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NXP Semiconductors KW45B41Z52AFTBT
- Part No.:
- KW45B41Z52AFTBT
- Manufacturer:
- NXP Semiconductors
- Category:
- RF Transceiver ICs
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45B41Z52AFTBT.pdf
- Description:
- IC RF TXRX+MCU BLE 48HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,157
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Product details
Overview
KW45B41Z52AFTBT from NXP Semiconductors is a low-power, AEC-Q100 Grade 2 qualified wireless MCU integrating an Arm Cortex-M33 core (up to 96 MHz), 512 KB flash, 128 KB SRAM, Bluetooth Low Energy 5.3 radio, and TrustZone-M security architecture - designed for secure automotive access systems including Passive Entry/Passive Start (PEPS) and Wireless Battery Management Systems (WBMS).
For engineers reviewing the KW45B41Z52AFTBT datasheet, KW45B41Z52AFTBT pinout, KW45B41Z52AFTBT application, or KW45B41Z52AFTBT equivalent, key selection considerations include its 48-pin HVQFN wettable flank package, absence of integrated FlexCAN (no CAN FD support), -106 dBm BLE receive sensitivity at 125 kbps, 4.7 mA RX current, and EdgeLock™ Secure Enclave with AES-256 and ECC-521 cryptographic acceleration.
Technical Context
The KW45B41Z52AFTBT 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 running the BLE 5.3 stack. It features hardware-accelerated cryptography via EdgeLock Secure Enclave, including PRINCE flash encryption, AES-256/GCM, ECDSA, and SHA2-512.
Power management includes DC/DC buck regulator (1.8–3.6 V), Core/SYS LDOs, ultra-low leakage Smart Power Switch (<100 nA sleep current), and multiple power-down modes - enabling sub-3 μA operation with RTC active and 32 KB SRAM retention. No FlexCAN peripheral is present, distinguishing it from CAN-enabled variants like KW45B41Z53AFTBT.
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 + 128 KB SRAM; flash supports optional PRINCE XEX on-the-fly decryption |
| BLE Radio | Bluetooth LE 5.3 compliant; –106 dBm sensitivity @ 125 kbps; +10 dBm max TX power; 24 simultaneous connections |
| Security | EdgeLock Secure Enclave with AES-128/192/256, ECC-P521/Curve25519, ECDSA, SHA2-512, TRNG, and secure boot ROM |
| Power | <5.3 mA active core current @ 96 MHz; 4.7 mA typical RX current; <3 μA power-down with RTC + 32 KB SRAM retention |
| Qualification | AEC-Q100 Grade 2 (–40 °C to +105 °C ambient); MISRA C:2012 and ASPICE compliant |
| Package | 48-pin HVQFN (7 × 7 × 0.85 mm, 0.5 mm pitch) with wettable flanks for automated optical inspection |
Pinout & Package
Package: 48-pin HVQFN (7 × 7 × 0.85 mm, 0.5 mm pitch), wettable flanks - optimized for automotive reflow and AOI validation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain supply | 1.2 V nominal input to LDO_CORE; supports 1.25–3.6 V range for flexible power design |
| VDD_SYS | System domain supply | 1.8–2.25 V supply for PMC, EFUSE, SRTC, and FRO oscillators; fuse programming requires 2.75 V |
| VDD_IO_ABC | I/O bank A/B/C supply | 1.71–3.6 V rail powering GPIO, ADC, DAC, and comparators; VIH/VIL referenced to this voltage |
| VDD_RF | RF analog supply | 1.175–3.6 V supply for 32 MHz RF oscillator and BLE transceiver analog blocks |
| XTAL32M | RF crystal input | Differential 32 MHz crystal connection for BLE radio timing; requires external 12 pF load capacitors |
| ANT | RF antenna port | Single-ended 50 Ω RF output with integrated balun; ESD rating ±250 V (CDM) |
| SWD_DIO / SWD_CLK | Debug interface | Two-pin Serial Wire Debug interface supporting secure debug authentication and trace |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot & Debug | Immutable boot ROM validates signed firmware images; debug access restricted by TrustZone-M and TRDC policy |
| Hardware Crypto Acceleration | Dedicated engines for AES-256-GCM, ECDSA-P521, SHA2-512, and Poly1305 - offloading CPU for OTA update integrity |
| Low-Power Radio Operation | 4.7 mA RX and 4.6 mA TX @ 0 dBm enable multi-year battery life in PEPS fob applications |
| Smart Power Switch | Ultra-low leakage switch with <100 nA sleep current and GPIO/timer wake-up - ideal for always-on sensor nodes |
| Automotive Qualification | AEC-Q100 Grade 2 qualification with full temperature derating, ESD (±2000 V HBM), and latch-up immunity (Class II @ 125 °C) |
Applications
| Secure Keyless Entry | Wireless BMS Node |
|---|---|
Use Scenario: Vehicle proximity detection and encrypted challenge-response authentication between fob and vehicle ECU. IC Role / Device Role / Timing Role: Primary BLE 5.3 endpoint executing secure pairing, encrypted payload transmission, and low-latency response timing. Use Value: Sub-106 dBm receive sensitivity enables reliable 3–5 m detection range; TrustZone-M isolates crypto keys from application firmware. | Use Scenario: Distributed cell voltage/temperature sensing node communicating wirelessly to BMS master over BLE mesh. IC Role / Device Role / Timing Role: Autonomous sensor aggregator with real-time clock-triggered sampling and secure OTA firmware updates. Use Value: 32 KB SRAM retention in power-down mode preserves calibration data; PRINCE encryption protects battery algorithm IP. |
| Industrial Asset Tracking | Smart Building Access Panel |
Use Scenario: Battery-powered indoor localization beacon using BLE Angle of Arrival (AoA) with periodic position reporting. IC Role / Device Role / Timing Role: BLE transmitter with precise 32.768 kHz RTC synchronization for time-of-flight measurements. Use Value: 24 simultaneous BLE connections support multi-antenna receiver coordination; low 300 nA deep-sleep current extends 10+ year battery life. | Use Scenario: Secure door lock controller validating credentials via BLE and driving motor actuator with tamper detection. IC Role / Device Role / Timing Role: Root-of-trust anchor managing credential storage, secure boot, and four digital tamper pin inputs with timestamping. Use Value: Four dedicated tamper pins with microsecond timestamping detect physical intrusion attempts; EdgeLock enclave stores keys in eFuses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wireless MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KW45B41Z53AFTBT | Includes FlexCAN supporting ISO 11898-1 CAN FD; identical package, memory, and BLE specs | Required for automotive gateway or ECU bridging BLE to CAN bus; not suitable if CAN is unused | Select when CAN FD communication with vehicle network is mandatory |
| KW45Z41052AFTBT | MCU-only variant (no BLE radio); same Cortex-M33 core, memory, security, and package | Used where BLE is handled externally (e.g., companion radio IC); eliminates RF layout complexity and certification cost | Select when system already includes dedicated BLE radio or requires deterministic real-time MCU performance without RF interference |
Compared with KW45B41Z52AFTBT, KW45B41Z53AFTBT adds CAN FD capability at no trade-off in BLE or security performance, while KW45Z41052AFTBT removes the radio entirely - offering higher deterministic processing headroom and simplified regulatory compliance for non-radio embedded control tasks.
Availability
KW45B41Z52AFTBT is available at Aetrix Electronics and suitable for secure automotive access systems, wireless battery management nodes, industrial asset tracking beacons, and smart building access panels requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for KW45B41Z52AFTBT 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 automotive, industrial, and IoT edge applications, delivering secure, energy-efficient processors and connectivity solutions.
The KW45 product family targets automotive-grade wireless MCUs for secure car access and WBMS, combining BLE 5.3, EdgeLock security, and AEC-Q100 qualification in a single die - eliminating external security co-processors and reducing BOM count.
FAQ
Does KW45B41Z52AFTBT support CAN FD communication?
No, KW45B41Z52AFTBT does not integrate FlexCAN. Its ordering code "52" explicitly denotes the CAN-disabled variant within the KW45B series. For CAN FD support, select KW45B41Z53AFTBT or KW45B41Z83AFTBT - both feature full ISO 11898-1 compliant CAN and CAN FD controllers.
What is the maximum BLE transmit power supported by KW45B41Z52AFTBT?
KW45B41Z52AFTBT supports programmable BLE transmit output power up to +10 dBm. This is achieved using its integrated 2.4 GHz power amplifier with VPA_2P4GHz supply rail (0.9–2.4 V). Output power is software-configurable in discrete steps and calibrated per unit during factory test.
Is KW45B41Z52AFTBT qualified for automotive use?
Yes, KW45B41Z52AFTBT is AEC-Q100 Grade 2 qualified, rated for ambient operating temperatures from –40 °C to +105 °C and junction temperatures up to +125 °C. It also complies with MISRA C:2012 coding standards and Automotive SPICE (ASPICE) development processes.
How does the EdgeLock Secure Enclave in KW45B41Z52AFTBT protect firmware?
The EdgeLock Secure Enclave in KW45B41Z52AFTBT enables optional PRINCE XEX block cipher encryption of flash contents, with on-the-fly decryption during execution. This prevents extraction of sensitive algorithms or keys from read-out flash dumps, while secure boot ROM validates digital signatures of all firmware images before execution.
What package type and dimensions does KW45B41Z52AFTBT use?
KW45B41Z52AFTBT uses a 48-pin HVQFN package (SOT619-17(D)) measuring 7 mm × 7 mm × 0.85 mm with 0.5 mm pitch and wettable flanks. This package supports automated optical inspection (AOI) and meets JEDEC moisture sensitivity level 3 (MSL3) requirements.
KW45B41Z52AFTBT 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)
KW45B41Z52AFTBT FAQ
1.How can I place an order for KW45B41Z52AFTBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45B41Z52AFTBT 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 KW45B41Z52AFTBT reliable?
The price and inventory of KW45B41Z52AFTBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45B41Z52AFTBT is usually 5 days.
3.What payment methods are accepted for KW45B41Z52AFTBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45B41Z52AFTBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45B41Z52AFTBT?
KW45B41Z52AFTBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45B41Z52AFTBT 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 KW45B41Z52AFTBT?
For technical support, including KW45B41Z52AFTBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45B41Z52AFTBT requirements.
6.How does Aetrix verify that KW45B41Z52AFTBT is sourced from the original manufacturer or authorized distributors?
All KW45B41Z52AFTBT 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 KW45B41Z52AFTBT meets industry standards.
7.What is the process for return or replacement of KW45B41Z52AFTBT?
All KW45B41Z52AFTBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45B41Z52AFTBT, 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 KW45B41Z52AFTBT part is unused and in its original packaging.
Return procedure for KW45B41Z52AFTBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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