Infineon Technologies TLE9845QXXUMA1

Overview

TLE9845QXXUMA1 from Infineon Technologies is a 32-bit Arm® Cortex®-M0 automotive microcontroller integrating LIN 2.2 transceiver, two high-side (≥150 mA) and two low-side power switches with PWM, 10-bit ADC (6 channels + 5 HV monitor inputs), and dual LDOs (1.5 V core / 5.0 V VDDEXT). It operates from 3.0 V to 28 V supply across −40 °C to +150 °C junction temperature and targets body control modules requiring integrated actuation and communication.

For engineers reviewing the TLE9845QXXUMA1 datasheet, TLE9845QXXUMA1 pinout, TLE9845QXXUMA1 application, or TLE9845QXXUMA1 equivalent, key selection criteria include integrated LIN transceiver compliance, cyclic sense wake-up capability for sleep-mode battery monitoring, high-voltage analog input tolerance (up to 28 V), and AEC-Q100 qualification for under-hood use.

Technical Context

The TLE9845QXXUMA1 integrates a single-cycle 40 MHz Arm Cortex-M0 core with on-chip boot ROM, 48 KB Flash (including emulated 4 KB EEPROM), and 4 KB RAM. Its SCU-PM subsystem manages power sequencing, brownout detection, overtemperature shutdown, and short-circuit protection for all regulators and switches.

Timing and signal conditioning are handled by GPT12, Timer2/Timer21, and CCU6 for PWM generation, while the 10-bit ADC supports simultaneous sampling of 6 analog inputs plus 5 high-voltage monitor pins - all with post-processing capability via an integrated measurement unit.

Key Specifications

Pinout & Package

VQFN-48-31 package with wettable flank (LTI) and RoHS-compliant green finish; 48-pin quad flat no-lead with 0.5 mm pitch and exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller with integrated power switches and LIN applications.

Compared with TLF35584ESV33 and MC9S12VR64, the TLE9845QXXUMA1 uniquely combines Arm Cortex-M0 processing, LIN transceiver, high-side switching, and HV analog monitoring in one AEC-Q100 Grade 0 package - reducing total system cost and board area where integrated control is required.

Availability

TLE9845QXXUMA1 is available at Aetrix Electronics and suitable for body control modules, smart junction boxes, LED headlamp drivers, and seat control modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE9845QXXUMA1 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 security solutions, with global R&D and manufacturing infrastructure.

The TLE9845QXXUMA1 belongs to Infineon's TLE98xx family of automotive-qualified microcontrollers designed specifically for intelligent power actuation in body electronics - emphasizing integration, functional safety, and robustness in harsh environments.

FAQ

What LIN protocol versions does the TLE9845QXXUMA1 support?

The TLE9845QXXUMA1 integrates a LIN 2.2-compliant transceiver and supports LIN bootloader (LIN BSL) for firmware updates over the LIN bus. It does not support LIN 2.1 or LIN 2.0 exclusively - its hardware and firmware stack are validated for LIN 2.2 physical layer and protocol conformance, including sleep/wake-up frame handling and checksum calculation.

Can the high-side switches drive inductive loads like relays?

Yes - the two high-side switches (HSD1/HSD2) support inductive loads with built-in flyback path control and overcurrent detection. Each switch delivers ≥150 mA continuously and includes active short-circuit protection, thermal shutdown, and automatic restart after fault clearance - enabling direct relay coil driving without external freewheeling diodes.

Is the 4 KB emulated EEPROM wear-levelled and endurance-rated?

Yes - the 4 KB EEPROM is emulated in Flash memory using Infineon's proprietary wear-leveling algorithm. It guarantees ≥100,000 write/erase cycles and data retention of ≥10 years at 125 °C, validated per AEC-Q100 stress test requirements for nonvolatile parameter storage in automotive applications.

Does the TLE9845QXXUMA1 require an external crystal for operation?

No - the device includes an on-chip oscillator (OSC_HP) supporting both external crystal (1–20 MHz) and external clock input modes, but also operates from its internal low-precision RC oscillator for basic functionality. Crystal is optional and only required when ±1% frequency accuracy is needed for LIN timing or precise PWM generation.