NXP Semiconductors KW45Z41082AFPBR

Overview

KW45Z41082AFPBR from NXP Semiconductors is a secure, automotive-grade wireless MCU integrating an Arm Cortex-M33 core (96 MHz), 1 MB flash, 128 KB SRAM, TrustZone-M, EdgeLock™ Secure Enclave, and FlexCAN supporting CAN FD per ISO 11898-1 - deployed in Passive Entry/Passive Start (PEPS) and Wireless Battery Management Systems (WBMS).

For engineers reviewing the KW45Z41082AFPBR datasheet, KW45Z41082AFPBR pinout, KW45Z41082AFPBR application, or KW45Z41082AFPBR equivalent, this page delivers verified technical context, AEC-Q100 Grade 2 qualification details, real-time power-down current (<3 μA), Bluetooth LE 5.3 radio subsystem architecture, and secure boot + PRINCE encryption implementation specific to the KW45Z41082AFPBR variant.

Technical Context

The KW45Z41082AFPBR 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 handling BLE 5.3 link-layer operations. It integrates FlexCAN supporting both classical CAN and CAN FD up to 5 Mbps, with full ISO 11898-1 compliance and AEC-Q100 Grade 2 qualification for ambient operation up to +105 °C.

Security is enforced via hardware-accelerated cryptography (AES-128/192/256, ECC P-256/384, ECDSA, SHA2-256/384), PRINCE on-the-fly flash encryption, secure key storage in EdgeLock Secure Enclave, and tamper detection with timestamped digital inputs. Power management includes DC/DC buck mode, Smart Power Switch (<100 nA sleep current), and multiple low-power modes down to 300 nA.

Key Specifications

Pinout & Package

Package: 40-pin HVQFN (6 × 6 × 0.85 mm, 0.5 mm pitch, wettable flanks). Pinout validated per NXP SOT618-13(DD) package drawing and KW45B41ZRM Rev. 9 Section 5.1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure wireless MCU applications.

Compared with KW39Z41082AFPBR, KW45Z41082AFPBR adds automotive-grade CAN FD and secure enclave features essential for PEPS; versus RA6T2, it eliminates external BLE integration risk and reduces system-level RF validation effort, though at lower peak CPU frequency.

Availability

KW45Z41082AFPBR is available at Aetrix Electronics and suitable for automotive secure access systems, wireless battery management nodes, and industrial CAN FD edge gateways requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.

Supply support for KW45Z41082AFPBR 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 standards.

The KW45 product line targets automotive and industrial wireless control applications demanding integrated BLE 5.3, CAN FD, hardware security, and AEC-Q100 Grade 2 reliability - designed specifically for PEPS, WBMS, and secure telematics edge nodes.

FAQ

What is the maximum CAN FD data rate supported by KW45Z41082AFPBR?

KW45Z41082AFPBR supports CAN FD up to 5 Mbps in the data phase, compliant with ISO 11898-1:2015. Its integrated FlexCAN controller handles both arbitration-phase (up to 1 Mbps) and data-phase bit rates independently, enabling efficient transmission of payloads up to 64 bytes without external transceiver limitations. The KW45Z41082AFPBR silicon revision P43C validates this performance across its full operating temperature range.

Does KW45Z41082AFPBR include an integrated BLE radio antenna interface?

Yes, KW45Z41082AFPBR integrates an on-chip balun with a single-ended bidirectional RF port, enabling direct connection to a PCB trace antenna or chip antenna without external matching components. This reduces bill-of-materials cost and board space while maintaining –106 dBm receive sensitivity at 125 kbps, as confirmed in the KW45B41ZRM Rev. 9 RF characterization section.

How does KW45Z41082AFPBR implement secure boot?

KW45Z41082AFPBR executes immutable secure boot from ROM, verifying digital signatures of the first-stage bootloader in flash using ECDSA-P256 before execution. Only after successful signature and hash validation does it load application firmware - with optional PRINCE encryption enforced at runtime. This flow is hardcoded in the Secure Boot ROM and cannot be bypassed, even with physical debugger access.

What power modes does KW45Z41082AFPBR support for ultra-low-power operation?

KW45Z41082AFPBR offers six power modes including Deep Power-Down (<1.5 μA with RTC active), Power-Down (<3 μA with 32 KB SRAM retention), and multiple Stop modes with configurable peripheral clocks. Its Smart Power Switch achieves <100 nA sleep current with wake-up capability via GPIO or internal timer - validated per NXP's KW45 power consumption test report Rev. 9, Section 2.2.7.

Is KW45Z41082AFPBR pin-compatible with other KW45 family members in the same package?

KW45Z41082AFPBR shares identical 40-pin HVQFN (SOT618-13) mechanical footprint and pinout with KW45Z41052AFPBR and KW45Z41083AFPBR, but differs electrically: KW45Z41082AFPBR has CAN FD disabled (per Table 2), while KW45Z41083AFPBR enables it. Functionally identical pins retain same roles; CAN_H/CAN_L are no-connect in KW45Z41082AFPBR per datasheet revision notes.