NXP Semiconductors FS32K146HRT0VMHR

Overview

FS32K146HRT0VMHR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB flash, 256 KB SRAM (both with ECC), and support for HSRUN mode at 112 MHz. It integrates FlexCAN with optional CAN-FD, dual 12-bit ADCs (up to 32 channels), CSEc security engine, and operates across -40 °C to +125 °C ambient temperature. It is used in vehicle body control modules requiring functional safety up to ASIL-B.

For engineers reviewing the FS32K146HRT0VMHR datasheet, FS32K146HRT0VMHR pinout, FS32K146HRT0VMHR application, or FS32K146HRT0VMHR equivalent, this page delivers verified technical context, package mapping, real-world use scenarios, and validated alternative options - all grounded in NXP's official S32K1xx Rev. 15 datasheet and orderable part number documentation.

Technical Context

The FS32K146HRT0VMHR implements a dual-core architecture with Arm Cortex-M4F as primary execution core (112 MHz HSRUN / 80 MHz RUN) and M0+ for low-power background tasks. Its memory subsystem includes 2 MB program flash with ECC, 64 KB FlexNVM for EEPROM emulation, and 256 KB SRAM with ECC - all protected by NXP's system-level MPU at the crossbar switch.

It supports five power modes (HSRUN, RUN, STOP, VLPR, VLPS), with CSEc cryptographic operations and EEPROM writes restricted to RUN mode (80 MHz) due to hardware arbitration constraints. Clocking combines FIRC (48 MHz), SOSC (4–40 MHz), SPLL (up to 112 MHz), and LPO (128 kHz) for deterministic timing across safety-critical domains.

Key Specifications

Pinout & Package

FS32K146HRT0VMHR is packaged in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), pin-compatible with other S32K14x devices in the same package variant. This package supports full peripheral access including all three FlexCAN interfaces, dual ADCs, Ethernet MAC, and 156 GPIOs (with multiplexed functions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with S32K148HRT0VMHR, FS32K146HRT0VMHR removes Ethernet and SAI to reduce die size and power consumption while retaining full CAN-FD and safety features; versus S32K144HRT0VMHR, it adds one FlexCAN channel and doubles SRAM to support richer middleware stacks in domain controllers.

Availability

FS32K146HRT0VMHR is available at Aetrix Electronics and suitable for automotive body control, electric power steering, and battery management systems requiring stable component supply, long-term lifecycle assurance, and ASIL-B-compliant silicon.

Supply support for FS32K146HRT0VMHR 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 functional safety and automotive-grade MCU design.

The S32K1xx family was developed specifically for automotive electronic control units requiring ISO 26262 ASIL-B compliance, robust EMC performance, and seamless integration with AUTOSAR and SafeRTOS environments.

FAQ

What is the maximum operating frequency of the FS32K146HRT0VMHR in HSRUN mode?

The FS32K146HRT0VMHR operates at up to 112 MHz in HSRUN mode, delivering 1.25 Dhrystone MIPS per MHz. This frequency is only permitted in RUN and HSRUN power modes; CSEc security operations and EEPROM writes require switching to 80 MHz RUN mode per NXP's hardware constraint documentation in the S32K1xx datasheet Rev. 15.

Does the FS32K146HRT0VMHR support CAN-FD, and how many interfaces are available?

Yes, the FS32K146HRT0VMHR integrates three independent FlexCAN modules, each supporting CAN-FD (ISO 11898-1 CD) with data rates up to 5 Mbps. All three interfaces are fully accessible in the 100-pin LQFP package and can operate concurrently with separate message buffers and acceptance filters.

What memory protection mechanisms are implemented in the FS32K146HRT0VMHR?

The FS32K146HRT0VMHR uses NXP's system-level Memory Protection Unit (MPU) at the crossbar switch, assigning access rights per master (Cortex-M4F, DMA, Ethernet) to protected memory regions. It also includes ECC on 2 MB flash and 256 KB SRAM, CRC module, and dual watchdogs (WDOG + EWM) - collectively enabling ASIL-B compliance per ISO 26262.

Is the FS32K146HRT0VMHR pin-compatible with other S32K14x devices in the same package?

Yes, all S32K14x devices sharing the 100-pin LQFP package - including FS32K144HRT0VMHR and FS32K148HRT0VMHR - are pin-to-pin compatible per NXP's S32K1xx datasheet Rev. 15 feature comparison table. Peripheral availability depends on pin multiplexing configuration, not physical pin count.

What is the ambient temperature rating for the FS32K146HRT0VMHR, and which power modes apply?

The FS32K146HRT0VMHR is rated for -40 °C to +125 °C ambient temperature (M-grade). This rating applies to RUN mode (≤80 MHz); HSRUN mode (112 MHz) is limited to -40 °C to +105 °C per thermal specifications in the S32K1xx datasheet Rev. 15 Table 5.