NXP Semiconductors FS32K146HAT0MLLR

Overview

FS32K146HAT0MLLR from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller designed for real-time safety-critical applications. It operates at up to 112 MHz in 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, three LPUART/LIN modules, and cryptographic services (CSEc) for secure boot and key management - deployed in vehicle body control modules and battery management systems.

For engineers reviewing the FS32K146HAT0MLLR datasheet, FS32K146HAT0MLLR pinout, FS32K146HAT0MLLR application, or FS32K146HAT0MLLR equivalent, this page delivers verified technical context, package-specific pin mapping, functional alternatives, and supply-chain support tailored for automotive OEMs and Tier-1 suppliers requiring ASIL-B capable MCUs with deterministic timing and memory safety.

Technical Context

The FS32K146HAT0MLLR implements a dual-core architecture with Arm Cortex-M4F as primary execution core and optional M0+ for low-power background tasks. Its clock system includes SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), enabling dynamic mode switching between HSRUN, RUN, STOP, VLPR, and VLPS power states. The crossbar switch (AXBS-Lite) arbitrates access to flash, SRAM, peripherals, and DMA across multiple masters including CPU, eDMA, and Ethernet.

Memory subsystem includes ECC-protected 2 MB flash, 256 KB SRAM, 64 KB FlexNVM for EEPROM emulation, and 4 KB FlexRAM configurable as SRAM or EEPROM. Safety mechanisms include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and CSEc engine compliant with SHE specification - all validated for ISO 26262 ASIL-B development workflows.

Key Specifications

Pinout & Package

FS32K146HAT0MLLR 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 routing including 156 GPIOs (with interrupt capability), 32 ADC input channels, and dedicated CAN-FD transceiver pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HAT0MLLR, S32K144HAT0MLLR reduces memory and CAN capacity for lower BOM cost, while S32K148HAT0MLLR adds Ethernet and audio interfaces at the expense of QuadSPI in this package - making FS32K146HAT0MLLR the optimal balance of flash size, CAN-FD scalability, and peripheral flexibility for mid-tier automotive ECUs.

Availability

FS32K146HAT0MLLR is available at Aetrix Electronics and suitable for automotive body control, electric power steering, battery management, and ADAS domain controller applications requiring stable component supply across extended product lifecycles.

Supply support for FS32K146HAT0MLLR 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 leader in automotive semiconductors, delivering secure, reliable, and energy-efficient processors for safety-critical vehicle systems.

The S32K1xx family was engineered specifically for ASIL-B automotive applications - emphasizing functional safety, security, real-time determinism, and long-term supply stability in engine control, chassis, and electrification systems.

FAQ

What is the maximum operating frequency of the FS32K146HAT0MLLR and under what conditions?

The FS32K146HAT0MLLR achieves a maximum operating frequency of 112 MHz in HSRUN mode, which requires VDD ≥ 2.7 V and ambient temperature ≤ +105 °C. At higher ambient temperatures (up to +125 °C), the device must operate in RUN mode at 80 MHz to maintain thermal and electrical reliability. This frequency scaling is enforced by hardware and reflected in the PMC register settings.

Does the FS32K146HAT0MLLR support CAN-FD, and how many instances are available?

Yes, the FS32K146HAT0MLLR integrates three FlexCAN modules, each supporting optional CAN-FD functionality per ISO 11898-1. All three channels are fully functional in the 100-pin LQFP package and can operate simultaneously at bit rates up to 5 Mbps in FD mode, enabling high-bandwidth communication for next-generation vehicle networks.

How does the CSEc security engine function in the FS32K146HAT0MLLR, and are there operational restrictions?

The CSEc engine in the FS32K146HAT0MLLR implements AES-128/256, SHA-256, and RNG per SHE v1.1, but cannot execute in HSRUN mode (112 MHz). When security operations or EEPROM writes/erases are required, the device must transition to RUN mode (80 MHz) to avoid triggering error flags - a hardware-enforced constraint documented in the S32K1xx Data Sheet Rev. 15.

What memory protection mechanisms are implemented in the FS32K146HAT0MLLR?

The FS32K146HAT0MLLR uses NXP's system-level MPU implemented at the AXBS-Lite crossbar switch, assigning access rights per master (CPU, DMA, Ethernet) to protected memory regions. Unlike Arm Core MPU, this system MPU enforces protection for all bus masters - essential for ASIL-B partitioning and preventing unauthorized access to safety-critical code or data segments in the FS32K146HAT0MLLR.

Is the FS32K146HAT0MLLR pin-compatible with other S32K14x devices in the same package?

Yes, all S32K14x devices sharing the 100-pin LQFP package - including FS32K142HAT0MLLR, FS32K144HAT0MLLR, and FS32K148HAT0MLLR - are pin-to-pin compatible per the S32K1xx Data Sheet. This allows hardware reuse across performance tiers while maintaining identical PCB layout, connector placement, and peripheral routing for scalable ECU design.