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Infineon Technologies TLE49421HALA1
- Part No.:
- TLE49421HALA1
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- 2-SIP, SSO-2-2
- Datasheet:
-
TLE49421HALA1.pdf
- Description:
- MAG SWITCH SPEC PURP SSO-2-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
TLE49421HALA1 from Infineon Technologies is a differential two-wire Hall effect sensor IC for automotive wheel speed sensing with integrated direction detection, airgap diagnosis, and assembly position diagnosis. It operates over –40 °C to +150 °C, delivers PWM current output with pulse-length encoding for speed, direction (DR-R/DR-L), warning (airgap), and EL (assembly) states, and requires no external components.
For engineers reviewing the TLE49421HALA1 datasheet, TLE49421HALA1 pinout, TLE49421HALA1 application in ABS or vehicle dynamics control, or TLE49421HALA1 equivalent for wheel speed sensing with direction output, this device provides calibrated differential flux measurement, dynamic self-calibration, and robust EMI performance via integrated 1.8 nF capacitor.
Technical Context
The TLE49421HALA1 implements a monolithic BiCMOS architecture with three Hall probes (Left, Center, Right) spaced 2.5 mm apart, computing differential flux ΔB = (Left + Right)/2 − Center. Its digital signal processor performs real-time offset cancellation using a tracking ADC/DAC loop and supports both uncalibrated startup (after ≥2 magnetic edges) and full-calibrated operation.
Output encoding uses PWM pulse length modulation: nominal speed pulses (~180° phase shift), DR-R/DR-L pulses encode rotation direction relative to pin orientation (GND→VCC or VCC→GND), while ∆BWarning and ∆BLimit pulses indicate degraded airgap conditions. The internal voltage regulator enables direct two-wire connection to 5–24 V supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp | –40 °C to +150 °C: Enables under-hood deployment in ABS, ESC, and transmission control modules. |
| Supply Range | 5–24 V two-wire: Eliminates separate ground return; simplifies harness routing and connector count. |
| Output Interface | PWM current sink (2–12 mA): Encodes speed, direction, airgap warning, and assembly status in pulse length - no external signal conditioning needed. |
| Differential Sensing | Three-probe topology (2.5 mm spacing): Rejects common-mode mechanical stress and magnet offset up to ±20 mT. |
| Airgap Diagnosis | ∆BWarning / ∆BLimit thresholds: Triggers diagnostic pulses when target distance exceeds design limits - supports ISO 26262 ASIL-B functional safety monitoring. |
| Self-Calibration | Dynamic offset cancellation: Completes within ≤2 magnetic transitions; maintains accuracy across temperature and aging without factory calibration. |
| EMI Suppression | Integrated 1.8 nF capacitor (PG-SSO-2-2 variant): Reduces radiated emissions in high-noise chassis environments without PCB layout dependency. |
Pinout & Package
Package: PG-SSO-2-2 - surface-mount, 2-pin, plastic small-outline package with exposed thermal pad; optimized for automotive under-hood mounting and automated reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V | Supply Input / Current Output Sink | Two-wire interface node: accepts 5–24 V supply and sinks modulated output current (2–12 mA); no separate ground pin required. |
| GND | Reference Terminal | System ground reference for internal regulator and Hall probe biasing; tied to chassis ground in vehicle installation. |
Key Features
| Feature | Design Value |
|---|---|
| Differential Flux Detection | Uses three Hall elements (L/C/R) to compute (L+R)/2−C - cancels uniform mechanical stress and magnet misalignment. |
| Direction Encoding | DR-R and DR-L pulse lengths indicate rotational direction relative to physical pin orientation (GND→VCC or VCC→GND). |
| Assembly Position Diagnosis | EL pulse indicates correct mounting airgap before full calibration - enables end-of-line verification without rotating target. |
| Dynamic Offset Compensation | Real-time DSP-based DAC feedback loop updates offset every cycle - eliminates drift from temperature, vibration, and aging. |
| No External Components | Monolithic integration includes regulator, oscillator, ADC/DAC, DSP, and output stage - reduces BOM cost and PCB area by >30% vs discrete solutions. |
Applications
| ABS Wheel Speed Sensing | Electronic Stability Control (ESC) |
|---|---|
Use Scenario: Mounted adjacent to ferromagnetic toothed wheel on vehicle axle to monitor rotational speed and direction during braking events. IC Role / Device Role / Timing Role: Differential Hall sensor providing PWM-encoded speed and DR-R/DR-L pulses to ABS ECU for wheel lock detection and pressure modulation. Use Value: Enables precise slip ratio calculation and directional discrimination for cornering brake vectoring - critical for yaw rate correction. | Use Scenario: Integrated into ESC module to detect individual wheel motion during aggressive steering or low-traction maneuvers. IC Role / Device Role / Timing Role: Direction-aware wheel speed transducer feeding real-time velocity vectors to ESC controller for lateral stability intervention. Use Value: Supports simultaneous multi-wheel torque modulation by distinguishing forward/reverse rotation during split-μ braking or trail-braking scenarios. |
| Transmission Input Speed Sensing | Electric Power Steering (EPS) Motor Commutation |
Use Scenario: Installed on transmission input shaft gear to monitor turbine speed for torque converter lock-up and gearshift timing. IC Role / Device Role / Timing Role: High-temperature wheel speed sensor delivering calibrated speed pulses and airgap diagnostics to TCU. Use Value: Enables adaptive shift scheduling and early airgap degradation detection - prevents false slip interpretation during high-load shifts. | Use Scenario: Mounted on EPS motor rotor to provide commutation timing and direction feedback for brushless DC motor control. IC Role / Device Role / Timing Role: Direction-sensitive speed sensor supplying DR-R/DR-L pulses and speed PWM to EPS MCU for field-oriented control. Use Value: Allows instantaneous reversal detection and torque ripple suppression during parking maneuvers - improves steering feel and energy efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wheel speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE4942-1C | Includes 1.8 nF overmolded capacitor; identical pinout, function, and calibration logic. | Enhanced EMI immunity in high-noise powertrain environments; same mechanical footprint. | Select when system-level EMC testing shows marginal radiated emissions near 100–500 MHz. |
| ATS6858LSGT | Dual-output (speed + direction) with analog/digital hybrid interface; no integrated airgap diagnosis. | Lacks ∆BWarning/EL pulse encoding; requires external ADC or microcontroller decoding. | Choose only if existing design already implements custom pulse decoding and EMI filtering. |
Compared with TLE4942-1C, the TLE49421HALA1 offers identical functionality but may lack the integrated capacitor depending on date code; compared with ATS6858LSGT, it delivers fully self-contained diagnostic encoding and lower system-level component count - reducing validation effort for ASIL-B compliance.
Availability
TLE49421HALA1 is available at Aetrix Electronics and suitable for ABS, ESC, and transmission control systems requiring stable component supply, automotive-grade temperature resilience, and functional safety-aware diagnostics.
Supply support for TLE49421HALA1 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global R&D and manufacturing infrastructure.
The TLE4942 series belongs to Infineon's automotive Hall sensor product line, engineered specifically for wheel speed and direction sensing in safety-critical vehicle dynamics systems - emphasizing diagnostic integrity, thermal robustness, and EMI resilience.
FAQ
What is the difference between TLE49421HALA1 and TLE4942-1C?
TLE49421HALA1 is the ordering code for the TLE4942-1 variant in PG-SSO-2-1 package without integrated capacitor; TLE4942-1C (Q62705-K709) uses PG-SSO-2-2 with 1.8 nF overmolded capacitor for enhanced EMI suppression. Both share identical pinout, calibration algorithm, and diagnostic encoding.
Does TLE49421HALA1 require external calibration or programming?
No. The device performs automatic dynamic self-calibration during initial power-up using its internal DSP and offset DAC loop. Only two magnetic transitions are needed to enter calibrated mode; no external tools, firmware, or factory programming are required.
Can TLE49421HALA1 operate with a back-biasing magnet on either pole face?
Yes. The datasheet explicitly permits South or North pole attachment to the unmarked rear side of the package. The differential architecture and self-calibration accommodate either polarity without performance degradation or configuration change.
What failure modes does the airgap warning feature detect?
The airgap warning (∆BWarning pulse) triggers when differential magnetic flux falls below a threshold indicating excessive airgap - typically caused by sensor misalignment, target warping, or magnet demagnetization. It operates only in calibrated mode and enables early maintenance alerts before functional loss occurs.
TLE49421HALA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 2-SIP, SSO-2-2
- Packaging:
- Cut Tape (CT)
- Product Status:
- Last Time Buy
- Function:
- Special Purpose
- Technology:
- Hall Effect
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- 4.5V ~ 20V
- Current - Supply (Max):
- 16.8mA
- Current - Output (Max):
- -
- Output Type:
- Current Source
- Features:
- -
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- PG-SSO-2-2
TLE49421HALA1 FAQ
1.How can I place an order for TLE49421HALA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE49421HALA1 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 TLE49421HALA1 reliable?
The price and inventory of TLE49421HALA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE49421HALA1 is usually 5 days.
3.What payment methods are accepted for TLE49421HALA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE49421HALA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE49421HALA1?
TLE49421HALA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE49421HALA1 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 TLE49421HALA1?
For technical support, including TLE49421HALA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE49421HALA1 requirements.
6.How does Aetrix verify that TLE49421HALA1 is sourced from the original manufacturer or authorized distributors?
All TLE49421HALA1 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 TLE49421HALA1 meets industry standards.
7.What is the process for return or replacement of TLE49421HALA1?
All TLE49421HALA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE49421HALA1, 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 TLE49421HALA1 part is unused and in its original packaging.
Return procedure for TLE49421HALA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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