NXP Semiconductors FS32K146HRT0VLLR

Overview

FS32K146HRT0VLLR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (ECC), and integrated CSEc security engine. It operates at up to 112 MHz in HSRUN mode (−40 °C to +105 °C), supports FlexCAN with CAN-FD, triple LPUART/LIN, dual LPI2C, and quad LPSPI - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146HRT0VLLR datasheet, FS32K146HRT0VLLR pinout, FS32K146HRT0VLLR application, or FS32K146HRT0VLLR equivalent, this page delivers verified package mapping (100-pin LQFP), validated power modes (HSRUN/RUN/STOP/VLPR/VLPS), confirmed peripheral counts (3× FlexCAN, 8× FTM, 2× ADC), and real-world safety/security constraints including mandatory RUN-mode execution for CSEc operations.

Technical Context

The FS32K146HRT0VLLR 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 integrates SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz), with independent domain gating for low-power operation.

Memory subsystem includes ECC-protected 2 MB program flash, 64 KB FlexNVM (with EEPROM emulation), 256 KB SRAM, 4 KB FlexRAM, and 4 KB code cache. Safety features include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and ISO 26262-compliant design up to ASIL-B - all validated for automotive body electronics and chassis applications.

Key Specifications

Pinout & Package

FS32K146HRT0VLLR is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow NXP's standardized S32K14x pinout layout, supporting full peripheral access including dual ADC inputs, 3× CAN transceiver interfaces, and 100 GPIOs with interrupt capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144HRT0VLLR, the FS32K146HRT0VLLR adds 1 MB flash, 64 KB SRAM, and a third FlexCAN - enabling richer feature sets in body control without changing PCB layout. Against FS32K148HRT0VLLR, it omits Ethernet and SAI but maintains identical safety architecture and lower BOM cost for non-connected applications.

Availability

FS32K146HRT0VLLR is available at Aetrix Electronics and suitable for automotive body control modules, electronic power steering systems, advanced lighting controllers, and vehicle gateway applications requiring stable component supply across extended production lifecycles.

Supply support for FS32K146HRT0VLLR 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 automotive, industrial, and IoT applications, delivering secure, energy-efficient, and scalable silicon solutions.

The S32K1xx family - including FS32K146HRT0VLLR - was designed specifically for automotive body electronics and chassis control, emphasizing ASIL-B functional safety, robust EMC performance, and long-term automotive qualification (AEC-Q100 Grade 1).

FAQ

What is the maximum operating frequency of the FS32K146HRT0VLLR and under what conditions?

The FS32K146HRT0VLLR achieves 112 MHz in HSRUN mode, but only within the −40 °C to +105 °C ambient temperature range and with VDD ≥ 2.7 V. At 125 °C junction temperature (M-grade), maximum frequency drops to 80 MHz in RUN mode. The device automatically throttles if thermal or voltage limits are exceeded, and CSEc operations require explicit switch to RUN mode regardless of temperature.

Does the FS32K146HRT0VLLR support CAN-FD, and how many CAN interfaces are available?

Yes, the FS32K146HRT0VLLR supports CAN-FD on all three FlexCAN modules. Each module is independently configurable for classic CAN or CAN-FD (ISO 11898-1), with bit rates up to 5 Mbps in FD mode. All three CAN transceivers share the same 100-pin LQFP package footprint and require external transceivers for physical layer implementation.

What are the memory protection mechanisms implemented in the FS32K146HRT0VLLR?

The FS32K146HRT0VLLR uses NXP's System MPU - a crossbar-switch-level memory protection unit that assigns access rights per master (CPU, DMA, Ethernet) to each protected memory region. Unlike Arm Core MPU, this system-level MPU prevents unauthorized access from any bus master, satisfying ASIL-B requirements. ECC on flash and SRAM further protects against single-bit errors.

Can the FS32K146HRT0VLLR execute CSEc cryptographic operations in HSRUN mode?

No. The FS32K146HRT0VLLR explicitly prohibits CSEc (Security) or EEPROM write/erase operations in HSRUN mode (112 MHz). Attempting such operations triggers error flags. The device must be switched to RUN mode (80 MHz) before initiating secure boot, key provisioning, or FlexNVM writes - a hardware-enforced constraint documented in the S32K1xx Data Sheet Rev. 15.

What package and pin count does the FS32K146HRT0VLLR use, and is it pin-compatible with other S32K14x devices?

The FS32K146HRT0VLLR uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. It is fully pin-to-pin compatible with other S32K14x devices in the same package option - including FS32K144HRT0VLLR and FS32K148HRT0VLLR - allowing hardware reuse across performance tiers while maintaining identical PCB layout and signal routing.