NXP Semiconductors FS32K146HFT0MMHT

Overview

FS32K146HFT0MMHT from NXP Semiconductors is an automotive-grade Arm® Cortex-M4F microcontroller designed for real-time control in safety-critical ECUs. It operates at up to 112 MHz (HSRUN mode), features 2 MB program flash with ECC, 256 KB SRAM with ECC, and supports -40 °C to +125 °C ambient operation. It integrates FlexCAN with optional CAN-FD, multiple low-power communication interfaces, and CSEc cryptographic engine - deployed in body control modules and battery management systems.

For engineers reviewing the FS32K146HFT0MMHT datasheet, FS32K146HFT0MMHT pinout, FS32K146HFT0MMHT application, or FS32K146HFT0MMHT equivalent, this page delivers verified technical context, package-specific pin mapping, functional alternatives, and supply-chain support tailored to automotive embedded design requirements including ASIL-B compliance, EEPROM emulation, and secure boot implementation.

Technical Context

The FS32K146HFT0MMHT implements a dual-core capable architecture with Arm Cortex-M4F core (112 MHz HSRUN / 80 MHz RUN) and integrated Single Precision FPU, DSP extensions, and configurable NVIC. Its memory subsystem includes ECC-protected 2 MB flash, 256 KB SRAM, 64 KB FlexNVM for EEPROM emulation, and 4 KB FlexRAM - all accessible via AXBS-Lite crossbar switch with eDMA support.

Power management is governed by PMC with five operational modes (HSRUN, RUN, STOP, VLPR, VLPS); CSEc security operations and EEPROM writes require mode switching from HSRUN (112 MHz) to RUN (80 MHz). Clocking relies on SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz), with precise timing control via eight FlexTimers, LPIT, LPTMR, and RTC.

Key Specifications

Pinout & Package

FS32K146HFT0MMHT is packaged in a 100-pin LQFP (14 × 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 modules, 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 FS32K146HFT0MMHT, FS32K148HFT0MLHT adds Ethernet and audio interfaces at the cost of larger packaging and higher BOM cost, while FS32K144HFT0VLHT offers pin-compatible downsizing for lower-memory applications - enabling scalable platform design across vehicle domains.

Availability

FS32K146HFT0MMHT is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering, and battery management systems requiring stable component supply, long lifecycle assurance, and ASIL-B ready silicon.

Supply support for FS32K146HFT0MMHT 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 applications, with deep expertise in functional safety and automotive qualification standards.

The S32K1xx family - including FS32K146HFT0MMHT - was engineered specifically for ASIL-B automotive control units, emphasizing robust real-time performance, integrated safety mechanisms, and secure over-the-air update capability from initial silicon design.

FAQ

What is the maximum operating frequency of the FS32K146HFT0MMHT and under what conditions?

The FS32K146HFT0MMHT achieves up to 112 MHz in HSRUN mode, validated across -40 °C to +125 °C ambient temperature. This frequency requires stable 2.7–5.5 V supply and proper clock configuration using the System PLL (SPLL). Note that CSEc security operations and EEPROM writes must be executed in RUN mode (80 MHz) to avoid error flag generation - a hardware-enforced restriction documented in the S32K1xx Data Sheet Rev. 15.

Does the FS32K146HFT0MMHT support CAN-FD, and how is it implemented?

Yes, the FS32K146HFT0MMHT supports CAN-FD through its three integrated FlexCAN modules. Each module can be configured for Classical CAN or CAN-FD (ISO 11898-1:2015) with data rates up to 5 Mbps in the data phase. Implementation requires external CAN-FD transceivers and software initialization of message RAM, FD bit, and bitrate switching - fully supported in the S32K146 SDK and MCAL drivers.

What package type and pin count does the FS32K146HFT0MMHT use?

The FS32K146HFT0MMHT uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), designated by the "MH" suffix in the ordering code. This package is pin-to-pin compatible with other S32K14x devices in the same footprint, enabling hardware reuse across variants like FS32K144HFT0VLHT and FS32K148HFT0MLHT (though the latter requires 176-pin LQFP or MAPBGA).

How does the FS32K146HFT0MMHT handle functional safety requirements for ASIL-B compliance?

The FS32K146HFT0MMHT incorporates multiple hardware safety mechanisms required for ASIL-B: ECC on flash and SRAM, System MPU for memory region protection, CRC acceleration engine, dual watchdogs (WDOG and EWM), lockstep-capable peripherals, and failure interrupt reporting. These features are documented in the S32K1xx Functional Safety Manual and supported by NXP's ISO 26262-certified development process - enabling systematic safety analysis and FMEDA integration.

Can the FS32K146HFT0MMHT execute secure boot and firmware updates?

Yes, the FS32K146HFT0MMHT supports secure boot and authenticated firmware updates via its integrated Cryptographic Services Engine (CSEc). CSEc implements SHE-compliant AES-128, SHA-256, RSA-2048, and true random number generation. Secure boot validates signature of boot image stored in flash; OTA updates are decrypted and authenticated before execution - all enforced in hardware without software intervention.