Infineon Technologies TC397XA256F300SBDKXUMA1

Overview

TC397XA256F300SBDKXUMA1 from Infineon Technologies is a 32-bit AURIX™ TriCore™ microcontroller with six lockstep-capable TC1.6.2P CPU cores operating up to 300 MHz, 2.5 MB on-chip flash (1.6 MB PFLASH + 1 MB DFLASH), 768 KB LMU RAM, and integrated safety features including SMU, MTU, and ECC-protected memories. It targets automotive ADAS and powertrain control where functional safety (ISO 26262 ASIL-D) and real-time deterministic execution are required.

For engineers reviewing the TC397XA256F300SBDKXUMA1 datasheet, TC397XA256F300SBDKXUMA1 pinout, TC397XA256F300SBDKXUMA1 application, or TC397XA256F300SBDKXUMA1 equivalent, key selection criteria include dual-core lockstep configuration, HSM support for secure boot, E-Ray and CAN FD interface count, and LFBGA-292 package compatibility with automotive PCB layout constraints.

Technical Context

The TC397XA256F300SBDKXUMA1 implements a multi-core safety architecture with four of its six TriCore CPUs configured in lockstep pairs for ASIL-D compliance, while the remaining two operate independently for application tasks. Its memory subsystem includes ECC-protected 1.6 MB program flash, 1 MB data flash for EEPROM emulation, and 768 KB local memory unit (LMU) with configurable partitioning between code and data.

Peripheral integration includes three MCMCAN modules supporting CAN FD (up to 5 Mbps), two E-Ray controllers for time-triggered communication, six QSPI channels (master/slave, up to 50 Mbit/s), and eight ASCLIN interfaces with hardware LIN protocol acceleration. Clock generation relies on dual PLLs: SYS_PLL for core/system clocks and PER_PLL for peripheral domains.

Key Specifications

Pinout & Package

LFBGA-292 package with 15 × 15 mm body, 0.8 mm ball pitch, and standard automotive thermal and mechanical reliability specifications. Pin assignment follows the ADAS-optimized variant defined in Section 2.3 of the TC39x datasheet (V1.2, pp.277–375).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive safety microcontroller applications.

Compared with TC397XA256F300SBDKXUMA1, TC387 offers reduced interconnect bandwidth at lower cost for less demanding safety domains, while S32G274A provides higher general-purpose compute and networking flexibility at the expense of TriCore's real-time determinism and E-Ray integration.

Availability

TC397XA256F300SBDKXUMA1 is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire, radar processing, and zonal gateway applications requiring stable component supply, long-term automotive lifecycle support, and ASIL-D certification documentation.

Supply support for TC397XA256F300SBDKXUMA1 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 AG is a German semiconductor manufacturer specializing in power semiconductors, automotive MCUs, and security solutions, with global R&D and manufacturing infrastructure.

This device belongs to the AURIX™ TC3xx family-designed specifically for ISO 26262-compliant automotive safety applications including powertrain, chassis, and ADAS, emphasizing lockstep computing, memory safety, and time-triggered communication.

FAQ

What is the maximum ambient temperature rating for TC397XA256F300SBDKXUMA1?

The TC397XA256F300SBDKXUMA1 is qualified for operation from −40°C to +125°C ambient temperature per AEC-Q100 Grade 1 specification. This rating applies to all core logic, flash, and SRAM functions under specified voltage and load conditions, with derating applied only for sustained junction temperatures above 150°C as defined in Section 3.4 of the datasheet.

Does this MCU support secure boot with cryptographic verification?

Yes-when equipped with the optional Hardware Security Module (HSM), the TC397XA256F300SBDKXUMA1 supports secure boot using SHA-256 hash verification and AES-128 decryption of signed firmware images stored in protected PFLASH sectors. The HSM enforces immutable root-of-trust and prevents unauthorized code execution during reset sequence.

How many CAN FD interfaces does TC397XA256F300SBDKXUMA1 provide?

The TC397XA256F300SBDKXUMA1 integrates three MCMCAN modules, each supporting two CAN FD channels (totaling six physical CAN FD interfaces). Each channel operates up to 5 Mbps with flexible bit-rate switching, message filtering, and hardware timestamping aligned to the internal system timer.

Is external SDRAM required for typical automotive applications?

No-768 KB of on-chip LMU SRAM, plus per-core scratchpad memories (DSPR/PSPR) and caches, eliminates the need for external SDRAM in most ASIL-D applications. External memory interfaces (EBU) are provided but typically used only for specialized high-bandwidth peripherals like camera sensors or radar memory expansion.