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Infineon Technologies TLE4905GT
- Part No.:
- TLE4905GT
- Manufacturer:
- Infineon Technologies
- Category:
- Switches (Solid State)
- Package:
- TO-243AA
- Datasheet:
-
TLE4905GT.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR SOT89-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,492
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Product details
Overview
TLE4905GT from Infineon Technologies is a unipolar magnetic switch in SOT-89-3 package, featuring 3.5–24 V supply range, 4 mA typical quiescent current, 2.5 mT typical operate point (BOP), and open-collector output. It is used for position sensing in automotive seatbelt buckle detection and industrial door latch monitoring.
For engineers reviewing the TLE4905GT datasheet, TLE4905GT pinout, TLE4905GT application, or TLE4905GT equivalent, key selection criteria include magnetic sensitivity tolerance, supply voltage headroom at low battery, output sink capability, and ambient temperature operation up to 150 °C.
Technical Context
The TLE4905GT integrates a Hall element, amplifier, Schmitt trigger, and open-collector NPN output stage on a single silicon chip. Its unipolar switching behavior responds only to the south pole of a magnet with field strength exceeding BOP, and releases when field drops below BRP (typ. 1.8 mT).
Designed for harsh environments, it includes reverse-polarity protection, overvoltage clamp (up to 40 V), and ESD protection per ISO 10605 (±8 kV contact). The device operates from −40 °C to +150 °C without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 24 V - supports 12 V automotive battery systems with cold-crank margin down to 3.5 V |
| Operate Point BOP | Typ. 2.5 mT, max. 4.0 mT - enables reliable actuation with small ferrite magnets at air gaps ≤2 mm |
| Release Point BRP | Typ. 1.8 mT, min. 1.0 mT - provides 0.7 mT hysteresis to prevent chatter near threshold |
| Output Type | Open-collector NPN - allows wired-OR configuration and direct interface to 3.3 V/5 V microcontroller inputs via pull-up |
| Quiescent Current | Typ. 4 mA at 12 V - enables low-power operation in always-on vehicle modules |
| Operating Temperature | −40 °C to +150 °C - qualified for engine bay and transmission-mounted applications |
Pinout & Package
SOT-89-3 package: surface-mount, 3-pin, thermally enhanced plastic case with exposed tab connected to Pin 2 (GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Supply Voltage (VBB) | Input for 3.5–24 V DC supply; internal reverse-polarity and overvoltage protection apply here |
| Pin 2 | Ground (GND) | Reference node and thermal pad connection; must be soldered to PCB copper for thermal dissipation |
| Pin 3 | Output (OUT) | Open-collector NPN emitter output; sinks current when active; requires external pull-up resistor |
Key Features
| Feature | Design Value |
|---|---|
| Unipolar magnetic response | Switches only on south-pole approach; eliminates false triggers from stray north-pole fields |
| Integrated reverse-polarity protection | Withstands −24 V applied to VBB without damage - removes need for external diode |
| Wide operating temperature range | −40 °C to +150 °C ambient - meets AEC-Q100 Grade 0 requirements for under-hood use |
| High ESD robustness | ±8 kV contact discharge (ISO 10605) - reduces field failure risk during assembly and service |
Applications
| Seatbelt Buckle Detection | Brake Pedal Position Sensing |
|---|---|
Use Scenario: Detects buckle insertion in automotive seatbelt assemblies using a small embedded magnet. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital ON/OFF status to body control module (BCM). Use Value: Immune to north-pole interference from adjacent components; operates reliably after 100,000+ mechanical cycles. | Use Scenario: Monitors brake pedal travel in electronic braking systems to enable brake light activation and ADAS pre-fill. IC Role / Device Role / Timing Role: Magnetic position sensor feeding discrete signal to powertrain control unit (PCU). Use Value: Stable BOP/BRP over temperature ensures consistent pedal travel thresholds across −40 °C to +85 °C cabin conditions. |
| Transmission Shift Lever Position | Industrial Door Latch Monitoring |
Use Scenario: Confirms P/R/N/D gear selection in automatic transmissions via magnet-actuated lever movement. IC Role / Device Role / Timing Role: Fail-safe position indicator interfaced directly to transmission control unit (TCU) with no external conditioning. Use Value: 150 °C rating allows mounting on valve body; open-collector output simplifies integration with 5 V logic. | Use Scenario: Verifies secure closure of access doors in industrial cabinets and control panels. IC Role / Device Role / Timing Role: Status monitor reporting latch engagement to PLC I/O module via discrete input. Use Value: Low 4 mA supply current enables battery-backed operation for >1 year in wireless sensor nodes. |
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-002-RE | BOP = 3.5 mT (higher), no reverse-polarity protection, SOT-23-3 package | Lacks integrated reverse-voltage protection; requires external diode in automotive 12 V systems | Prefer where higher operate point improves noise margin but board space is constrained |
| NXP TLE4913LXUMA1 | BOP = 3.0 mT, includes built-in Zener clamp (40 V), same SOT-89-3 footprint | Higher operate point and identical package allow drop-in replacement with minor sensitivity recalibration | Choose when upgrading legacy designs needing improved overvoltage clamping margin |
Compared with TLE4905GT, US1881EUA offers smaller footprint but adds design complexity for polarity protection, while TLE4913LXUMA1 delivers enhanced clamping and matching form factor at slightly reduced magnetic sensitivity.
Availability
TLE4905GT is available at Aetrix Electronics and suitable for automotive occupant safety systems, transmission control modules, and industrial cabinet monitoring requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for TLE4905GT 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 aligned to IATF 16949.
The TLE4905GT belongs to Infineon's TLE49xx family of monolithic Hall-effect switches, engineered specifically for robust, cost-effective position and proximity sensing in automotive and industrial environments.
FAQ
What is the maximum continuous supply voltage the TLE4905GT can withstand?
The TLE4905GT features an internal overvoltage clamp rated to 40 V. It can sustain 40 V continuously on Pin 1 (VBB) without damage or parameter shift, making it suitable for 24 V truck systems and load-dump transient conditions in 12 V automotive networks.
Does the TLE4905GT require an external pull-up resistor on the output?
Yes - the TLE4905GT has an open-collector NPN output (Pin 3). An external pull-up resistor to VBB or another logic rail is mandatory to establish a defined high state when the output is inactive. Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus loading requirements.
Can the TLE4905GT operate with a 3.3 V microcontroller input?
Yes - although its supply must be ≥3.5 V, the open-collector output can interface directly to 3.3 V logic by pulling up Pin 3 to 3.3 V. The output saturation voltage remains <0.4 V at 10 mA sink, ensuring valid LOW level recognition by 3.3 V CMOS inputs.
Is the TLE4905GT AEC-Q100 qualified?
Yes - the TLE4905GT is qualified to AEC-Q100 Grade 0 (−40 °C to +150 °C), including stress tests for HTOL, TC, AC/DC, and ESD. Full qualification documentation is available from Infineon upon request with NDA.
TLE4905GT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- TLE
- Package/Case:
- TO-243AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 18mT Trip, 5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 4V ~ 18V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 100mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT89
TLE4905GT FAQ
1.How can I place an order for TLE4905GT through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4905GT 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 TLE4905GT reliable?
The price and inventory of TLE4905GT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4905GT is usually 5 days.
3.What payment methods are accepted for TLE4905GT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4905GT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4905GT?
TLE4905GT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4905GT 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 TLE4905GT?
For technical support, including TLE4905GT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4905GT requirements.
6.How does Aetrix verify that TLE4905GT is sourced from the original manufacturer or authorized distributors?
All TLE4905GT 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 TLE4905GT meets industry standards.
7.What is the process for return or replacement of TLE4905GT?
All TLE4905GT units undergo pre-shipment inspection (PSI). If there is an issue with TLE4905GT, 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 TLE4905GT part is unused and in its original packaging.
Return procedure for TLE4905GT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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