NXP Semiconductors FX32K146HAT0MLLT

Overview

FX32K146HAT0MLLT 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 FlexCAN with optional CAN-FD, dual 12-bit ADCs (up to 32 channels), CSEc security engine, and operates across -40 °C to +125 °C ambient temperature - deployed in vehicle body control modules requiring functional safety up to ASIL-B.

For engineers reviewing the FX32K146HAT0MLLT datasheet, FX32K146HAT0MLLT pinout, FX32K146HAT0MLLT application, or FX32K146HAT0MLLT equivalent, this page delivers verified technical context, validated package mapping, confirmed pin-level peripheral routing, and real-world automotive use-case alignment - all grounded in NXP's official S32K1xx Rev. 15 datasheet and orderable part number definitions.

Technical Context

The FX32K146HAT0MLLT 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 memory subsystem includes ECC-protected 2 MB flash, 256 KB SRAM, 64 KB FlexNVM for EEPROM emulation, and 4 KB FlexRAM configurable as RAM or EEPROM.

Power management supports five modes (HSRUN, RUN, STOP, VLPR, VLPS), with strict mode-dependent restrictions: CSEc security operations and EEPROM writes require switching from HSRUN (112 MHz) to RUN (80 MHz). Clocking combines FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), SOSC (4–40 MHz), and SPLL (up to 112 MHz).

Key Specifications

Pinout & Package

FX32K146HAT0MLLT is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch), pin-to-pin compatible with other S32K14x devices in the same package variant. This package supports up to 81 GPIOs with interrupt capability, including dedicated pins for CAN, LIN, SPI, I2C, and ADC inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FX32K146HAT0MLLT, the S32K144HAT0MLLT reduces memory and I/O count for lower-cost implementations, while the S32K148HAT0MLLT adds Ethernet, SAI, and full CAN-FD support - making FX32K146HAT0MLLT the optimal balance of performance, safety features, and pin-compatible scalability in mid-tier automotive control units.

Availability

FX32K146HAT0MLLT is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering systems, and vehicle gateway designs requiring stable component supply, long-term lifecycle assurance, and ASIL-B compliant silicon.

Supply support for FX32K146HAT0MLLT 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-grade reliability.

The S32K1xx family - including FX32K146HAT0MLLT - was designed specifically for automotive electronic control units requiring ISO 26262 ASIL-B compliance, robust EMC performance, and seamless integration with AUTOSAR and SAE J1939 stacks.

FAQ

What is the maximum operating frequency of the FX32K146HAT0MLLT and under which conditions?

The FX32K146HAT0MLLT achieves 112 MHz in HSRUN mode, but only when ambient temperature remains ≤105 °C and supply voltage is ≥2.7 V. At higher ambient temperatures (up to +125 °C), operation is limited to 80 MHz in RUN mode - a thermal derating behavior explicitly defined in the S32K1xx datasheet Rev. 15. The FX32K146HAT0MLLT must switch to RUN mode to execute CSEc security functions or FlexNVM writes.

Does the FX32K146HAT0MLLT support CAN-FD, and how many interfaces are available?

Yes, the FX32K146HAT0MLLT supports CAN-FD on all three integrated FlexCAN modules, as confirmed in the S32K1xx feature comparison table (Figure 3). Each FlexCAN module is independently configurable for classic CAN or CAN-FD frames, enabling simultaneous high-speed sensor data transfer and legacy ECU communication - a capability directly implemented in the FX32K146HAT0MLLT silicon.

What package type and pin count does the FX32K146HAT0MLLT use?

The FX32K146HAT0MLLT uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), as specified in NXP's ordering information (Figure 5) and verified in the S32K1xx datasheet Rev. 15. This package is pin-to-pin compatible with other S32K14x devices in the same footprint, allowing scalable migration across memory/peripheral variants without PCB redesign.

How does the FX32K146HAT0MLLT handle security-critical operations like CSEc or EEPROM emulation?

The FX32K146HAT0MLLT requires explicit mode switching: CSEc cryptographic operations and FlexNVM EEPROM writes/erases are prohibited in HSRUN mode (112 MHz) and trigger error flags. The device must transition to RUN mode (80 MHz) before initiating these functions - a hardware-enforced restriction documented in multiple sections of the S32K1xx datasheet Rev. 15. This ensures deterministic timing and voltage stability during security-sensitive sequences in the FX32K146HAT0MLLT.

Is the FX32K146HAT0MLLT qualified for automotive under-hood applications?

Yes, the FX32K146HAT0MLLT is M-grade qualified for ambient temperatures from -40 °C to +125 °C, with junction temperature rated up to 135 °C in RUN mode - meeting under-hood thermal requirements for engine bay and transmission control units. Its qualification includes AEC-Q100 Grade 1 stress testing and functional safety compliance up to ASIL-B per ISO 26262, as stated in the S32K1xx datasheet Rev. 15.