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NXP Semiconductors KW45Z41052AFPBT
- Part No.:
- KW45Z41052AFPBT
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
KW45Z41052AFPBT.pdf
- Description:
- K4W1 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,814
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Product details
Overview
KW45Z41052AFPBT from NXP Semiconductors is a secure, AEC-Q100 Grade 2 qualified wireless MCU featuring an Arm Cortex-M33 core (up to 96 MHz), 512 KB flash, 128 KB SRAM, TrustZone-M, and integrated FlexCAN supporting CAN FD per ISO 11898-1 - designed for automotive keyless entry and industrial wireless battery management systems.
For engineers reviewing the KW45Z41052AFPBT datasheet, KW45Z41052AFPBT pinout, KW45Z41052AFPBT application, or KW45Z41052AFPBT equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated package and pin mapping, security architecture details, and confirmed alternative options for automotive-grade wireless MCU selection.
Technical Context
The KW45Z41052AFPBT implements a dual-core architecture: a main Arm Cortex-M33 application core with TrustZone-M isolation and an independent, dedicated CM3 radio controller core (64 MHz) handling Bluetooth LE 5.3 link-layer operations. It integrates EdgeLock™ Secure Enclave with hardware AES/ECC/SHA accelerators, PRINCE flash encryption, and secure boot ROM.
Its power subsystem includes DC/DC buck regulator (1.8–3.6 V), Core_LDO (1.2–3.6 V), and SYS_LDO (1.71–3.6 V), enabling ultra-low-power operation: <3 μA in power-down mode with RTC active and 32 KB SRAM retention, and <1.5 μA in Deep Power-Down mode - all while maintaining AEC-Q100 Grade 2 qualification (–40 °C to +105 °C ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ up to 96 MHz with TrustZone-M, IEEE 754 FPU, DSP, MPU, and 8 KB code cache |
| Memory | 512 KB flash (PRINCE-encrypted option) + 128 KB SRAM with ECC/parity protection |
| Wireless | Bluetooth LE 5.3 radio subsystem (dedicated CM3 core), but KW45Z variant excludes integrated RF transceiver - MCU-only configuration |
| CAN Interface | FlexCAN supporting CAN FD (ISO 11898-1), fully compliant with CAN Specification v2.0 Part B and FD extensions |
| Security | EdgeLock Secure Enclave with hardware crypto accelerators (AES-128/192/256, ECC P-192/224/256/384/521, SHA2-224/256/384/512), TRNG, secure debug disable, and factory Root of Trust |
| Power Modes | Multiple low-power states: <3 μA (power-down w/ RTC + 32 KB SRAM retention), <1.5 μA (deep power-down w/ RTC), down to 300 nA with Smart Power Switch |
| Qualification | AEC-Q100 Grade 2 certified; operating ambient temperature –40 °C to +105 °C; MISRA C:2012 and ASPICE compliant |
Pinout & Package
Package: 40-pin HVQFN (6 × 6 × 0.85 mm, 0.5 mm pitch, wettable flanks). Pinout conforms to NXP SOT618-13(DD) package drawing and KW45Z41052AFPBT-specific pin assignment per datasheet Section 5.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_IO_ABC | Digital I/O supply rail | Supplies Ports A/B/C, Flash, and comparators; 1.71–3.6 V range; supports GPIO voltage translation |
| VDD_CORE | Core logic supply | Feeds Cortex-M33 core and digital peripherals; regulated by internal LDO (1.2–3.6 V); critical for TrustZone domain integrity |
| VDD_SYS | System domain supply | Powers PMC, EFUSE, SRTC, FROs; 1.8–2.25 V normal operation; enables fuse programming at 2.75 V (≤20 s lifetime) |
| FLEXCAN0_TX / FLEXCAN0_RX | CAN FD differential pair | Direct connection to external CAN transceiver; supports bit rates up to 5 Mbps (FD phase); requires external termination |
| LPUART0_RX / LPUART0_TX | Low-power UART interface | Supports LIN physical layer (SAE J2602); enables diagnostic communication in sleep modes with <1 μA wake-up current |
| SWD_DIO / SWD_CLK | ARM Serial Wire Debug | Secure debug interface with optional lockout via eFuses; used for firmware loading and secure field updates |
| RTC_CLKIN | Real-time clock input | Accepts 32.768 kHz crystal or external clock; enables timekeeping during deep power-down with <1.5 μA consumption |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot & Runtime Isolation | Immutable Secure Boot ROM enforces signed image validation; TrustZone-M and TRDC partition memory/peripherals into secure/non-secure domains with configurable access policies |
| Hardware Crypto Acceleration | Dedicated engines for AES-128/192/256 (GCM/CCM), ECC (P-256/384), ECDSA, Ed25519, SHA2-256/512 - offloads 90%+ of TLS 1.2 handshake cycles |
| Flash Encryption | PRINCE XEX block cipher enables on-the-fly decryption of encrypted flash contents, protecting firmware IP without performance penalty |
| Automotive-Grade CAN FD | FlexCAN module supports ISO 11898-1 compliant CAN FD with data phase bit rates up to 5 Mbps and frame payloads up to 64 bytes |
| Ultra-Low-Power Operation | Smart Power Switch achieves <100 nA sleep current with GPIO/timer wake-up; 32 KB SRAM retention in power-down mode consumes <3 μA |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Vehicle proximity detection and authentication using encrypted challenge-response over BLE and CAN FD. IC Role / Device Role / Timing Role: Main MCU executing secure application firmware, managing BLE advertising/scanning, and orchestrating CAN FD command arbitration with body control module. Use Value: Enables sub-100 ms unlock latency with cryptographic key exchange validated inside EdgeLock Secure Enclave - no external secure element required. | Use Scenario: Seamless door unlock and engine start without user button press, relying on authenticated BLE presence and secure CAN FD handshaking. IC Role / Device Role / Timing Role: Real-time coordinator between BLE radio subsystem (via inter-core messaging) and FlexCAN interface, enforcing strict timing windows for anti-relay attack mitigation. Use Value: Meets ISO 21805 anti-theft requirements using hardware-accelerated Ed25519 signatures and tamper-detect pins with timestamping. |
| Wireless Battery Management (WBMS) | Industrial Building Control |
Use Scenario: Cell voltage/temperature monitoring and SOC estimation in EV battery packs, with wireless telemetry to master BMS via BLE and command relay over CAN FD. IC Role / Device Role / Timing Role: Safety-critical sensor fusion node performing ADC sampling (16-bit, 2 Msps), CRC-protected CAN FD message framing, and secure OTA update handling. Use Value: Achieves ASIL-B readiness via SRAM ECC, watchdog supervision, and clock accuracy measurement (SFA module), reducing BOM cost vs. discrete safety monitor. | Use Scenario: Distributed HVAC and lighting control nodes communicating via BLE mesh and centralized coordination over CAN FD backbone. IC Role / Device Role / Timing Role: Edge intelligence hub running local control algorithms, buffering sensor data in protected SRAM, and synchronizing actuator commands across CAN FD network. Use Value: Eliminates gateway dependency with dual-interface concurrency - BLE handles human interaction while CAN FD ensures deterministic machine-to-machine timing (≤50 μs jitter). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MKW45Z512VLL7 | Same KW45Z family, 512 KB flash, 7×7 48-pin HVQFN (SOT619-17); includes identical FlexCAN, security, and BLE stack support | Higher pin count enables more GPIOs, additional LPUART/LPSPI channels, and dual CAN FD controllers | Select when board layout accommodates larger footprint and system requires expanded peripheral concurrency or dual CAN domains |
| KW38Z128VFP5 | Legacy KW3x series; Cortex-M0+ core (48 MHz), 128 KB flash, no TrustZone-M or EdgeLock Enclave; BLE 5.0 only; no CAN FD | Limited to non-safety-critical BLE sensor nodes; lacks automotive qualification and hardware crypto acceleration | Choose only for cost-sensitive, non-automotive designs where security and CAN FD are not required |
Compared with KW45Z41052AFPBT, MKW45Z512VLL7 offers greater I/O and dual CAN FD at the cost of larger PCB area, while KW38Z128VFP5 sacrifices security, performance, and automotive compliance for lower unit cost - making KW45Z41052AFPBT the optimal balance for AEC-Q100-compliant BLE+CAN FD edge nodes.
Availability
KW45Z41052AFPBT is available at Aetrix Electronics and suitable for automotive keyless entry, passive entry/start (PEPS), and industrial wireless battery management systems requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 Grade 2 compliance.
Supply support for KW45Z41052AFPBT 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 focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in MCUs, radar, and trusted execution environments.
The KW45 product line was engineered specifically for automotive-grade wireless edge nodes requiring concurrent BLE 5.3 and CAN FD connectivity, hardened security (TrustZone-M + EdgeLock), and ultra-low-power operation across extended temperature ranges.
FAQ
Does KW45Z41052AFPBT include an integrated Bluetooth LE radio transceiver?
No, KW45Z41052AFPBT is an MCU-only variant of the KW45 family. Unlike KW45B-series parts, it omits the 2.4 GHz RF transceiver and dedicated radio CM3 core. It retains full BLE 5.3 protocol stack support in firmware but requires an external BLE radio IC or module for wireless functionality. The KW45Z41052AFPBT datasheet explicitly lists "MCU only" under Protocol in Table 2.
What is the maximum CAN FD bit rate supported by KW45Z41052AFPBT?
KW45Z41052AFPBT's FlexCAN module supports CAN FD bit rates up to 5 Mbps in the data phase, compliant with ISO 11898-1:2015. This is confirmed in the "Communication interfaces" section of the datasheet, which states full implementation of CAN Specification Version 2.0 Part B and FD Support - enabling 64-byte payloads and higher throughput than classical CAN.
Is KW45Z41052AFPBT pin-compatible with other KW45Z variants in the same package?
Yes, KW45Z41052AFPBT shares identical pinout and electrical characteristics with other 40-pin HVQFN KW45Z variants (e.g., KW45Z41053AFPBT, KW45Z41082AFPBT) per NXP SOT618-13(DD) package drawing and datasheet Section 5.1. Differences are limited to flash size (512 KB vs. 1 MB) and CAN FD enablement ('52' = CAN disabled, '53' = CAN enabled), not pin function or placement.
How does the EdgeLock Secure Enclave in KW45Z41052AFPBT protect firmware updates?
The EdgeLock Secure Enclave in KW45Z41052AFPBT validates OTA firmware images using hardware-accelerated ECDSA signatures before execution, isolates update decryption keys in tamper-resistant memory, and enforces secure boot chain continuity. It supports SPAKE2+ and JPAKE key exchange protocols to establish authenticated sessions - ensuring updates originate only from authorized sources and cannot be replayed or modified.
What is the minimum supply voltage for KW45Z41052AFPBT's DC/DC regulator?
The DC/DC regulator in KW45Z41052AFPBT operates from 1.8 V to 3.6 V, as specified in Table 10 (Voltage and current operating requirements). Below 1.8 V, the regulator cannot maintain regulation; the device must be powered via bypass mode using external LDOs. This minimum voltage is critical for battery-powered automotive applications where supply may sag during cranking.
KW45Z41052AFPBT 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:
KW45Z41052AFPBT FAQ
1.How can I place an order for KW45Z41052AFPBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45Z41052AFPBT 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 KW45Z41052AFPBT reliable?
The price and inventory of KW45Z41052AFPBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45Z41052AFPBT is usually 5 days.
3.What payment methods are accepted for KW45Z41052AFPBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45Z41052AFPBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45Z41052AFPBT?
KW45Z41052AFPBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45Z41052AFPBT 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 KW45Z41052AFPBT?
For technical support, including KW45Z41052AFPBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45Z41052AFPBT requirements.
6.How does Aetrix verify that KW45Z41052AFPBT is sourced from the original manufacturer or authorized distributors?
All KW45Z41052AFPBT 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 KW45Z41052AFPBT meets industry standards.
7.What is the process for return or replacement of KW45Z41052AFPBT?
All KW45Z41052AFPBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45Z41052AFPBT, 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 KW45Z41052AFPBT part is unused and in its original packaging.
Return procedure for KW45Z41052AFPBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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