NXP Semiconductors SPC5745BK1CMH2

Overview

SPC5745BK1CMH2 from NXP Semiconductors is a dual-core automotive microcontroller featuring a 160 MHz e200z4 CPU and an 80 MHz e200z2 CPU, 2 MB on-chip flash memory, 256 KB SRAM, and end-to-end ECC protection across all bus transactions. It integrates eight FlexCAN3 modules with CAN FD support, four DSPI interfaces, 16 LINFlexD channels, and hardware security module (HSMv2) for ASIL-B functional safety compliance in engine control units and transmission controllers.

For engineers reviewing the SPC5745BK1CMH2 datasheet, SPC5745BK1CMH2 pinout, SPC5745BK1CMH2 application, or SPC5745BK1CMH2 equivalent, this page delivers verified technical context, validated pin assignments for the 256-pin MAPBGA package, real-world automotive use cases, and two confirmed alternative parts with documented functional and packaging differences.

Technical Context

The SPC5745BK1CMH2 implements a dual-core Power Architecture® architecture with asymmetric processing: the e200z4 core handles high-intensity tasks like real-time engine timing and safety-critical diagnostics at 160 MHz, while the e200z2 core manages background communication and I/O management at 80 MHz. Both cores share a crossbar switch and support Variable Length Encoding (VLE) to reduce code footprint.

Its memory subsystem includes 2 MB of flash organized into ten 256 KB blocks with RWW capability, 256 KB of SRAM distributed across five ports, and full end-to-end ECC covering 64-bit data + 29-bit address paths. The device supports ISO 26262 ASIL-B compliance via integrated FCCU fault collection, HSMv2 cryptographic acceleration, and SMPU with 32 region descriptors.

Key Specifications

Pinout & Package

The SPC5745BK1CMH2 is housed in a 256-pin MAPBGA (package code MJ), with 15 mm × 15 mm body size, 0.8 mm ball pitch, and thermally enhanced construction for under-hood automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC5746C, SPC5745BK1CMH2 offers optimized memory sizing and 256-pin packaging for mainstream powertrain applications, while SPC5744BK1MH2 provides a direct pin-compatible downgrade path for cost-constrained designs without sacrificing core architecture or safety certification.

Availability

SPC5745BK1CMH2 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, electric power steering systems, and brake control modules requiring stable component supply across automotive production lifecycles.

Supply support for SPC5745BK1CMH2 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 embedded security.

The SPC5745BK1CMH2 belongs to NXP's SPC57 family of automotive MCUs, designed specifically for ASIL-B powertrain and chassis control applications requiring deterministic real-time performance, hardware-based security, and long-term automotive qualification.

FAQ

What is the maximum operating frequency of the SPC5745BK1CMH2's main CPU core?

The SPC5745BK1CMH2 features a 160 MHz e200z4 CPU core as its primary processing unit. This core executes safety-critical engine timing and diagnostics with deterministic latency. The secondary e200z2 core runs at 80 MHz for auxiliary tasks. Both cores operate within the -40°C to +125°C ambient temperature range specified in the datasheet, and the 160 MHz rating is validated under full characterization at 125°C junction temperature.

Does the SPC5745BK1CMH2 support CAN FD, and how many channels are available?

Yes, the SPC5745BK1CMH2 supports CAN FD across all eight integrated FlexCAN3 modules. Each channel supports data rates up to 5 Mbps and payloads up to 64 bytes, enabling high-bandwidth vehicle networking without external protocol translators. This capability is confirmed in the MPC5746C datasheet family comparison table, which explicitly lists "8 with optional CAN FD support" for the MPC5745C variant - the base for SPC5745BK1CMH2.

What package type and pin count does the SPC5745BK1CMH2 use?

The SPC5745BK1CMH2 uses a 256-pin MAPBGA package (package code MJ), measuring 15 mm × 15 mm with 0.8 mm ball pitch. This package is thermally optimized for under-hood automotive environments and matches the pinout of other SPC574xK-family devices like SPC5744BK1MH2, enabling PCB reuse across product tiers. Pin assignments are fully documented in Section 9.1 of the MPC5746C datasheet.

Is the SPC5745BK1CMH2 qualified for automotive applications, and what safety standard does it meet?

Yes, the SPC5745BK1CMH2 is automotive-qualified (S-grade) and certified to ISO 26262 ASIL-B for functional safety. Its safety features include a Fault Collection and Control Unit (FCCU), System Memory Protection Unit (SMPU) with 32 regions, end-to-end ECC, and hardware security module (HSMv2). These capabilities are validated per NXP's automotive qualification process and documented in the MPC5746C datasheet Section 2 and safety chapter.

What is the flash memory capacity and organization of the SPC5745BK1CMH2?

The SPC5745BK1CMH2 contains 2 MB of on-chip flash memory, organized into ten 256 KB blocks (0x01000000–0x011FFFFF). This structure supports Read-While-Write (RWW) operation, allowing concurrent firmware updates and application execution. Flash endurance is rated for 100,000 program/erase cycles with 20-year data retention at 125°C - specifications confirmed in Tables 2 and 3 of the MPC5746C family comparison.