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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Infineon Technologies TLI4906KHTSA1

Name: TLI4906KHTSA1
Brand: Infineon Technologies
SKU: TLI4906KHTSA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLI4906KHTSA1

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TLI4906KHTSA1.pdf

Description:: MAGNETIC SWITCH UNIPOL SC59

Quantity:: RFQ Add To RFQ list

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Inventory:5,490

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Product details

Overview

TLI4906KHTSA1 from Infineon is a high-precision Hall effect switch in PG-SC59-3-4 package, designed for position sensing with ±350 ppm/°C temperature-compensated magnetic thresholds (B_OP = 10.0 mT typ., B_RP = 8.5 mT typ.), 2.7–18 V supply operation, open-drain 20 mA sink output, and 1 µs typical jitter - deployed in industrial security systems and consumer push-button interfaces.

For engineers reviewing the TLI4906KHTSA1 datasheet, TLI4906KHTSA1 pinout, TLI4906KHTSA1 application, or TLI4906KHTSA1 equivalent, key selection criteria include magnetic hysteresis (1.5 mT typ.), reverse battery protection (−18 V), low thermal resistance (100 K/W), and compatibility with unregulated supplies in non-automotive industrial and consumer environments.

Technical Context

The TLI4906KHTSA1 integrates a chopper-stabilized Hall probe with on-chip bias generation, active error compensation, and a low-pass filtered comparator with hysteresis to reject mechanical stress-induced offsets and ensure stable switching across −40°C to +125°C ambient. Its oscillator-driven chopping operates at 320 kHz to suppress DC drift and 1/f noise.

It delivers digital open-drain output with 0.3 V saturation voltage at 20 mA sink, supports magnetic field detection via south-pole activation (B_OP) and north-pole release (B_RP), and features reverse polarity protection enabling robust deployment in battery-powered or field-wired equipment without external diodes.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7 V to 18 V - enables direct connection to unregulated 12 V rails or Li-ion battery stacks without LDO.
Magnetic Operate Point	10.0 mT typ. (6.2–13.9 mT) - precise position detection with minimal magnet size or air gap.
Output Sink Current	20 mA - drives standard logic-level pull-ups or small relays directly without buffer stage.
Jitter	1 µs RMS - ensures deterministic timing in high-speed counting or edge-triggered control loops.
Reverse Polarity Protection	−18 V - eliminates need for external series diode in battery-reversal-prone installations.
ESD Robustness	±4 kV HBM - withstands handling and board-level ESD events without shielding or clamping.
Thermal Resistance	100 K/W (junction-to-ambient) - supports continuous operation at full load up to 125°C ambient.

Pinout & Package

TLI4906KHTSA1 uses the PG-SC59-3-4 surface-mount package (3-pin SOT-23 variant), with exposed pad for thermal enhancement and defined sensitive area centered under pin 1.

Pin/Terminal	Circuit Role	Design Meaning
1 (VS)	Supply input	Accepts 2.7–18 V with integrated reverse-battery protection; connects to system rail.
2 (Q)	Open-drain output	Sinks up to 20 mA; requires external pull-up; asserts low when south pole exceeds B_OP.
3 (GND)	Ground reference	Return path for supply and output current; ties to PCB ground plane for EMC stability.

Key Features

Feature	Design Value
Active error compensation	Rejects offset drift from molding stress, solder thermal cycling, and PCB flex - maintains <±0.5 mT threshold shift over life.
Chopper stabilization	320 kHz modulation cancels 1/f noise and Hall element offset - enables sub-mT resolution at 125°C.
Temperature-compensated thresholds	−350 ppm/°C TC ensures B_OP/B_RP drift ≤ ±0.4 mT over −40°C to +125°C - no calibration required.
Digital open-drain interface	Compatible with 3.3 V, 5 V, and 12 V logic families; simplifies level-shifting and reduces BOM count.
Low jitter timing	1 µs RMS output delay variation enables reliable pulse counting at ≥10 kHz magnetic signal rates.

Applications

Security Systems

Consumer Push Buttons

Use Scenario: Door/window contact sensing in alarm panels using embedded magnets and PCB-mounted sensors.

IC Role / Device Role / Timing Role: Hall switch detecting magnet proximity to trigger tamper alerts with repeatable 10.0 mT operate point.

Use Value: Eliminates mechanical switch wear and bounce; maintains accuracy after 100k+ actuations and thermal cycling.

Use Scenario: Tactile feedback activation in appliance control panels where physical buttons are sealed behind glass.

IC Role / Device Role / Timing Role: Position detector translating magnet movement into clean digital edge for microcontroller wake-up or state change.

Use Value: Enables IP65-rated front panels with zero moving contacts; immune to dust, moisture, and cleaning agents.

Machine Tool Alignment

Industrial Key Switches

Use Scenario: Precision linear stage homing using fixed magnets and sensor arrays on CNC gantries.

IC Role / Device Role / Timing Role: High-stability threshold device providing repeatable zero-reference position within ±0.2 mm tolerance.

Use Value: Maintains positional accuracy across 0–125°C ambient swings without recalibration or lookup tables.

Use Scenario: Operator-accessible safety interlock switches on factory equipment requiring positive break-on-open action.

IC Role / Device Role / Timing Role: Fail-safe magnetic actuator confirming physical key rotation before enabling power or motion sequences.

Use Value: Prevents unauthorized access via mechanical bypass; meets IEC 60947-5-1 requirements for reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall effect switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLI4906LHTSA1	PG-SSO-3-2 package (different pinout: VS-GND-Q), higher R_thJA (190 K/W), identical electrical specs.	Better suited for space-constrained layouts where GND-first routing is preferred; lower thermal performance limits max ambient to 105°C at full load.	Select when footprint constraints favor SSO-3 over SC59-3 or when GND pin placement simplifies PCB grounding.
US1881EUA-AMI	Wider B_OP range (3–25 mT), no active error compensation, 2.5–24 V supply, 50 mA sink, no reverse polarity protection.	Requires external reverse-protection diode and tighter magnet tolerancing; less stable over temperature (±1000 ppm/°C).	Choose only for cost-sensitive, non-critical applications where magnet strength varies widely and thermal drift is acceptable.

Compared with TLI4906LHTSA1, the TLI4906KHTSA1 offers superior thermal dissipation and SC59-3 pin alignment for legacy designs; versus US1881EUA-AMI, it delivers tighter magnetic thresholds, built-in reverse protection, and active stress compensation - critical for long-life industrial deployments.

Availability

TLI4906KHTSA1 is available at Aetrix Electronics and suitable for security systems, consumer push-button interfaces, and industrial machine tool alignment requiring stable component supply, consistent magnetic threshold performance, and extended temperature operation.

Supply support for TLI4906KHTSA1 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 global manufacturing and quality certification to ISO 9001 and IATF 16949.

The TLI4906KHTSA1 belongs to Infineon's high-precision Hall switch product line, engineered specifically for industrial and consumer position-sensing applications demanding accuracy, thermal stability, and robustness - not automotive-qualified.

FAQ

What is the maximum ambient temperature for continuous operation of TLI4906KHTSA1?

The TLI4906KHTSA1 is rated for continuous operation from −40°C to +125°C ambient. At 125°C, junction temperature remains within safe limits (≤150°C) due to its 100 K/W thermal resistance and typical 4 mA supply current - verified per absolute maximum ratings table in the official Infineon datasheet Rev. 1.1.

Does TLI4906KHTSA1 require an external pull-up resistor on the Q pin?

Yes - the Q pin is an open-drain output and must be pulled up externally. The datasheet recommends a 1.2 kΩ resistor to the same supply rail as VS to limit sink current to ≤20 mA while ensuring fast rise time (<1 µs). No internal pull-up is integrated.

Can TLI4906KHTSA1 detect both north and south magnetic poles?

No - it responds only to south-pole fields for turn-on (B_OP) and north-pole fields for turn-off (B_RP). The branded side of the package defines the sensitive direction: south pole applied to that face activates the output; north pole deactivates it. Bidirectional detection is not supported.

Is TLI4906KHTSA1 qualified for automotive use?

No - the datasheet explicitly states "Not suitable for automotive applications." It lacks AEC-Q100 qualification, automotive-grade screening, and extended reliability testing. It is intended solely for industrial and consumer equipment operating within commercial/industrial temperature and stress profiles.

TLI4906KHTSA1 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:: 13.9mT Trip, 4.7mT Release

Test Condition:: -40°C ~ 125°C

Voltage - Supply:: 2.7V ~ 18V

Current - Supply (Max):: 6mA

Current - Output (Max):: 20mA

Output Type:: Open Drain

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-SC59-3

TLI4906KHTSA1 FAQ

1.How can I place an order for TLI4906KHTSA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLI4906KHTSA1 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 TLI4906KHTSA1 reliable?

The price and inventory of TLI4906KHTSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLI4906KHTSA1 is usually 5 days.

3.What payment methods are accepted for TLI4906KHTSA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLI4906KHTSA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLI4906KHTSA1?

TLI4906KHTSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLI4906KHTSA1 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 TLI4906KHTSA1?

For technical support, including TLI4906KHTSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLI4906KHTSA1 requirements.

6.How does Aetrix verify that TLI4906KHTSA1 is sourced from the original manufacturer or authorized distributors?

All TLI4906KHTSA1 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 TLI4906KHTSA1 meets industry standards.

7.What is the process for return or replacement of TLI4906KHTSA1?

All TLI4906KHTSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLI4906KHTSA1, 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 TLI4906KHTSA1 part is unused and in its original packaging.

Return procedure for TLI4906KHTSA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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