Infineon Technologies TLE4939

Overview

TLE493D-A1B6 from Infineon Technologies is an automotive-qualified 3D Hall-effect magnetic sensor IC delivering simultaneous B_x, B_y, and B_z field measurements with ±60 mT range, 12-bit resolution per axis, and integrated temperature sensing. It operates from 2.9 V to 3.5 V, consumes just 5 µA typical in active mode (6 Hz), and supports I²C interface with interrupt signaling - used for gear stick position, pedal/valve sensing, and multi-function knob interfaces.

For engineers reviewing the TLE493D-A1B6 datasheet, TLE493D-A1B6 pinout, TLE493D-A1B6 application, or TLE493D-A1B6 equivalent, key selection criteria include its ultra-low-power operation across -40°C to +125°C junction temperature, configurable update rates, open-drain interrupt capability, and TSOP6 package compatibility with space-constrained automotive control modules.

Technical Context

The device integrates three orthogonal spinning vertical Hall plates (X/Y/Z) sequentially multiplexed to a single ADC, enabling true 3D vector field reconstruction. Its power mode controller includes both low-power and fast oscillators, enabling dynamic switching between 7 nA power-down and measurement-active states without external reset circuitry.

Each measurement cycle captures all three magnetic axes plus on-chip temperature by default, with register-controlled configuration of sampling frequency, power modes, and interrupt behavior via standard I²C protocol. The ADDR pin sets slave address at power-up, and /INT provides asynchronous end-of-cycle notification to host microcontroller.

Key Specifications

Pinout & Package

Package: PG-TSOP6-6-5 - 6-pin thin shrink small-outline package (2.9 mm × 1.5 mm × 1.0 mm height), surface-mount, RoHS-compliant, optimized for automated assembly in automotive ECUs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3D magnetic sensing applications.

Compared with MLX90393 and A1335, the TLE493D-A1B6 uniquely balances ultra-low power (7 nA standby), automotive qualification, and integrated interrupt signaling - making it optimal for cost- and energy-sensitive automotive human-machine interface modules.

Availability

TLE493D-A1B6 is available at Aetrix Electronics and suitable for gear stick position sensing, pedal/valve monitoring, and multi-function knob interfaces requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for TLE493D-A1B6 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 R&D and manufacturing infrastructure.

The TLE493D-A1B6 belongs to Infineon's TLE493D 3D Hall sensor product line, designed specifically for contactless position and motion sensing in automotive human-machine interface (HMI) systems under stringent environmental and safety requirements.

FAQ

What is the I²C address configuration method for TLE493D-A1B6?

The I²C slave address is set at power-up by the logic level on the SDA/ADDR pin: pulled low = 0x2A, pulled high = 0x2B. This configuration is latched internally and remains fixed until next power cycle - no software reconfiguration is supported. External pull-up/pull-down resistors must be sized to ensure stable logic levels during VDD ramp-up.

Does TLE493D-A1B6 require external components for basic operation?

No external passive components are required for fundamental operation: only VDD decoupling capacitor (100 nF ceramic, placed ≤2 mm from VDD/GND pins) and I²C bus pull-ups (typically 4.7 kΩ) are needed. The internal temperature sensor, oscillator, and biasing circuits are fully self-contained - eliminating external calibration or timing components.

How does the /INT pin function in different power modes?

The /INT pin asserts low upon completion of each full measurement cycle - including all three magnetic axes and temperature - regardless of active, standby, or power-down mode. In power-down mode, /INT remains inactive until woken by I²C traffic; it does not generate autonomous interrupts. The pin is open-drain and requires external pull-up.

Can TLE493D-A1B6 detect magnet polarity and distinguish North vs South orientation?

Yes - the signed 12-bit outputs for B_x, B_y, and B_z provide full directional vector information, enabling unambiguous determination of magnet polarity and spatial orientation relative to the sensor die. This allows algorithms to compute absolute angle, tilt, and proximity without ambiguity, even with diametrically magnetized magnets.