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NXP Semiconductors KW45B41Z53AFTBR
- Part No.:
- KW45B41Z53AFTBR
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z53AFTBR.pdf
- Description:
- IC RF TXRX+MCU BLE 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,549
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Product details
Overview
KW45B41Z53AFTBR from NXP Semiconductors is a highly secure, single-chip wireless MCU integrating an Arm Cortex-M33 core (up to 96 MHz), Bluetooth Low Energy 5.3 radio, and FlexCAN supporting CAN FD per ISO 11898-1 - all in a 48-pin HVQFN (7 × 7 mm, 0.5 mm pitch, wettable flanks) package. It delivers –106 dBm RX sensitivity at 125 kbps, +10 dBm programmable TX power, 512 KB flash/128 KB SRAM, and AEC-Q100 Grade 2 qualification for automotive keyless entry and WBMS.
For engineers reviewing the KW45B41Z53AFTBR datasheet, KW45B41Z53AFTBR pinout, KW45B41Z53AFTBR application, or KW45B41Z53AFTBR equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, automotive-grade security architecture details, and confirmed alternative options for CAN FD + BLE 5.3 wireless MCU selection.
Technical Context
The KW45B41Z53AFTBR implements a dual-core architecture: a main Arm Cortex-M33 application core with TrustZone-M and EdgeLock™ Secure Enclave (including PRINCE encryption, ECC key generation, and secure boot ROM), plus a dedicated CM3 radio controller core running at up to 64 MHz. Its integrated FlexCAN supports both classical CAN and CAN FD frames up to 5 Mbps, while the BLE 5.3 radio supports Long Range modes (125/500 kbps), 24 simultaneous connections, and on-chip balun with single-ended RF port.
Power management includes DC/DC buck regulator (1.8–3.6 V), Core_LDO and SYS_LDO regulators, ultra-low leakage Smart Power Switch (<100 nA sleep current), and multiple low-power modes - enabling <3 μA power-down current with RTC active and 32 KB SRAM retention. Safety features include MPU, SRAM ECC, dual watchdogs, clock loss detection, and CAC-based frequency accuracy monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ up to 96 MHz with TrustZone-M, IEEE 754 FPU, DSP, and 8 KB code cache - enables real-time secure firmware execution and efficient signal processing. |
| Memory | 512 KB flash / 128 KB SRAM - sufficient for BLE stack + CAN FD protocol stack + application logic with over-the-air update headroom. |
| BLE Radio | BLE 5.3 compliant; –106 dBm RX sensitivity @ 125 kbps; +10 dBm TX output; 24 concurrent connections - supports long-range, low-latency, high-reliability wireless links in noisy automotive environments. |
| FlexCAN | CAN FD support per ISO 11898-1; data rates up to 5 Mbps; full CAN 2.0B compatibility - enables high-bandwidth vehicle network integration without external transceivers. |
| Security | EdgeLock Secure Enclave with AES-128/256, ECC P-256/384, SHA2-256/384, TRNG, secure key storage, and PRINCE on-the-fly flash decryption - meets automotive functional safety and cybersecurity requirements (UNECE R155/R156). |
| Qualification | AEC-Q100 Grade 2 (–40 °C to +105 °C ambient); MISRA C:2012 and ASPICE compliant - qualified for under-hood and body-control module deployment. |
| Package | 48-pin HVQFN, 7 × 7 × 0.85 mm, 0.5 mm pitch, wettable flanks - supports automated optical inspection (AOI) and high-yield reflow in automotive PCB assembly. |
Pinout & Package
48-pin HVQFN (SOT619-17(D)), 7 × 7 × 0.85 mm, 0.5 mm pitch, wettable flanks - optimized for thermal performance and AOI-compatible solder joint inspection in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain power supply | 1.2 V nominal input to LDO_CORE; must be ≥1.65 V before VDD_CORE enable when externally supplied - critical for safe power sequencing. |
| VDD_IO_ABC | I/O bank A/B/C supply | 1.71–3.6 V rail powering GPIO, ADC, DAC, CMP, Flash - defines logic thresholds and analog reference compliance. |
| VDD_RF | RF analog supply | 1.175–3.6 V supply for 32 MHz RF oscillator and BLE transceiver analog blocks - noise-sensitive; requires local decoupling. |
| PTA0 / PTA1 | CAN TX/RX differential pair | Dedicated FlexCAN bus interface pins; require external CAN transceiver for physical layer - not direct CAN PHY. |
| RF_IN / RF_OUT | Single-ended RF port | Integrated balun connects internally; RF_IN is receive input, RF_OUT is transmit output - enables minimal external RF BOM. |
| SWD_DIO / SWD_CLK | ARM Serial Wire Debug interface | Two-pin debug interface supporting secure programming and runtime debugging - protected by TrustZone access controls. |
| RTC_XTAL32K | 32.768 kHz crystal connection | Drives real-time counter with ±20 ppm stability; supports wake-up from deep power-down - essential for battery-backed timing in PEPS systems. |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot + EdgeLock Enclave | Hardware-enforced chain of trust with immutable boot ROM, encrypted flash (PRINCE), and isolated cryptographic accelerators - prevents firmware tampering and cloning in automotive access systems. |
| BLE 5.3 Long Range Mode | –106 dBm sensitivity at 125 kbps enables >100 m line-of-sight range with standard PCB antenna - reduces need for external RF amplifiers in key fob designs. |
| FlexCAN with FD Support | Native CAN FD controller with up to 64-byte payloads and bit rates up to 5 Mbps - eliminates external CAN controller IC in WBMS and gateway modules. |
| Ultra-Low Power Modes | 300 nA sleep current with GPIO/timer wake-up; <3 μA power-down with RTC + 32 KB SRAM retention - extends battery life to multi-year operation in passive entry systems. |
| Automotive-Grade Analog | 16-bit SAR ADC (2 Msps), dual 8-bit DACs with comparators, and 1.0–2.1 V VREF - supports precise voltage/current sensing in battery monitoring and actuator control loops. |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Wireless authentication between vehicle and key fob during approach or ignition. IC Role / Device Role / Timing Role: Primary secure MCU handling cryptographic challenge-response, BLE advertising/scanning, and CAN FD command relay to body control module. Use Value: Meets UNECE R156 cybersecurity requirements via EdgeLock enclave; supports sub-100 ms latency handshakes using 24 concurrent BLE connections and hardware-accelerated ECDSA. | Use Scenario: Hands-free vehicle entry and engine start without button press or key removal. IC Role / Device Role / Timing Role: Dual-role device acting as BLE initiator (low-power scanning) and CAN FD responder (door lock/unlock, immobilizer handshake). Use Value: Achieves <3 μA power-down current with RTC wake-up - enables multi-year CR2032 battery life; wettable-flank HVQFN ensures reliability in vibration-prone door handle assemblies. |
| Wireless Battery Management (WBMS) | Building Control Gateway |
Use Scenario: Monitoring cell voltages, temperatures, and state-of-charge across EV battery packs via wireless sensor nodes. IC Role / Device Role / Timing Role: Edge node MCU collecting analog data (16-bit ADC), encrypting telemetry (AES-GCM), and transmitting via BLE 5.3 Long Range to central gateway. Use Value: On-chip PRINCE encryption enables secure OTA updates; CAN FD interface allows direct integration into existing BMS communication backbones without protocol translation. | Use Scenario: Central hub aggregating BLE sensor data (occupancy, temperature, CO₂) and routing to BACnet/IP or Modbus TCP networks. IC Role / Device Role / Timing Role: Protocol bridge MCU executing BLE host stack, CAN FD master, and LPI2C/LPUART peripheral control for legacy HVAC controllers. Use Value: Dual LPUARTs with LIN capability simplify integration with lighting and HVAC subsystems; AEC-Q100 qualification ensures stable operation in industrial building 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 KW45B41Z83AFTBR | 1 MB flash (vs. 512 KB), same 48-pin HVQFN, identical security/performance specs - no pinout or software changes required. | Supports larger BLE + CAN FD stacks with additional OTA update partitions and extended diagnostic logging. | Select when firmware complexity exceeds 512 KB or future-proofing for feature expansion is required. |
| Renesas RA4W1 | Arm Cortex-M4F @ 48 MHz, BLE 5.0 (not 5.3), no CAN FD - requires external CAN transceiver and lacks EdgeLock-level security. | Suitable for cost-sensitive industrial IoT gateways where CAN FD bandwidth and automotive-grade crypto are not mandatory. | Choose only if BLE 5.3 Long Range, CAN FD, or AEC-Q100 Grade 2 certification are not required. |
Compared with KW45B41Z83AFTBR, the KW45B41Z53AFTBR offers identical security, power, and RF performance but with half the flash - ideal for production-optimized firmware. Versus RA4W1, it delivers certified automotive readiness, native CAN FD, and BLE 5.3 Long Range - eliminating external components and reducing system-level validation effort.
Availability
KW45B41Z53AFTBR is available at Aetrix Electronics and suitable for automotive keyless entry systems, wireless battery management sensors, and industrial CAN FD gateways requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for KW45B41Z53AFTBR 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 wireless MCUs and automotive-grade security IP.
The KW45 product line was designed specifically for automotive and industrial wireless control applications demanding concurrent BLE 5.3 and CAN FD connectivity, hardware-enforced security, and AEC-Q100 qualification - targeting PEPS, WBMS, and smart gateway use cases.
FAQ
What is the maximum operating temperature for the KW45B41Z53AFTBR?
The KW45B41Z53AFTBR is AEC-Q100 Grade 2 qualified with an ambient operating temperature range of –40 °C to +105 °C and junction temperature up to +125 °C. This rating is validated per JEDEC JESD22-A103 and supports under-hood and body-control module deployments where thermal robustness is critical. The KW45B41Z53AFTBR maintains full specification compliance across this range, including BLE radio sensitivity and CAN FD timing accuracy.
Does the KW45B41Z53AFTBR include an integrated CAN transceiver?
No, the KW45B41Z53AFTBR integrates a FlexCAN controller supporting CAN FD per ISO 11898-1, but it does not include a physical-layer CAN transceiver. External CAN transceivers (e.g., TJA1044, SN65HVD233) must be used on the PTA0/PTA1 pins. The KW45B41Z53AFTBR handles protocol stack, message filtering, and FD frame formatting in hardware - reducing CPU load versus software-based CAN implementations.
What security features are implemented in the KW45B41Z53AFTBR's EdgeLock Secure Enclave?
The KW45B41Z53AFTBR's EdgeLock Secure Enclave includes hardware-accelerated AES-128/192/256, ECC NIST P-256/P-384, SHA2-256/384, TRNG, PRINCE on-the-fly flash decryption, secure key storage, and secure debug disable. It enforces privilege domains via TrustZone-M and TRDC, isolates cryptographic operations, and supports secure boot with immutable ROM verification - meeting ISO/SAE 21434 and UNECE R156 cybersecurity management system requirements.
Can the KW45B41Z53AFTBR operate without an external 32 MHz crystal?
Yes, the KW45B41Z53AFTBR can operate without an external 32 MHz RF crystal by using its internal 192 MHz FRO (free-running oscillator) divided down to 48/64/96 MHz for the application core and 64 MHz for the BLE radio controller. However, BLE radio performance (e.g., frequency accuracy, EVM) requires the 32 MHz crystal for RF PLL locking; omitting it degrades BLE compliance and range. The KW45B41Z53AFTBR datasheet specifies ±20 ppm crystal tolerance for full BLE 5.3 certification.
What is the minimum supply voltage for the KW45B41Z53AFTBR's DC/DC regulator?
The KW45B41Z53AFTBR's integrated DC/DC regulator operates from 1.8 V to 3.6 V per Table 10 of the datasheet. At 1.8 V input, it delivers regulated output to Core_LDO and SYS_LDO domains while maintaining full functionality - enabling compatibility with single-cell LiFePO₄ (2.5–3.65 V) or dual-cell alkaline (2.0–3.2 V) battery systems. Below 1.8 V, the DC/DC must be bypassed and external supplies applied directly to VDD_CORE and VDD_SYS.
KW45B41Z53AFTBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- Kinetis KW45B
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 48-HVQFN (7x7)
KW45B41Z53AFTBR FAQ
1.How can I place an order for KW45B41Z53AFTBR through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z53AFTBR 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 KW45B41Z53AFTBR reliable?
The price and inventory of KW45B41Z53AFTBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z53AFTBR is usually 5 days.
3.What payment methods are accepted for KW45B41Z53AFTBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z53AFTBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z53AFTBR?
KW45B41Z53AFTBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z53AFTBR 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 KW45B41Z53AFTBR?
For technical support, including KW45B41Z53AFTBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z53AFTBR requirements.
6.How does Aetrix verify that KW45B41Z53AFTBR is sourced from the original manufacturer or authorized distributors?
All KW45B41Z53AFTBR 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 KW45B41Z53AFTBR meets industry standards.
7.What is the process for return or replacement of KW45B41Z53AFTBR?
All KW45B41Z53AFTBR units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z53AFTBR, 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 KW45B41Z53AFTBR part is unused and in its original packaging.
Return procedure for KW45B41Z53AFTBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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