NXP Semiconductors FS32K146HFT0MLLT

Overview

FS32K146HFT0MLLT 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 CSEc security engine, dual 12-bit ADCs (up to 32 channels), three FlexCAN modules (CAN-FD capable), and operates across -40 °C to +125 °C ambient temperature. It is designed for real-time control in automotive body electronics and chassis systems.

For engineers reviewing the FS32K146HFT0MLLT datasheet, FS32K146HFT0MLLT pinout, FS32K146HFT0MLLT application, or FS32K146HFT0MLLT equivalent, this page delivers verified technical context, validated pin-level functionality, confirmed safety features (ASIL-B capable), exact memory partitioning (FlexNVM/EEPROM emulation), and precise alternative part comparisons - all aligned to the official S32K1xx Rev. 15 datasheet and orderable part number definitions.

Technical Context

The FS32K146HFT0MLLT implements a dual-core architecture with Arm Cortex-M4F as primary execution core (112 MHz HSRUN / 80 MHz RUN) and optional M0+ for low-power co-processing. Its clock system includes SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz), with configurable clock gating per peripheral domain.

Power management supports five modes: HSRUN, RUN, STOP, VLPR, and VLPS, with PMC-enforced transitions. Critical operations like CSEc cryptographic execution or EEPROM write/erase are restricted to RUN mode (80 MHz) - not permitted in HSRUN - ensuring deterministic timing and memory integrity under safety-critical conditions.

Key Specifications

Pinout & Package

FS32K146HFT0MLLT 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 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 FS32K146HFT0MLLT, S32K144HFT0MLLT reduces memory and connectivity for cost-constrained entry-level ECUs, while S32K148HFT0MLLT adds Ethernet and audio interfaces for centralized vehicle computing - making FS32K146HFT0MLLT the optimal balance of safety, performance, and feature set for mainstream chassis and body domain controllers.

Availability

FS32K146HFT0MLLT is available at Aetrix Electronics and suitable for automotive body control, electric power steering, chassis domain control, and vehicle gateway applications requiring stable component supply, long-term lifecycle support, and ASIL-B compliance.

Supply support for FS32K146HFT0MLLT 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, industrial, and IoT solutions, with deep expertise in functional safety and automotive cybersecurity.

The S32K1xx family - including FS32K146HFT0MLLT - was engineered specifically for ASIL-B automotive control applications, integrating safety mechanisms (ECC, MPU, WDOG), security (CSEc), and real-time responsiveness into a scalable MCU platform.

FAQ

What is the maximum operating frequency of the FS32K146HFT0MLLT and under which power mode?

The FS32K146HFT0MLLT achieves a maximum operating frequency of 112 MHz in HSRUN mode, optimized for peak computational throughput in safety-critical real-time tasks. In RUN mode, it operates at up to 80 MHz - the required mode for executing CSEc cryptographic operations or FlexNVM EEPROM emulation, as HSRUN mode disables these functions to maintain timing determinism.

Does the FS32K146HFT0MLLT support CAN-FD, and how many interfaces are available?

Yes, the FS32K146HFT0MLLT integrates three independent FlexCAN modules, each supporting CAN-FD (ISO 11898-1) with data rates up to 5 Mbps. All three interfaces are accessible in the 100-pin LQFP package and support programmable bit timing, loopback testing, and hardware message filtering - essential for multi-bus automotive network topologies.

What memory protection mechanisms does the FS32K146HFT0MLLT implement for ASIL-B compliance?

The FS32K146HFT0MLLT implements NXP's system-level Memory Protection Unit (MPU) at the crossbar switch, enforcing access permissions per master (CPU, DMA, Ethernet). Combined with ECC on 2 MB flash and 256 KB SRAM, and a dedicated External Watchdog Monitor (EWM), these features collectively satisfy ASIL-B requirements for memory integrity and fault containment in automotive control systems.

Can the FS32K146HFT0MLLT execute secure boot and cryptographic operations in HSRUN mode?

No - the FS32K146HFT0MLLT explicitly prohibits CSEc (Cryptographic Services Engine) execution and EEPROM write/erase operations while in HSRUN mode (112 MHz). These functions must be performed in RUN mode (80 MHz) to ensure deterministic timing and avoid triggering error flags. This restriction is documented in the S32K1xx datasheet Rev. 15 and enforced by hardware state machines within the FS32K146HFT0MLLT.

What is the ambient temperature rating of the FS32K146HFT0MLLT, and how does it relate to its thermal grade designation?

The FS32K146HFT0MLLT carries an "M" temperature grade, specifying operation from -40 °C to +125 °C ambient temperature. This rating applies in RUN mode (≤80 MHz); in HSRUN mode (112 MHz), the maximum ambient is limited to +105 °C per thermal derating guidelines in the datasheet. The "M" suffix in FS32K146HFT0MLLT confirms qualification for under-hood automotive environments.