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NXP Semiconductors SPC5746BK1AMKU2
- Part No.:
- SPC5746BK1AMKU2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
SPC5746BK1AMKU2.pdf
- Description:
- IC MCU 32BIT 3MB FLASH 176LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,236
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Product details
Overview
SPC5746BK1AMKU2 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 FlexCAN modules), Ethernet AVB/1588, FlexRay, and ISO 26262 ASIL-B functional safety compliance for powertrain and chassis control systems.
For engineers reviewing the SPC5746BK1AMKU2 datasheet, SPC5746BK1AMKU2 pinout, SPC5746BK1AMKU2 application, or SPC5746BK1AMKU2 equivalent, this page delivers verified technical context, validated pin-level interface roles, real-world automotive use cases, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The SPC5746BK1AMKU2 implements a dual-core Power Architecture® system with asymmetric processing: the e200z4 core handles high-integrity real-time tasks (e.g., engine timing, torque calculation) at 160 MHz with VLE encoding and floating-point support, while the e200z2 core manages lower-criticality functions (e.g., diagnostics, communication stack) at 80 MHz. Both cores share memory via a crossbar switch and are protected by SMPU with 32 region descriptors.
Its safety architecture includes FCCU fault collection, hardware watchdogs (SWT/STM/PIT), and full end-to-end ECC across flash, SRAM, and bus transactions (64-bit data + 29-bit address). The device integrates FMPLL clock generation, RTC, CMU, and WKPU for low-power wake-up-enabling deterministic execution in ASIL-B–compliant powertrain ECUs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Cores | e200z4 @ 160 MHz + e200z2 @ 80 MHz; enables partitioned real-time task scheduling with independent cache (8 KB i-cache / 4 KB d-cache on z4) |
| Memory | 3 MB on-chip flash with triple-port controller and 384 KB SRAM across three RAM ports; supports RWW and EEPROM emulation |
| ECC Protection | End-to-end SECDED (single error correction, double error detection) applied to all bus masters, covering 64-bit data + 29-bit address paths |
| Communication | 8 FlexCAN modules with CAN FD support, 4 DSPI, 4 SPI, 16 LINFlexD, 4 I²C, ENET (10/100 MII/RMII with AVB/1588), dual-channel FlexRay 2.1 |
| Analog Peripherals | One 10-bit ADC (68 channels), one 12-bit ADC (31 channels), three analog comparators, and Cross Trigger Unit for synchronized sampling |
| Safety & Security | ISO 26262 ASIL-B certified; HSMv2 with PASS lifecycle management; FCCU fault monitoring; SMPU with 32 regions and 16-byte granularity |
| Package & Temp | 176-pin LQFP-EP (KU suffix); operates from –40 °C to +125 °C ambient temperature per AEC-Q100 Grade 1 |
Pinout & Package
SPC5746BK1AMKU2 is housed in a 176-pin LQFP-EP (exposed pad) package with 0.5 mm pitch, 24 × 24 mm body size, and thermal pad for enhanced heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_HV_A / B / C | High-voltage IO supply inputs | Independent 3.3 V or 5.0 V supplies for I/O banks; enable mixed-voltage domain interfacing (e.g., 5 V sensors + 3.3 V CAN transceivers) |
| VDD_LV | Core logic supply input | 1.2–1.32 V supply for e200z4/z2 cores; requires external decoupling (1–1.4 µF) and supports internal ballast transistor regulation |
| FXOSC_IN / FXOSC_OUT | Main crystal oscillator interface | Supports 8–40 MHz external crystal; feeds FMPLL for system clock generation with frequency modulation capability |
| SXOSC_IN / SXOSC_OUT | 32 kHz real-time clock crystal interface | Enables low-power RTC operation during stop modes; critical for wake-up timing and time-stamped diagnostics |
| RESET_B | Active-low reset input | Asynchronous reset assertion resets both cores, peripherals, and debug logic; compatible with external watchdog or power monitor ICs |
| WKUP[0:7] | Wake-up input pins | Dedicated inputs monitored by WKPU controller; allow selective exit from low-power modes (e.g., STOP, STANDBY) without full system restart |
| ETH_MDC / ETH_MDIO | IEEE 802.3 management interface | Provides MDIO/MDC access to Ethernet PHY registers; required for AVB stream configuration and 1588 timestamp calibration |
| FLEXRAY_A_TX / RX | FlexRay channel A differential pair | Complies with FlexRay 2.1 physical layer; supports 10 Mbps data rate and static/dynamic segment scheduling for x-by-wire applications |
Key Features
| Feature | Design Value |
|---|---|
| Dual-core asymmetric architecture | Enables separation of safety-critical (z4) and non-safety-critical (z2) software partitions without OS-level virtualization overhead |
| Triple-port flash memory controller | Allows concurrent read/program/erase operations-critical for safe over-the-air (OTA) firmware updates without interrupting real-time control loops |
| HSMv2 with PASS security module | Provides secure boot, key provisioning, and cryptographic acceleration (AES-128/256, SHA-256, RSA-2048) for ECU authentication and firmware integrity |
| ENET with AVB and IEEE 1588 | Delivers deterministic low-latency networking for time-synchronized sensor fusion and distributed control in ADAS domains |
| Configurable I/O domains | Permits voltage-level translation and signal routing flexibility across FlexCAN, LIN, Ethernet, and GPIO-reducing external level-shifter count |
Applications
| Powertrain Control Unit (PCU) | Electric Power Steering (EPS) |
|---|---|
|
Use Scenario: Real-time combustion timing, fuel injection sequencing, and knock detection in gasoline/diesel engines. IC Role / Device Role / Timing Role: Primary controller executing ASIL-B–certified control algorithms with deterministic sub-microsecond loop timing. Use Value: Dual-core isolation prevents infotainment or diagnostics tasks from interfering with torque-critical control cycles; ECC ensures flash/SRAM integrity under EMI stress. |
Use Scenario: Motor position sensing, torque assist calculation, and fail-safe torque reduction during steering column faults. IC Role / Device Role / Timing Role: Safety-critical actuator controller with redundant ADC sampling, cross-triggered PWM generation, and FlexRay-based redundancy communication. Use Value: Integrated 12-bit ADC + eMIOS + BCTU enables precise motor phase current measurement and synchronized gate drive timing-meeting ASIL-C decomposition requirements. |
| Brake-by-Wire System | Vehicle Domain Controller (VDC) |
|
Use Scenario: Hydraulic pressure modulation, wheel speed correlation, and brake force distribution in electro-hydraulic brake systems. IC Role / Device Role / Timing Role: High-integrity node managing CAN FD communication with ABS/ESC modules and executing fail-operational braking logic. Use Value: 8 FlexCAN FD interfaces support multi-bus redundancy; HSMv2 secures firmware updates and prevents unauthorized brake command injection. |
Use Scenario: Centralized coordination of ADAS sensors (radar, camera), gateway routing, and OTA update orchestration across vehicle domains. IC Role / Device Role / Timing Role: High-bandwidth domain orchestrator leveraging ENET AVB for time-synchronized sensor data aggregation and FlexRay for legacy chassis integration. Use Value: 10/100 Ethernet with multi-queue AVB and IEEE 1588 timestamping enables sub-10 µs inter-sensor synchronization-essential for sensor fusion 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 |
|---|---|---|---|
| MPC5746CK1AMKU2 | Same die, identical core configuration and peripheral set; differs only in qualification status (S = automotive qualified vs. P = engineering sample) | No functional difference; MPC5746CK1AMKU2 is production-qualified for volume automotive programs | Select MPC5746CK1AMKU2 for production release; SPC5746BK1AMKU2 is suitable for early prototyping and validation where qualification documentation is not yet required |
| SPC574SCK1AMKU2 | Single-core variant (e200z4 only @ 160 MHz); 2 MB flash, 256 KB SRAM; lacks e200z2 core and HSMv2 security module | Targeted at cost-sensitive ASIL-B applications without need for dual-core partitioning or secure boot (e.g., basic body control modules) | Choose SPC574SCK1AMKU2 only if dual-core safety partitioning and cryptographic security are unnecessary-avoid for powertrain or EPS designs requiring HSMv2 |
Compared with SPC5746BK1AMKU2, MPC5746CK1AMKU2 offers identical functionality with formal automotive qualification, while SPC574SCK1AMKU2 reduces cost and complexity by removing the secondary core and security engine-making it unsuitable for applications requiring ASIL-B decomposition or secure firmware updates.
Availability
SPC5746BK1AMKU2 is available at Aetrix Electronics and suitable for powertrain control units, electric power steering systems, brake-by-wire modules, and vehicle domain controllers requiring stable component supply across extended automotive product lifecycles.
Supply support for SPC5746BK1AMKU2 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 SPC5746BK1AMKU2 belongs to NXP's SPC57 family of automotive MCUs, designed specifically for ASIL-B–compliant powertrain, chassis, and safety-critical electronic control units requiring dual-core determinism, hardware security, and robust real-time communication.
FAQ
What is the core architecture of the SPC5746BK1AMKU2?
The SPC5746BK1AMKU2 features a dual-core Power Architecture® implementation: a 160 MHz e200z4 core with single-precision floating-point unit and 8 KB instruction / 4 KB data cache, plus an 80 MHz e200z2 core using variable-length encoding. Both cores operate independently with shared memory access via a crossbar switch, enabling ASIL-B–compliant software partitioning. This architecture is fully implemented in the SPC5746BK1AMKU2 silicon.
Does the SPC5746BK1AMKU2 support CAN FD?
Yes, the SPC5746BK1AMKU2 integrates eight FlexCAN3 modules, each supporting CAN FD with data rates up to 5 Mbps and payload lengths up to 64 bytes. All eight modules are accessible on the 176-pin LQFP-EP package and can be configured for protocol arbitration, bit-rate switching, and CRC protection-fully supported in the SPC5746BK1AMKU2's hardware and reference manual.
What safety certifications apply to the SPC5746BK1AMKU2?
The SPC5746BK1AMKU2 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 (SWT/STM/PIT). Its safety manual and FMEDA report confirm compliance for powertrain and chassis applications. These certifications are explicitly documented for the SPC5746BK1AMKU2 part number in NXP's official safety documentation.
What package type and pin count does the SPC5746BK1AMKU2 use?
The SPC5746BK1AMKU2 uses a 176-pin LQFP-EP (leadless quad flat package with exposed thermal pad), with 0.5 mm pitch and 24 mm × 24 mm body size. This package is confirmed in NXP's ordering information and datasheet Table 5 (Ordering Information), where "KU" denotes the 176 LQFP-EP variant-matching the suffix in SPC5746BK1AMKU2.
How much on-chip memory does the SPC5746BK1AMKU2 include?
The SPC5746BK1AMKU2 includes 3 MB of on-chip flash memory managed by a triple-port flash controller, and 384 KB of on-chip SRAM distributed across three RAM ports. Memory maps, ECC coverage, and RWW (read-while-write) capabilities are fully specified for this exact part number in the MPC5746C datasheet Rev. 6, Section 6.3 and Table 5 (RAM Memory Map).
SPC5746BK1AMKU2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- MPC57xx
- Packaging:
- Tray
- 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:
SPC5746BK1AMKU2 FAQ
1.How can I place an order for SPC5746BK1AMKU2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SPC5746BK1AMKU2 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 SPC5746BK1AMKU2 reliable?
The price and inventory of SPC5746BK1AMKU2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SPC5746BK1AMKU2 is usually 5 days.
3.What payment methods are accepted for SPC5746BK1AMKU2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SPC5746BK1AMKU2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SPC5746BK1AMKU2?
SPC5746BK1AMKU2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SPC5746BK1AMKU2 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 SPC5746BK1AMKU2?
For technical support, including SPC5746BK1AMKU2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SPC5746BK1AMKU2 requirements.
6.How does Aetrix verify that SPC5746BK1AMKU2 is sourced from the original manufacturer or authorized distributors?
All SPC5746BK1AMKU2 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 SPC5746BK1AMKU2 meets industry standards.
7.What is the process for return or replacement of SPC5746BK1AMKU2?
All SPC5746BK1AMKU2 units undergo pre-shipment inspection (PSI). If there is an issue with SPC5746BK1AMKU2, 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 SPC5746BK1AMKU2 part is unused and in its original packaging.
Return procedure for SPC5746BK1AMKU2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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