NXP Semiconductors SPC5746CK1AMKU6R

Overview

SPC5746CK1AMKU6R 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 qualified for ASIL-B functional safety applications in powertrain and chassis control systems.

For engineers reviewing the SPC5746CK1AMKU6R datasheet, SPC5746CK1AMKU6R pinout, SPC5746CK1AMKU6R application, or SPC5746CK1AMKU6R equivalent, this page delivers verified technical context, validated pin assignments for the 176 LQFP-EP package, real-world use cases in engine management and ADAS domain controllers, and two confirmed alternative parts with documented interface and memory differences.

Technical Context

The SPC5746CK1AMKU6R implements a tightly coupled dual-core architecture where the e200z4 core handles high-integrity real-time tasks (e.g., torque calculation) and the e200z2 manages communication stacks and diagnostics. Both cores operate under SMPU-enforced memory protection with 32 region descriptors and 16-byte granularity.

Its crossbar switch enables concurrent access to flash, SRAM, and peripherals by multiple bus masters-including eDMA, INTC, and debug interfaces-while the FMPLL generates all system clocks from 8–40 MHz FXOSC, 32 kHz SXOSC, or internal FIRC/SIRC sources. All flash and SRAM transactions include SECDED ECC over 64-bit data + 29-bit address.

Key Specifications

Pinout & Package

SPC5746CK1AMKU6R is housed in a 176-pin LQFP-EP (exposed pad) package with 0.5 mm pitch, RoHS-compliant, and rated for –40°C to +125°C ambient operation. Pin assignments are validated per NXP Document Number MPC5746C Rev. 6, Section 9.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5746CK1AMKU6R, MPC5748G offers more memory but weaker security, while SPC58NG84C3 provides higher performance and ASIL-D certification at the cost of FlexRay compatibility and Power Architecture toolchain continuity.

Availability

SPC5746CK1AMKU6R is available at Aetrix Electronics and suitable for engine control units, brake-by-wire systems, ADAS domain controllers, and electric power steering modules requiring stable component supply across automotive production lifecycles.

Supply support for SPC5746CK1AMKU6R 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 focused on automotive, industrial, IoT, and communications markets, with deep expertise in secure microcontrollers and radar technology.

The SPC5746CK1AMKU6R belongs to NXP's SPC57 family of automotive MCUs, designed specifically for ASIL-B–compliant powertrain, chassis, and advanced driver assistance systems requiring dual-core determinism, functional safety, and hardware security.

FAQ

What is the maximum operating frequency of each CPU core in the SPC5746CK1AMKU6R?

The SPC5746CK1AMKU6R integrates two independent CPU cores: the e200z4 core runs at up to 160 MHz, and the e200z2 core operates at up to 80 MHz. Both cores support Variable Length Encoding (VLE) and execute instructions from the same 3 MB flash array. These frequencies are validated across the full –40°C to +125°C temperature range per NXP MPC5746C Rev. 6 datasheet Section 4.2.

Does the SPC5746CK1AMKU6R support CAN FD, and how many channels are available?

Yes, the SPC5746CK1AMKU6R supports CAN FD on 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 block diagram (Figure 1) and Table 1 of the MPC5746C datasheet Rev. 6.

What package type and pin count does the SPC5746CK1AMKU6R use?

The SPC5746CK1AMKU6R uses a 176-pin LQFP-EP (Low-Profile Quad Flat Package with Exposed Pad) package with 0.5 mm pitch. This package variant is explicitly identified by the "KU" suffix in the part number and is validated for thermal performance up to 125°C ambient per NXP's ordering information guide (Section 3.2, Rev. 6).

Is the SPC5746CK1AMKU6R qualified for functional safety standards?

Yes, the SPC5746CK1AMKU6R is certified to ISO 26262 ASIL-B for specific safety mechanisms including its SMPU, FCCU, STCU, and end-to-end ECC. The device includes dedicated hardware for fault collection, memory protection, and built-in self-test-documented in Sections 6.10 and 10 of the MPC5746C Rev. 6 datasheet. Full ASIL-D compliance requires system-level integration.

What is the role of the Hardware Security Module (HSMv2) in the SPC5746CK1AMKU6R?

The HSMv2 in the SPC5746CK1AMKU6R provides tamper-resistant cryptographic services including AES-128/256, SHA-256, RSA-2048, and secure key storage. It enforces device lifecycle states (e.g., secure boot, debug disable, production lockdown) via the Password and Device Security (PASS) engine. This implementation is detailed in Section 6.12 of the MPC5746C Rev. 6 datasheet.