NXP Semiconductors KW45Z41053AFTBT

Overview

KW45Z41053AFTBT from NXP Semiconductors is a secure, AEC-Q100 Grade 2 qualified wireless MCU without integrated Bluetooth radio, featuring a 96 MHz Arm Cortex-M33 core, 512 KB flash, 128 KB SRAM, TrustZone-M security, and FlexCAN supporting CAN FD per ISO 11898-1 - deployed in automotive PEPS and industrial WBMS systems requiring functional safety and cryptographic isolation.

For engineers reviewing the KW45Z41053AFTBT datasheet, KW45Z41053AFTBT pinout, KW45Z41053AFTBT application, or KW45Z41053AFTBT equivalent, this page delivers verified package mapping (48-pin HVQFN, 7×7 mm, wettable flanks), confirmed CAN FD + EdgeLock Secure Enclave capabilities, low-power operation down to 1.5 μA in Deep Power-Down mode, and precise alternative part selection guidance for automotive-grade MCU migration paths.

Technical Context

The KW45Z41053AFTBT implements a dual-domain security architecture: Arm TrustZone-M enforces secure/non-secure memory and peripheral partitioning, while the isolated EdgeLock Secure Enclave provides hardware-accelerated AES-128/256, ECDSA, SHA2-256/512, TRNG, and PRINCE-based on-the-fly flash decryption. It excludes the Bluetooth LE 5.3 radio subsystem present in KW45B variants.

Its system-level timing relies on multiple independent oscillators: 32 MHz RF crystal oscillator (not used in Z-series), 32.768 kHz RTC crystal, 192 MHz FRO (divided to 96 MHz core clock), and 6 MHz/32 kHz low-power free-running sources. Power management includes DCDC regulator (1.8–3.6 V), Core_LDO (1.2–3.6 V), SYS_LDO (1.71–3.6 V), and ultra-low-leakage Smart Power Switch (<100 nA sleep current).

Key Specifications

Pinout & Package

Package: 48-pin HVQFN (SOT619-17(D)), 7 mm × 7 mm × 0.85 mm, 0.5 mm pitch, wettable flanks.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KW45Z41053AFTBT, MKW45Z41053AFTBT offers identical functionality and drop-in replacement capability, while S32K144WHT0MLHT provides higher performance and AUTOSAR alignment at the cost of different security architecture and no PRINCE-based flash protection.

Availability

KW45Z41053AFTBT is available at Aetrix Electronics and suitable for automotive keyless entry systems, industrial wireless battery management systems (WBMS), and building access control solutions requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant manufacturing traceability.

Supply support for KW45Z41053AFTBT 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 hardware security IP.

The KW45 product line was designed specifically for automotive and industrial edge nodes demanding concurrent CAN FD networking, Bluetooth LE 5.3 (in B-variants), and certified hardware security - KW45Z41053AFTBT serves as the radio-free, CAN FD–enabled MCU variant optimized for cost-sensitive, security-critical control applications.

FAQ

Does KW45Z41053AFTBT include an integrated Bluetooth Low Energy radio?

No, KW45Z41053AFTBT is the MCU-only variant of the KW45 family and does not contain the Bluetooth LE 5.3 radio subsystem. That functionality is present only in KW45B-series parts (e.g., KW45B41Z53AFTBT). KW45Z41053AFTBT retains all other MCU features including FlexCAN FD, EdgeLock Secure Enclave, and low-power modes - making it ideal for CAN-centric automotive control units where BLE is handled externally or omitted entirely.

What is the maximum operating frequency of the Arm Cortex-M33 core in KW45Z41053AFTBT?

The Arm Cortex-M33 core in KW45Z41053AFTBT operates at up to 96 MHz, enabled by the internal 192 MHz free-running oscillator (FRO-192M) with configurable dividers. This frequency is sustained across the full –40 °C to +105 °C ambient temperature range and supported by the 8 KB instruction cache to maintain deterministic real-time performance in automotive and industrial applications.

Is KW45Z41053AFTBT pin-compatible with KW45B41Z53AFTBT?

Yes, KW45Z41053AFTBT and KW45B41Z53AFTBT share identical 48-pin HVQFN packaging (7×7 mm, wettable flanks), mechanical footprint, and pin assignment - including reserved RF-related pins (e.g., VDD_RF, ANT, RFIO) which remain NC/no-connect in the Z-variant. This allows common PCB layout reuse across both radio-equipped and radio-free designs within the same platform.

What security certifications apply to the EdgeLock Secure Enclave in KW45Z41053AFTBT?

The EdgeLock Secure Enclave in KW45Z41053AFTBT implements NIST SP 800-90A/B compliant TRNG, FIPS 140-2 Level 3–aligned cryptographic accelerators (AES, ECDSA, SHA2), and secure boot with immutable ROM validation - though formal FIPS certification is not claimed for the die itself. Its architecture satisfies ISO/SAE 21434 threat analysis requirements and supports Common Criteria EAL5+ evaluation scope for automotive secure boot and key management subsystems.

Can KW45Z41053AFTBT support CAN FD data rates above 2 Mbps?

Yes, KW45Z41053AFTBT's FlexCAN module supports CAN FD bit rates up to 5 Mbps in the data phase, compliant with ISO 11898-1:2015. This capability is validated across the full AEC-Q100 Grade 2 temperature range and enables high-throughput communication in modern vehicle architectures - such as battery management systems transferring cell voltage arrays or ADAS sensor fusion data over CAN FD backbone networks.