NXP Semiconductors FS32K146UIT0VLLR

Overview

FS32K146UIT0VLLR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (both with ECC), and dual-core safety support up to ASIL-B. It operates at 112 MHz in HSRUN mode or 80 MHz in RUN mode across -40 °C to +105 °C, and integrates CSEc security engine, FlexCAN with CAN-FD, and QuadSPI with HyperBus™ for vehicle body control and powertrain ECU applications.

For engineers reviewing the FS32K146UIT0VLLR datasheet, FS32K146UIT0VLLR pinout, FS32K146UIT0VLLR application, or FS32K146UIT0VLLR equivalent, key selection criteria include its 100-pin LQFP package, HSRUN/RUN dual-frequency operation, CSEc cryptographic acceleration, 156 GPIO capability, and ISO 26262-compliant safety architecture.

Technical Context

The FS32K146UIT0VLLR implements a dual-core Arm Cortex-M4F/M0+ architecture with configurable NVIC, single-precision FPU, and DSP extensions - enabling deterministic real-time control and signal processing. Its clock system includes SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), with flexible low-power mode transitions between HSRUN, RUN, STOP, VLPR, and VLPS.

Memory subsystem features ECC-protected 2 MB flash, 64 KB FlexNVM for EEPROM emulation, 256 KB SRAM, 4 KB FlexRAM, and 4 KB code cache. Safety mechanisms include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and hardware-based CSEc supporting SHE-compliant cryptographic operations.

Key Specifications

Pinout & Package

FS32K146UIT0VLLR is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, exposing 156 GPIOs (multiplexed across pins), dedicated power/ground rails, and interface-specific signal groups including CAN, LIN, SPI, I2C, Ethernet, and QuadSPI.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146UIT0VLLR, the S32K144UFT0VLLR offers lower memory and no Ethernet for cost-constrained entry-level ECUs, while the S32K148UFT0VLLR adds Ethernet and SAI for high-end gateways - making FS32K146UIT0VLLR the optimal balance of performance, security, and interface breadth for mainstream automotive control units.

Availability

FS32K146UIT0VLLR is available at Aetrix Electronics and suitable for automotive body control, electric power steering, vehicle gateway, and battery management systems requiring stable component supply across extended product lifecycles.

Supply support for FS32K146UIT0VLLR 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, high-performance automotive, industrial, and IoT solutions with deep expertise in Arm-based microcontrollers and functional safety.

The S32K1xx family - including FS32K146UIT0VLLR - was designed specifically for ASIL-B automotive control applications, integrating safety mechanisms, security engines, and automotive-qualified peripherals into a scalable MCU platform.

FAQ

What is the maximum operating frequency of the FS32K146UIT0VLLR and under what conditions?

The FS32K146UIT0VLLR achieves 112 MHz in HSRUN mode for peak computational throughput, but must operate at 80 MHz in RUN mode when executing CSEc cryptographic functions or FlexNVM EEPROM writes/erases. This frequency restriction is enforced by hardware to maintain timing safety margins and prevent memory access conflicts during security operations.

Does the FS32K146UIT0VLLR support CAN-FD, and how many instances are available?

Yes, the FS32K146UIT0VLLR integrates three independent FlexCAN modules, each supporting CAN-FD per ISO 11898-1 with data rates up to 5 Mbps. All three CAN interfaces are fully functional in the 100-pin LQFP package and support loopback, self-test, and error confinement modes required for automotive diagnostics.

What safety certifications apply to the FS32K146UIT0VLLR?

The FS32K146UIT0VLLR is designed to support ISO 26262 ASIL-B compliance through integrated hardware safety features including ECC on flash and SRAM, System MPU with crossbar-level memory protection, dual watchdogs (WDOG and EWM), CRC accelerator, and lockstep-capable CPU configuration. NXP provides FMEDA reports and safety manuals to aid ASIL-B system integration.

How does the CSEc (Cryptographic Services Engine) function in the FS32K146UIT0VLLR?

The CSEc in FS32K146UIT0VLLR implements SHE-compliant cryptographic primitives including AES-128/256 encryption/decryption, SHA-256 hashing, true random number generation, and secure boot key management. It operates as a dedicated hardware accelerator, offloading crypto tasks from the main CPU while maintaining isolation from general-purpose memory space.

What package type and pin count does the FS32K146UIT0VLLR use?

The FS32K146UIT0VLLR uses a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, designated by the "LL" suffix in its part number. This package exposes all core peripherals including three FlexCAN interfaces, QuadSPI, Ethernet MAC, dual ADCs, and 156 GPIOs multiplexed across available pins.