NXP Semiconductors SPC5746BSK1VKU2

Overview

SPC5746BSK1VKU2 from NXP Semiconductors is a dual-core automotive microcontroller featuring a 160 MHz e200z4 CPU and an 80 MHz e200z2 CPU, 3 MB on-chip flash, 384 KB SRAM with end-to-end ECC, and integrated HSMv2 security module. It supports ISO 26262 ASIL-B functional safety and targets engine control units (ECUs), transmission controllers, and battery management systems in 125°C ambient environments.

For engineers reviewing the SPC5746BSK1VKU2 datasheet, SPC5746BSK1VKU2 pinout, SPC5746BSK1VKU2 application, or SPC5746BSK1VKU2 equivalent, key selection criteria include dual-core deterministic timing, CAN FD + FlexRay + Ethernet AVB connectivity, hardware security for secure boot and key management, and qualification for automotive AEC-Q100 Grade 0 (–40°C to +125°C).

Technical Context

The SPC5746BSK1VKU2 implements a crossbar switch architecture enabling concurrent access to flash, SRAM, and peripherals by multiple bus masters-including both e200z4 and e200z2 cores, eDMA, and ENET. Its memory subsystem includes triple-ported 64-bit flash controller with three page buffers and SMPU with 32 region descriptors for fine-grained memory protection.

Timing and safety are enforced via FMPLL with frequency modulation, RTC, 16 PITs, two STM modules, FCCU fault collection, and CMU clock monitoring. All analog resources-including dual ADCs (10-bit and 12-bit), three comparators, and BCTU-are synchronized via Cross Trigger Unit for deterministic sensor acquisition in closed-loop control.

Key Specifications

Pinout & Package

SPC5746BSK1VKU2 is housed in a 176-pin LQFP-EP package (package code KU) with exposed thermal pad, optimized for automotive PCB thermal management and EMI resilience. Pin functions are multiplexed across 178 GPIOs, supporting configurable I/O domains for CAN, LIN, Ethernet, and general-purpose use.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core automotive microcontroller applications.

Compared with MPC5746C and SPC574Sxx, the SPC5746BSK1VKU2 uniquely combines HSMv2, 3 MB flash, dual FlexRay channels, and full 8-CAN FD support-making it the only option qualified for high-integrity, security-enforced automotive control nodes requiring simultaneous real-time control and secure communication.

Availability

SPC5746BSK1VKU2 is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, and battery management systems requiring stable component supply across extended automotive lifecycles.

Supply support for SPC5746BSK1VKU2 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in functional safety and automotive-grade microcontrollers.

The SPC5746BSK1VKU2 belongs to NXP's SPC57 family of automotive MCUs, designed specifically for ASIL-B–compliant powertrain and chassis control applications demanding high reliability, security, and real-time performance.

FAQ

What is the operating temperature range for the SPC5746BSK1VKU2?

The SPC5746BSK1VKU2 is qualified for automotive Grade 0 operation, supporting ambient temperatures from –40°C to +125°C. This rating is validated per AEC-Q100 and applies to all core, analog, and communication peripherals under specified voltage and load conditions. The device maintains full functionality-including ECC, clock monitoring, and safety mechanisms-across this range. Junction temperature may reach 150°C under bias, and thermal design must account for θJA of the 176 LQFP-EP package.

Does the SPC5746BSK1VKU2 support CAN FD, and how many channels are available?

Yes, the SPC5746BSK1VKU2 supports CAN FD on all eight FlexCAN3 modules, each configurable for classical CAN or CAN FD operation up to 5 Mbps. These channels are fully independent, with dedicated message RAM, filtering, and error counters. CAN FD frames are processed in hardware without CPU intervention, enabling deterministic handling of high-bandwidth diagnostic and control messages in modern automotive networks.

How is functional safety implemented in the SPC5746BSK1VKU2?

The SPC5746BSK1VKU2 achieves ISO 26262 ASIL-B compliance through integrated hardware safety mechanisms: FCCU collects faults from memory, clocks, and peripherals; SMPU enforces memory access boundaries; end-to-end ECC detects and corrects memory errors; and STCU performs user-configurable MBIST. These features are documented in NXP's safety manual and supported by certified safety libraries. The SPC5746BSK1VKU2 itself is not ASIL-D capable, but its safety mechanisms enable ASIL-B system-level certification.

What security features does the SPC5746BSK1VKU2 include beyond HSMv2?

In addition to HSMv2, the SPC5746BSK1VKU2 integrates Password and Device Security (PASS) for secure boot enforcement, debug lockdown, and lifecycle state management (e.g., secure manufacturing, field update, decommissioning). It also includes register protection, memory locking, and Nexus Class 3+ debug authentication. All security primitives-including AES, SHA, and RSA-are hardware-accelerated and isolated from the main CPU execution environment to prevent side-channel leakage.

Is the SPC5746BSK1VKU2 pin-compatible with other members of the SPC5746 family?

No, the SPC5746BSK1VKU2 is not pin-compatible with other SPC5746 variants due to package-specific pin mapping. While it shares the 176 LQFP-EP footprint (KU code) with SPC5746C-KU devices, differences in peripheral enablement, power domain routing, and security feature activation mean that direct PCB replacement requires validation of voltage rail assignments, clock tree connections, and boot configuration pin states. Always consult the specific device's pinout table and schematic checklist before substitution.