NXP Semiconductors FS32K144ULT0VLLT

Overview

FS32K144ULT0VLLT 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 +105 °C ambient temperature. It targets body control modules, gateway ECUs, and motor control applications requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K144ULT0VLLT datasheet, FS32K144ULT0VLLT pinout, FS32K144ULT0VLLT application, or FS32K144ULT0VLLT equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value analysis, and two validated alternative parts - all grounded in NXP's official S32K1xx Rev. 15 datasheet and orderable part number definitions.

Technical Context

The FS32K144ULT0VLLT 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 background tasks. 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.

Peripherals are organized via AXBS-Lite crossbar switch with eDMA (16-channel), system MPU enforcing ASIL-B memory protection, and dedicated timing resources including eight FlexTimer modules (64 PWM/IC/OC channels), LPIT, LPTMR, PDB, and RTC. Clocking supports SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz).

Key Specifications

Pinout & Package

FS32K144ULT0VLLT is housed in a 144-pin LQFP (VLLT) package with exposed thermal pad. Pin functions are defined per the S32K144-specific IO Signal Description multiplexing table in the Reference Manual. The device supports up to 156 GPIOs, of which 144 are accessible on this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144ULT0VLLT, S32K144HFT0VLLT trades peak performance for reduced power and thermal footprint, while S32K146UFT0VLLT extends functionality with Ethernet and audio - neither is pin-compatible, but both share the same 144-pin LQFP package and toolchain compatibility.

Availability

FS32K144ULT0VLLT is available at Aetrix Electronics and suitable for automotive body electronics, gateway ECUs, and electric power steering systems requiring stable component supply, long lifecycle support, and AEC-Q100 qualification.

Supply support for FS32K144ULT0VLLT 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 over 30 years of automotive MCU heritage.

The S32K1xx family was designed specifically for ASIL-B automotive applications - emphasizing functional safety, security, and robustness in harsh electrical and thermal environments - with FS32K144ULT0VLLT representing the high-memory, high-performance variant in the 144-pin LQFP configuration.

FAQ

What is the maximum operating frequency of the FS32K144ULT0VLLT and under what conditions?

The FS32K144ULT0VLLT achieves 112 MHz in HSRUN mode, but only when ambient temperature remains ≤105 °C and supply voltage is ≥2.7 V. At higher temperatures (e.g., 125 °C), it must operate in RUN mode at 80 MHz. This distinction is enforced by hardware and affects CSEc execution and EEPROM writes, which require mode switching per NXP's datasheet Rev. 15 Section 1.1.

Does the FS32K144ULT0VLLT support CAN-FD, and how many instances are available?

Yes, the FS32K144ULT0VLLT integrates three FlexCAN modules, each supporting CAN-FD per ISO 11898-1. All three are fully functional in the 144-pin LQFP package, with dedicated TX/RX pins assigned per channel. CAN-FD frame payloads up to 64 bytes and bit rates up to 5 Mbps are supported, enabling high-bandwidth diagnostics and software updates.

How does the CSEc security engine function on the FS32K144ULT0VLLT, and are there operational restrictions?

The FS32K144ULT0VLLT includes a Cryptographic Services Engine (CSEc) implementing SHE-compliant AES-128/256, SHA-256, and true random number generation. However, CSEc operations - along with EEPROM writes/erases - are prohibited in HSRUN mode (112 MHz). The device must transition to RUN mode (80 MHz) before initiating these functions, as explicitly stated in the S32K1xx datasheet Rev. 15 Section 1.1 and Figure 3 footnotes.

What package type and pin count does the FS32K144ULT0VLLT use, and is it pin-compatible with other S32K1xx devices?

The FS32K144ULT0VLLT uses a 144-pin LQFP package (VLLT suffix), measuring 20 × 20 mm with 0.5 mm pitch. Per NXP's datasheet Rev. 15 Section 3.1, all S32K1xx devices sharing the same package (e.g., 144-pin LQFP) are pin-to-pin compatible - meaning FS32K144ULT0VLLT can be substituted with other 144-pin variants like S32K146UFT0VLLT or S32K144HFT0VLLT without PCB changes, though peripheral availability may differ.

What memory resources are available on the FS32K144ULT0VLLT, and how is ECC implemented?

The FS32K144ULT0VLLT provides 2 MB of program flash, 256 KB of SRAM, 64 KB of FlexNVM (for EEPROM emulation), and 4 KB of FlexRAM - all protected by Error-Correcting Code (ECC). ECC operates transparently on read/write accesses: single-bit errors are corrected in hardware, and double-bit errors trigger interrupts. This meets ASIL-B requirements for memory integrity in automotive safety-critical applications.