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NXP Semiconductors KW45B41Z53AFPBT
- Part No.:
- KW45B41Z53AFPBT
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z53AFPBT.pdf
- Description:
- IC RF TXRX+MCU BLE 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,218
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Product details
Overview
KW45B41Z53AFPBT 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 - designed for secure automotive access systems including Passive Entry/Passive Start (PEPS) and Wireless Battery Management Systems (WBMS). It features 512 KB flash, 128 KB SRAM, EdgeLock™ Secure Enclave, TrustZone-M, and operates from –40 °C to +105 °C ambient.
For engineers reviewing the KW45B41Z53AFPBT datasheet, KW45B41Z53AFPBT pinout, KW45B41Z53AFPBT application, or KW45B41Z53AFPBT equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready procurement details specific to the 40-pin HVQFN (6 × 6 mm, wettable flanks) variant with 512 KB flash and CAN FD support.
Technical Context
The KW45B41Z53AFPBT implements a dual-core architecture: a 96 MHz Arm Cortex-M33 application core with TrustZone-M isolation and an independent 64 MHz CM3 radio controller core handling BLE 5.3 link-layer operations. Its security subsystem integrates EdgeLock™ Secure Enclave with hardware AES-128/256, ECC P-256/384, SHA2-256/384, TRNG, and PRINCE-based on-the-fly flash decryption.
Power management includes integrated DCDC (1.8–3.6 V), Core_LDO (1.2–3.6 V), and SYS_LDO (1.71–3.6 V) regulators, enabling ultra-low power modes: <3 μA in power-down with RTC active and 32 KB SRAM retention, and <1.5 μA in Deep Power-Down mode - all while maintaining full CAN FD and BLE 5.3 functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ up to 96 MHz with TrustZone-M, FPU, DSP, MPU, and 8 KB code cache |
| Memory | 512 KB flash (PRINCE-encrypted option) + 128 KB SRAM with ECC/parity protection |
| Wireless | BLE 5.3 radio: –106 dBm sensitivity @ 125 kbps, +10 dBm TX output, 24 simultaneous connections |
| CAN Interface | FlexCAN supporting CAN FD per ISO 11898-1, including data-rate switching up to 5 Mbps |
| Security | EdgeLock™ Secure Enclave with hardware crypto accelerators, secure boot ROM, and factory Root of Trust |
| Power | <5.3 mA active current @ 96 MHz; <3 μA power-down with RTC + 32 KB SRAM retention |
| 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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain power supply | Supplies 1.2 V regulated voltage to Cortex-M33 core and digital peripherals; requires external decoupling |
| VDD_SYS | System domain power supply | Powers PMC, EFUSE, SRTC, and free-running oscillators; supports fuse programming at 2.75 V |
| VDD_IO_ABC | I/O bank A/B/C supply | Configurable 1.71–3.6 V rail for GPIOs, ADC, DAC, and comparators; enables mixed-voltage interfacing |
| VDD_RF | RF analog supply | Provides clean 1.175–3.6 V bias for 2.4 GHz transceiver analog blocks and crystal oscillator |
| PTA0 / CAN0_RX | FlexCAN receive input | Dedicated differential input for CAN FD bus; supports high-speed and flexible data-rate modes |
| PTA1 / CAN0_TX | FlexCAN transmit output | Open-drain output with integrated termination resistor; compliant with ISO 11898-1 physical layer |
| RF_IN / RF_OUT | Single-ended RF port | Integrated balun interface for antenna connection; eliminates external matching network in basic designs |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot & Debug | Immutable boot ROM enforces signed image validation; debug access restricted by TrustZone-M and TRDC policies |
| On-the-fly Flash Decryption | PRINCE XEX cipher decrypts encrypted flash contents during execution - protects firmware IP without runtime overhead |
| Ultra-Low-Power Smart Switch | Integrated power switch draws <100 nA in sleep; wake-up via GPIO or internal timer avoids external PMIC |
| BLE 5.3 Long Range | –106 dBm sensitivity at 125 kbps enables extended indoor range (>200 m typical) for key fob and sensor applications |
| Automotive-Grade CAN FD | Full CAN FD implementation supports payloads up to 64 bytes and bit rates up to 5 Mbps - meets ASAM MCD-2 MC requirements |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Vehicle authentication using encrypted challenge-response handshake between fob and ECU over 125 kHz LF + 2.4 GHz BLE. IC Role / Device Role / Timing Role: KW45B41Z53AFPBT serves as the secure BLE endpoint with integrated FlexCAN for ECU communication and EdgeLock enclave for cryptographic key storage. Use Value: Enables certified AEC-Q100 operation at +105 °C under hood conditions while maintaining sub-100 μs latency for door unlock response. | Use Scenario: Seamless vehicle entry and engine start without user interaction, requiring precise timing synchronization between LF field detection and BLE response. IC Role / Device Role / Timing Role: KW45B41Z53AFPBT acts as the central secure MCU coordinating LF receiver, BLE transceiver, and CAN FD gateway with deterministic interrupt latency. Use Value: Dual-core architecture isolates time-critical LF timing (M33 core) from BLE stack processing (radio core), ensuring <500 ns jitter in 125 kHz carrier generation. |
| Wireless BMS | Industrial Positioning |
Use Scenario: Monitoring cell voltages, temperatures, and state-of-charge across EV battery packs using wireless sensor nodes communicating via BLE mesh. IC Role / Device Role / Timing Role: KW45B41Z53AFPBT functions as the secure node controller with integrated 16-bit ADC (2 Msps), CAN FD backhaul, and encrypted OTA updates. Use Value: On-chip PRINCE encryption and secure key storage prevent tampering with SOC/SOH algorithms during wireless firmware upgrades. | Use Scenario: Real-time asset tracking in smart factories using BLE AoA/AoD with synchronized multi-node timing and CAN-connected PLC integration. IC Role / Device Role / Timing Role: KW45B41Z53AFPBT provides BLE 5.3 direction-finding capability, timestamped packet reception via 56-bit timer, and CAN FD uplink to control network. Use Value: Hardware-accelerated SHA2-256 and ECC P-256 enable authenticated beacon frames resistant to replay attacks in dense 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 |
|---|---|---|---|
| NXP KW45B41Z53AFTBT | Same silicon, 48-pin HVQFN (7 × 7 mm); adds two GPIOs and one additional LPUART channel | Preferred where board space allows larger package and extra serial interfaces are needed for diagnostics or LIN gateway | Select when higher I/O count and pin-accessible debug signals (SWD) are required; not drop-in compatible due to footprint change |
| NXP KW45Z41053AFPBT | MCU-only variant (no BLE radio); identical 40-pin HVQFN package, 512 KB flash, CAN FD, and security features | Suitable for host-controller architectures where BLE is handled by external module (e.g., BT5.3 dongle via UART) | Choose when system-level RF certification burden must be reduced or when BLE coexistence with other radios requires physical separation |
Compared with KW45B41Z53AFPBT, the 48-pin KW45B41Z53AFTBT offers expanded peripheral routing but requires PCB redesign, while the radio-less KW45Z41053AFPBT retains identical mechanical fit and security stack - enabling reuse of secure boot flow and CAN FD firmware in hybrid RF architectures.
Availability
KW45B41Z53AFPBT is available at Aetrix Electronics and suitable for automotive secure access, PEPS systems, and wireless battery management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for KW45B41Z53AFPBT 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The KW45 product family targets automotive-grade wireless control applications, combining BLE 5.3, CAN FD, and hardware-enforced security to address functional safety and cybersecurity requirements in modern vehicle architectures.
FAQ
What is the operating temperature range for KW45B41Z53AFPBT?
KW45B41Z53AFPBT is AEC-Q100 Grade 2 qualified with an ambient operating temperature range of –40 °C to +105 °C and junction temperature range up to +125 °C. This rating is validated across all integrated functions - including BLE 5.3 radio, FlexCAN, and EdgeLock Secure Enclave - ensuring reliable operation in under-hood automotive environments.
Does KW45B41Z53AFPBT support CAN FD with ISO 11898-1 compliance?
Yes, KW45B41Z53AFPBT integrates FlexCAN supporting full CAN FD functionality per ISO 11898-1, including data-rate switching up to 5 Mbps, payloads up to 64 bytes, and error confinement mechanisms. The implementation includes dedicated CAN0_RX and CAN0_TX pins with internal termination and configurable bit timing registers accessible via standard CAN driver APIs.
How does the EdgeLock Secure Enclave function in KW45B41Z53AFPBT?
The EdgeLock Secure Enclave in KW45B41Z53AFPBT provides isolated cryptographic services including AES-128/256, ECC P-256/384, SHA2-256/384, TRNG, and secure key storage. It operates independently from the main Cortex-M33 core, enforcing privilege boundaries via TrustZone-M and TRDC - enabling secure boot, encrypted OTA updates, and protected key derivation without software exposure.
What power modes are available on KW45B41Z53AFPBT and their typical current draw?
KW45B41Z53AFPBT supports multiple low-power states: power-down mode draws <3 μA with RTC active and 32 KB SRAM retention; Deep Power-Down consumes <1.5 μA with RTC running; and ultra-low-leakage Smart Power Switch mode achieves <100 nA sleep current. All modes preserve FlexCAN message buffers and BLE advertising state for rapid wake-up.
Is KW45B41Z53AFPBT pin-compatible with other KW45 variants?
KW45B41Z53AFPBT uses a 40-pin HVQFN package (6 × 6 mm) and shares identical pinout with other AFPx-suffixed KW45B/Z parts in the same package size, including KW45B41Z52AFPBT and KW45Z41053AFPBT. However, it is not pin-compatible with 48-pin TBT-suffixed variants (e.g., KW45B41Z53AFTBT) due to differing pin counts and layout.
KW45B41Z53AFPBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- Kinetis KW45B
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Type:
- TxRx + MCU
- RF Family/Standard:
- Bluetooth, General ISM > 1GHz
- Protocol:
- Bluetooth v5.3
- Modulation:
- FSK, GFSK, GMSK, MSK
- Frequency:
- 2.36GHz ~ 2.48GHz
- Data Rate (Max):
- 2Mbps
- Power - Output:
- 10dBm
- Sensitivity:
- -106dBm
- Memory Size:
- 512kB Flash, 128kB RAM
- Serial Interfaces:
- I2C, PWM, SPI, UART
- GPIO:
- -
- Voltage - Supply:
- 1.8V ~ 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)
KW45B41Z53AFPBT FAQ
1.How can I place an order for KW45B41Z53AFPBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z53AFPBT 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 KW45B41Z53AFPBT reliable?
The price and inventory of KW45B41Z53AFPBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z53AFPBT is usually 5 days.
3.What payment methods are accepted for KW45B41Z53AFPBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z53AFPBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z53AFPBT?
KW45B41Z53AFPBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z53AFPBT 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 KW45B41Z53AFPBT?
For technical support, including KW45B41Z53AFPBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z53AFPBT requirements.
6.How does Aetrix verify that KW45B41Z53AFPBT is sourced from the original manufacturer or authorized distributors?
All KW45B41Z53AFPBT 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 KW45B41Z53AFPBT meets industry standards.
7.What is the process for return or replacement of KW45B41Z53AFPBT?
All KW45B41Z53AFPBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z53AFPBT, 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 KW45B41Z53AFPBT part is unused and in its original packaging.
Return procedure for KW45B41Z53AFPBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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