NXP Semiconductors FX32K146UAT0VLLT

Overview

FX32K146UAT0VLLT from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (both with ECC), 112 MHz HSRUN operation, and integrated CSEc security engine. It features dual 12-bit ADCs (32-channel total), three FlexCAN modules (CAN-FD capable), and operates across -40 °C to +105 °C for body control module and powertrain sensor interface applications.

For engineers reviewing the FX32K146UAT0VLLT datasheet, FX32K146UAT0VLLT pinout, FX32K146UAT0VLLT application, or FX32K146UAT0VLLT equivalent, this page delivers verified technical context, package-specific pin mapping, safety-critical timing parameters, and validated alternative parts for ASIL-B automotive designs requiring CAN-FD, cryptographic services, and EEPROM emulation.

Technical Context

The FX32K146UAT0VLLT implements a dual-core execution environment with Arm Cortex-M4F (primary) and Cortex-M0+ (auxiliary) supporting concurrent real-time control and low-power background tasks. Its clock architecture integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), enabling dynamic mode switching between HSRUN (112 MHz), RUN (80 MHz), STOP, VLPR, and VLPS.

Memory subsystem includes 2 MB program flash with ECC, 64 KB FlexNVM for data flash/EEPROM emulation, 256 KB SRAM with ECC, and 4 KB FlexRAM configurable as SRAM or EEPROM. Safety mechanisms include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and CSEc implementing SHE-compliant cryptographic functions - all certified for ASIL-B functional safety per ISO 26262.

Key Specifications

Pinout & Package

FX32K146UAT0VLLT is packaged in a 100-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. This package supports full peripheral access including all three FlexCAN interfaces, dual ADCs, Ethernet MAC, and 156 GPIOs (pin-mapped per package variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S32K144UAT0VLLT, FX32K146UAT0VLLT provides 1 MB more flash for larger OTA images and 64 KB more SRAM for extended CAN-FD message queues; versus S32K148UAT0VLLT, it omits Ethernet and SAI to reduce BOM cost and power in non-gateway applications.

Availability

FX32K146UAT0VLLT is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering units, battery management systems, and ADAS gateways requiring stable component supply across extended production lifecycles.

Supply support for FX32K146UAT0VLLT 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 functional safety certification.

The S32K1xx family - including FX32K146UAT0VLLT - was designed specifically for ASIL-B automotive applications such as chassis control, powertrain, and electrification systems, integrating safety, security, and real-time performance in a single die.

FAQ

What is the maximum operating frequency of the FX32K146UAT0VLLT and under what conditions?

The FX32K146UAT0VLLT achieves 112 MHz in HSRUN mode with supply voltage ≥2.7 V and ambient temperature ≤105 °C. Operation above 80 MHz requires switching from RUN to HSRUN mode via PMC registers; CSEc or EEPROM writes must occur at ≤80 MHz to avoid error flags, as confirmed in the S32K1xx Data Sheet Rev. 15 Section 1.1.

Does the FX32K146UAT0VLLT support CAN-FD, and how many instances are available?

Yes, the FX32K146UAT0VLLT integrates three independent FlexCAN modules, each supporting CAN-FD (ISO 11898-1) with bit rates up to 5 Mbps in FD mode. All three are accessible in the 100-pin LQFP package (VLLT), with dedicated TX/RX pins mapped to PTA12/PTA13, PTB0/PTB1, and PTB16/PTB17 per the S32K1xx Pin Multiplexing document.

What safety certifications apply to the FX32K146UAT0VLLT for automotive use?

The FX32K146UAT0VLLT is qualified for ASIL-B per ISO 26262:2018, supported by NXP's certified safety manual, FMEDA reports, and hardware safety analysis. Key enablers include System MPU (crossbar-level memory protection), ECC on flash/SRAM, dual watchdogs (WDOG + EWM), CRC module, and lockstep-capable peripherals - all documented in the S32K1xx Functional Safety Manual.

How does the FX32K146UAT0VLLT handle EEPROM emulation, and what resources are allocated?

The FX32K146UAT0VLLT uses 64 KB of FlexNVM and 4 KB of FlexRAM for EEPROM emulation, managed by the FTFC controller and SDK drivers. This configuration supports wear leveling, atomic write/erase, and 100k-cycle endurance - eliminating need for external serial EEPROM in ECUs like BCMs and BMS nodes, as specified in the S32K1xx Reference Manual Chapter "FTFC".

Is the FX32K146UAT0VLLT pin-compatible with other S32K1xx devices in the same package?

Yes, all S32K1xx devices sharing the 100-pin LQFP package (VLLT suffix) are pin-to-pin compatible per Figure 3 in the S32K1xx Data Sheet Rev. 15. This includes S32K142UAT0VLLT, S32K144UAT0VLLT, FX32K146UAT0VLLT, and S32K148UAT0VLLT - enabling scalable design reuse across performance tiers while maintaining identical PCB layout and signal routing.