NXP Semiconductors FS32K146HFT0MLHR

Overview

FS32K146HFT0MLHR 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 features dual 12-bit ADCs (32-channel total), three FlexCAN modules (CAN-FD capable), and operates across -40 °C to +125 °C for engine control and body electronics applications.

For engineers reviewing the FS32K146HFT0MLHR datasheet, FS32K146HFT0MLHR pinout, FS32K146HFT0MLHR application, or FS32K146HFT0MLHR equivalent, key selection criteria include ASIL-B-capable safety architecture, FlexIO protocol emulation support, HyperBus™-enabled QuadSPI interface, and mandatory mode-switching (RUN at 80 MHz) for CSEc/EEPROM operations - all confirmed in the S32K1xx Rev. 15 datasheet.

Technical Context

The FS32K146HFT0MLHR implements a dual-core execution environment via Arm Cortex-M4F core with integrated FPU and DSP extensions, supporting deterministic real-time control in HSRUN (112 MHz) and energy-efficient RUN (80 MHz) modes. Its AXBS-Lite crossbar switch enables concurrent access by CPU, eDMA, and Ethernet MAC to protected memory regions managed by NXP's system MPU.

Power management includes five low-power modes (HSRUN, RUN, STOP, VLPR, VLPS), with PMC-enforced restrictions: CSEc cryptographic operations and FlexNVM EEPROM emulation are prohibited in HSRUN mode and require explicit transition to RUN mode. Clocking combines SOSC (4–40 MHz), FIRC (48 MHz), SPLL (up to 112 MHz), and LPO (128 kHz) for precise timing across domains.

Key Specifications

Pinout & Package

FS32K146HFT0MLHR is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) with thermal pad, supporting full I/O count (up to 156 GPIOs) and pin-to-pin compatibility across S32K14x family members sharing the same package option.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144HFT0VLHR, FS32K146HFT0MLHR adds 125 °C ambient rating and 1 MB extra flash for complex OTA update staging; versus FS32K148HFT0MLHR, it trades Ethernet/SAI for guaranteed QuadSPI support in 100-pin LQFP - optimizing for powertrain control over networking.

Availability

FS32K146HFT0MLHR is available at Aetrix Electronics and suitable for engine control units, ADAS sensor hubs, body control modules, and electric power steering controllers requiring stable component supply across automotive production lifecycles.

Supply support for FS32K146HFT0MLHR 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 and industrial processors, with deep expertise in functional safety and ASIL-certified MCU development.

The S32K1xx product line delivers scalable Arm Cortex-M automotive MCUs designed specifically for real-time control, safety-critical functions, and secure communication in powertrain, chassis, and ADAS applications.

FAQ

What is the maximum operating frequency of the FS32K146HFT0MLHR and under which conditions?

The FS32K146HFT0MLHR 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 range. The 112 MHz frequency is only permitted in HSRUN mode per the S32K1xx datasheet Rev. 15, and cannot be used for CSEc or EEPROM operations - those require switching to RUN mode at 80 MHz. This behavior is enforced by hardware error flag generation.

Does the FS32K146HFT0MLHR support CAN-FD, and how many instances are available?

Yes, the FS32K146HFT0MLHR integrates three FlexCAN modules, all supporting CAN-FD per ISO 11898-1 with data rates up to 5 Mbps. All three instances are available in the 100-pin LQFP package (FS32K146HFT0MLHR), with full pinout allocation confirmed in the S32K1xx IO Signal Description document. CAN-FD frame handling is accelerated by hardware message filtering and RAM-based mailboxes, reducing CPU load during high-bandwidth bus traffic.

What memory protection mechanisms does the FS32K146HFT0MLHR implement for functional safety compliance?

The FS32K146HFT0MLHR implements NXP's system Memory Protection Unit (MPU) at the AXBS-Lite crossbar switch level - not the Arm core MPU - allowing independent access rights assignment for CPU, eDMA, and Ethernet MAC masters to protected memory regions. Combined with ECC on 2 MB flash and 256 KB SRAM, this architecture supports ASIL-B compliance per ISO 26262. The MPU configuration is managed via dedicated registers and validated in the S32K1xx Reference Manual chapter "System Memory Protection Unit".

Can the FS32K146HFT0MLHR execute cryptographic operations while running at 112 MHz?

No. The FS32K146HFT0MLHR's Cryptographic Services Engine (CSEc) and FlexNVM EEPROM emulation functions are explicitly prohibited in HSRUN mode (112 MHz). Attempting either triggers hardware error flags. The device must transition to RUN mode (80 MHz) before initiating CSEc operations or EEPROM writes/erases. This restriction is documented in multiple sections of the S32K1xx datasheet Rev. 15, including Features, Block Diagram notes, and Ordering Information.

What is the ADC resolution and channel count supported by the FS32K146HFT0MLHR?

The FS32K146HFT0MLHR integrates two independent 12-bit SAR analog-to-digital converters (ADCs), each supporting up to 32 analog input channels - for a total of 64 configurable inputs. Each ADC achieves 1 Msps sampling rate with hardware averaging, programmable gain, and flexible trigger sources (FlexTimer, PDB, or software). Channel mapping and multiplexing are defined in the S32K1xx Reference Manual "ADC" chapter and verified in the IO Signal Description sheet for the 100-pin LQFP package.