5 mT ±0.5 mT - ensures clean hysteresis margin (1.0 mT) to prevent chatter near field zero-crossing |
| Output Type | Open-drain N-channel MOSFET - allows flexible pull-up configuration and wired-OR interfacing with microcontroller inputs |
| Signal Jitter | Typ. 0.35 µs - enables accurate timing resolution for <1° crankshaft angular position estimation |
| Operating Temperature | −40°C to +170°C - qualified for placement directly on engine blocks or near exhaust manifolds |
| ESD Robustness | HBM ±8 kV - eliminates need for external TVS in most PCB layouts per ISO 10605 |
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 | Accepts 3.0–32 V DC; includes reverse polarity protection (−18 V) and internal regulation for analog core stability |
| 2 (Q) | Open-Drain Output | Sinks current when active; requires external pull-up; supports 20 mA max sink current with thermal foldback |
| 3 (GND) | Ground Reference | Common return path for supply and output; electrically tied to thermal pad for improved heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Wide Supply Range with Load-Dump Tolerance | Operates from 3.0 V to 32 V and withstands 42 V transients without external clamping resistor - reduces BOM count in 12 V/24 V systems |
| Thermally Stable Magnetic Thresholds | BOP and BRP drift ≤ ±0.5 mT over −40°C to +170°C - enables single calibration across full vehicle life without recalibration |
| Integrated Overtemperature Protection | Shuts down output above junction temperature limit and auto-recovers when cooled - prevents latch-up during thermal overload |
| Chopper-Stabilized Signal Chain | Eliminates offset drift and 1/f noise in Hall sensor and amplifier - achieves sub-millitesla repeatability in harsh EMI environments |
| Reverse Polarity Protection | Withstands −18 V applied to VDD - protects against battery misconnection during service or assembly |
Applications
| Engine Camshaft Sensing | Transmission Gear Position Detection |
|---|---|
|
Use Scenario: Detecting cam lobe presence in gasoline/diesel engines for variable valve timing control and cylinder deactivation. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital edge-triggered signal synchronized to cam rotation phase. Use Value: 0.35 µs jitter enables <0.8° crank angle resolution at 8000 RPM, meeting OEM timing accuracy requirements. |
Use Scenario: Monitoring gear selector lever position in automatic transmissions using ferrous target plates mounted on shift forks. IC Role / Device Role / Timing Role: High-immunity magnetic switch converting mechanical position into logic-level status for transmission control unit (TCU). Use Value: −40°C to +170°C operation allows direct mounting on transmission housing without heatsink or derating. |
| Brake Pedal Position Monitoring | Electric Power Steering (EPS) Motor Commutation |
|
Use Scenario: Redundant pedal travel sensing in brake-by-wire systems where functional safety (ASIL-B) compliance is required. IC Role / Device Role / Timing Role: Primary or secondary position switch validating driver intent before actuating electro-hydraulic brakes. Use Value: AEC-Q100 Grade 0 qualification and ±0.5 mT BOP stability ensure consistent trip points across 15-year vehicle lifetime. |
Use Scenario: Rotor position feedback for brushless DC motor commutation in EPS assist motors. IC Role / Device Role / Timing Role: Unipolar Hall sensor detecting magnet poles on motor shaft to sequence inverter gate drive signals. Use Value: 32 V max supply and 42 V load-dump tolerance match EPS power architecture, eliminating need for external transient suppressors. |
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-REEL | Lower supply range (3.5–24 V); no load-dump tolerance beyond 28 V; BOP = 3.0 mT (±0.3 mT) | Lacks AEC-Q100 Grade 0 rating; rated only to +150°C - unsuitable for direct engine-mount use | Select if cost-sensitive and operating environment stays below 150°C with regulated supply |
| Allegro A1120EUA-T | Wider BOP hysteresis (1.5 mT); higher jitter (1.2 µs); no integrated overtemperature shutdown | Not qualified to AEC-Q100; limited to industrial temp range (−40°C to +150°C) | Choose only for non-automotive, lower-speed position sensing where thermal safety is externally managed |
Compared with US1881EUA-ABA-000-REEL and A1120EUA-T, TLE49646MXTMA1 provides superior thermal margin, tighter magnetic tolerance, and built-in fault protection - making it the only option qualified for ASIL-B–relevant engine and transmission subsystems.
Availability
TLE49646MXTMA1 is available at Aetrix Electronics and suitable for engine management systems, transmission control units, brake-by-wire modules, and electric power steering requiring stable component supply across extended temperature and voltage stress conditions.
Supply support for TLE49646MXTMA1 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 automotive qualification infrastructure.
TLE49646MXTMA1 belongs to the TLE496x family of high-precision Hall switches engineered for demanding automotive position and speed sensing - emphasizing magnetic stability, supply resilience, and functional safety readiness.
FAQ
What is the maximum continuous sink current capability of the TLE49646MXTMA1 output?
The output can continuously sink up to 20 mA at 25°C ambient, with thermal foldback reducing current above 125°C junction temperature. The device includes internal overcurrent protection that limits peak current to 40 mA and recovers automatically once fault condition clears.
Does the TLE49646MXTMA1 require an external pull-up resistor?
Yes - the open-drain output requires 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 6 in the datasheet shows a standard application circuit using only this resistor.
Can the TLE49646MXTMA1 operate reliably during cold-cranking conditions?
Yes - its 3.0 V minimum supply voltage and internal regulator allow stable operation down to 2.7 V (per characterization data), covering typical cold-cranking dips to 4–6 V in 12 V systems and 8–10 V in 24 V commercial vehicles.
Is the PG-SOT23-3-15 package RoHS and REACH compliant?
Yes - the PG-SOT23-3-15 package is lead-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with full material declarations available via Infineon's product change notification system.
TLE49646MXTMA1 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
TLE49646MXTMA1 FAQ
1.How can I place an order for TLE49646MXTMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49646MXTMA1 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 TLE49646MXTMA1 reliable?
The price and inventory of TLE49646MXTMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49646MXTMA1 is usually 5 days.
3.What payment methods are accepted for TLE49646MXTMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49646MXTMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49646MXTMA1?
TLE49646MXTMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49646MXTMA1 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 TLE49646MXTMA1?
For technical support, including TLE49646MXTMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49646MXTMA1 requirements.
6.How does Aetrix verify that TLE49646MXTMA1 is sourced from the original manufacturer or authorized distributors?
All TLE49646MXTMA1 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 TLE49646MXTMA1 meets industry standards.
7.What is the process for return or replacement of TLE49646MXTMA1?
All TLE49646MXTMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49646MXTMA1, 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 TLE49646MXTMA1 part is unused and in its original packaging.
Return procedure for TLE49646MXTMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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