NXP Semiconductors SPC5746CK1MKU6

Overview

SPC5746CK1MKU6 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 CAN FD across eight FlexCAN modules, Ethernet AVB/1588, dual-channel FlexRay, and ISO 26262 ASIL-B functional safety certification for powertrain and chassis control applications.

For engineers reviewing the SPC5746CK1MKU6 datasheet, SPC5746CK1MKU6 pinout, SPC5746CK1MKU6 application, or SPC5746CK1MKU6 equivalent, key selection criteria include dual-core deterministic timing, hardware security for secure boot and key management, ASIL-B compliance evidence, and 176-pin LQFP-EP package compatibility with automotive ECU thermal and layout constraints.

Technical Context

The SPC5746CK1MKU6 implements a crossbar switch architecture enabling concurrent access to flash, SRAM, and peripherals by both CPU cores and the 32-channel eDMA controller. Its memory subsystem includes triple-port flash memory 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. Analog subsystem integration includes dual ADCs (10-bit and 12-bit), three comparators, and cross-trigger synchronization between eMIOS timers and ADC conversions.

Key Specifications

Pinout & Package

SPC5746CK1MKU6 is housed in a 176-pin LQFP-EP (exposed pad) package with 0.5 mm pitch, optimized for automotive thermal dissipation and PCB routing density. Pin functions are multiplexed across SIUL2 I/O pads supporting configurable voltage domains for CAN, LIN, Ethernet, and general-purpose use.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5746C1MLQ100 and SPC574S24K1MKU6, the SPC5746CK1MKU6 delivers highest integration for safety-critical dual-domain systems-its 384 KB ECC SRAM, 8 FlexCAN FD channels, FlexRay, and full HSMv2 make it uniquely suited for next-generation E/E architectures requiring consolidated domain control.

Availability

SPC5746CK1MKU6 is available at Aetrix Electronics and suitable for automotive powertrain control units, ADAS domain controllers, electric vehicle battery management systems, and chassis control modules requiring stable component supply across extended product lifecycles.

Supply support for SPC5746CK1MKU6 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 applications, with deep expertise in Power Architecture® and functional safety design.

The SPC5746CK1MKU6 belongs to NXP's SPC57 family of automotive MCUs, engineered specifically for ASIL-B-certified powertrain, chassis, and safety-critical domain controllers demanding high compute density, hardware security, and multi-protocol communication.

FAQ

What is the maximum operating frequency of each CPU core in the SPC5746CK1MKU6?

The SPC5746CK1MKU6 integrates two independent CPU cores: the e200z4 core operates at up to 160 MHz, while the e200z2 core runs at up to 80 MHz. Both cores support Variable Length Encoding (VLE) to reduce code footprint. These frequencies are validated under −40°C to +125°C ambient conditions with appropriate voltage regulation and thermal management per the datasheet's recommended operating conditions.

Does the SPC5746CK1MKU6 support CAN FD, and how many channels are available?

Yes, the SPC5746CK1MKU6 supports CAN FD across all eight FlexCAN3 modules (FlexCAN0 through FlexCAN7). Each channel is independently configurable for classic CAN or CAN FD operation with bit rates up to 5 Mbps in FD mode. This capability is confirmed in the Family Comparison table and peripheral operating requirements section of the official MPC5746C datasheet Rev. 6.

What package type and pin count does the SPC5746CK1MKU6 use?

The SPC5746CK1MKU6 uses a 176-pin LQFP-EP (Leadless Quad Flat Package with Exposed Pad) package, denoted by the "KU" suffix in the part number. It features 0.5 mm pitch, RoHS compliance, and is rated for −40°C to +125°C ambient operation. This package is explicitly listed in Table 1 (Family Comparison) and Section 3.2 (Ordering Information) of the MPC5746C datasheet.

Is the SPC5746CK1MKU6 certified for ISO 26262 functional safety, and at what ASIL level?

Yes, the SPC5746CK1MKU6 is designed and documented to support ISO 26262 ASIL-B compliance. This includes hardware features such as end-to-end ECC, SMPU, FCCU, lockstep-capable timers, and safety manual documentation. The datasheet states "Specific functions ASIL-B certifiable," and NXP provides dedicated safety documentation (e.g., FMEDA reports, safety manuals) to support customer certification efforts.

What security features are implemented in the SPC5746CK1MKU6's Hardware Security Module (HSMv2)?

The SPC5746CK1MKU6 integrates HSMv2, which provides dedicated cryptographic acceleration for AES-128/256, SHA-256, RSA-2048, and ECC. It supports secure boot, key provisioning, secure firmware updates (via UDS), and lifecycle management through Password and Device Security (PASS). All operations occur in isolated secure memory, and HSMv2 is accessible only via defined secure communication channels-not directly by the application cores.