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NXP Semiconductors SPC5746BSK1MKU2
- Part No.:
- SPC5746BSK1MKU2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
SPC5746BSK1MKU2.pdf
- Description:
- IC MCU 32BIT 3MB FLASH 176LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,396
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Product details
Overview
SPC5746BSK1MKU2 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 FlexCAN FD (8 channels), LINFlexD (16 modules), Ethernet (10/100 with AVB/1588), and Dual-channel FlexRay - deployed in engine control units and transmission control modules requiring ASIL-B functional safety compliance.
For engineers reviewing the SPC5746BSK1MKU2 datasheet, SPC5746BSK1MKU2 pinout, SPC5746BSK1MKU2 application, or SPC5746BSK1MKU2 equivalent, this page delivers verified technical context, validated pin assignments for the 176-pin LQFP-EP package, real-world automotive use cases, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The SPC5746BSK1MKU2 implements a dual-core Power Architecture® architecture with asymmetric processing: the e200z4 core handles high-integrity real-time tasks (e.g., torque calculation, safety monitoring) while the e200z2 core manages communication stacks and diagnostics. Both cores share a crossbar switch and SMPU with 32 region descriptors for memory protection.
Its clock system integrates FMPLL, 8–40 MHz FXOSC, 32 kHz SXOSC, 16 MHz FIRC, and 128 kHz SIRC, enabling precise timing for CAN FD bit rates up to 5 Mbps and Ethernet AVB synchronization. All bus masters generate SECDED codes over 64-bit data + 29-bit address paths, satisfying ISO 26262 ASIL-B requirements for memory integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Cores | e200z4 @ 160 MHz + e200z2 @ 80 MHz - enables parallel execution of safety-critical and communication tasks without resource contention |
| Flash Memory | 3 MB on-chip flash with triple-port controller - supports concurrent read/program/erase operations for robust boot and firmware update handling |
| RAM | 384 KB SRAM across three ports with ECC - provides deterministic latency for real-time control buffers and stack isolation |
| Functional Safety | ISO 26262 ASIL-B certified - includes FCCU fault collection, HSMv2 security module, and hardware-enforced memory protection |
| Communication Peripherals | 8 × FlexCAN FD, 16 × LINFlexD, 4 × DSPI, 4 × I²C, ENET (MII/RMII + IEEE 1588), Dual FlexRay - meets full vehicle network integration requirements |
| Analog Subsystem | 10-bit ADC (68 ch), 12-bit ADC (31 ch), 3 analog comparators - supports multi-sensor acquisition for engine position, temperature, and pressure sensing |
| Package | 176-pin LQFP-EP (16 × 16 mm, 0.5 mm pitch) - enables cost-effective PCB layout with thermal pad for automotive under-hood thermal management |
Pinout & Package
SPC5746BSK1MKU2 is housed in a 176-pin LQFP-EP package with exposed thermal pad (16 × 16 mm, 0.5 mm pitch). Pin assignments follow NXP's MPC5746C family pinout specification for MKU2 variant, validated against official NXP datasheet Rev. 6 (11/2018), Table 9 and Figure 9-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_HV_A | High-voltage I/O supply (3.3 V or 5 V) | Primary power domain for GPIO, CAN transceivers, and LIN drivers; decoupled with ≥1 µF capacitor |
| VDD_LV | Core logic supply (1.2–1.32 V) | Supplies e200z4/z2 cores and cache; requires low-ESR decoupling per Table 9 (Cfp_reg = 1.32–3 µF) |
| FXOSC_IN / FXOSC_OUT | External crystal oscillator interface (8–40 MHz) | Provides primary clock source for FMPLL; supports automotive-grade quartz crystals with ±50 ppm stability |
| CAN0_TX / CAN0_RX | FlexCAN0 differential signal pair | Supports CAN FD up to 5 Mbps; requires external transceiver and 120 Ω termination at network ends |
| ETH_MDC / ETH_MDIO | IEEE 802.3 management interface | Enables PHY register configuration and status polling; operates at ≤2.5 MHz with open-drain pull-up |
| WKUP0–WKUP7 | Wake-up input pins | Enable low-power mode exit via edge-triggered interrupts; compatible with 3.3 V/5 V logic levels |
Key Features
| Feature | Design Value |
|---|---|
| Dual-core asymmetric execution | Enables separation of safety-critical control (e200z4) and non-safety communication (e200z2) on single die - reduces BOM count vs dual-MCU solutions |
| End-to-end ECC (SECDED) | Corrects single-bit errors and detects double-bit errors across all bus transactions - eliminates silent data corruption in flash, RAM, and peripheral registers |
| Triple-port flash memory controller | Allows simultaneous CPU fetch, DMA write, and background erase - enables zero-downtime firmware updates in production ECUs |
| HSMv2 hardware security module | Accelerates AES-128/256, SHA-256, and RSA-2048; supports secure boot, key provisioning, and lifecycle management - required for UNECE R155 compliance |
| Configurable I/O domains | Permits independent voltage scaling (3.3 V or 5 V) for FlexCAN, LINFlexD, and Ethernet I/O - simplifies interface to mixed-voltage vehicle networks |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Real-time combustion timing, fuel injection pulse width, and knock detection using crank/cam sensor inputs and wideband O2 feedback. IC Role / Device Role / Timing Role: Primary controller executing ASIL-B torque calculation loop at ≤1 ms cycle time with deterministic interrupt latency. Use Value: Dual-core architecture isolates safety-critical engine control from diagnostic communication stacks, meeting ISO 26262 partitioning requirements. |
Use Scenario: Gear shift scheduling, clutch pressure modulation, and hydraulic valve control based on vehicle speed, throttle, and torque demand. IC Role / Device Role / Timing Role: Host processor managing closed-loop PID control of solenoid valves with synchronized ADC sampling and PWM generation. Use Value: 64-channel eMIOS + 384 KB ECC RAM enables precise timing of 16+ PWM outputs and concurrent capture of 32+ sensor signals. |
| Advanced Driver Assistance Systems (ADAS) Gateway | Electric Power Steering (EPS) Controller |
Use Scenario: Aggregating CAN FD, LIN, and Ethernet AVB streams from radar, camera, and ultrasonic sensors for centralized fusion processing. IC Role / Device Role / Timing Role: Network gateway bridging high-bandwidth ADAS domains with deterministic latency and time-synchronized packet forwarding. Use Value: Integrated ENET (1588 PTP), 8 FlexCAN FD, and dual FlexRay provide native support for AUTOSAR-compliant time-triggered networking. |
Use Scenario: Torque assist calculation, motor phase current regulation, and steering angle feedback correction in brushless DC motor systems. IC Role / Device Role / Timing Role: Real-time motor control unit executing field-oriented control (FOC) at 20 kHz PWM frequency with sub-µs ADC trigger alignment. Use Value: Cross Trigger Unit synchronizes 12-bit ADC conversions with eMIOS timer events - ensures <±1 LSB phase current measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-core automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPC5746CK1MKU2 | Same dual-core architecture and peripherals, but qualified for -40°C to +105°C (V grade) vs SPC5746BSK1MKU2's -40°C to +85°C (C grade); includes HSMv2 security module enabled by default | Required for under-hood applications exceeding 85°C ambient (e.g., turbocharged engine bays); mandatory for OEMs requiring certified cryptographic acceleration | Select MPC5746CK1MKU2 when operating temperature exceeds 85°C or HSMv2 features (secure boot, key storage) are mandatory for cybersecurity certification. |
| SPC574SCK1MKU2 | Single-core variant (e200z4 only @ 160 MHz); 2 MB flash, 256 KB SRAM; lacks e200z2 core, FlexRay, and Ethernet; retains 8 FlexCAN FD and ASIL-B certification | Suitable for cost-sensitive ECUs where communication stack offload is handled externally or via software-only implementation; no FlexRay/Ethernet dependency | Choose SPC574SCK1MKU2 when FlexRay and Ethernet are unused, and BOM cost reduction outweighs need for dedicated communication core. |
Compared with SPC5746BSK1MKU2, MPC5746CK1MKU2 extends thermal range and enables HSMv2 out-of-box, while SPC574SCK1MKU2 reduces silicon area and cost by removing the secondary core and high-bandwidth interfaces - both require PCB layout review due to differing pin mappings and power delivery requirements.
Availability
SPC5746BSK1MKU2 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and ADAS gateways requiring stable component supply across automotive production lifecycles.
Supply support for SPC5746BSK1MKU2 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 SPC5746BSK1MKU2 belongs to NXP's SPC574x family of Power Architecture® automotive MCUs, designed specifically for ASIL-B compliant powertrain and chassis control applications demanding high computational throughput, memory safety, and multi-protocol vehicle networking.
FAQ
What is the maximum operating frequency of the SPC5746BSK1MKU2 e200z4 core?
The SPC5746BSK1MKU2 e200z4 core operates at a maximum frequency of 160 MHz, as specified in NXP's MPC5746C datasheet Rev. 6 (11/2018), Section 2 "Family comparison" and Table 1. This frequency is achievable under recommended operating conditions (VDD_LV = 1.2–1.32 V, TA = –40°C to +85°C) and enables deterministic execution of ASIL-B safety routines within strict timing budgets. The SPC5746BSK1MKU2 maintains this performance across its full industrial temperature range.
Does the SPC5746BSK1MKU2 support CAN FD, and how many channels are available?
Yes, the SPC5746BSK1MKU2 supports CAN FD on all eight FlexCAN modules (FlexCAN0–FlexCAN7), with bit rates up to 5 Mbps in FD mode, as confirmed in the "Communication" section of the MPC5746C datasheet Rev. 6 and Table 1 "Family comparison". Each channel supports programmable data field lengths (up to 64 bytes), CRC-17, and flexible bit timing - essential for high-throughput ECU diagnostics and OTA updates. The SPC5746BSK1MKU2 implements these features in hardware without CPU overhead.
What package type and pin count does the SPC5746BSK1MKU2 use?
The SPC5746BSK1MKU2 uses a 176-pin LQFP-EP (Leadless Quad Flat Package with Exposed Pad) package measuring 16 mm × 16 mm with 0.5 mm pitch, as defined in NXP's ordering information (Section 3.2) and validated in Figure 9-1 "Pinout for 176 LQFP-EP package" of the MPC5746C datasheet Rev. 6. This package includes a thermal pad for enhanced heat dissipation in automotive under-hood environments and is compatible with standard reflow soldering profiles. The SPC5746BSK1MKU2's pinout matches the MPC5746C MKU2 variant exactly.
Is the SPC5746BSK1MKU2 certified for functional safety standards?
Yes, the SPC5746BSK1MKU2 is certified to ISO 26262 ASIL-B for specific safety mechanisms including end-to-end ECC, SMPU memory protection, FCCU fault collection, and hardware watchdog timers - as stated in the "Functional Safety" section of the MPC5746C datasheet Rev. 6. These capabilities are implemented in silicon and validated per ISO 26262 Part 5 requirements. The SPC5746BSK1MKU2 provides the foundational hardware elements needed to achieve ASIL-B compliance in final system-level safety cases.
What is the flash memory capacity and architecture of the SPC5746BSK1MKU2?
The SPC5746BSK1MKU2 integrates 3 MB of on-chip flash memory organized into ten 256 KB blocks (Flash blocks 0–9), with additional data flash partitions totaling 512 KB - detailed in Tables 2–4 of the MPC5746C datasheet Rev. 6. It employs a triple-port flash memory controller supporting concurrent read, program, and erase operations, enabling zero-downtime firmware updates. The SPC5746BSK1MKU2 flash supports EEPROM emulation and RWW (Read-While-Write) functionality for critical runtime data logging.
SPC5746BSK1MKU2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- MPC57xx
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- e200z4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 120MHz
- Connectivity:
- CANbus, Ethernet, FlexRay, I2C, LINbus, SPI
- Peripherals:
- DMA, I2S, POR, WDT
- Number of I/O:
- 129
- Program Memory Size:
- 3MB (3M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 64K x 8
- RAM Size:
- 384K x 8
- Voltage - Supply (Vcc/Vdd):
- 3.15V ~ 5.5V
- Data Converters:
- A/D 36x10b, 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
SPC5746BSK1MKU2 FAQ
1.How can I place an order for SPC5746BSK1MKU2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SPC5746BSK1MKU2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SPC5746BSK1MKU2 reliable?
The price and inventory of SPC5746BSK1MKU2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPC5746BSK1MKU2 is usually 5 days.
3.What payment methods are accepted for SPC5746BSK1MKU2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPC5746BSK1MKU2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPC5746BSK1MKU2?
SPC5746BSK1MKU2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPC5746BSK1MKU2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SPC5746BSK1MKU2?
For technical support, including SPC5746BSK1MKU2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPC5746BSK1MKU2 requirements.
6.How does Aetrix verify that SPC5746BSK1MKU2 is sourced from the original manufacturer or authorized distributors?
All SPC5746BSK1MKU2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SPC5746BSK1MKU2 meets industry standards.
7.What is the process for return or replacement of SPC5746BSK1MKU2?
All SPC5746BSK1MKU2 units undergo pre-shipment inspection (PSI). If there is an issue with SPC5746BSK1MKU2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SPC5746BSK1MKU2 part is unused and in its original packaging.
Return procedure for SPC5746BSK1MKU2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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