NXP Semiconductors FS32K146HFT0MMHR

Overview

FS32K146HFT0MMHR 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 requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146HFT0MMHR datasheet, FS32K146HFT0MMHR pinout, FS32K146HFT0MMHR application, or FS32K146HFT0MMHR equivalent, key selection criteria include its -40 °C to +125 °C ambient rating (M-grade), 100-pin LQFP package, dual-core debug support via SWD/JTAG, and mandatory mode-switching (RUN at 80 MHz) for CSEc or EEPROM operations.

Technical Context

The FS32K146HFT0MMHR implements a single Arm Cortex-M4F core with FPU and DSP extensions, operating at up to 112 MHz in HSRUN mode (with voltage-dependent derating) and 80 MHz in RUN mode. 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 AXBS-Lite crossbar switch.

Peripheral integration centers on automotive I/O requirements: three FlexCAN modules (one with optional CAN-FD), up to 156 GPIOs, eight FlexTimer modules (64 PWM/IC/OC channels), LPIT, LPTMR, PDB, RTC, two 12-bit ADCs (32-channel each), and a comparator with integrated 8-bit DAC - all accessible via configurable TRGMUX and DMAMUX routing.

Key Specifications

Pinout & Package

FS32K146HFT0MMHR is housed in a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow the S32K14x family standard layout, supporting full peripheral mapping including three FlexCAN interfaces, dual 12-bit ADCs, and 156 GPIOs (pin-count constrained by package).

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K148HFT0MLHR, FS32K146HFT0MMHR trades Ethernet/SAI for tighter thermal qualification (125 °C vs. 105 °C) and lower SRAM - better suited for under-hood deployment. Against FS32K144HFT0VLHR, it adds CAN-FD, doubles SRAM, and extends temperature range - enabling higher-integrity body and steering control.

Availability

FS32K146HFT0MMHR is available at Aetrix Electronics and suitable for automotive body control, electric power steering, and ADAS sensor hub applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 Grade 1 qualification.

Supply support for FS32K146HFT0MMHR 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 Arm-based MCUs and functional safety certification.

The S32K1xx family - including FS32K146HFT0MMHR - was designed specifically for automotive electronic control units requiring ASIL-B compliance, robust security, and seamless integration into AUTOSAR and ISO 26262 development workflows.

FAQ

What is the maximum operating frequency of the FS32K146HFT0MMHR and under what conditions?

The FS32K146HFT0MMHR operates at up to 112 MHz in HSRUN mode, but only when supplied with ≥2.97 V and ambient temperature ≤105 °C. At its rated M-grade temperature range (-40 °C to +125 °C), the device must run at 80 MHz in RUN mode. This derating ensures silicon reliability and meets AEC-Q100 thermal specifications. The FS32K146HFT0MMHR datasheet specifies these limits in Tables 3 and 5.

Does the FS32K146HFT0MMHR support CAN-FD, and how many instances are available?

Yes, the FS32K146HFT0MMHR includes three FlexCAN modules, with one supporting CAN-FD (ISO 11898-1 FD). This enables data rates up to 5 Mbps in the data phase while maintaining backward compatibility with classical CAN. The FS32K146HFT0MMHR pinout allocates dedicated CAN0_TX/CAN0_RX signals, and CAN-FD capability is enabled via configuration registers in the FlexCAN module - confirmed in the S32K1xx Reference Manual.

How does the CSEc security engine function in the FS32K146HFT0MMHR, and are there operational constraints?

The FS32K146HFT0MMHR integrates the Cryptographic Services Engine (CSEc) for AES-128, SHA-256, HMAC, and secure key storage per SHE specification. However, CSEc operations - along with EEPROM writes/erases - are prohibited in HSRUN mode (112 MHz). The FS32K146HFT0MMHR must switch to RUN mode (80 MHz) to execute these functions, as stated in the datasheet Feature section and Figure 3 notes. This constraint prevents timing violations during security-critical sequences.

What package type and pin count does the FS32K146HFT0MMHR use, and is it pin-compatible with other S32K14x devices?

The FS32K146HFT0MMHR uses a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. Per the S32K1xx datasheet Section 3.1, all S32K14x devices sharing the 100-pin LQFP package are pin-to-pin compatible - including FS32K142, FS32K144, FS32K146, and FS32K148. This allows hardware reuse across variants while scaling flash, SRAM, and peripheral features in software.

What is the memory configuration of the FS32K146HFT0MMHR, and how is ECC implemented?

The FS32K146HFT0MMHR includes 2 MB of program flash memory, 64 KB of FlexNVM (for EEPROM emulation), and 256 KB of SRAM - all protected by Error-Correcting Code (ECC). ECC operates transparently on read/write cycles, correcting single-bit errors and detecting double-bit errors in real time. This implementation satisfies ASIL-B requirements per ISO 26262 and is enabled by default at boot; the FS32K146HFT0MMHR memory map reserves dedicated ECC syndrome bits per memory word.