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NXP Semiconductors KW45B41Z52AFTBR
- Part No.:
- KW45B41Z52AFTBR
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z52AFTBR.pdf
- Description:
- IC RF TXRX+MCU BLE 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,389
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Product details
Overview
KW45B41Z52AFTBR from NXP Semiconductors is a low-power, AEC-Q100 Grade 2 qualified wireless MCU integrating an Arm Cortex-M33 core (up to 96 MHz), Bluetooth Low Energy 5.3 radio, and no CAN FD interface. It features 512 KB flash, 128 KB SRAM, TrustZone-M security, EdgeLock™ Secure Enclave, and operates from –40 °C to +105 °C ambient. It targets secure automotive keyless entry and industrial wireless sensor nodes.
For engineers reviewing the KW45B41Z52AFTBR datasheet, KW45B41Z52AFTBR pinout, KW45B41Z52AFTBR application, or KW45B41Z52AFTBR 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 two validated alternative parts for automotive-grade BLE+MCU designs.
Technical Context
The KW45B41Z52AFTBR 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. Its security subsystem includes hardware-accelerated AES-128/192/256, ECDSA, SHA2-256/384, TRNG, and PRINCE-based on-the-fly flash encryption.
It supports Bluetooth LE 5.3 physical layer modes (125 kbps–2 Mbps), achieves –106 dBm sensitivity at 125 kbps Long Range, and delivers programmable TX output up to +10 dBm. The device lacks FlexCAN, distinguishing it from CAN FD-enabled variants like KW45B41Z53AFTBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ up to 96 MHz with TrustZone-M, FPU, DSP, and 8 KB code cache |
| Memory | 512 KB flash (PRINCE-encrypted) + 128 KB SRAM with ECC/parity protection |
| Wireless | Bluetooth LE 5.3 radio: –106 dBm @ 125 kbps LR, +10 dBm max TX, 24 simultaneous connections |
| Security | EdgeLock Secure Enclave with hardware crypto accelerators, TRNG, secure boot ROM, and eFuses |
| Power | 4.7 mA typical RX current; <3 μA in power-down mode with RTC active and 32 KB SRAM retention |
| Temp Range | AEC-Q100 Grade 2 qualified: –40 °C to +105 °C ambient operating temperature |
| Supply | DCDC input: 1.8–3.6 V; Core LDO: 1.25–3.6 V; RF supply: 1.175–3.6 V |
Pinout & Package
Package: 48-pin HVQFN (SOT619-17(D)), 7 mm × 7 mm × 0.85 mm, 0.5 mm pitch, wettable flanks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain power supply | 1.25–3.6 V input to internal LDO_CORE; powers Cortex-M33 core and digital logic |
| VDD_SYS | System domain power supply | 1.8–2.25 V supply for PMC, EFUSE, SRTC, and free-running oscillators |
| VDD_IO_ABC | I/O bank A/B/C power rail | 1.71–3.6 V supply for GPIO ports A–C, Flash, and analog comparators |
| VDD_RF | RF analog supply | 1.175–3.6 V supply for 32 MHz RF oscillator and BLE radio analog circuitry |
| XTAL_RF | RF crystal oscillator input | Connects to 32 MHz fundamental-mode crystal; enables precise BLE timing and frequency stability |
| RESET_b | Active-low reset input | Asynchronous reset signal; asserted low resets all domains including secure enclave and radio subsystem |
| SWD_DIO / SWD_CLK | ARM Serial Wire Debug interface | Two-pin debug port supporting secure programming, boundary scan, and runtime debugging under TrustZone control |
Key Features
| Feature | Design Value |
|---|---|
| BLE 5.3 Long Range | –106 dBm sensitivity at 125 kbps enables >1 km outdoor range in line-of-sight conditions with minimal external components |
| Secure Boot & Debug | Immutable ROM-based boot loader validates signed firmware images and disables insecure debug access unless authorized via secure credential |
| Ultra-Low-Power Modes | Deep Power-Down draws <1.5 μA with RTC active-critical for battery-powered automotive PEPS fobs lasting >5 years |
| On-Chip Balun | Integrated RF balun eliminates discrete matching network, reducing BOM count and PCB area by ≥30% vs. discrete RF front-end solutions |
| PRINCE Flash Encryption | Hardware-accelerated XEX-mode encryption allows encrypted flash storage with zero performance penalty during on-the-fly decryption |
Applications
| Automotive Keyless Entry | Industrial Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered fob communicating with vehicle ECU via BLE to authenticate and unlock doors without physical button press. IC Role / Device Role / Timing Role: Primary BLE+MCU SoC handling cryptographic authentication, RF protocol stack execution, and low-power state management. Use Value: AEC-Q100 Grade 2 qualification ensures reliability at +105 °C under hood; <3 μA power-down current extends fob battery life beyond 5 years. | Use Scenario: Self-powered environmental monitor deployed in factory machinery enclosures measuring temperature, vibration, and humidity. IC Role / Device Role / Timing Role: Integrated MCU executes sensor fusion algorithms while BLE 5.3 Long Range transmits data to gateway up to 1 km away. Use Value: On-chip balun and –106 dBm sensitivity eliminate external RF components; TRNG and AES-256 secure OTA updates against firmware tampering. |
| Passive Entry/Start (PEPS) | Building Access Control |
Use Scenario: Vehicle detects driver proximity via low-duty-cycle BLE advertising and initiates secure handshake for engine start without key insertion. IC Role / Device Role / Timing Role: Real-time BLE responder with sub-100 ms latency, managing secure session keys and low-latency RF wake-up from deep sleep. Use Value: Dual-core architecture isolates radio timing-critical tasks from application logic; EdgeLock enclave protects cryptographic keys from side-channel attacks. | Use Scenario: Smart door reader authenticating mobile credentials via BLE, logging access events, and interfacing with building management system over UART. IC Role / Device Role / Timing Role: Secure BLE endpoint with LIN-capable LPUART for legacy system integration and tamper-detection pins for physical intrusion monitoring. Use Value: Four digital tamper pins with timestamping detect enclosure breaches; secure boot prevents unauthorized firmware modification in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KW45B41Z53AFTBR | Includes FlexCAN supporting CAN FD per ISO 11898-1; identical package, memory, and BLE specs | Required for automotive body control modules needing CAN FD backhaul alongside BLE | Select when CAN FD communication with vehicle bus is mandatory; KW45B41Z52AFTBR omits CAN entirely |
| KW45Z41052AFTBR | MCU-only variant (no BLE radio); same Cortex-M33 core, memory, security, and package | Suitable for wired or proprietary RF systems where BLE is unnecessary or handled externally | Choose to reduce cost and power when BLE functionality is not required; retains full TrustZone and EdgeLock security stack |
Compared with KW45B41Z52AFTBR, KW45B41Z53AFTBR adds CAN FD capability at identical footprint and power envelope, while KW45Z41052AFTBR removes the BLE radio entirely-enabling lower-cost, lower-power implementations where wireless connectivity is offloaded or omitted.
Availability
KW45B41Z52AFTBR is available at Aetrix Electronics and suitable for automotive keyless entry systems, industrial wireless sensor networks, and building access control devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for KW45B41Z52AFTBR 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 is designed as a highly secure, single-chip wireless MCU platform targeting automotive-grade BLE applications such as PEPS and WBMS, with integrated EdgeLock security and AEC-Q100 qualification built-in from silicon inception.
FAQ
Does KW45B41Z52AFTBR support CAN FD communication?
No, KW45B41Z52AFTBR does not include FlexCAN hardware. It is explicitly designated as a non-CAN variant within the KW45 family. Only part numbers ending in "53" (e.g., KW45B41Z53AFTBR) integrate CAN FD compliant with ISO 11898-1. KW45B41Z52AFTBR retains full BLE 5.3, security, and MCU functionality but omits the CAN peripheral entirely.
What is the maximum transmit power of KW45B41Z52AFTBR?
The KW45B41Z52AFTBR supports programmable transmit output power up to +10 dBm across all BLE 5.3 data rates (125 kbps–2 Mbps). This peak output is achieved with VPA_2P4GHz supply at 2.4 V and requires proper RF layout and antenna matching per NXP's reference design AN12422.
Is KW45B41Z52AFTBR qualified for automotive use?
Yes, KW45B41Z52AFTBR is AEC-Q100 Grade 2 qualified, certified for ambient operating temperatures from –40 °C to +105 °C, and compliant with MISRA C:2012 and Automotive SPICE (ASPICE) development processes. Its qualification covers the full device-including BLE radio, Cortex-M33 core, and EdgeLock Secure Enclave.
How much SRAM is available on KW45B41Z52AFTBR, and is it protected?
KW45B41Z52AFTBR includes 128 KB of on-chip SRAM, with full ECC and parity error checking enabled by default. Memory protection is enforced via the Cortex-M33 MPU and TrustZone-M domain isolation, ensuring secure enclave data remains inaccessible to non-secure application code.
What debug interface does KW45B41Z52AFTBR support?
KW45B41Z52AFTBR supports ARM Serial Wire Debug (SWD) via dedicated SWD_DIO and SWD_CLK pins. Debug access is governed by the EdgeLock Secure Enclave: unrestricted debug is disabled by default and requires secure credential provisioning to enable authenticated, TrustZone-aware debugging sessions.
KW45B41Z52AFTBR 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)
KW45B41Z52AFTBR FAQ
1.How can I place an order for KW45B41Z52AFTBR through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z52AFTBR 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 KW45B41Z52AFTBR reliable?
The price and inventory of KW45B41Z52AFTBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z52AFTBR is usually 5 days.
3.What payment methods are accepted for KW45B41Z52AFTBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z52AFTBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z52AFTBR?
KW45B41Z52AFTBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z52AFTBR 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 KW45B41Z52AFTBR?
For technical support, including KW45B41Z52AFTBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z52AFTBR requirements.
6.How does Aetrix verify that KW45B41Z52AFTBR is sourced from the original manufacturer or authorized distributors?
All KW45B41Z52AFTBR 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 KW45B41Z52AFTBR meets industry standards.
7.What is the process for return or replacement of KW45B41Z52AFTBR?
All KW45B41Z52AFTBR units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z52AFTBR, 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 KW45B41Z52AFTBR part is unused and in its original packaging.
Return procedure for KW45B41Z52AFTBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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