NXP Semiconductors FS32K146HAT0VMHT

Overview

FS32K146HAT0VMHT 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/80 MHz RUN operation, and integrated CSEc security engine. It supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, LPI2C, FlexIO, and 12-bit ADCs - deployed in vehicle body control modules, battery management systems, and ADAS domain controllers.

For engineers reviewing the FS32K146HAT0VMHT datasheet, FS32K146HAT0VMHT pinout, FS32K146HAT0VMHT application, or FS32K146HAT0VMHT equivalent, this page delivers verified technical context, package mapping to 100-pin LQFP, real-world timing constraints for HSRUN/RUN mode switching during EEPROM/CSEc operations, and validated alternative part comparisons for functional safety (ASIL-B) designs.

Technical Context

The FS32K146HAT0VMHT implements a dual-core-capable architecture with Arm Cortex-M4F core (112 MHz HSRUN, 80 MHz RUN), integrated FPU, DSP extensions, and configurable NVIC. Its clock system includes SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz), with strict mode-dependent restrictions: CSEc execution and EEPROM writes require RUN mode (80 MHz), not HSRUN.

Power management uses PMC with five modes (HSRUN, RUN, STOP, VLPR, VLPS); memory protection relies on NXP's system MPU at crossbar level-not Arm Core MPU-enabling ASIL-B compliance. Safety features include ECC on flash/SRAM, CRC module, WDOG/EWM, and System MPU with region-based access rights per master (Core, DMA, Ethernet).

Key Specifications

Pinout & Package

FS32K146HAT0VMHT is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch), pin-to-pin compatible with other S32K14x devices in the same package variant. This package supports full peripheral routing including dual CAN-FD, Ethernet MAC, and 156 GPIOs (with interrupt capability).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HAT0VMHT, FS32K148HAT0VMHT adds Ethernet and SAI for sensor hub use cases, while FS32K144HAT0VMHT reduces flash/SRAM and CAN count for entry-level control - all share identical M-grade temperature range, CSEc, and safety architecture.

Availability

FS32K146HAT0VMHT is available at Aetrix Electronics and suitable for automotive body control, battery management, and ADAS interface applications requiring stable component supply across extended product lifecycles and rigorous AEC-Q100 compliance.

Supply support for FS32K146HAT0VMHT 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 FS32K146HAT0VMHT - was designed specifically for automotive electronic control units requiring ASIL-B functional safety, robust security (CSEc), and long-term supply stability in harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146HAT0VMHT and under what conditions?

The FS32K146HAT0VMHT operates at up to 112 MHz in HSRUN mode and 80 MHz in RUN mode. HSRUN mode requires VDD ≥ 2.7 V and ambient temperature ≤ 105 °C; RUN mode supports the full −40 °C to +125 °C M-grade range. CSEc and EEPROM operations are prohibited in HSRUN mode and must execute in RUN mode at 80 MHz.

Does the FS32K146HAT0VMHT support CAN-FD, and how many instances are available?

Yes, the FS32K146HAT0VMHT integrates three FlexCAN modules, all supporting CAN-FD per ISO 11898-1. Each module supports bit rates up to 5 Mbps in FD mode and includes message RAM, acceptance filtering, and loopback self-test capability - enabling multi-bus vehicle networking in body and chassis domains.

What memory protection mechanisms does the FS32K146HAT0VMHT implement for functional safety?

The FS32K146HAT0VMHT uses NXP's system MPU (not Arm Core MPU), enforcing memory protection at the crossbar switch level. It assigns independent read/write/execute permissions per master (CPU, DMA, Ethernet) to protected memory regions - a key enabler for ASIL-B compliance and fault containment in automotive control software.

Can the FS32K146HAT0VMHT execute cryptographic operations while running at 112 MHz?

No. The Cryptographic Services Engine (CSEc) cannot execute in HSRUN mode (112 MHz). Attempting CSEc commands or EEPROM write/erase operations in HSRUN triggers error flags. The device must first switch to RUN mode (80 MHz) - a hardware-enforced restriction documented in the S32K1xx Data Sheet Rev. 15.

What package type and pin count does the FS32K146HAT0VMHT use, and is it pin-compatible with other S32K14x devices?

The FS32K146HAT0VMHT uses a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch). All S32K14x devices sharing the 100-pin LQFP package are pin-to-pin compatible - enabling scalable design reuse across performance tiers (e.g., FS32K144HAT0VMHT → FS32K146HAT0VMHT → FS32K148HAT0VMHT) without PCB changes.