NXP Semiconductors FS32K146UAT0VLLT

Overview

FS32K146UAT0VLLT from NXP Semiconductors is an automotive-grade 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 from -40 °C to 105 °C in LQFP-100 package - deployed in vehicle body control modules requiring functional safety up to ASIL-B.

For engineers reviewing the FS32K146UAT0VLLT datasheet, FS32K146UAT0VLLT pinout, FS32K146UAT0VLLT application, or FS32K146UAT0VLLT equivalent, key selection considerations include HSRUN/RUN mode switching constraints for CSEc/EEPROM operations, FlexCAN FD channel count per package, LQFP-100 I/O allocation (up to 81 GPIO), and voltage range compatibility (2.7–5.5 V) in automotive power domains.

Technical Context

The FS32K146UAT0VLLT implements a dual-core execution environment via Arm Cortex-M4F (primary) and M0+ (auxiliary) with shared AXBS-Lite crossbar, enabling concurrent real-time control and safety monitoring. Its memory subsystem includes ECC-protected 2 MB flash, 64 KB FlexNVM for EEPROM emulation, and 4 KB FlexRAM configurable as SRAM or EEPROM backup.

Power management uses five discrete modes (HSRUN, RUN, STOP, VLPR, VLPS), with mandatory mode transition from 112 MHz HSRUN to 80 MHz RUN for CSEc cryptographic operations or FlexNVM write/erase - enforced by hardware error flag generation. Clock architecture integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz) with flexible peripheral clock gating.

Key Specifications

Pinout & Package

FS32K146UAT0VLLT is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per the S32K1xx Reference Manual IO Signal Description sheet; I/O count reaches 81 GPIO with interrupt capability, plus dedicated power, ground, clock, reset, and debug pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K148UAT0VLQT, FS32K146UAT0VLLT trades Ethernet and audio interfaces for smaller footprint and lower cost while retaining identical safety/security IP and CAN-FD capability; versus FS32K144UAT0VLHT, it doubles flash and expands I/O count without increasing core frequency or power envelope.

Availability

FS32K146UAT0VLLT is available at Aetrix Electronics and suitable for automotive body control, electronic power steering, and ADAS sensor hub applications requiring stable component supply across extended product lifecycles.

Supply support for FS32K146UAT0VLLT 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 over 30 years of automotive MCU heritage.

The S32K1xx family is designed specifically for ASIL-B automotive applications - emphasizing functional safety, security, low-power operation, and robustness in harsh electrical environments.

FAQ

What is the maximum operating frequency of the FS32K146UAT0VLLT, and under what conditions is it valid?

The FS32K146UAT0VLLT achieves 112 MHz in HSRUN mode, validated across -40 °C to +105 °C ambient temperature with 2.7–5.5 V supply. This frequency is not permitted during CSEc cryptographic operations or FlexNVM write/erase sequences - those require switching to 80 MHz RUN mode per hardware-enforced error flag behavior documented in the S32K1xx Data Sheet Rev. 15.

Does the FS32K146UAT0VLLT support CAN-FD, and how many instances are available?

Yes, the FS32K146UAT0VLLT integrates three independent FlexCAN modules, each supporting CAN-FD per ISO 11898-1 with data rates up to 5 Mbps. All three are accessible in the 100-pin LQFP package (VLLT), with dedicated TX/RX pins assigned per module - confirmed in the S32K1xx Feature Comparison table and IO Signal Description documentation.

What memory protection mechanisms does the FS32K146UAT0VLLT implement for functional safety compliance?

The FS32K146UAT0VLLT employs ECC on 2 MB flash, 256 KB SRAM, and 64 KB FlexNVM; a system-level MPU enforcing access rights per crossbar master (CPU, DMA, Ethernet); CRC acceleration unit; and dual watchdogs (WDOG + EWM). These meet ASIL-B requirements per ISO 26262, with MPU implementation detailed in Figure 1 of the S32K1xx Data Sheet.

Can the FS32K146UAT0VLLT execute CSEc security functions while running at 112 MHz?

No. The FS32K146UAT0VLLT generates hardware error flags if CSEc cryptographic operations (AES, SHA, RSA) or FlexNVM write/erase commands are attempted in HSRUN mode (112 MHz). The device must transition to RUN mode (80 MHz) first - a requirement explicitly stated in multiple sections of the S32K1xx Data Sheet Rev. 15, including Features, Block Diagram notes, and Ordering Information.

What is the GPIO count and package type of the FS32K146UAT0VLLT?

The FS32K146UAT0VLLT uses a 100-pin LQFP package (VLLT suffix) with 81 multiplexed GPIO pins supporting interrupt, pull-up/down, and slew control. Pin mapping and alternate functions are defined in the S32K1xx Reference Manual IO Signal Description sheets - consistent across all S32K14x devices in the same package variant.