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NXP Semiconductors KW45B41Z52AFPBT
- Part No.:
- KW45B41Z52AFPBT
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z52AFPBT.pdf
- Description:
- IC RF TXRX+MCU BLE 40HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,827
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Product details
Overview
KW45B41Z52AFPBT 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 interface - but without CAN FD support. It features 512 KB flash, 128 KB SRAM, TrustZone-M security, and operates from –40 °C to +105 °C ambient. It targets secure automotive access systems requiring BLE connectivity and deterministic CAN messaging.
For engineers reviewing the KW45B41Z52AFPBT datasheet, KW45B41Z52AFPBT pinout, KW45B41Z52AFPBT application, or KW45B41Z52AFPBT equivalent, key selection considerations include its 40-pin HVQFN wettable flank package, absence of CAN FD (vs. 53-series variants), BLE 5.3 Long Range sensitivity (–106 dBm @ 125 kbps), integrated EdgeLock Secure Enclave, and automotive-grade power-down current (<3 μA with RTC active).
Technical Context
The KW45B41Z52AFPBT 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. Its FlexCAN module supports full CAN 2.0B (ISO 11898-1) but explicitly excludes CAN FD functionality per ordering table and device family documentation.
Security is enforced via hardware-accelerated AES-128/192/256, ECC P-256/384, SHA2-256/384, PRINCE flash encryption, and a dedicated EdgeLock Secure Enclave with TRDC-based resource domain control. Power management includes DC/DC regulator, Smart Power Switch (<100 nA sleep current), and multiple low-power modes down to 300 nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ 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 | Bluetooth LE 5.3 radio: –106 dBm RX sensitivity @ 125 kbps, +10 dBm TX output, 24 simultaneous connections |
| CAN Interface | FlexCAN supporting CAN 2.0B only (ISO 11898-1); no CAN FD capability per ordering table and datasheet revision 9 |
| Security | EdgeLock Secure Enclave with TRDC, hardware crypto accelerators, TRNG, secure boot ROM, and factory Root of Trust |
| Power | <5.3 mA active core current @ 96 MHz; <3 μA in power-down mode with RTC active and 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), pitch 0.5 mm, wettable flanks - confirmed per Table 1 and package drawing SOT618-13(DD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_IO_ABC | Digital I/O supply rail | 1.71–3.6 V supply for Ports A/B/C, Flash, and comparators; must be ≥1.65 V before enabling VDD_CORE externally |
| 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 2.4 GHz transceiver analog blocks and RF oscillator |
| PTA0 / PTB0 | GPIO / CAN_TX / CAN_RX | Primary CAN 2.0B signal pins; not capable of CAN FD frame transmission or reception |
| XTAL32M | RF crystal oscillator input | 32 MHz fundamental-mode crystal connection for BLE radio timing reference |
| RTC_CLKIN | Real-time clock input | 32.768 kHz external crystal or clock source for RTC and low-power timer domains |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot & Debug | Immutable boot ROM enforcing signed image validation; debug access gated by EdgeLock Secure Enclave permissions |
| Hardware Crypto Acceleration | Dedicated AES-128/192/256 (GCM/CCM), ECC P-256/384, SHA2-256/384 engines reducing CPU overhead by >90% vs. software-only implementation |
| Low-Power CAN Interface | FlexCAN module with automatic bus-off recovery, listen-only mode, and wake-on-CAN - optimized for <10 μA standby current in automotive body electronics |
| BLE Long Range Support | 125 kbps/500 kbps PHY modes with –106 dBm/–102 dBm sensitivity enabling 1+ km outdoor range in line-of-sight conditions |
| Smart Power Switch | Integrated ultra-low-leakage switch with <100 nA sleep current and GPIO/timer wakeup - eliminates need for external load switches in battery-powered PEPS modules |
Applications
| Secure Car Access | Keyless Entry Systems |
|---|---|
Use Scenario: Vehicle proximity detection and encrypted challenge-response authentication between fob and ECU. IC Role / Device Role / Timing Role: Primary BLE 5.3 host MCU executing secure firmware, managing CAN message routing to door locks, and enforcing cryptographic key lifecycle via EdgeLock enclave. Use Value: Enables sub-100 ms unlock latency with tamper-resistant key storage and over-the-air update capability - meeting ISO 21434 cybersecurity requirements. | Use Scenario: Wireless entry system where user initiates unlock via smartphone app or physical fob within 3 m of vehicle. IC Role / Device Role / Timing Role: BLE radio controller and application processor handling L2CAP/ATT/GATT stack, while FlexCAN forwards commands to body control module (BCM). Use Value: Achieves BLE advertising interval ≤20 ms and CAN message latency <500 μs - critical for seamless user experience in OEM production systems. |
| Passive Entry/Start (PEPS) | Wireless Battery Management (WBMS) |
Use Scenario: Continuous low-power RF field detection and authenticated engine start without button press. IC Role / Device Role / Timing Role: Dual-role MCU: BLE initiator for fob localization and CAN master for immobilizer handshake; uses Smart Power Switch to cycle RF field at 30 Hz with <3 μA average current. Use Value: Meets ISO 14229 UDS diagnostic requirements while sustaining >10-year coin-cell battery life in fob applications. | Use Scenario: Monitoring cell voltage, temperature, and SOC across 12S Li-ion packs in EV traction batteries using wireless sensor nodes. IC Role / Device Role / Timing Role: Sensor node MCU collecting ADC data, encrypting telemetry via hardware AES, and transmitting via BLE to gateway - with CAN used for local pack-level coordination. Use Value: Eliminates wiring harness complexity while maintaining <10 mV cell voltage measurement accuracy and <100 ms end-to-end telemetry latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KW45B41Z53AFPBT | Same package and core, but adds CAN FD support (ISO 11898-1 FD), 1 MB flash option, and higher RF output (+10 dBm guaranteed) | Required for automotive gateway designs needing CAN FD bandwidth (>5 Mbps) and firmware OTA updates over CAN FD | Select when CAN FD protocol compliance and larger code space are mandatory; KW45B41Z52AFPBT remains optimal for cost-sensitive CAN 2.0B-only nodes. |
| K32W061DHA5VK | Single-core Cortex-M0+, BLE 5.0 only, no CAN interface, 512 KB flash, 128 KB SRAM, QFN48 package | Suitable for non-automotive BLE sensor nodes without CAN requirements; lacks AEC-Q100 qualification and EdgeLock security | Choose for industrial IoT edge sensors where automotive qualification and CAN integration are unnecessary - reduces BOM cost by ~22%. |
Compared with KW45B41Z53AFPBT, KW45B41Z52AFPBT trades CAN FD capability and extended flash for lower unit cost and identical power/performance in CAN 2.0B-only architectures; versus K32W061DHA5VK, it delivers automotive-grade reliability, dual-core BLE processing, and hardware-enforced security essential for vehicle access systems.
Availability
KW45B41Z52AFPBT is available at Aetrix Electronics and suitable for automotive secure access systems, keyless entry modules, passive entry/start (PEPS) controllers, and wireless battery management sensor nodes requiring stable component supply and long-term industrial availability.
Supply support for KW45B41Z52AFPBT 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 wireless SoCs.
The KW45 product family is designed specifically for automotive-grade wireless control applications - combining BLE 5.3, functional safety features, and hardware security to enable secure car access, PEPS, and WBMS systems compliant with ISO 21434 and UN R155.
FAQ
Does KW45B41Z52AFPBT support CAN FD?
No, KW45B41Z52AFPBT does not support CAN FD. Per NXP's KW45 Product Family Data Sheet Rev. 9 (Table 1), the "52" suffix denotes CAN 2.0B-only capability, while "53"-suffixed variants (e.g., KW45B41Z53AFPBT) include full CAN FD compliance per ISO 11898-1 FD. The KW45B41Z52AFPBT FlexCAN module implements CAN 2.0B Part B only, with no FD frame encoding or bit-rate switching support.
What is the maximum BLE transmit power for KW45B41Z52AFPBT?
The KW45B41Z52AFPBT supports programmable BLE transmit output power up to +10 dBm, verified per datasheet Section 3.4.3. At 0 dBm output, typical TX current is 4.6 mA; at +10 dBm, it rises to 18.7 mA (DC-DC buck mode, 3.3 V supply). This enables robust link budgets for automotive key fobs operating in noisy RF environments.
Is KW45B41Z52AFPBT qualified for automotive use?
Yes, KW45B41Z52AFPBT is AEC-Q100 Grade 2 qualified for ambient temperatures from –40 °C to +105 °C, with junction temperature support up to +125 °C. It also complies with MISRA C:2012 coding standards and Automotive SPICE (ASPICE) development processes - making it suitable for production automotive ECUs including door modules and PEPS controllers.
What security features are implemented in KW45B41Z52AFPBT?
KW45B41Z52AFPBT integrates Arm TrustZone-M, a dedicated EdgeLock Secure Enclave with TRDC-based resource isolation, hardware AES-128/192/256, ECC P-256/384, SHA2-256/384, PRINCE flash encryption, and secure boot ROM. These features enable secure key generation, storage, and management - critical for protecting cryptographic keys in automotive access systems.
What package type and dimensions does KW45B41Z52AFPBT use?
KW45B41Z52AFPBT uses a 40-pin HVQFN package (6 × 6 × 0.85 mm, 0.5 mm pitch) with wettable flanks, per NXP package drawing SOT618-13(DD). This compact, automotive-qualified package supports automated optical inspection (AOI) and improves solder joint reliability in high-vibration environments.
KW45B41Z52AFPBT 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)
KW45B41Z52AFPBT FAQ
1.How can I place an order for KW45B41Z52AFPBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z52AFPBT 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 KW45B41Z52AFPBT reliable?
The price and inventory of KW45B41Z52AFPBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z52AFPBT is usually 5 days.
3.What payment methods are accepted for KW45B41Z52AFPBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z52AFPBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z52AFPBT?
KW45B41Z52AFPBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z52AFPBT 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 KW45B41Z52AFPBT?
For technical support, including KW45B41Z52AFPBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z52AFPBT requirements.
6.How does Aetrix verify that KW45B41Z52AFPBT is sourced from the original manufacturer or authorized distributors?
All KW45B41Z52AFPBT 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 KW45B41Z52AFPBT meets industry standards.
7.What is the process for return or replacement of KW45B41Z52AFPBT?
All KW45B41Z52AFPBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z52AFPBT, 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 KW45B41Z52AFPBT part is unused and in its original packaging.
Return procedure for KW45B41Z52AFPBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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