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NXP Semiconductors KW45B41Z83AFTBT
- Part No.:
- KW45B41Z83AFTBT
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z83AFTBT.pdf
- Description:
- IC RF TXRX+MCU BLE 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,200
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Product details
Overview
KW45B41Z83AFTBT from NXP Semiconductors is a secure, automotive-grade wireless MCU integrating an Arm Cortex-M33 core (96 MHz), 1 MB flash/128 KB SRAM, Bluetooth LE 5.3 radio, and FlexCAN supporting CAN FD per ISO 11898-1 - deployed in Passive Entry/Passive Start (PEPS) systems and Wireless Battery Management Systems (WBMS).
For engineers reviewing the KW45B41Z83AFTBT datasheet, KW45B41Z83AFTBT pinout, KW45B41Z83AFTBT application, or KW45B41Z83AFTBT equivalent, key selection considerations include AEC-Q100 Grade 2 qualification, EdgeLock™ Secure Enclave with PRINCE encryption, –106 dBm LR receive sensitivity, 7×7 mm 48-pin HVQFN wettable flank package, and dual-domain power management enabling <3 μA power-down current with RTC active.
Technical Context
The KW45B41Z83AFTBT implements a dual-core architecture: a 96 MHz Arm Cortex-M33 application core with TrustZone-M, 8 KB code cache, and IEEE 754 FPU; plus a dedicated 64 MHz CM3 radio controller running the BLE 5.3 link layer. It integrates a full-featured FlexCAN module compliant with CAN FD data rates up to 5 Mbps and ISO 11898-1 physical layer requirements.
Security is enforced via EdgeLock™ Secure Enclave with hardware-accelerated AES-128/256, ECC P-256/384, SHA2-256/512, TRNG, and PRINCE on-the-fly flash decryption. Power management includes DCDC buck regulator, Core/SYS LDOs, and Smart Power Switch delivering <100 nA sleep current with GPIO/timer wake-up capability.
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 for deterministic real-time execution and secure domain isolation |
| Memory | 1 MB embedded flash (PRINCE-encrypted, on-the-fly decrypted) + 128 KB SRAM with ECC for safety-critical data integrity |
| Wireless | Bluetooth LE 5.3 radio with –106 dBm 125 kbps Long Range sensitivity, +10 dBm programmable TX power, and 24 simultaneous connections |
| CAN Interface | FlexCAN supporting CAN FD up to 5 Mbps, fully compliant with ISO 11898-1, including bit-rate switching and CRC protection |
| Security | EdgeLock™ Secure Enclave with hardware crypto accelerators (AES, ECC, SHA2), TRNG, secure boot ROM, and tamper detection on four pins |
| Power | <3 μA in power-down mode with RTC active and 32 KB SRAM retention; <100 nA Smart Power Switch sleep current with wake-up from GPIO or timer |
| Qualification | AEC-Q100 Grade 2 (–40 °C to +105 °C ambient), MISRA C:2012 and ASPICE-compliant development process |
Pinout & Package
Package: 48-pin HVQFN (7 × 7 × 0.85 mm), 0.5 mm pitch, wettable flanks - optimized for automotive reflow inspection and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain supply input | Accepts 1.25–3.6 V; powers Cortex-M33 core, cache, and security subsystem - requires stable low-noise regulation |
| VDD_SYS | System domain supply input | Supplies PMC, EFUSE, SRTC, and FRO oscillators at 1.8–2.25 V; enables fuse programming at 2.75 V (limited duration) |
| VDD_DCDC | DCDC regulator input | 1.8–3.6 V input for integrated buck converter; supports bypass mode when external 1.2 V rail is available |
| CAN_H / CAN_L | Differential CAN FD bus interface | Direct connection to ISO 11898-1-compliant transceiver; supports data rates up to 5 Mbps with bit-rate switching |
| RF_IN / RF_OUT | Single-ended RF port with integrated balun | Connects to external antenna via 50 Ω trace; eliminates discrete balun requirement and reduces BOM count |
| SWD_DIO / SWD_CLK | ARM Serial Wire Debug interface | Enables secure debug access under TrustZone-M control; supports boundary scan and flash programming during development |
Key Features
| Feature | Design Value |
|---|---|
| EdgeLock™ Secure Enclave | Hardware-isolated domain providing secure boot, key storage, cryptographic acceleration (AES/ECC/SHA), and tamper response - eliminates need for external secure element in PEPS/WBMS |
| FlexCAN with CAN FD | Full ISO 11898-1 implementation supporting 5 Mbps data phase, automatic retransmission, and error confinement - meets AUTOSAR CAN Driver requirements |
| BLE 5.3 Long Range | –106 dBm sensitivity at 125 kbps enables >200 m line-of-sight range in WBMS node-to-gateway links with minimal RF front-end cost |
| Smart Power Switch | Ultra-low-leakage switch with <100 nA sleep current and configurable wake sources - extends battery life in always-on vehicle access nodes |
| PRINCE Flash Encryption | On-the-fly XEX-mode decryption of encrypted flash contents using factory-programmed keys - protects proprietary algorithms and calibration data from extraction |
Applications
| Secure Car Access | Keyless Entry |
|---|---|
Use Scenario: Vehicle proximity detection and authentication using encrypted challenge-response handshake between fob and ECU. IC Role / Device Role / Timing Role: KW45B41Z83AFTBT serves as the secure BLE/CAN FD gateway, executing cryptographic operations in EdgeLock enclave and relaying commands via CAN FD to body control module. Use Value: Enables sub-100 ms unlock latency with FIPS 140-2 Level 3-aligned key management and resistance to relay attacks via distance-bounding protocols. | Use Scenario: Low-power door handle sensor activation triggering authenticated BLE connection and door latch actuation. IC Role / Device Role / Timing Role: KW45B41Z83AFTBT operates in ultra-low-power mode (<3 μA), wakes on capacitive touch interrupt, and initiates secure BLE pairing within 150 ms. Use Value: Achieves >10-year coin-cell battery life while maintaining instant responsiveness and cryptographic session resumption across multiple doors. |
| Passive Entry/Start (PEPS) | Wireless BMS (WBMS) |
Use Scenario: Seamless vehicle entry and engine start without user interaction, using multi-antenna field mapping and secure rolling code validation. IC Role / Device Role / Timing Role: KW45B41Z83AFTBT acts as central PEPS controller, coordinating LF wakeup (125 kHz), BLE authentication, and CAN FD command issuance to immobilizer and ignition modules. Use Value: Supports ISO 21805-compliant distance bounding and meets UNECE R100 cybersecurity requirements for vehicle access systems. | Use Scenario: Real-time cell voltage, temperature, and SOC monitoring across 12S battery packs with wireless telemetry to master BMS controller. IC Role / Device Role / Timing Role: KW45B41Z83AFTBT functions as slave node MCU, acquiring ADC samples (16-bit, 2 Msps), encrypting data in EdgeLock enclave, and transmitting via BLE Long Range to gateway. Use Value: Eliminates high-voltage isolation barriers and wiring harnesses while maintaining ASIL-B functional safety compliance through SRAM ECC and watchdog supervision. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP KW45B41Z53AFTBT | 512 KB flash (vs. 1 MB), identical 48-pin HVQFN package, same BLE 5.3/CAN FD/EdgeLock features and AEC-Q100 Grade 2 rating | Suitable for cost-sensitive PEPS nodes where firmware footprint <512 KB; lacks headroom for future OTA feature expansion | Select when memory budget is constrained and no planned feature growth beyond initial release |
| Renesas RA4W1 | BLE 5.0 only (no CAN FD), 1 MB flash/256 KB SRAM, no hardware secure enclave (TrustZone only), no AEC-Q100 qualification | Applicable in industrial IoT gateways requiring BLE-to-Cloud bridging but not automotive CAN FD or certified security | Choose for non-automotive, lower-security industrial edge nodes where CAN FD integration is unnecessary |
Compared with KW45B41Z53AFTBT, the KW45B41Z83AFTBT provides double flash capacity for complex OTA update staging and cryptographic key rotation, while the Renesas RA4W1 lacks both CAN FD and AEC-Q100 qualification - making KW45B41Z83AFTBT the only option meeting full automotive PEPS/WBMS system requirements.
Availability
KW45B41Z83AFTBT is available at Aetrix Electronics and suitable for automotive secure access systems, wireless battery management, and industrial CAN FD edge nodes requiring stable component supply across extended product lifecycles.
Supply support for KW45B41Z83AFTBT 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 MCU, RF, and embedded security IP.
The KW45 product family 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 reliability - targeting PEPS, WBMS, and smart sensor gateway use cases.
FAQ
What is the maximum operating temperature range for KW45B41Z83AFTBT?
KW45B41Z83AFTBT is AEC-Q100 Grade 2 qualified with an ambient operating temperature range of –40 °C to +105 °C and junction temperature support up to +125 °C. This rating enables deployment in engine bay proximity, under-hood ECUs, and other thermally demanding automotive locations where sustained high-temperature operation is required. The device maintains full BLE 5.3 and CAN FD functionality across this entire range.
Does KW45B41Z83AFTBT support over-the-air (OTA) firmware updates?
Yes, KW45B41Z83AFTBT supports secure OTA firmware updates via its integrated BLE 5.3 stack and EdgeLock™ Secure Enclave. The secure boot ROM validates digital signatures of new firmware images before execution, while PRINCE flash encryption ensures confidentiality during transmission and storage. OTA updates can be performed with zero downtime using dual-bank flash layout and atomic swap mechanisms implemented in the secure bootloader.
What CAN FD data rates does KW45B41Z83AFTBT support?
KW45B41Z83AFTBT's FlexCAN module supports full CAN FD operation per ISO 11898-1, including arbitration phase up to 1 Mbps and data phase up to 5 Mbps with bit-rate switching. It implements all mandatory CAN FD features: extended data length (up to 64 bytes), CRC21 for data field protection, and automatic protocol handling - enabling high-throughput diagnostics and firmware updates in modern vehicle networks.
How is security enforced in KW45B41Z83AFTBT for automotive applications?
KW45B41Z83AFTBT enforces security through Arm TrustZone-M for software domain isolation, a hardware-isolated EdgeLock™ Secure Enclave with dedicated crypto accelerators (AES-256, ECC P-384, SHA2-512), TRNG, and tamper detection on four dedicated pins. Factory-programmed root keys and PRINCE flash encryption protect firmware and keys. This architecture satisfies UNECE R155/R156 cybersecurity management system (CSMS) requirements for vehicle access and BMS applications.
What is the RF receive sensitivity of KW45B41Z83AFTBT at 2 Mbps?
KW45B41Z83AFTBT achieves –95 dBm receiver sensitivity at 2 Mbps data rate in standard BLE mode. This value is measured under typical conditions (25 °C, 3.3 V supply) and enables robust short-range communication in electrically noisy automotive environments. Combined with –106 dBm Long Range sensitivity at 125 kbps, the device supports adaptive data rate selection to optimize range versus throughput based on link quality.
KW45B41Z83AFTBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- Kinetis KW45B
- Package/Case:
- 48-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:
- 1MB 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)
KW45B41Z83AFTBT FAQ
1.How can I place an order for KW45B41Z83AFTBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z83AFTBT 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 KW45B41Z83AFTBT reliable?
The price and inventory of KW45B41Z83AFTBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z83AFTBT is usually 5 days.
3.What payment methods are accepted for KW45B41Z83AFTBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z83AFTBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z83AFTBT?
KW45B41Z83AFTBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z83AFTBT 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 KW45B41Z83AFTBT?
For technical support, including KW45B41Z83AFTBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z83AFTBT requirements.
6.How does Aetrix verify that KW45B41Z83AFTBT is sourced from the original manufacturer or authorized distributors?
All KW45B41Z83AFTBT 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 KW45B41Z83AFTBT meets industry standards.
7.What is the process for return or replacement of KW45B41Z83AFTBT?
All KW45B41Z83AFTBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z83AFTBT, 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 KW45B41Z83AFTBT part is unused and in its original packaging.
Return procedure for KW45B41Z83AFTBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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