NXP Semiconductors FX32K144ULT0VLHT

Overview

FX32K144ULT0VLHT 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 operation, and integrated CSEc security engine. It features dual 12-bit ADCs (32-channel total), three FlexCAN modules (CAN-FD capable), and operates from -40 °C to 105 °C in 144-pin LQFP packaging - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FX32K144ULT0VLHT datasheet, FX32K144ULT0VLHT pinout, FX32K144ULT0VLHT application, or FX32K144ULT0VLHT equivalent, key selection considerations include its 112 MHz HSRUN mode limitation for CSEc/EEPROM operations, 144-pin LQFP mechanical footprint, dual ADC channel count, FlexCAN FD support level, and voltage range compatibility (2.7–5.5 V) with automotive 12 V systems.

Technical Context

The FX32K144ULT0VLHT implements a dual-core architecture with Arm Cortex-M4F as primary execution core (112 MHz HSRUN / 80 MHz RUN) and optional M0+ co-processor support via software configuration. Its clock system integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), with configurable clock gating per peripheral domain.

Power management includes five defined modes (HSRUN, RUN, STOP, VLPR, VLPS), where HSRUN enables peak performance but disables concurrent CSEc or EEPROM writes - requiring runtime mode switching to RUN (80 MHz) for secure operations. Memory subsystem uses ECC on all flash and SRAM blocks, with FlexNVM enabling EEPROM emulation within 64 KB data flash.

Key Specifications

Pinout & Package

FX32K144ULT0VLHT is housed in a 144-pin LQFP package (20 × 20 mm, 0.5 mm pitch) with exposed thermal pad. This RoHS-compliant package supports reflow soldering per JEDEC J-STD-020 and provides 156 GPIOs, including dedicated pins for SOSC, RTC_CLKIN, SWD debug, and multiple CAN transceiver interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FX32K144ULT0VLHT, S32K144WLT0VLHT trades 112 MHz performance for extended temperature tolerance, while S32K146ULT0VLHT adds Ethernet/audio capability at the cost of flash capacity - both retain identical 144-pin LQFP footprint and core peripheral sets for drop-in layout reuse.

Availability

FX32K144ULT0VLHT is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering units, battery management systems, and zonal gateways requiring stable component supply across extended product lifecycles.

Supply support for FX32K144ULT0VLHT 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The S32K1xx family - including FX32K144ULT0VLHT - was designed specifically for automotive electronic control units requiring ASIL-B functional safety, secure over-the-air updates, and robust operation across harsh environmental conditions.

FAQ

What is the maximum operating frequency of the FX32K144ULT0VLHT and under what conditions?

The FX32K144ULT0VLHT achieves a maximum operating frequency of 112 MHz in HSRUN mode, contingent on supply voltage ≥2.7 V and ambient temperature ≤105 °C. Operation above 105 °C requires switching to RUN mode (80 MHz). The device will not sustain 112 MHz operation outside these validated electrical and thermal boundaries per its AEC-Q100 qualification.

Does the FX32K144ULT0VLHT support CAN-FD, and how many instances are available?

Yes, the FX32K144ULT0VLHT integrates three independent FlexCAN modules, each supporting CAN-FD (ISO 11898-1) with bit rates up to 5 Mbps and flexible data payloads. All three modules are accessible in the 144-pin LQFP package, with dedicated TX/RX pins assigned per instance and full DMA support for zero-CPU-load message handling.

Can the FX32K144ULT0VLHT execute CSEc cryptographic operations at 112 MHz?

No. The FX32K144ULT0VLHT triggers error flags if CSEc (Security) or EEPROM write/erase commands are issued while operating in HSRUN mode (112 MHz). Per NXP documentation, the device must transition to RUN mode (80 MHz) to safely execute these secure operations - a hardware-enforced restriction to ensure timing predictability and fault containment.

What memory protection mechanisms are implemented in the FX32K144ULT0VLHT?

The FX32K144ULT0VLHT implements NXP's System MPU (Memory Protection Unit) at the crossbar switch level - enforcing access rights per master (CPU, DMA, Ethernet) across protected memory regions. It also includes ECC on all flash and SRAM blocks, CRC acceleration hardware, and dual watchdogs (WDOG and EWM) to detect and recover from memory corruption or runaway code execution.

Is the FX32K144ULT0VLHT pin-compatible with other S32K14x devices in the same package?

Yes. All S32K14x devices offered in the 144-pin LQFP package - including FX32K144ULT0VLHT, S32K144WLT0VLHT, and S32K146ULT0VLHT - are fully pin-to-pin compatible. Peripheral availability varies by part number (e.g., Ethernet only on K146), but signal mapping, power pin locations, and debug interface pins remain identical across the family in this package option.