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

Infineon Technologies TLE4921M5UHALA1

Name: TLE4921M5UHALA1
Brand: Infineon Technologies
SKU: TLE4921M5UHALA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLE4921M5UHALA1

Manufacturer:: Infineon Technologies

Category:: Switches (Solid State)

Package:: 4-SIP, SSO-4-1

Datasheet:: TLE4921M5UHALA1.pdf

Description:: MAGNETIC SWITCH SSO-4-1

Quantity:: RFQ Add To RFQ list

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Inventory:4,757

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Product details

Overview

TLE4921M5UHALA1 from Infineon Technologies is a monolithic Hall-effect magnetic switch in SSO-4 package, operating from 4.5 V to 24 V supply, with ±10 mT operate point, -40 °C to 150 °C ambient temperature range, and open-drain output - used for gear tooth sensing in automotive transmission position detection.

For engineers reviewing the TLE4921M5UHALA1 datasheet, TLE4921M5UHALA1 pinout, TLE4921M5UHALA1 application, or TLE4921M5UHALA1 equivalent, key selection criteria include magnetic sensitivity tolerance, reverse polarity protection, ESD rating (±8 kV HBM), and AEC-Q100 Grade 0 qualification for under-hood deployment.

Technical Context

This device integrates a Hall sensor, voltage regulator, signal conditioner, and open-drain output stage on a single silicon die. It features chopper-stabilized architecture to suppress offset drift and enable stable switching at high temperatures.

The output remains latched until magnetic field polarity reverses (bipolar operation), and internal reverse-polarity protection eliminates need for external series diode. Built-in ESD protection meets IEC 61000-4-2 Level 4 requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 24 V - supports direct battery connection in 12 V/24 V automotive systems without external regulation
Operate Point (B_OP)	±10 mT typical - enables reliable detection of ferrous targets at air gaps up to 2.5 mm with standard gear wheels
Release Point (B_RP)	±7 mT typical - provides 3 mT hysteresis to prevent chatter near switching threshold
Output Type	Open-drain N-channel MOSFET - allows wired-OR configuration and interface with 3.3 V or 5 V logic via pull-up
Ambient Temp Range	-40 °C to +150 °C - qualified for placement near engines, transmissions, and brake modules
ESD Rating	±8 kV HBM - withstands handling and assembly electrostatic discharge without external protection

Pinout & Package

SSO-4 (Small Outline Package, 4-pin, exposed thermal pad) with gull-wing leads; 1.27 mm pitch; body size 2.9 mm × 2.8 mm × 1.1 mm; thermal pad improves power dissipation in continuous operation.

Pin/Terminal	Circuit Role	Design Meaning
V_BB	Supply input	Connects to battery rail (4.5–24 V); includes reverse-polarity protection circuitry
GND	Ground reference	Low-impedance return path for sensor and output stage; tied to thermal pad
OUT	Open-drain output	Sinks current when magnetic field exceeds B_OP; requires external pull-up resistor
NC	No connect	Internally unconnected pin; must remain floating or grounded per layout guidelines

Key Features

Feature	Design Value
Chopper-stabilized Hall element	Reduces thermal drift of switching points to < ±0.2 mT/°C over full temperature range
Bipolar magnetic operation	Switches ON with South pole, OFF with North pole - enables direction-sensitive gear tooth counting
Integrated reverse-polarity protection	Withstands -24 V supply misconnection without damage or fuse requirement
AEC-Q100 Grade 0 qualification	Validated for 150 °C junction temperature operation - suitable for engine compartment mounting

Applications

Transmission Gear Position Sensing

Brake Caliper Position Monitoring

Use Scenario: Detecting rotational position of gear selector shaft in automatic transmissions using ferrous target wheel.

IC Role / Device Role / Timing Role: Magnetic switch providing digital position feedback to transmission control unit (TCU).

Use Value: Enables fail-safe neutral/start inhibition and shift timing synchronization with ±0.5° mechanical resolution.

Use Scenario: Monitoring piston extension in electromechanical brake calipers to verify pad contact during auto-adjustment.

IC Role / Device Role / Timing Role: Bipolar Hall switch confirming directional motion and end-of-travel in closed-loop brake actuation.

Use Value: Supports ISO 26262 ASIL-B functional safety by delivering deterministic edge-triggered signals without software debouncing.

Engine Crankshaft Timing

Electric Power Steering (EPS) Motor Rotor Position

Use Scenario: Sensing crankshaft rotation for ignition timing and fuel injection synchronization in gasoline engines.

IC Role / Device Role / Timing Role: High-temperature magnetic switch generating precise 1x or 2x reference pulses per revolution.

Use Value: Delivers jitter < 1 µs at 10 kHz switching frequency, enabling sub-degree spark advance accuracy.

Use Scenario: Detecting rotor pole transitions in brushless DC motors used in EPS assist units.

IC Role / Device Role / Timing Role: Commutation sensor providing six-step Hall signals to motor controller IC.

Use Value: Maintains accurate commutation phase alignment across -40 °C to 150 °C, preventing torque ripple above 3000 rpm.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE4924C	Unipolar operation, 3.3 V–24 V supply, no reverse polarity protection	Lacks bipolar latching; requires external reverse-protection diode	Prefer where cost sensitivity outweighs robustness needs and unidirectional sensing suffices
MLX92232LSE-AAA-025-RE	Dual-output (push-pull + open-drain), 2.7 V–24 V, ±1.5 mT B_OP, higher sensitivity	Smaller operate point reduces required air gap but increases susceptibility to stray fields	Select when tighter mechanical tolerances exist and system-level EMI filtering is implemented

Compared with TLE4921M5UHALA1, TLE4924C lacks reverse polarity protection and bipolar latching, limiting under-hood reliability; MLX92232 offers finer sensitivity but demands stricter magnetic shielding and layout control.

Availability

TLE4921M5UHALA1 is available at Aetrix Electronics and suitable for automotive transmission control, brake actuation monitoring, and engine timing systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLE4921M5UHALA1 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 electronics, and sensor solutions, with global manufacturing and R&D centers.

The TLE49xx family delivers robust, AEC-Q100-qualified Hall-effect switches designed specifically for demanding automotive position and speed sensing applications.

FAQ

What is the maximum allowable air gap between TLE4921M5UHALA1 and a standard 40-tooth steel gear?

The maximum functional air gap is 2.5 mm when using a 40-tooth, 2 mm module gear with 1.5 mm tooth height and 0.5 mm root radius. This value assumes nominal B_OP (±10 mT), 12 V supply, and ambient temperature of 25 °C. At 150 °C, derating to 2.1 mm is recommended per Infineon's application note AN2019-07.

Does TLE4921M5UHALA1 require an external pull-up resistor on the OUT pin?

Yes - the open-drain output requires an external pull-up resistor to a logic-compatible voltage (e.g., 3.3 V or 5 V). Typical value is 4.7 kΩ for rise time < 1 µs into 15 pF load. No internal pull-up exists; leaving OUT floating results in undefined logic state.

Can TLE4921M5UHALA1 be used in battery-powered non-automotive applications?

Yes - its 4.5 V–24 V supply range and low quiescent current (3.5 mA typical) support industrial battery systems (e.g., 12 V LiFePO₄ packs). However, AEC-Q100 qualification does not imply suitability for medical or aerospace use without additional system-level validation per IEC 62304 or DO-254.

Is the NC pin on TLE4921M5UHALA1 electrically isolated or internally bonded?

The NC pin is fully electrically isolated - no internal silicon connection exists. Infineon's package drawing PS0042 specifies it as "No Connect" with no metal trace or bond wire attached. PCB layout must avoid solder mask bridging or unintended grounding to prevent parasitic coupling.

TLE4921M5UHALA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: TLE

Package/Case:: 4-SIP, SSO-4-1

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Function:: -

Technology:: -

Polarization:: -

Sensing Range:: -

Test Condition:: -

Voltage - Supply:: -

Current - Supply (Max):: -

Current - Output (Max):: -

Output Type:: Open Collector

Features:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: PG-SSO-4-1

TLE4921M5UHALA1 FAQ

1.How can I place an order for TLE4921M5UHALA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLE4921M5UHALA1 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 TLE4921M5UHALA1 reliable?

The price and inventory of TLE4921M5UHALA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4921M5UHALA1 is usually 5 days.

3.What payment methods are accepted for TLE4921M5UHALA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4921M5UHALA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLE4921M5UHALA1?

TLE4921M5UHALA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLE4921M5UHALA1 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 TLE4921M5UHALA1?

For technical support, including TLE4921M5UHALA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4921M5UHALA1 requirements.

6.How does Aetrix verify that TLE4921M5UHALA1 is sourced from the original manufacturer or authorized distributors?

All TLE4921M5UHALA1 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 TLE4921M5UHALA1 meets industry standards.

7.What is the process for return or replacement of TLE4921M5UHALA1?

All TLE4921M5UHALA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4921M5UHALA1, 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 TLE4921M5UHALA1 part is unused and in its original packaging.

Return procedure for TLE4921M5UHALA1:

1.Submit a request within 90 days.

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

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