company blog about Infineon SAK-TC397XX-256F300S BD 32-Bit Single-Chip AURIX™ TC3 Automotive MCU

Infineon SAK-TC397XX-256F300S BD 32-Bit Single-Chip AURIX™ TC3 Automotive MCU

Shenzhen Mingjiada Electronics Co., Ltd. supplies/recycles the SAK-TC397XX-256F300S BD 32-bit single-chip AURIX™ TC3 automotive microcontroller, providing a high-performance single-chip solution for the next generation of automotive intelligence, electrification, and connectivity trends.

I. Product Positioning and Series Affiliation

The SAK-TC397XX-256F300S BD represents the second generation of the high-end 32-bit automotive-grade AURIX™ TC3xx series microcontrollers. Built upon a 40nm embedded flash process, it constitutes a high-performance single-chip solution specifically engineered to address the intelligent, electrified, and connected vehicle trends of the new generation. As one of the flagship products within the AURIX™ TC3 family, this chip balances extreme computational power, functional safety, and communication expansion capabilities. It perfectly meets the stringent requirements of automotive electronics for high reliability, high real-time performance, and high security, serving as the core computational power carrier for high-end in-vehicle control systems.

The SAK-TC397XX-256F300S BD utilises a PG-LFBGA-292 package. operates within a temperature range of -40°C to 125°C, supports single-voltage power supply at 3.3V/5V, and demonstrates excellent power consumption control (total system power consumption below 2W). It balances adaptability to harsh in-vehicle conditions with low-power requirements, while offering comprehensive software and hardware compatibility. This enables seamless migration from first-generation AURIX™ products, reducing development costs and cycles for automotive manufacturers and component suppliers.

II. Core Architecture and Computing Performance

The SAK-TC397XX-256F300S BD incorporates Infineon's proprietary 32-bit TriCore™ multi-core heterogeneous architecture, boasting industry-leading core computing power that completely overcomes the performance limitations of traditional automotive MCUs. It effortlessly handles demanding scenarios such as complex automotive algorithms, multi-task parallel processing, and real-time computation of massive data volumes.

- Multi-core Computing Configuration: The SAK-TC397XX-256F300S BD integrates six TriCore™ processing cores operating at up to 300MHz, complemented by four dedicated verification cores. This delivers an aggregate computing power of 4000 DMIPS. All cores support both fixed-point and floating-point operations, efficiently handling both control tasks and data processing. This meets the computational demands of scenarios such as autonomous driving assistance, powertrain domain control, and chassis domain control.

- Massive Storage Capacity: The SAK-TC397XX-256F300S BD integrates 16MB of embedded flash memory with ECC error correction protection. It supports A/B partition swapping functionality, enabling secure and reliable OTA remote upgrades. - Integrated up to 6.9MB SRAM, also featuring ECC protection, ensures stable data storage and retrieval, providing ample space for complex in-vehicle programme execution and temporary data caching.

- Efficient Data Scheduling: The SAK-TC397XX-256F300S BD incorporates a 128-channel DMA controller, enabling interference-free data transfer between the core and peripherals. This significantly reduces core computational load, enhances overall system responsiveness and real-time performance, and adapts to scenarios involving synchronous multi-sensor data acquisition and parallel multi-channel signal processing in automotive applications.

III. Core Functional Features and Technical Advantages

Top-tier Functional Safety Compliance

The SAK-TC397XX-256F300S BD adheres strictly to ISO 26262 automotive functional safety standards and IEC 61508 industrial safety standards throughout its development lifecycle. It completes comprehensive safety design and verification processes, supporting the highest ASIL-D/SIL3 safety ratings, making it an ideal choice for safety-critical automotive systems. Multiple safety mechanisms are integrated within the chip, including core lockstep verification, memory ECC protection, peripheral redundancy design, and fault detection and diagnostic modules. These enable real-time monitoring of system operation, rapid fault localisation and response, elimination of safety hazards, and assurance of stable, reliable operation for in-vehicle systems.

Comprehensive automotive communication interfaces

Addressing automotive connectivity and multi-domain interconnection requirements, the SAK-TC397XX-256F300S BD integrates comprehensive automotive communication peripherals. These cover traditional vehicle buses, high-speed Ethernet, and dedicated sensor interfaces, enabling efficient data exchange between vehicle interiors/exteriors and across domains. It perfectly suits applications such as vehicle gateways, domain controllers, and intelligent sensing:

- High-speed communication: 1 x 1Gbit Ethernet interface supporting high-speed data transmission, V2X connectivity, and high-definition video streaming;

- In-vehicle buses: 12 x CAN FD, 2 x FlexRay, 12 x ASCLIN, 6 x QSPI, 2 x I²C for traditional control system signal exchange;

- Dedicated Interfaces: 25x SENT, 4x PSI5, 1x PSI5S, 2x HSSL, 4x MSC, 1x eMMC/SDIOT, 1x I²S emulation interface for direct connectivity with vehicle sensors, actuators, and storage devices.

Comprehensive Security and Peripheral Support

The SAK-TC397XX-256F300S BD integrates an EVITA Full-grade HSM hardware security module, supporting encryption algorithms such as ECC256 and SHA2. This enables in-vehicle data encryption, identity authentication, secure boot, and other functions to counteract in-vehicle network attacks, safeguarding connected vehicle and onboard data security. Additionally, it incorporates redundant timer modules (GTM, CCU6, GPT12) to fulfil precise timing, PWM output, and pulse capture requirements for applications including motor control, lighting control, and chassis actuation. The integrated multi-channel high-precision ADC enables real-time acquisition of in-vehicle analogue signals, providing accurate data support for system decision-making.

Software Ecosystem and Compatibility

The SAK-TC397XX-256F300S BD fully supports the AUTOSAR 4.2 standard and integrates with mainstream in-vehicle software development platforms. It offers comprehensive underlying drivers, software libraries, and development toolchains, significantly streamlining in-vehicle software development processes while enhancing code reuse and development efficiency. It also supports Software-Over-The-Air (SOTA) updates, enabling automotive manufacturers to iterate in-vehicle system functionality and address vulnerabilities without hardware disassembly, thereby reducing after-sales maintenance costs.

IV. Core Application Scenarios

Leveraging its high performance, security, and adaptability, the SAK-TC397XX-256F300S BD finds extensive application across all categories of automotive core control systems while also covering industrial safety-critical domains. It stands as the preferred chip for high-end intelligent control scenarios:

- Automotive powertrain domain control: direct injection/multi-point fuel injection systems for internal combustion engines, main inverters for hybrid/electric vehicles, battery management systems (BMS), DC-DC converters, automatic transmission control systems, etc.;

- Chassis and Safety Domains: Chassis domain controllers, braking systems, electric power steering, active suspension control, airbag control systems, electronic stability control systems, etc.;

- Intelligent Driving and Sensing: 24GHz/77GHz automotive radar systems, multi-sensor fusion, multi-functional in-vehicle cameras, autonomous driving assistance domain controllers, etc.;

- Body and Connectivity Domain: High-end body domain controllers, vehicle gateways, infotainment systems, V2X telematics terminals, wireless charging control systems, etc.;

- Industrial and Specialised Vehicles: Safety-critical equipment including industrial robots, servo drives, wind/solar inverters, commercial/agricultural vehicle control systems, and drone flight controllers.

V. Summary of Core Product Value

As the flagship offering within Infineon's AURIX™ TC3 series, the SAK-TC397XX-256F300S BD delivers multi-core high-performance computing, top-tier functional safety, comprehensive communication adaptability, and a robust software ecosystem. These core strengths address the computational bottlenecks, safety concerns, and compatibility challenges facing next-generation automotive electronics and industrial control systems. Whether for high-end control systems in traditional internal combustion engine vehicles or core domain controllers in new energy vehicles and intelligent connected vehicles, this chip delivers stable, efficient, and secure single-chip solutions. It serves as the core hardware foundation driving automotive intelligence and electrification upgrades, while also embodying Infineon's technological prowess in the automotive microcontroller domain.