NXP Semiconductors FS32K146ULT0VLLT

Overview

FS32K146ULT0VLLT from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (ECC), and dual 12-bit ADCs. It operates at up to 112 MHz in HSRUN mode, supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, and LPI2C, and targets body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146ULT0VLLT datasheet, FS32K146ULT0VLLT pinout, FS32K146ULT0VLLT application, or FS32K146ULT0VLLT equivalent, this page delivers verified technical context, package mapping, real-world use scenarios, and validated alternative options for automotive ECU design and qualification.

Technical Context

The FS32K146ULT0VLLT integrates an Arm Cortex-M4F core with single-precision FPU and DSP extensions, executing at 112 MHz in HSRUN mode (80 MHz in RUN mode) with 1.25 DMIPS/MHz performance. Its memory subsystem includes 2 MB ECC-protected program flash, 64 KB FlexNVM with EEPROM emulation, and 256 KB ECC-protected SRAM - all supporting automotive lifecycle requirements.

It implements NXP's system-level Memory Protection Unit (MPU) at the Crossbar Switch level for ASIL-B compliance, alongside CSEc cryptographic engine, CRC module, WDOG/EWM watchdogs, and dual 12-bit ADCs (up to 32 channels each). Power management supports five modes: HSRUN, RUN, STOP, VLPR, VLPS - with strict mode restrictions on CSEc/EEPROM operations.

Key Specifications

Pinout & Package

FS32K146ULT0VLLT is packaged in a 100-pin LQFP (Lead-Free, RoHS-compliant) with 0.5 mm pitch, measuring 14 mm × 14 mm. This package supports full I/O access for CAN-FD, multiple UART/SPI/I2C interfaces, ADC inputs, and GPIOs while maintaining thermal performance for extended automotive operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K148UJT0VLQT, FS32K146ULT0VLLT trades Ethernet/SAI for lower cost and smaller footprint while retaining identical CAN-FD, ADC, and safety features; versus FS32K144UJT0VLHT, it doubles flash and SRAM capacity and adds 40+ GPIOs - critical for scalable ECU platforms requiring future software expansion.

Availability

FS32K146ULT0VLLT is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering units, ADAS sensor hubs, and gateway controllers requiring stable component supply across extended production lifecycles.

Supply support for FS32K146ULT0VLLT 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 FS32K146ULT0VLLT - was designed specifically for automotive electronic control units requiring ASIL-B compliance, robust EMC performance, and long-term supply assurance in harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146ULT0VLLT and under what conditions?

The FS32K146ULT0VLLT achieves 112 MHz in HSRUN mode with VDD ≥ 2.7 V and ambient temperature ≤ 105 °C. In RUN mode, it operates at 80 MHz - required for CSEc cryptographic operations and EEPROM writes/erase, as these functions are prohibited in HSRUN mode per device specification. The core uses Armv7-M architecture with Thumb-2 ISA and delivers 1.25 DMIPS/MHz.

Does the FS32K146ULT0VLLT support CAN-FD, and how many CAN interfaces does it include?

Yes, the FS32K146ULT0VLLT supports CAN-FD through three independent FlexCAN modules, each configurable for Classic CAN or CAN-FD (up to 5 Mbps). All three modules are fully functional in the 100-pin LQFP package (FS32K146ULT0VLLT), enabling simultaneous high-speed communication on multiple vehicle networks without external transceivers beyond standard CAN PHY components.

What memory resources are available on the FS32K146ULT0VLLT, and are they protected against corruption?

The FS32K146ULT0VLLT includes 2 MB of program flash memory, 64 KB of FlexNVM for data flash/EEPROM emulation, and 256 KB of SRAM - all protected by Error-Correcting Code (ECC). ECC detection and correction are hardware-implemented, covering both single-bit errors (corrected) and multi-bit errors (detected), ensuring data integrity in automotive environments subject to radiation and voltage transients.

How does the FS32K146ULT0VLLT meet ISO 26262 ASIL-B requirements?

The FS32K146ULT0VLLT meets ASIL-B through integrated safety mechanisms: system-level MPU enforcing memory access rights at the Crossbar Switch, ECC on flash/SRAM, CRC module for data integrity, dual watchdogs (WDOG and EWM), lockstep-capable peripherals, and diagnostic libraries in the S32 SDK. These features are documented in NXP's ISO 26262-certified safety manual for the S32K1xx series.

What is the temperature grade and package type of the FS32K146ULT0VLLT?

The FS32K146ULT0VLLT is rated for -40 °C to +105 °C ambient operation (V-grade) and housed in a 100-pin LQFP package with 0.5 mm pitch and lead-free/RoHS-compliant finish. This package supports full pin access for all integrated peripherals including CAN-FD, multiple UART/SPI/I2C interfaces, ADC inputs, and GPIOs, and is validated for reflow soldering per J-STD-020.