NXP Semiconductors SPC5746CK1MMJ6R

Overview

SPC5746CK1MMJ6R 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 ASIL-B functional safety compliance and delivers deterministic real-time control for powertrain and chassis applications.

For engineers reviewing the SPC5746CK1MMJ6R datasheet, SPC5746CK1MMJ6R pinout, SPC5746CK1MMJ6R application, or SPC5746CK1MMJ6R equivalent, this page provides verified technical context, validated pin assignments for the 256-pin MAPBGA package, confirmed CAN FD and FlexRay interface capabilities, and direct alternative part comparisons grounded in NXP's official family documentation.

Technical Context

The SPC5746CK1MMJ6R implements a tightly coupled dual-core architecture where the e200z4 core handles high-performance control tasks and the e200z2 core manages background services and safety monitoring. Both cores operate under a unified memory map with SMPU-enforced memory protection across 32 regions and 16 semaphores for resource arbitration.

Its system-level timing relies on multiple independent clock sources: 8–40 MHz FXOSC, 32 kHz SXOSC, 16 MHz FIRC, and 128 kHz SIRC, all feeding into the FMPLL for precise frequency synthesis. The crossbar switch enables concurrent access to flash, SRAM, and peripherals by up to six bus masters-including eDMA, CPUs, and debug interfaces-without arbitration bottlenecks.

Key Specifications

Pinout & Package

The SPC5746CK1MMJ6R is housed in a 256-pin MAPBGA (package code MJ) with 1.0 mm ball pitch, designed for automotive-grade thermal and mechanical reliability. Pin assignments follow NXP's documented signal mapping for the MPC5746C family, with dedicated power domains (VDD_HV_A/B/C, VDD_LV), clock inputs (FXOSC, SXOSC, FIRC, SIRC), and peripheral-specific I/O banks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5746C-K1MJ6R and SPC574SCK1MMJ6R, the SPC5746CK1MMJ6R offers full peripheral complement including dual-channel FlexRay and 10/100 Ethernet-critical for centralized vehicle domain controllers-while maintaining identical dual-core performance, memory integrity, and functional safety architecture.

Availability

SPC5746CK1MMJ6R is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS domain controllers, electric vehicle battery management systems, and chassis control modules requiring stable component supply across extended product lifecycles.

Supply support for SPC5746CK1MMJ6R 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 functional safety and automotive-grade microcontrollers.

The SPC5746CK1MMJ6R belongs to NXP's SPC574x automotive MCU family, engineered specifically for ASIL-B real-time control in powertrain, chassis, and safety-critical vehicle subsystems with integrated security and robust mixed-signal capability.

FAQ

What is the maximum operating frequency of the SPC5746CK1MMJ6R's primary CPU core?

The SPC5746CK1MMJ6R features a 160 MHz Power Architecture e200z4 dual-issue 32-bit CPU as its primary core. This frequency is fully supported across the device's qualified temperature range of –40°C to +125°C ambient, with electrical specifications guaranteed per NXP's Rev. 6 datasheet. The secondary e200z2 core operates at 80 MHz. Both cores utilize Variable Length Encoding (VLE) to optimize code density and execution efficiency.

Does the SPC5746CK1MMJ6R support CAN FD, and how many CAN FD interfaces does it include?

Yes, the SPC5746CK1MMJ6R supports CAN FD across all eight FlexCAN modules (FlexCAN0 through FlexCAN7). Each module is individually configurable for classical CAN or CAN FD operation with bit rates up to 5 Mbps in FD mode. This capability is explicitly confirmed in Table 1 of the MPC5746C datasheet Rev. 6, which lists "8 with optional CAN FD support" for the MPC5746C variant.

What package type and pin count does the SPC5746CK1MMJ6R use?

The SPC5746CK1MMJ6R uses a 256-pin MAPBGA package (package code MJ) with 1.0 mm ball pitch. This is confirmed by the ordering information section of the MPC5746C datasheet Rev. 6, where "MJ" is defined as the 256 MAPBGA option, and by the pinout documentation specifying 178 GPIOs and dedicated power/ground balls consistent with that footprint.

Is the SPC5746CK1MMJ6R certified for functional safety standards?

Yes, the SPC5746CK1MMJ6R is designed to meet ISO 26262 ASIL-B requirements. Its safety features include a Fault Collection and Control Unit (FCCU), hardware memory protection (SMPU), end-to-end ECC, lockstep-capable dual-core architecture, and diagnostic software libraries provided by NXP. Certification evidence is documented in NXP's functional safety manual for the MPC5746C family.

What is the total on-chip flash and SRAM capacity of the SPC5746CK1MMJ6R?

The SPC5746CK1MMJ6R integrates 3 MB of on-chip flash memory and 384 KB of on-chip SRAM. These values are explicitly stated in the datasheet's "Features" section and confirmed in Table 1 ("MPC5746C Family Comparison"), where "Flash memory" is listed as "3 MB" and "RAM" as "384 KB" for the MPC5746C variant.