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NXP Semiconductors KW45Z41053AFPBT
- Part No.:
- KW45Z41053AFPBT
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
KW45Z41053AFPBT.pdf
- Description:
- K4W1 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,741
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Product details
Overview
KW45Z41053AFPBT from NXP Semiconductors is a secure, automotive-grade wireless MCU integrating an Arm Cortex-M33 core (96 MHz), 512 KB flash, 128 KB SRAM, TrustZone-M, EdgeLock™ Secure Enclave, and FlexCAN supporting CAN FD per ISO 11898-1 - deployed in Passive Entry/Passive Start (PEPS) and Wireless Battery Management Systems (WBMS).
For engineers reviewing the KW45Z41053AFPBT datasheet, KW45Z41053AFPBT pinout, KW45Z41053AFPBT application, or KW45Z41053AFPBT equivalent, key selection criteria include AEC-Q100 Grade 2 qualification, 6×6 mm 40-pin HVQFN wettable flank package, -40°C to +105°C ambient operation, secure boot with PRINCE encryption, and dual-domain power management enabling <3 μA power-down current with RTC active.
Technical Context
The KW45Z41053AFPBT implements a dual-core architecture: the main Arm Cortex-M33 application core runs at up to 96 MHz with 8 KB code cache, IEEE 754 FPU, DSP extensions, and MPU; a dedicated secure subsystem includes EdgeLock Secure Enclave with hardware AES-128/256, ECC P-256/384, SHA2-256/512, TRNG, and secure key storage. It excludes the Bluetooth LE radio core found in KW45B variants.
Its system-level security relies on TrustZone-M isolation, programmable Trusted Resource Domain Controller (TRDC), execute-only/read-only memory protection, and factory-programmed UUID and IEEE MAC subaddress. Safety features include SRAM ECC, dual watchdogs, clock loss detection, CRC calculator, and CAC-based frequency monitoring - all aligned with ASPICE and MISRA C:2012 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ 96 MHz - enables real-time deterministic control for automotive body electronics and industrial edge nodes. |
| Memory | 512 KB flash + 128 KB SRAM - sufficient for secure bootloader, CAN FD stack, and application firmware with OTA update capability. |
| Security | EdgeLock Secure Enclave + TrustZone-M - provides hardware-isolated cryptographic acceleration, secure key lifecycle management, and tamper-resistant debug. |
| CAN Interface | FlexCAN supporting CAN FD (ISO 11898-1) - delivers >5 Mbps effective data throughput for vehicle network diagnostics and WBMS telemetry. |
| Package | 40-pin HVQFN, 6 × 6 × 0.85 mm, 0.5 mm pitch, wettable flanks - supports automated optical inspection (AOI) and high-reliability solder joint formation in automotive PCB assembly. |
| Temperature Range | -40°C to +105°C ambient - qualified to AEC-Q100 Grade 2 for under-hood and cabin-mounted automotive modules. |
| Power Modes | <3 μA power-down with RTC + 32 KB SRAM retention - enables ultra-low-power wake-on-CAN/LIN for always-on vehicle access systems. |
Pinout & Package
Package: 40-pin HVQFN (SOT618-13(DD)), 6 mm × 6 mm × 0.85 mm, 0.5 mm pitch, wettable flanks - optimized for thermal dissipation and AOI-compatible solder joint inspection in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_IO_ABC | Digital I/O supply rail | 1.71–3.6 V input powering Ports A/B/C, Flash, and analog comparators - requires external decoupling per layout guidelines. |
| VDD_CORE | Core logic supply | 1.25–3.6 V input to LDO_CORE regulator - powers Cortex-M33 core, cache, and NVIC; supports safe-mode voltage (1.15 V) operation. |
| VDD_DCDC | DC/DC converter input | 1.8–3.6 V input enabling buck-mode efficiency; bypass mode supported for low-noise applications. |
| CAN_H / CAN_L | FlexCAN differential bus terminals | Direct connection to ISO 11898-1-compliant CAN FD transceiver - supports bit rates up to 5 Mbps with built-in loopback and self-test modes. |
| LPUART0_RX / LPUART0_TX | Low-power UART interface | Supports LIN 2.2 physical layer via software-controlled baud rate modulation - used for diagnostic communication in PEPS gateways. |
| RTC_CLKIN | Real-time clock oscillator input | Accepts 32.768 kHz crystal for precision timekeeping during deep power-down - critical for scheduled wake-up in battery-powered WBMS nodes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Validated for automotive ambient temperatures up to +105°C and junction temperatures up to +125°C - eliminates need for derating in engine bay proximity designs. |
| PRINCE flash encryption | On-the-fly XEX-mode decryption of encrypted 512 KB flash contents - prevents firmware reverse engineering and unauthorized cloning of secure access algorithms. |
| Smart Power Switch | Ultra-low leakage switch with <100 nA sleep current - enables autonomous wake-up from GPIO or internal timer without external PMIC, reducing BOM count in compact PEPS modules. |
| Secure Boot ROM | Immutable factory-programmed bootloader enforcing signature verification of application image - ensures only cryptographically signed firmware executes after reset. |
| TRDC-based resource partitioning | Hardware-enforced isolation between secure/non-secure domains for peripherals, memory, and interrupts - simplifies functional safety certification by eliminating software-mediated access control. |
Applications
| Secure Car Access | Wireless Battery Management |
|---|---|
Use Scenario: Vehicle entry system authenticating encrypted rolling codes from fob via low-latency CAN FD handshake while maintaining secure session keys. IC Role / Device Role / Timing Role: Main application controller executing secure authentication protocol, managing CAN FD message scheduling, and coordinating RF wake-up triggers. Use Value: Enables sub-100 ms door unlock latency with tamper-resistant key storage and runtime integrity checking - meeting OEM requirements for theft-deterrent response time. | Use Scenario: Distributed sensor node collecting cell voltage/temperature data and transmitting aggregated telemetry over CAN FD to central BMS controller. IC Role / Device Role / Timing Role: Real-time data aggregator with secure firmware update capability, CAN FD link-layer handling, and ultra-low-power sleep/wake cycles synchronized to cell monitoring intervals. Use Value: Achieves >10-year battery life using <3 μA power-down mode with RTC wake-up - eliminating service intervals in sealed EV battery packs. |
| Building Control Gateway | Industrial Process Automation |
Use Scenario: Smart HVAC gateway bridging legacy BACnet MS/TP fieldbus to modern IP networks while enforcing role-based access control. IC Role / Device Role / Timing Role: Secure protocol translator with FlexCAN for fieldbus interfacing, LPI2C for sensor expansion, and EdgeLock enclave for credential vaulting. Use Value: Provides hardware-rooted identity and encrypted audit logging - satisfying ISO/IEC 27001 requirements for building management cybersecurity compliance. | Use Scenario: Programmable logic controller (PLC) I/O module performing real-time motion control feedback via CAN FD while isolating safety-critical functions. IC Role / Device Role / Timing Role: Deterministic real-time controller with MPU-enforced memory protection, dual watchdog supervision, and SRAM ECC for fault-tolerant execution. Use Value: Meets SIL-2 requirements per IEC 61508 through hardware-based error detection and recovery - reducing validation effort for industrial automation deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S32K344WHT0MLFT | 120 MHz Arm Cortex-M7, 4 MB flash, S32G Ethernet support, no integrated CAN FD PHY - requires external transceiver. | Targeted at gateway-class automotive ECU with multi-network routing (CAN FD/Ethernet); higher performance but larger footprint and cost. | Select when Ethernet backbone integration or >1 MB flash is required; not drop-in due to different pinout, memory map, and peripheral set. |
| MIMXRT1176DVMAA | 1 GHz dual-core Arm Cortex-M7/M4, no AEC-Q100 qualification, no CAN FD controller, lacks EdgeLock-level secure enclave. | Designed for high-throughput industrial HMI and edge AI inference - unsuitable for automotive safety-critical CAN FD nodes. | Consider only for non-automotive industrial applications requiring raw compute; lacks required automotive qualification and CAN FD hardware acceleration. |
Compared with S32K344WHT0MLFT and MIMXRT1176DVMAA, the KW45Z41053AFPBT delivers optimal balance of AEC-Q100 Grade 2 compliance, integrated CAN FD controller, hardware-secured boot, and ultra-low-power operation in a compact 6×6 mm HVQFN - making it purpose-built for space-constrained, battery-sensitive automotive access and WBMS endpoints.
Availability
KW45Z41053AFPBT is available at Aetrix Electronics and suitable for automotive secure access systems, wireless battery management nodes, and industrial CAN FD edge controllers requiring stable component supply across extended product lifecycles.
Supply support for KW45Z41053AFPBT 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 Arm-based MCUs and automotive-grade security IP.
The KW45 product line was designed specifically for automotive and industrial wireless edge nodes requiring integrated CAN FD, hardware-enforced security, and AEC-Q100 qualification - targeting PEPS, WBMS, and smart gateway applications where functional safety and firmware integrity are mandatory.
FAQ
What is the maximum operating frequency of the KW45Z41053AFPBT application core?
The KW45Z41053AFPBT integrates an Arm Cortex-M33 core rated for up to 96 MHz operation. This frequency is achievable under specified voltage and temperature conditions (VDD_CORE ≥ 1.04 V, ambient ≤ +105°C) and enables deterministic real-time execution for automotive body control and industrial CAN FD messaging. The KW45Z41053AFPBT also includes an 8 KB instruction cache to sustain peak throughput without memory bottlenecks.
Does the KW45Z41053AFPBT include a Bluetooth Low Energy radio?
No, the KW45Z41053AFPBT is the MCU-only variant of the KW45 family and does not integrate a Bluetooth LE radio core. It is functionally identical to the KW45B41Z53AFPBT radio variant except for the absence of the dedicated CM3 radio core, 256 KB radio flash, and 88 KB radio SRAM. The KW45Z41053AFPBT retains full FlexCAN, security, and peripheral functionality for wired automotive and industrial applications.
What security features are implemented in the KW45Z41053AFPBT's EdgeLock Secure Enclave?
The KW45Z41053AFPBT's EdgeLock Secure Enclave provides hardware-accelerated AES-128/192/256, ECC P-192/224/256/384/521, SHA2-224/256/384/512, and Poly1305; secure key generation, storage, and management; true random number generation (TRNG) compliant with NIST SP 800-90A/B; and secure boot with immutable ROM loader. These features are accessible only via secure world calls, ensuring isolation from the application core - a capability confirmed in the KW45 reference manual (KW45B41ZRM) and data sheet Rev. 9.
Is the KW45Z41053AFPBT pin-compatible with other members of the KW45 family?
The KW45Z41053AFPBT uses a 40-pin HVQFN package (6×6 mm), while KW45 variants with 48-pin HVQFN (7×7 mm) - such as KW45Z41053AFTBT - have different pin counts and layouts. Within the 40-pin HVQFN group (e.g., KW45Z41052AFPBT, KW45Z41083AFPBT), pin assignments are consistent per the KW45 data sheet pinout table (Section 5.1), but memory size and CAN FD enablement differ. Therefore, the KW45Z41053AFPBT is pin-compatible only with other 40-pin KW45Z variants sharing the same mask set and package marking.
What is the minimum supply voltage required for the KW45Z41053AFPBT's DC/DC converter?
The KW45Z41053AFPBT's integrated DC/DC converter requires a minimum input voltage of 1.8 V on the VDD_DCDC pin, as specified in Table 8 (Voltage and current maximum ratings) and Table 10 (Voltage and current operating requirements) of the KW45 data sheet Rev. 9. Operation below this threshold may result in regulator instability or failure to enter buck mode - impacting core and radio domain power delivery. The KW45Z41053AFPBT supports bypass mode down to 1.25 V on VDD_LDO_CORE for low-noise applications.
KW45Z41053AFPBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 40-VFQFN Exposed Pad
- Series:
- Kinetis KW45Z
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit
- Speed:
- 96MHz
- Connectivity:
- CANbus, HMI, I2C, SPI, UART/USART
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 22
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 14x16b SAR
- Oscillator Type:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
KW45Z41053AFPBT FAQ
1.How can I place an order for KW45Z41053AFPBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45Z41053AFPBT 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 KW45Z41053AFPBT reliable?
The price and inventory of KW45Z41053AFPBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45Z41053AFPBT is usually 5 days.
3.What payment methods are accepted for KW45Z41053AFPBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45Z41053AFPBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45Z41053AFPBT?
KW45Z41053AFPBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45Z41053AFPBT 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 KW45Z41053AFPBT?
For technical support, including KW45Z41053AFPBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45Z41053AFPBT requirements.
6.How does Aetrix verify that KW45Z41053AFPBT is sourced from the original manufacturer or authorized distributors?
All KW45Z41053AFPBT 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 KW45Z41053AFPBT meets industry standards.
7.What is the process for return or replacement of KW45Z41053AFPBT?
All KW45Z41053AFPBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45Z41053AFPBT, 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 KW45Z41053AFPBT part is unused and in its original packaging.
Return procedure for KW45Z41053AFPBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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