NXP Semiconductors SPC5746CSK1MMH6R

Overview

SPC5746CSK1MMH6R 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 (10/100 with AVB, IEEE 1588), and dual-channel FlexRay - designed for ASIL-B safety-critical powertrain and chassis control applications.

For engineers reviewing the SPC5746CSK1MMH6R datasheet, SPC5746CSK1MMH6R pinout, SPC5746CSK1MMH6R application, or SPC5746CSK1MMH6R equivalent, key selection considerations include dual-core deterministic timing, hardware security for secure boot and key management, functional safety compliance (ISO 26262 ASIL-B), and support for high-bandwidth communication interfaces including FlexRay and multi-queue Ethernet.

Technical Context

The SPC5746CSK1MMH6R 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 debug units. 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, Clock Monitor Unit (CMU), Real Time Counter (RTC), System Timer Modules (STM), and Fault Collection and Control Unit (FCCU). The device integrates Boot Assist Flash (BAF) for serial in-system programming and Nexus Class 3+ debug support on both cores.

Key Specifications

Pinout & Package

SPC5746CSK1MMH6R is packaged in a 256-pin MAPBGA (package code MJ), 14 mm × 14 mm, 0.8 mm pitch, RoHS-compliant, with exposed thermal pad. Pin functions are defined per signal multiplexing group (e.g., SIUL2 pads support GPIO, LIN, CAN, FlexRay, Ethernet PHY interface, and ADC inputs).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5748G and SPC5777M, the SPC5746CSK1MMH6R uniquely balances dual-core determinism, FlexRay + CAN FD + Ethernet convergence, and ASIL-B certification in a 256 BGA footprint - making it optimal for cost-sensitive, safety-critical chassis and powertrain ECUs where FlexRay remains mandatory.

Availability

SPC5746CSK1MMH6R is available at Aetrix Electronics and suitable for automotive powertrain control, chassis domain controllers, and vehicle gateway modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 Grade 1 qualification.

Supply support for SPC5746CSK1MMH6R 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 SPC5746CSK1MMH6R belongs to NXP's SPC57x automotive MCU family, engineered specifically for ASIL-B safety-critical applications in powertrain, chassis, and body control - emphasizing deterministic real-time performance, hardware security, and multi-protocol networking.

FAQ

What is the maximum operating frequency of the SPC5746CSK1MMH6R's primary CPU core?

The SPC5746CSK1MMH6R features a 160 MHz e200z4 core as its primary CPU, confirmed in the official NXP datasheet Rev. 6 (November 2018), Table 1 "MPC5746C Family Comparison". This frequency is achievable under full characterization at –40 °C to +125 °C ambient temperature with appropriate voltage regulation and thermal management. The secondary e200z2 core operates at 80 MHz.

Does the SPC5746CSK1MMH6R support CAN FD, and how many CAN FD interfaces does it provide?

Yes, the SPC5746CSK1MMH6R supports CAN FD across all eight FlexCAN3 modules, as explicitly stated in the "Communication" section of the datasheet and verified in Table 1 ("MPC5746C Family Comparison"). Each FlexCAN module is optionally configurable for CAN FD operation, enabling data rates up to 5 Mbit/s and payloads up to 64 bytes - essential for high-bandwidth automotive networking.

What package type and pin count does the SPC5746CSK1MMH6R use?

The SPC5746CSK1MMH6R uses a 256-pin MAPBGA package (code MJ), measuring 14 mm × 14 mm with 0.8 mm pitch and an exposed thermal pad. This is confirmed in Section 3.2 "Ordering Information" and Table 1 of the NXP MPC5746C datasheet Rev. 6, which lists "MJ = 256 MAPBGA" as the package code for this part number variant.

Is the SPC5746CSK1MMH6R qualified for automotive applications, and what safety standard does it meet?

Yes, the SPC5746CSK1MMH6R is automotive-qualified (AEC-Q100 Grade 1) and certified to ISO 26262 ASIL-B for functional safety. This is documented in the "Functional Safety" section of the datasheet and reinforced in Table 1, where "Safety level" is specified as "Specific functions ASIL-B certifiable". The device includes dedicated hardware (FCCU, SMPU, ECC, lockstep-capable peripherals) to support ASIL-B decomposition.

What is the role of the Hardware Security Module (HSMv2) in the SPC5746CSK1MMH6R?

The HSMv2 in the SPC5746CSK1MMH6R provides dedicated cryptographic acceleration (AES-128/256, SHA-256, RSA-2048), secure key storage, and secure boot enforcement. As described in the "Security" section of the datasheet, it supports EVITA Medium security profiles and enables secure over-the-air (OTA) updates, firmware authentication, and lifecycle management via the Password and Device Security (PASS) module - all without burdening the main application cores.