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NXP Semiconductors KW45Z41082AFTBT
- Part No.:
- KW45Z41082AFTBT
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
KW45Z41082AFTBT.pdf
- Description:
- K4W1 HVQFN48
- Quantity:
- Payment:
- Shipping:
Inventory:4,134
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Product details
Overview
KW45Z41082AFTBT from NXP Semiconductors is a secure, automotive-grade wireless MCU featuring an Arm Cortex-M33 core (96 MHz), 1 MB flash / 128 KB SRAM, integrated EdgeLock™ Secure Enclave, and FlexCAN supporting CAN FD per ISO 11898-1 - designed for keyless entry, PEPS, and wireless battery management systems.
For engineers reviewing the KW45Z41082AFTBT datasheet, KW45Z41082AFTBT pinout, KW45Z41082AFTBT application, or KW45Z41082AFTBT equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The KW45Z41082AFTBT implements a dual-core architecture: a 96 MHz Arm Cortex-M33 application core with TrustZone-M, IEEE 754 FPU, DSP extensions, and 8 KB code cache; and a dedicated 64 MHz CM3 radio controller core handling BLE 5.3 link-layer operations. It lacks integrated Bluetooth radio hardware - confirmed by ordering table "non-radio parts" classification and absence of RF transceiver specs in its variant row.
Security is enforced via EdgeLock™ Secure Enclave with hardware AES-128/192/256, ECC P-192–521, SHA2-224/256/384/512, PRINCE on-the-fly flash encryption, and TRDC-based domain isolation. Safety features include SRAM ECC, dual watchdogs, CAC clock accuracy monitoring, and AEC-Q100 Grade 2 qualification (–40 °C to +105 °C ambient).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M33 @ 96 MHz with TrustZone-M, FPU, DSP, MPU, and 8 KB instruction cache - enables deterministic real-time control with secure partitioning for ASIL-B–aligned software stacks. |
| Memory | 1 MB embedded flash (encrypted via PRINCE) + 128 KB SRAM with ECC - supports secure OTA updates and fault-tolerant data logging in automotive environments. |
| CAN Interface | FlexCAN supporting CAN FD (ISO 11898-1) up to 5 Mbps - provides high-bandwidth vehicle network communication without external transceiver for ECU-to-ECU diagnostics and control. |
| Security | EdgeLock™ Secure Enclave with hardware crypto accelerators (AES, ECC, SHA2), TRNG, secure boot ROM, and tamper detection pins - meets UNECE R155 CSMS requirements for secure car access systems. |
| Power Modes | Deep Power-Down mode draws <1.5 μA with RTC active; Smart Power Switch enables <100 nA sleep current - extends battery life in passive entry fobs and WBMS sensor nodes. |
| Qualification | AEC-Q100 Grade 2 (–40 °C to +105 °C ambient), MISRA C:2012 compliant, ASPICE Level 2 process certified - qualifies for under-hood and body-control module deployment. |
Pinout & Package
Package: 48-pin HVQFN (7 × 7 × 0.85 mm), pitch 0.5 mm, wettable flanks - supports automated optical inspection (AOI) and improves solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE | Core domain power supply input | Accepts 1.25–3.6 V; powers Cortex-M33 core and associated logic - requires local 1.1 V LDO regulation for stable operation at 96 MHz. |
| VDD_SYS | System domain power supply input | Supplies PMC, EFUSE, SRTC, and FRO oscillators at 1.8–2.25 V - critical for secure boot sequence and tamper timestamping. |
| CAN_H / CAN_L | Differential CAN FD bus interface | Direct connection to external CAN transceiver (e.g., TJA1044); supports bit rates up to 5 Mbps - eliminates need for level-shifting in standard automotive harnesses. |
| LPUART0_RX / LPUART0_TX | Low-power UART with LIN support | Enables LIN 2.2 slave node communication (e.g., door module diagnostics) while consuming <100 μA in sleep mode - reduces gateway ECU load. |
| PTA0 / PTA1 | GPIO with interrupt and wakeup capability | Configurable as wake-up sources from Deep Power-Down; used for proximity detection in PEPS systems - triggers fast resume within 3 μs. |
Key Features
| Feature | Design Value |
|---|---|
| Secure Boot with Root of Trust | Factory-programmed eFuses and immutable boot ROM enforce authenticated firmware loading - prevents unauthorized code execution in production vehicles. |
| FlexCAN with FD Support | Hardware message filtering, FIFO buffering, and loopback self-test - reduces CPU overhead during high-load CAN traffic in WBMS cell monitoring. |
| Low-Power Timers (LPTMR/LPIT) | Two 32-bit LPTMRs and four-channel LPIT with DMA - enables precise 10 ms periodic wake-up for BLE advertising intervals without waking the main core. |
| EdgeLock™ Secure Enclave | Isolated execution environment with dedicated RAM, crypto engines, and secure debug disable - allows OEMs to host proprietary key management logic without exposing secrets to application firmware. |
| Smart Power Switch | Ultra-low leakage switch with GPIO/timer wake-up - powers down entire peripheral domains (e.g., ADC, comparators) between sensor readings, cutting system idle current to sub-μA levels. |
Applications
| Secure Car Access | Passive Entry/Start (PEPS) |
|---|---|
Use Scenario: Wireless authentication between vehicle and fob during approach or departure. IC Role / Device Role / Timing Role: Main application MCU executing secure challenge-response protocol, managing CAN FD communication with body control module, and controlling low-power wake-up timers. Use Value: Sub-100 nA sleep current extends fob battery life beyond 5 years; EdgeLock™ enclave protects cryptographic keys against physical side-channel attacks. | Use Scenario: Seamless engine start without button press when driver enters cabin with authenticated fob. IC Role / Device Role / Timing Role: Real-time coordinator between LF receiver (external), BLE radio (external), and CAN FD bus - synchronizes timing-critical proximity handshakes within 200 ms window. Use Value: Dual 32-bit LPTMRs enable precise 125 kHz LF field timing and BLE response scheduling - meets ISO 13837 latency requirements. |
| Wireless Battery Management (WBMS) | Building Control Gateway |
Use Scenario: Monitoring voltage, temperature, and state-of-charge across EV battery cells using wireless sensor nodes. IC Role / Device Role / Timing Role: Central node MCU aggregating data via CAN FD from wired BMS slaves and relaying to cloud via external BLE/Wi-Fi module. Use Value: 1 MB flash stores dual firmware images for fail-safe OTA updates; FlexCAN FD handles 5 Mbps cell-voltage streaming without packet loss. | Use Scenario: HVAC and lighting control hub interfacing with legacy BACnet MS/TP devices and modern BLE sensors. IC Role / Device Role / Timing Role: Protocol translator bridging CAN FD (to field controllers) and LPUART/LIN (to thermostats), with secure firmware updates over LPSPI. Use Value: AEC-Q100 Grade 2 rating ensures reliable operation in unconditioned mechanical rooms; SRAM ECC prevents control corruption from cosmic radiation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secure automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| S32K344UAVLLT | 120 MHz Arm Cortex-M7, 4 MB flash, ASIL-D safety certification, no integrated BLE stack support | Targeted at powertrain and chassis control where functional safety exceeds ASIL-B; lacks secure enclave architecture of KW45Z41082AFTBT | Select when ISO 26262 ASIL-D compliance is mandatory and external BLE connectivity is handled by discrete radio IC. |
| MIMXRT685SFFOB | Arm Cortex-M33 @ 600 MHz, 1 MB SRAM, no CAN FD, includes on-die PSRAM but no EdgeLock enclave | Optimized for HMI and edge AI inference; lacks automotive qualification and CAN FD - unsuitable for vehicle network integration | Choose only for non-automotive industrial gateways requiring high compute throughput and external CAN FD transceivers. |
Compared with S32K344UAVLLT and MIMXRT685SFFOB, KW45Z41082AFTBT uniquely balances ASIL-B–ready safety, automotive-grade security (EdgeLock), and native CAN FD - making it optimal for cost-sensitive, battery-powered car access and WBMS edge nodes where radio is offloaded externally.
Availability
KW45Z41082AFTBT is available at Aetrix Electronics and suitable for secure car access systems, passive entry/start (PEPS) modules, and wireless battery management systems requiring stable component supply across multi-year automotive production cycles.
Supply support for KW45Z41082AFTBT 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 automotive qualification.
KW45Z41082AFTBT belongs to the KW45 product family - engineered specifically for secure, low-power automotive wireless control applications where CAN FD integration, AEC-Q100 compliance, and hardware-enforced security are mandatory.
FAQ
Does KW45Z41082AFTBT include an integrated Bluetooth Low Energy radio?
No, KW45Z41082AFTBT is a non-radio MCU variant. Per NXP's ordering tables, it belongs to the "non-radio parts" group and lacks the dedicated CM3 radio core, 256 kB radio flash, and RF transceiver circuitry found in KW45B-series parts. It is intended for use with external BLE modules in systems where RF separation improves EMC robustness.
What is the maximum CAN FD bit rate supported by KW45Z41082AFTBT?
KW45Z41082AFTBT's FlexCAN module supports CAN FD up to 5 Mbps, compliant with ISO 11898-1:2015. This is confirmed in the "Communication interfaces" section and validated by electrical timing specs in Section 3.7.5 of the datasheet - enabling high-speed diagnostics and firmware updates in modern vehicle networks.
How does the EdgeLock™ Secure Enclave in KW45Z41082AFTBT protect firmware updates?
KW45Z41082AFTBT uses EdgeLock™ Secure Enclave to authenticate and decrypt OTA firmware images via hardware-accelerated ECDSA signature verification and AES-GCM decryption. The enclave isolates update processing from the main application core, preventing rollback attacks and ensuring only cryptographically signed images execute - a requirement for UNECE R155 compliance.
Can KW45Z41082AFTBT operate in extended temperature environments required for under-hood automotive applications?
Yes, KW45Z41082AFTBT is AEC-Q100 Grade 2 qualified with an ambient operating range of –40 °C to +105 °C and junction range up to +125 °C. Its DCDC regulator, LDOs, and thermal protection circuits (CAC, watchdogs) are characterized across this full range - meeting requirements for engine bay and transmission control unit deployments.
What package type and pin count does KW45Z41082AFTBT use?
KW45Z41082AFTBT uses a 48-pin HVQFN package (7 × 7 × 0.85 mm, 0.5 mm pitch) with wettable flanks. This is explicitly listed in Table 2 ("Ordering Information of non-radio parts") and confirmed in package drawings SOT619-17(D) - enabling AOI compatibility and high-reliability solder joints in automotive manufacturing.
KW45Z41082AFTBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Kinetis KW45Z
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit
- Speed:
- 96MHz
- Connectivity:
- CANbus, HMI, I2C, SPI, UART/USART
- Peripherals:
- DMA, PWM, WDT
- Number of I/O:
- 29
- Program Memory Size:
- 1MB (1M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 14x16b SAR
- Oscillator Type:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
KW45Z41082AFTBT FAQ
1.How can I place an order for KW45Z41082AFTBT through Aetrix?
Please submit a Request for Quotation (RFQ) for KW45Z41082AFTBT 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 KW45Z41082AFTBT reliable?
The price and inventory of KW45Z41082AFTBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KW45Z41082AFTBT is usually 5 days.
3.What payment methods are accepted for KW45Z41082AFTBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KW45Z41082AFTBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KW45Z41082AFTBT?
KW45Z41082AFTBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KW45Z41082AFTBT 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 KW45Z41082AFTBT?
For technical support, including KW45Z41082AFTBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KW45Z41082AFTBT requirements.
6.How does Aetrix verify that KW45Z41082AFTBT is sourced from the original manufacturer or authorized distributors?
All KW45Z41082AFTBT 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 KW45Z41082AFTBT meets industry standards.
7.What is the process for return or replacement of KW45Z41082AFTBT?
All KW45Z41082AFTBT units undergo pre-shipment inspection (PSI). If there is an issue with KW45Z41082AFTBT, 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 KW45Z41082AFTBT part is unused and in its original packaging.
Return procedure for KW45Z41082AFTBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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