NXP Semiconductors FS32K146HRT0MLQT

Overview

FS32K146HRT0MLQT 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 body control modules, battery management systems, and chassis domain controllers.

For engineers reviewing the FS32K146HRT0MLQT datasheet, FS32K146HRT0MLQT pinout, FS32K146HRT0MLQT application, or FS32K146HRT0MLQT equivalent, this page delivers verified technical context, package mapping to 144-pin LQFP, real-world timing and safety constraints (e.g., CSEc execution requiring RUN mode), and validated alternative parts for functional migration.

Technical Context

The FS32K146HRT0MLQT implements a dual-core capable architecture with Arm Cortex-M4F core (112 MHz HSRUN, 80 MHz RUN) and optional M0+ co-processor support via software configuration. It integrates SPLL clock generation up to 112 MHz, FIRC/SIRC/LPO oscillators, and configurable power modes including HSRUN, RUN, STOP, VLPR, and VLPS - with strict mode-dependent restrictions on CSEc and EEPROM operations.

Its memory subsystem includes 2 MB program flash with ECC, 64 KB FlexNVM for data flash/EEPROM emulation, 256 KB SRAM with ECC, and 4 KB FlexRAM usable as SRAM or EEPROM. Safety features include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and ISO 26262 ASIL-B capable design targeting automotive functional safety compliance.

Key Specifications

Pinout & Package

FS32K146HRT0MLQT is packaged in a 144-pin LQFP (16 × 16 mm, 0.5 mm pitch), RoHS-compliant, with thermal pad. Pinout conforms to S32K14x family layout; all I/O pins support interrupt capability and configurable pull-up/down.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HRT0MLQT, S32K144HRT0MLQT reduces memory and CAN-FD channels for cost-sensitive nodes, while S32K148HRT0MLQT adds Ethernet and SAI for high-bandwidth domain controllers - all maintain pin-to-pin compatibility and identical M-grade temperature rating.

Availability

FS32K146HRT0MLQT is available at Aetrix Electronics and suitable for automotive body electronics, battery management systems, and chassis control applications requiring stable component supply across extended product lifecycles.

Supply support for FS32K146HRT0MLQT 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, IoT, and communication infrastructure solutions, with deep expertise in functional safety and secure microcontrollers.

The S32K1xx family is designed specifically for automotive electronic control units (ECUs), emphasizing ASIL-B compliance, robust power management, and seamless integration into AUTOSAR-based software stacks - with FS32K146HRT0MLQT targeting mid-tier domain controllers.

FAQ

What is the maximum operating frequency of the FS32K146HRT0MLQT, and under what conditions?

The FS32K146HRT0MLQT operates at up to 112 MHz in HSRUN mode and 80 MHz in RUN mode. HSRUN mode is restricted: CSEc cryptographic operations and EEPROM writes/erases are prohibited and will trigger error flags. These functions require switching to RUN mode (80 MHz). The device's ambient temperature rating is −40 °C to +125 °C (M-grade), validated at ≤80 MHz for RUN mode operation.

Does the FS32K146HRT0MLQT support CAN-FD, and how many instances are available?

Yes, the FS32K146HRT0MLQT integrates three independent FlexCAN modules, all supporting CAN-FD (ISO 11898-1 CD) with data rates up to 5 Mbps. Each module supports flexible bit timing, message filtering, and hardware FIFOs. CAN-FD frames can coexist with classical CAN on the same bus, enabling phased migration in vehicle networks without replacing existing ECUs.

What safety and security features does the FS32K146HRT0MLQT provide for automotive use?

The FS32K146HRT0MLQT includes System MPU (crossbar-level memory protection), ECC on flash and SRAM, CRC acceleration, dual watchdogs (WDOG + EWM), and the Cryptographic Services Engine (CSEc) compliant with SHE v3.0. It is qualified for ISO 26262 ASIL-B development and supports secure boot, encrypted firmware updates, and key provisioning - all essential for automotive ECU certification.

Which package type and pin count does the FS32K146HRT0MLQT use?

The FS32K146HRT0MLQT uses a 144-pin LQFP package (16 mm × 16 mm, 0.5 mm pitch) with exposed thermal pad. This package is pin-to-pin compatible with other S32K14x devices in the same footprint, including S32K144HRT0MLQT and S32K148HRT0MLQT, enabling scalable hardware design across performance tiers.

Can the FS32K146HRT0MLQT execute CSEc operations while running at 112 MHz?

No. The FS32K146HRT0MLQT cannot execute CSEc (Cryptographic Services Engine) operations or EEPROM writes/erases while in HSRUN mode (112 MHz). Attempting such operations triggers error flags. The device must transition to RUN mode (80 MHz) before initiating CSEc commands or FlexNVM programming - a hardware-enforced constraint documented in the S32K1xx Data Sheet Rev. 15.