SPC5746CSK1AMKU6 - Dual-Core 3MB Flash MCU | NXP Semiconductors
MPN: SPC5746CSK1AMKU6 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.85 | $14.85 |
| 10 | $14.1 | $141.00 |
| 100 | $13.2 | $1,320.00 |
| 500 | $12.05 | $6,025.00 |
| 1,000 | $10.95 | $10,950.00 |
SPC5746CSK1AMKU6 Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program storage and SRAM for data), and a rich set of peripherals including timers, ADCs, communication interfaces, and safety/security modules. Automotive MCUs such as the SPC5746C are purpose-built variants that add hardware-implemented functional safety (ISO 26262) and security extensions, and they sit in the broader hierarchy of embedded microcontrollers -> microcontrollers -> integrated circuits -> semiconductors. The SPC5746C targets applications where deterministic real-time response and integrated safety architecture are mandatory, particularly zone ECUs in vehicle electrical architectures.
Key features of the SPC5746CSK1AMKU6 include dual e200 Power Architecture cores with one configured as a delayed lockstep check core for fault detection, 3 MB of on-chip Flash organized as 3M x 8, 384 KB of on-chip SRAM, a 5 V supply rail, and a 129-I/O LQFP-176 footprint with an exposed thermal pad. The device also integrates multiple analog-to-digital converter channels, an enhanced modular I/O subsystem, and on-chip hardware security module (HSM) for cryptographic acceleration and secure key storage.
From an architecture standpoint, the SPC5746C delivers hardware-level diagnostics through dual-core lockstep execution with built-in self-test, error correction on Flash and SRAM arrays, and a fault collection and control unit (FCCU) that aggregates failure indications from internal monitors and drives safe-state outputs. The 5 V I/O domain and 80/160 MHz core clock provide headroom for body-control and gateway workloads, while the LQFP-176 exposed-pad package supports thermal dissipation in harsh under-hood and cabin environments per AEC-Q100 Grade 1/2 qualifications.
Typical applications include central body control modules, automotive gateway ECUs, industrial PLC controllers, and zone controller nodes in service-oriented vehicle architectures. The integrated HSM and functional safety support specifically address secure boot and ASIL-B/D system requirements.
Designers should plan for a multi-rail decoupling network on the supply pins and provide a low-impedance ground return through the exposed pad. The 176-pin LQFP-176 footprint requires careful signal-integrity routing for high-speed communication peripherals such as FlexCAN and Ethernet.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives from the MPC5746C family, and practical design notes not collected in the manufacturer datasheet alone, including worked-out AEC-Q100 grade selection guidance.
Drop-in alternatives for SPC5746CSK1AMKU6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SPC5746CBK1AMKU6
✅ Drop-In📋 Reference alternative (not in catalog)
SPC5746CSK1AMKU6R
✅ Drop-In📋 Reference alternative (not in catalog)
SPC5746CSK1AMKU8
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SPC5746CSK1AMJR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SPC5746CSK1MMU6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SPC5746CSK1AMKU6 Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors |
| Series | MPC574xB/C/G family (MPC5746C) |
| Core Architecture | e200z2 (lockstep check) + e200z4 (performance) |
| Core Count | 2 (dual-core with lockstep) |
| Core Speed | 80 MHz / 160 MHz |
| Data Bus Width | 32-bit |
| Program Memory Size | 3 MB (3M x 8) Flash |
| RAM Size | 384 KB SRAM |
| Supply Voltage | 3 V to 5.5 V (5 V nominal) |
| I/O Pins | 129 |
| Package / Case | 176-LQFP Exposed Pad (HLQFP EP) |
| Supplier Device Package | 176-LQFP (24x24) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C (TA) per AEC-Q100 |
| Terminal Form | GULL WING |
| Functional Safety | Hardware security module, lockstep core, FCCU |
| RoHS Status | Compliant (per distributor listings) |
SPC5746CSK1AMKU6 Pin Configuration
| Pin 1 | [DATA_NEEDED] — Pin assignment requires the SPC5746C reference manual; consult the official datasheet for the exact 176-pin function table. |
Typical Applications
SPC5746CSK1AMKU6 is suitable for 6 applications: Automotive Gateway ECU, Central Body Control Module, Industrial PLC and Safety Controller, Zonal ECU in Service-Oriented Vehicle Architectures, Automotive Domain Controller (Powertrain/ADAS Periphery), Secure Network Nodes and HSM Companion Logic.
Automotive Gateway ECU
The SPC5746CSK1AMKU6 is well matched to central and zonal gateway ECUs because it provides dual-core lockstep execution (e200z2 + e200z4) at 80 MHz/160 MHz, which delivers the deterministic real-time throughput needed to route CAN-FD, FlexRay, and Ethernet traffic between vehicle domains. With 3 MB of Flash and 384 KB of SRAM, the part has the headroom to host AUTOSAR RTE plus a network management stack and routing tables. The 176-LQFP exposed-pad package supports thermal dissipation in cabin or under-hood enclosures, and the integrated FCCU plus hardware security module simplify ASIL-B functional-safety certification per ISO 26262.
Recommended
Central Body Control Module
Body control modules aggregate functions such as lighting, wipers, door locks, and access control, and the SPC5746CSK1AMKU6's 129 GPIOs plus eMIOS timer channels cover the typical BCM peripheral mix. The on-chip 12-bit ADC channels simplify analog inputs for lighting-current sense and supply rails, while 3 MB of Flash holds vectored BCM firmware plus diagnostics. AEC-Q100 qualification at -40 C to +125 C per the manufacturer datasheet supports under-hood and in-cabin placements. Engineers should leverage the lockstep core configuration to meet an ASIL-B safety target for body-domain functions.
Recommended
Industrial PLC and Safety Controller
Outside the automotive market, the SPC5746CSK1AMKU6 is well suited to industrial PLC and safety-controller applications where the dual-core lockstep pair supports IEC 61508 SIL-2/3 systems. The e200z4 performance core executes the application code while the e200z2 check core runs the same code with delayed timing, and the FCCU aggregates any faults detected by the lockstep comparator. Hardware security module support enables secure firmware update, meeting industrial cybersecurity requirements. The 5 V supply tolerance simplifies integration into legacy 24 V/5 V industrial rails.
Recommended
Zonal ECU in Service-Oriented Vehicle Architectures
Service-oriented vehicle architectures use zonal ECUs to consolidate I/O across physical vehicle zones; the SPC5746CSK1AMKU6 fits this role because its rich on-chip peripherals (CAN-FD, LIN, FlexRay, Ethernet, SPI, I2C) aggregate both legacy and high-speed communication buses. The 3 MB of Flash holds a hypervisor plus multiple guest operating environments, while 384 KB of SRAM supports higher-level operating-system data structures. Hardware security module support provides secure boot per ISO/SAE 21434, and the lockstep core pair simplifies ASIL-D decomposition in zone-architecture platforms.
Recommended
Automotive Domain Controller (Powertrain/ADAS Periphery)
In powertrain periphery and ADAS-sensor aggregation roles, the SPC5746CSK1AMKU6 provides the lockstep pair required to host an ASIL-B/D safety island. The 80 MHz/160 MHz core clock executes sensor-fusion preprocessing, while the on-chip 12-bit ADC channels digitize analog sensor inputs at high sample rates. Per the manufacturer datasheet, the device also supports cryptographic acceleration through the hardware security module, enabling secure boot and authenticated firmware update. Designers should plan PCB layout for thermal relief through the exposed pad when the device runs at the top of its operating envelope.
Recommended
Secure Network Nodes and HSM Companion Logic
A standalone automotive secure node benefits from the SPC5746CSK1AMKU6's hardware security module with secure key storage, true random-number generator, and cryptographic accelerators (AES, SHA, RSA, ECC). The 3 MB of Flash stores public-key infrastructure, TLS stacks, and secure bootloaders, while 384 KB of SRAM holds TLS session keys and message buffers. With CAN-FD and Ethernet MACs on-chip, the device drops straight into a secure CAN/Ethernet gateway between a vehicle's secure zone and untrusted exterior interfaces such as diagnostic ports.
Recommended
Recommended Products Summary
Engineering reference data for SPC5746CSK1AMKU6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SPC5746CBK1AMKU6 | SPC5746CSK1AMKU6R | SPC5746CSK1AMKU8 | SPC5746CSK1MMU6 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 176-LQFP Exposed Pad (24x24) | 176-LQFP Exposed Pad (24x24) - same | 176-LQFP Exposed Pad (24x24) - same | 176-LQFP Exposed Pad (24x24) - same | 176-LQFP Exposed Pad (24x24) - same |
| Core Architecture | e200z2 + e200z4 dual-core lockstep | e200z2 + e200z4 dual-core | e200z2 + e200z4 dual-core | e200z2 + e200z4 dual-core | e200z2 + e200z4 dual-core |
| Core Speed | 80 MHz / 160 MHz | 80 MHz / 160 MHz | 80 MHz / 160 MHz | 80 MHz / 160 MHz | 80 MHz / 160 MHz |
| Flash | 3 MB | 3 MB | 3 MB | 3 MB | 3 MB |
| SRAM | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB |
| Supply Voltage | 3 V to 5.5 V (5 V nom.) | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| I/O Pins | 129 | 129 | 129 | 129 | 129 |
| Functional Safety Module | FCCU + Hardware Security Module | FCCU + HSM | FCCU + HSM | FCCU + HSM | FCCU + HSM |
Key Differentiators
- 3 MB of Flash and 384 KB of on-chip SRAM in 176-LQFP exposed-pad package (vs SPC5744PFK1AMLQ9)
- Dual-core lockstep pair (e200z2 + e200z4) running at 80 MHz/160 MHz (vs SPC5741PK1AMLQ9)
- Integrated hardware security module (HSM) with secure key storage and crypto accelerator (vs SPC5746RK1MLU3)
Design Notes
The SPC5746CSK1AMKU6 requires multiple supply domains (core, I/O, ADC reference, HSM, Flash read). Place a 100 nF X7R ceramic decoupling capacitor as close as physically possible to each supply pin, with a 10 uF bulk tantalum or ceramic capacitor on each main supply rail. The 176-LQFP exposed-pad package ties the central thermal pad to the chip ground and must be soldered to a low-impedance ground plane to support high-current transients during Flash writes and lockstep core activity.
Route high-speed communication peripherals (CAN-FD, FlexRay, Ethernet MII/RMII, SPI) as length-matched differential pairs when possible and keep them at least 3 line widths away from switching supplies and oscillator traces. The JTAG and Nexus trace pins must be kept short to the debug header for stable real-time trace capture. Maintain a continuous reference ground plane beneath the exposed thermal pad so heat can dissipate and ground-return currents have a low-impedance path.
Do not substitute an SPC5746C variant from a different package (such as the 144-pin variants or the SPC5746RK1MLU3 in a non-LQFP-176 package) without re-validating the full PCB footprint. The SPC5746CSK1AMKU6's 176-LQFP EP package has 176 unique pin assignments per the NXP MPC5746C reference manual, and any package mismatch will require board rework. Always check the manufacturer datasheet errata before initial prototype bring-up to avoid chasing software issues that are known silicon errata.
Compliance Information
AEC-Q100 automotive qualification per NXP MPC574x family datasheet; RoHS compliance confirmed via distributor listings (DigiKey, Mouser, LCSC).
