NXP Semiconductors SPC5746CK1AMKU2R

Overview

SPC5746CK1AMKU2R 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 (8 channels), FlexRay (dual-channel), 10/100 Ethernet with AVB and IEEE 1588, and is certified to ISO 26262 ASIL-B for powertrain and chassis control applications.

For engineers reviewing the SPC5746CK1AMKU2R datasheet, SPC5746CK1AMKU2R pinout, SPC5746CK1AMKU2R application, or SPC5746CK1AMKU2R equivalent, this page delivers verified technical context, validated pin mapping for the 176-pin LQFP-EP package, real-world use cases in engine control and ADAS domain controllers, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The SPC5746CK1AMKU2R implements a tightly coupled dual-CPU architecture: the high-performance e200z4 core handles real-time safety-critical tasks (e.g., torque calculation, fault monitoring) while the e200z2 core manages communication stacks and diagnostics. Both cores share access to memory via a crossbar switch and are protected by a System Memory Protection Unit (SMPU) with 32 region descriptors.

Its clock system integrates FMPLL, multiple oscillators (FXOSC 8–40 MHz, SXOSC 32 kHz, FIRC 16 MHz, SIRC 128 kHz), and Clock Monitor Unit (CMU) for fail-safe timing. Peripheral subsystems include eight FlexCAN3 modules with CAN FD support, dual-channel FlexRay, ENET with multi-queue AVB, and two ADCs (10-bit and 12-bit) synchronized via Cross Trigger Unit to eMIOS or PIT timers.

Key Specifications

Pinout & Package

SPC5746CK1AMKU2R is housed in a 176-pin LQFP-EP (exposed thermal pad) package, optimized for automotive PCB layouts requiring mechanical robustness and thermal dissipation under extended temperature operation. Pin assignment follows NXP's standardized MPC5746C signal multiplexing scheme, with dedicated domains for FlexCAN, LIN, Ethernet, and general-purpose I/O.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5744C, SPC5746CK1AMKU2R adds FlexRay, ENET, and 1 MB extra flash-critical for AUTOSAR Adaptive integration. Against SPC5777MK1MMY2, it trades quad-core performance and PCIe for lower cost, power, and qualification maturity in production powertrain systems.

Availability

SPC5746CK1AMKU2R is available at Aetrix Electronics and suitable for engine control units, brake-by-wire systems, ADAS domain controllers, and vehicle gateway modules requiring stable component supply across automotive production lifecycles.

Supply support for SPC5746CK1AMKU2R 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 embedded security.

The SPC5746CK1AMKU2R belongs to NXP's SPC57 family of automotive MCUs, designed specifically for ASIL-B–compliant powertrain, chassis, and ADAS applications demanding high reliability, real-time determinism, and hardware-enforced security.

FAQ

What is the maximum operating frequency of each CPU core in the SPC5746CK1AMKU2R?

The SPC5746CK1AMKU2R integrates two Power Architecture cores: the e200z4 core operates at up to 160 MHz, and the e200z2 core runs at up to 80 MHz. Both support Variable Length Encoding (VLE) to reduce code footprint. These frequencies are guaranteed across the full –40°C to +125°C ambient temperature range per the datasheet's recommended operating conditions.

Does the SPC5746CK1AMKU2R support CAN FD, and how many channels are available?

Yes, the SPC5746CK1AMKU2R supports CAN FD across all eight FlexCAN3 modules (FlexCAN0 through FlexCAN7). Each channel is individually configurable for classic CAN or CAN FD operation with bit rates up to 5 Mbps in FD mode, as confirmed in the peripheral operating requirements section of the Rev. 6 datasheet.

What package type and pin count does the SPC5746CK1AMKU2R use?

The SPC5746CK1AMKU2R uses a 176-pin LQFP-EP (lead-free, exposed pad) package. This is explicitly defined in the ordering information section of the MPC5746C datasheet (Rev. 6, Section 3.2), where "KU" denotes the 176 LQFP-EP variant, and the "2" suffix indicates tape-and-reel packaging.

Is the SPC5746CK1AMKU2R qualified for automotive applications, and what safety standard does it meet?

Yes, the SPC5746CK1AMKU2R is automotive-qualified (indicated by "S" in its part number prefix) and certified to ISO 26262 ASIL-B for specific safety-related functions. Its hardware features-including end-to-end ECC, SMPU, FCCU, and HSMv2-are architected to support ASIL-B decomposition in production powertrain and chassis systems.

What is the role of the Hardware Security Module (HSMv2) in the SPC5746CK1AMKU2R?

The HSMv2 in the SPC5746CK1AMKU2R provides dedicated cryptographic services including AES-128/256, SHA-256, and RSA key generation, enabling secure boot, encrypted firmware updates, and TLS offload. It operates independently from the application cores and enforces strict life-cycle state transitions via the Password and Device Security (PASS) module.