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NXP Semiconductors KW45B41Z53AFTBT
- Part No.:
- KW45B41Z53AFTBT
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z53AFTBT.pdf
- Description:
- IC RF TXRX+MCU BLE 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,274
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Product details
Overview
KW45B41Z53AFTBT from NXP Semiconductors is a single-chip, AEC-Q100 Grade 2 qualified 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. It features 512 KB flash, 128 KB SRAM, EdgeLock™ Secure Enclave, and operates from –40 °C to +105 °C ambient - deployed in automotive secure car access and industrial wireless battery management systems.
For engineers reviewing the KW45B41Z53AFTBT datasheet, KW45B41Z53AFTBT pinout, KW45B41Z53AFTBT application, or KW45B41Z53AFTBT equivalent, this page delivers verified technical context, exact package mapping (48-pin HVQFN, 7×7 mm, wettable flanks), real-world power metrics (4.7 mA RX, <3 μA power-down), and validated automotive-grade security architecture including TrustZone-M and PRINCE encryption.
Technical Context
The KW45B41Z53AFTBT implements a dual-core architecture: a 96 MHz Arm Cortex-M33 application core with TrustZone-M, IEEE 754 FPU, and 8 KB code cache; and a dedicated 64 MHz CM3 radio core managing BLE 5.3 link layer with up to 24 simultaneous connections. Its integrated FlexCAN controller supports full CAN FD operation (up to 5 Mbps) compliant with ISO 11898-1, while the EdgeLock Secure Enclave provides hardware-accelerated AES-128/256, ECC, SHA2, and secure key storage.
Power management includes a DC/DC buck regulator (1.8–3.6 V input), Core_LDO and SYS_LDO regulators, and ultra-low-leakage Smart Power Switch (<100 nA sleep current). Clocking combines 32 MHz RF crystal, 32.768 kHz RTC oscillator, and internal FROs (192 MHz, 6 MHz, 32 kHz, 16 kHz) with CAC-based frequency accuracy monitoring.
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 optional), 128 KB SRAM with ECC/parity support |
| Wireless | BLE 5.3 radio: –106 dBm sensitivity @ 125 kbps, +10 dBm TX output, 24 concurrent connections |
| CAN Interface | FlexCAN supporting CAN FD up to 5 Mbps, ISO 11898-1 compliant, AEC-Q100 Grade 2 qualified |
| Security | EdgeLock Secure Enclave with AES-128/192/256, ECC NIST P-256/384, SHA2-256/384, TRNG, secure boot ROM |
| Power | 4.7 mA typical RX current (3.3 V), <3 μA power-down with RTC active and 32 KB SRAM retention |
| Package | 48-pin HVQFN (7 × 7 × 0.85 mm), 0.5 mm pitch, wettable flanks, RoHS-compliant |
Pinout & Package
Package: 48-pin HVQFN (SOT619-17(D)), 7 mm × 7 mm × 0.85 mm, 0.5 mm pitch, wettable flanks - optimized for automotive reflow inspection and thermal performance in high-reliability applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain supply | 1.25–3.6 V input to LDO_CORE; powers Cortex-M33 core and digital logic |
| VDD_SYS | System domain supply | 1.8–2.25 V for PMC, EFUSE, SRTC, and FRO oscillators |
| VDD_IO_ABC | I/O bank A/B/C supply | 1.71–3.6 V for GPIO, ADC, DAC, CMP, and flash interface |
| VDD_RF | RF analog supply | 1.175–3.6 V for 32 MHz RF oscillator and BLE transceiver analog blocks |
| PTA0 / CAN0_RX | FlexCAN receive input | Dedicated CAN FD physical-layer receiver pin; supports ISO 11898-1 differential signaling |
| PTA1 / CAN0_TX | FlexCAN transmit output | Active-high CAN FD transmitter driving external transceiver; requires external CAN bus termination |
| RF_IN / RF_OUT | Single-ended RF port | Integrated balun enables direct connection to PCB antenna or matching network; no external balun required |
| SWD_DIO / SWD_CLK | Debug interface | 2-pin Serial Wire Debug (SWD) for secure programming and JTAG-less debug access via TrustZone-protected path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualification | Validated for automotive ambient temperatures up to +105 °C and junction up to +125 °C |
| On-the-fly PRINCE decryption | Enables encrypted flash storage with zero-latency runtime decryption using XEX block cipher mode |
| Secure Over-the-Air (OTA) updates | EdgeLock Enclave validates firmware signatures and enforces secure boot policy before execution |
| Ultra-low-power Smart Power Switch | Provides <100 nA sleep current with wake-up via GPIO or internal timer - critical for battery-powered WBMS nodes |
| Hardware crypto accelerators | Dedicated AES, ECC, SHA2, and Poly1305 engines offload CPU and ensure deterministic timing for safety-critical protocols |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Wireless authentication between vehicle ECU and fob during approach or door handle touch. IC Role / Device Role / Timing Role: KW45B41Z53AFTBT acts as the secure BLE 5.3 endpoint with CAN FD gateway, handling cryptographic challenge-response and forwarding authenticated commands over CAN FD to body control module. Use Value: Meets ISO 21434 cybersecurity requirements via EdgeLock Enclave, enabling certified secure key exchange and tamper-resistant session key storage. | Use Scenario: Seamless engine start without physical key insertion, triggered by proximity detection and authenticated handshake. IC Role / Device Role / Timing Role: KW45B41Z53AFTBT serves as the low-latency, dual-role node - BLE initiator for ranging and CAN FD responder for immobilizer command relay - with sub-100 ms end-to-end latency. Use Value: Dual-core architecture isolates BLE timing-critical radio stack from CAN FD message scheduling, ensuring deterministic response under concurrent wireless and bus traffic. |
| Wireless Battery Management (WBMS) | Industrial Positioning/Localization |
Use Scenario: Cell voltage, temperature, and SOC telemetry collection from EV battery packs using wireless sensor nodes. IC Role / Device Role / Timing Role: KW45B41Z53AFTBT functions as the edge node MCU with BLE 5.3 long-range mode (–106 dBm sensitivity) and CAN FD interface to master BMS controller. Use Value: <3 μA power-down current with RTC and 32 KB SRAM retention enables multi-year battery life in sealed sensor modules without compromising wake-up responsiveness. | Use Scenario: Indoor asset tracking using BLE angle-of-arrival (AoA) or time-of-flight (ToF) with synchronized anchor nodes. IC Role / Device Role / Timing Role: KW45B41Z53AFTBT operates as synchronized BLE anchor with precise 32.768 kHz RTC and signal frequency analyzer (SFA) for timestamp calibration across distributed nodes. Use Value: Integrated SFA module measures clock drift against reference signals, enabling sub-microsecond timestamp alignment without external timing infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU with CAN FD applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MKW41Z64VHT4 | BLE 4.2 only; no CAN FD; 64 KB flash; 16 KB RAM; no EdgeLock Enclave or TrustZone-M | Limited to legacy BLE automotive diagnostics; lacks ISO 11898-1 FD compliance and cryptographic acceleration | Select only for cost-sensitive non-safety applications where BLE 5.3 features and CAN FD bandwidth are unnecessary |
| S32K344UAA | ARM Cortex-M7; CAN FD + Ethernet; no integrated BLE radio; 4 MB flash; 512 KB RAM; S32G-level security | Requires external BLE module; suited for gateway-tier ECUs rather than compact sensor nodes | Choose when system architecture separates radio and main MCU, and higher compute throughput is needed for ASIL-B software stacks |
Compared with MKW41Z64VHT4 and S32K344UAA, KW45B41Z53AFTBT uniquely integrates BLE 5.3 + CAN FD + EdgeLock security in a single AEC-Q100 Grade 2 package - eliminating inter-chip latency, reducing BOM count, and enabling certified secure wireless-to-bus bridging in space-constrained automotive sensors.
Availability
KW45B41Z53AFTBT is available at Aetrix Electronics and suitable for automotive secure access systems, wireless battery management, and industrial positioning requiring stable component supply with automotive-grade lifecycle assurance.
Supply support for KW45B41Z53AFTBT 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 ARM-based MCUs and wireless SoCs.
KW45B41Z53AFTBT belongs to the KW45 product family - engineered specifically for automotive and industrial edge nodes demanding integrated BLE 5.3, CAN FD, and hardware-enforced security in a single AEC-Q100 qualified device.
FAQ
What is the maximum operating temperature for KW45B41Z53AFTBT?
KW45B41Z53AFTBT is AEC-Q100 Grade 2 qualified with an ambient operating temperature range of –40 °C to +105 °C and a junction temperature limit of +125 °C. This rating is validated across all functional modes including BLE transmission at +10 dBm and concurrent CAN FD communication, making it suitable for under-hood and cabin-mounted automotive modules.
Does KW45B41Z53AFTBT support CAN FD data rates above 1 Mbps?
Yes, KW45B41Z53AFTBT's FlexCAN module supports full CAN FD operation up to 5 Mbps in the data phase, compliant with ISO 11898-1. The controller handles both classic CAN and CAN FD frames, with programmable bit timing and automatic protocol arbitration - enabling high-throughput diagnostics and firmware updates in modern vehicle networks.
How does the EdgeLock Secure Enclave in KW45B41Z53AFTBT protect firmware updates?
The EdgeLock Secure Enclave in KW45B41Z53AFTBT validates digital signatures of OTA firmware images using ECDSA-P256 before decryption and execution. It enforces secure boot policy, isolates key storage from the application core, and leverages hardware AES-GCM to authenticate and decrypt payloads - preventing unauthorized or corrupted code execution even if the Cortex-M33 core is compromised.
What is the RF interface configuration for KW45B41Z53AFTBT?
KW45B41Z53AFTBT uses a single-ended, bidirectional RF port with an integrated balun, supporting direct connection to PCB antennas or 50 Ω matching networks. No external balun is required. The RF_IN/RF_OUT pin operates in the 2.4 GHz ISM band and is optimized for BLE 5.3 modulation schemes including GFSK and MSK at data rates up to 2 Mbps.
Is KW45B41Z53AFTBT pin-compatible with other members of the KW45 family?
KW45B41Z53AFTBT uses the 48-pin HVQFN (7×7 mm) package with wettable flanks, which is mechanically and electrically compatible with other 48-pin KW45B and KW45Z variants (e.g., KW45B41Z83AFTBT, KW45Z41053AFTBT). Pin functions are consistent across the 48-pin footprint, though memory size and CAN FD enablement differ by part number - enabling scalable design reuse.
KW45B41Z53AFTBT 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:
- 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)
KW45B41Z53AFTBT FAQ
1.How can I place an order for KW45B41Z53AFTBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z53AFTBT 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 KW45B41Z53AFTBT reliable?
The price and inventory of KW45B41Z53AFTBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z53AFTBT is usually 5 days.
3.What payment methods are accepted for KW45B41Z53AFTBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z53AFTBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z53AFTBT?
KW45B41Z53AFTBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z53AFTBT 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 KW45B41Z53AFTBT?
For technical support, including KW45B41Z53AFTBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z53AFTBT requirements.
6.How does Aetrix verify that KW45B41Z53AFTBT is sourced from the original manufacturer or authorized distributors?
All KW45B41Z53AFTBT 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 KW45B41Z53AFTBT meets industry standards.
7.What is the process for return or replacement of KW45B41Z53AFTBT?
All KW45B41Z53AFTBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z53AFTBT, 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 KW45B41Z53AFTBT part is unused and in its original packaging.
Return procedure for KW45B41Z53AFTBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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