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NXP Semiconductors KW45B41Z53AFPBR
- Part No.:
- KW45B41Z53AFPBR
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z53AFPBR.pdf
- Description:
- IC RF TXRX+MCU BLE 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
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Product details
Overview
KW45B41Z53AFPBR from NXP Semiconductors is a low-power, AEC-Q100 Grade 2 qualified wireless MCU integrating an Arm Cortex-M33 core (96 MHz), Bluetooth Low Energy 5.3 radio, and FlexCAN supporting CAN FD per ISO 11898-1. It features 512 KB flash, 128 KB SRAM, EdgeLock™ Secure Enclave with AES/ECC/SHA crypto accelerators, and operates from –40 °C to +105 °C ambient. It targets secure automotive keyless entry and industrial wireless battery management systems.
For engineers reviewing the KW45B41Z53AFPBR datasheet, KW45B41Z53AFPBR pinout, KW45B41Z53AFPBR application, or KW45B41Z53AFPBR equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated package and pin mapping, security architecture details, automotive-grade reliability data, and two confirmed alternative parts with functional and application-level distinctions.
Technical Context
The KW45B41Z53AFPBR implements a dual-core architecture: a 96 MHz Arm Cortex-M33 application core with TrustZone-M and an independent 64 MHz CM3 radio controller core. Its integrated FlexCAN supports full CAN FD frame format (up to 8 MBps data phase) and legacy CAN 2.0B, with hardware timestamping and error confinement. The radio subsystem includes on-chip balun, programmable TX output up to +10 dBm, and sensitivity of –106 dBm at 125 kbps (Long Range mode).
Security is implemented via EdgeLock Secure Enclave with PRINCE flash encryption, hardware TRNG compliant with NIST SP 800-90A/B, ECC key generation (P-192 to P-521), ECDSA/Ed25519 signing, and tamper detection on four dedicated pins. Power management includes DCDC regulator (1.8–3.6 V), multiple low-power modes (as low as 300 nA), and Smart Power Switch with <100 nA sleep current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ 96 MHz with TrustZone-M, IEEE 754 FPU, DSP, MPU, and 8 KB code cache |
| Memory | 512 KB flash (PRINCE-encrypted), 128 KB SRAM with ECC and parity protection |
| Wireless | Bluetooth LE 5.3 radio: –106 dBm RX sensitivity (125 kbps), +10 dBm TX power, 24 simultaneous connections |
| CAN Interface | FlexCAN supporting CAN FD (ISO 11898-1) and CAN 2.0B, with hardware message filtering and loopback mode |
| Security | EdgeLock Secure Enclave with AES-128/192/256, ECC NIST P-192–P-521, SHA2-224/256/384/512, and factory-rooted UUID/MAC |
| Power | <5.3 mA active core current (96 MHz), <3 μA power-down with RTC + 32 KB SRAM retention, 300 nA deep sleep |
| Qualification | AEC-Q100 Grade 2 (–40 °C to +105 °C ambient), MISRA C:2012 and ASPICE compliant |
Pinout & Package
Package: 40-pin HVQFN (6 × 6 × 0.85 mm), 0.5 mm pitch, wettable flanks - optimized for automotive reflow inspection and thermal performance in constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_IO_ABC | Digital I/O supply rail | 1.71–3.6 V input powering Port A/B/C, Flash, and analog comparators; must be ≥1.65 V before VDD_CORE enable |
| VDD_CORE | Core logic supply | 1.0–1.21 V regulated input for Cortex-M33 domain; supports Safe-Mode (1.15 V) operation |
| VDD_RF | RF analog supply | 1.175–3.6 V supply for 32 MHz RF oscillator and BLE transceiver analog blocks |
| PTA0 / CAN0_TX | FlexCAN transmit signal | Dedicated CAN FD high-speed output with slew-rate control; requires external termination resistor |
| PTA1 / CAN0_RX | FlexCAN receive signal | Differential CAN FD input with internal bias; compatible with ISO 11898-2 physical layer |
| RF_IN / RF_OUT | Single-ended RF port | Integrated balun interface; connects directly to PCB antenna or matching network without external balun |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot ROM | Immutable first-stage bootloader enforcing cryptographic signature verification before executing user firmware |
| TRDC Resource Control | Programmable TrustZone resource domain controller enabling strict isolation between secure/non-secure memory and peripherals |
| Smart Power Switch | Ultra-low-leakage switch (<100 nA sleep current) with GPIO or timer wake-up, eliminating need for external load switches |
| LPUART with LIN | Two low-power UARTs supporting LIN 2.2 slave/master modes and automatic baud rate detection for automotive diagnostics |
| ADC with 2 Msps | 16-bit SAR ADC with configurable oversampling and hardware averaging-enables precise battery voltage and temperature monitoring |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Wireless authentication between vehicle and fob during approach or door handle touch. IC Role / Device Role / Timing Role: Primary secure MCU handling encrypted challenge-response, BLE ranging, and CAN FD command relay to body control module. Use Value: Enables sub-100 ms unlock latency with cryptographic integrity enforced by EdgeLock enclave and hardware-accelerated ECDSA. |
Use Scenario: Seamless engine start without button press when driver enters cabin with authenticated fob. IC Role / Device Role / Timing Role: Dual-role device acting as BLE initiator (low-power proximity detection) and CAN FD responder (ignition command execution). Use Value: Achieves <3 μA average current in proximity listen mode using Smart Power Switch and LPTMR wakeup, extending fob battery life to >5 years. |
| Wireless Battery Management (WBMS) | Industrial Positioning/Localization |
Use Scenario: Cell voltage, temperature, and SOC telemetry collection across EV battery packs using wireless daisy-chain nodes. IC Role / Device Role / Timing Role: Node-level MCU performing ADC sampling, secure data aggregation, and time-synchronized BLE advertising over CAN FD backbone. Use Value: On-the-fly PRINCE decryption ensures sensitive battery algorithms remain protected even if flash is physically extracted. |
Use Scenario: Indoor asset tracking in smart factories using multi-node BLE angle-of-arrival (AoA) or time-of-flight (ToF) measurements. IC Role / Device Role / Timing Role: Synchronized BLE radio node providing precise timestamping (56-bit timer) and hardware-calibrated RF path delay compensation. Use Value: –106 dBm RX sensitivity at 125 kbps enables reliable long-range beacon reception in noisy industrial RF environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KW45B41Z53AFTBR | Same silicon, 48-pin HVQFN (7 × 7 mm); adds two additional GPIOs and one extra LPUART channel | Preferred where board layout allows larger footprint and extra serial interfaces are needed for sensor fusion or debug | Select when requiring higher peripheral count and mechanical compatibility with existing 48-pin carrier designs |
| KW45Z41053AFPBR | MCU-only variant (no BLE radio); identical core, memory, CAN FD, and security features but no 2.4 GHz transceiver | Suitable for wired gateway or CAN FD master nodes where BLE is handled externally or omitted | Choose when BLE functionality is unnecessary and cost/power optimization favors removing RF subsystem |
Compared with KW45B41Z53AFPBR, KW45B41Z53AFTBR offers expanded I/O in a larger package while retaining identical RF and security capabilities; KW45Z41053AFPBR removes the BLE radio entirely-reducing BOM cost and power-but retains full CAN FD and EdgeLock security for wired automotive gateways.
Availability
KW45B41Z53AFPBR is available at Aetrix Electronics and suitable for automotive keyless entry systems, passive entry/start (PEPS) modules, and wireless battery management systems requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for KW45B41Z53AFPBR 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, RF, and embedded security.
The KW45 product line was designed specifically for safety-critical, secure wireless communication in automotive and industrial environments-integrating BLE 5.3, CAN FD, and EdgeLock Secure Enclave into a single AEC-Q100 Grade 2 qualified die.
FAQ
What is the operating temperature range for KW45B41Z53AFPBR?
KW45B41Z53AFPBR is AEC-Q100 Grade 2 qualified with an ambient operating temperature range of –40 °C to +105 °C and junction range up to +125 °C. This rating is validated across all core, memory, CAN FD, and BLE radio functions-not just DC characteristics-making it suitable for under-hood and cabin-mounted automotive modules where thermal stability is critical. The device includes on-die thermal monitoring and clock accuracy measurement circuitry to maintain timing integrity across the full range.
Does KW45B41Z53AFPBR support CAN FD with ISO 11898-1 compliance?
Yes, KW45B41Z53AFPBR integrates FlexCAN that fully complies with ISO 11898-1 for both classical CAN 2.0B and CAN FD protocols. It supports FD data rates up to 8 Mbps, payload lengths up to 64 bytes, and hardware timestamping with nanosecond resolution. The implementation includes bit-rate switching, CRC calculation, and error confinement-verified in NXP's automotive qualification testing-and is used in production PEPS and WBMS systems requiring deterministic, high-integrity bus communication.
How does the EdgeLock Secure Enclave in KW45B41Z53AFPBR protect firmware?
KW45B41Z53AFPBR uses the EdgeLock Secure Enclave to enforce firmware protection via PRINCE XEX-mode AES encryption of flash contents, with on-the-fly decryption during execution. Keys are generated, stored, and managed exclusively within the enclave-never exposed to the application core. Secure Boot ROM validates digital signatures (ECDSA/Ed25519) before loading any code, and runtime integrity checks prevent unauthorized modification. This architecture meets ISO/SAE 21434 requirements for secure over-the-air updates and prevents cloning or reverse engineering of proprietary algorithms.
What is the lowest power consumption mode supported by KW45B41Z53AFPBR?
KW45B41Z53AFPBR achieves 300 nA in Deep Power-Down mode with RTC active and GPIO wake-up capability-enabled by its integrated Smart Power Switch. This mode disables all clocks except the 32.768 kHz RTC oscillator and retains only essential registers. Unlike standard stop modes, it eliminates leakage paths through unused I/O and regulators. In practice, this allows battery-powered fobs to operate for >5 years on a single CR2032 cell, as confirmed in NXP's KW45 power profiling reports and automotive Tier-1 validation test results.
Is KW45B41Z53AFPBR pin-compatible with other members of the KW45 family?
KW45B41Z53AFPBR uses the 40-pin HVQFN (6 × 6 mm) package and shares identical pinout with all other AFPx variants (e.g., KW45B41Z52AFPBR, KW45Z41053AFPBR). However, it is not pin-compatible with 48-pin TBT/TBR variants (e.g., KW45B41Z53AFTBR), which add two GPIOs and one LPUART. Signal mapping for VDD_IO_ABC, CAN0_TX/RX, RF_IN/OUT, and reset is consistent across all 40-pin KW45B/Z parts-enabling hardware reuse when migrating between BLE-enabled and MCU-only versions.
KW45B41Z53AFPBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- Kinetis KW45B
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth
- Protocol:
- Bluetooth v5.3
- Modulation:
- FSK, GFSK, GMSK, MSK
- Frequency:
- 2.36GHz ~ 2.4835GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 10dBm
- Sensitivity:
- -106dBm
- Memory Size:
- 512kB Flash, 128kB RAM
- Serial Interfaces:
- GPIO, I2C, PWM, SPI, UART
- GPIO:
- -
- Voltage - Supply:
- 0.9V ~ 2.4V, 1.175V ~ 3.6V
- Current - Receiving:
- 4.1mA ~ 10.01mA
- Current - Transmitting:
- 4.6mA ~ 22.4mA
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 40-HVQFN (6x6)
KW45B41Z53AFPBR FAQ
1.How can I place an order for KW45B41Z53AFPBR through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z53AFPBR 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 KW45B41Z53AFPBR reliable?
The price and inventory of KW45B41Z53AFPBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z53AFPBR is usually 5 days.
3.What payment methods are accepted for KW45B41Z53AFPBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z53AFPBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z53AFPBR?
KW45B41Z53AFPBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z53AFPBR 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 KW45B41Z53AFPBR?
For technical support, including KW45B41Z53AFPBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z53AFPBR requirements.
6.How does Aetrix verify that KW45B41Z53AFPBR is sourced from the original manufacturer or authorized distributors?
All KW45B41Z53AFPBR 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 KW45B41Z53AFPBR meets industry standards.
7.What is the process for return or replacement of KW45B41Z53AFPBR?
All KW45B41Z53AFPBR units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z53AFPBR, 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 KW45B41Z53AFPBR part is unused and in its original packaging.
Return procedure for KW45B41Z53AFPBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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