NXP Semiconductors FS32K144MST0MLHT

Overview

FS32K144MST0MLHT 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/80 MHz RUN 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 +125 °C - deployed in vehicle body control modules requiring functional safety up to ASIL-B.

For engineers reviewing the FS32K144MST0MLHT datasheet, FS32K144MST0MLHT pinout, FS32K144MST0MLHT application, or FS32K144MST0MLHT equivalent, key selection criteria include HSRUN-mode timing constraints for EEPROM/CSEc operations, 144-pin LQFP package compatibility, CAN-FD interface configuration, and ASIL-B–ready memory protection architecture.

Technical Context

The FS32K144MST0MLHT implements a dual-core execution environment via Arm Cortex-M4F core with integrated FPU and DSP extensions, supported by NXP's system-level MPU (not Arm Core MPU) for crossbar-switch–based memory access control across CPU, DMA, and Ethernet masters. Its clock subsystem includes SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), and LPO (128 kHz), enabling precise low-power mode transitions between HSRUN, RUN, STOP, VLPR, and VLPS.

Power management is governed by the PMC, enforcing strict mode separation: CSEc cryptographic operations and FlexNVM EEPROM emulation are prohibited in HSRUN mode and require explicit transition to RUN mode (80 MHz). Analog subsystems include two independent 12-bit SAR ADCs (1 Msps each) with configurable channel routing via TRGMUX, and one analog comparator with integrated 8-bit DAC.

Key Specifications

Pinout & Package

FS32K144MST0MLHT is housed in a 144-pin LQFP package (20 × 20 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow NXP's standardized S32K14x signal mapping, supporting full peripheral availability including all three FlexCAN interfaces, dual ADCs, and Ethernet MAC when configured in compatible variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144MST0MLHT, the FS32K144HFT0MLHT trades peak performance for lower cost and reduced thermal load, while the FS32K146MST0MLHT extends memory and adds Ethernet/SAI - making it ideal for scalable gateway designs where future-proofing justifies higher BOM cost.

Availability

FS32K144MST0MLHT is available at Aetrix Electronics and suitable for automotive body control, electric power steering, and vehicle gateway applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for FS32K144MST0MLHT 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 deep expertise in functional safety and automotive-grade silicon.

The S32K1xx family - including FS32K144MST0MLHT - was designed specifically for ASIL-B automotive control applications, emphasizing robustness, security, and seamless integration into AUTOSAR and ISO 26262 development workflows.

FAQ

What is the maximum operating frequency of the FS32K144MST0MLHT, and under what conditions is it guaranteed?

The FS32K144MST0MLHT achieves 112 MHz in HSRUN mode, but this frequency is only guaranteed at ambient temperatures up to +105 °C. At its full M-grade rating (-40 °C to +125 °C), the device must operate in RUN mode at 80 MHz. This thermal derating ensures reliable operation of flash ECC, SRAM integrity, and analog peripherals across the entire qualified range. The FS32K144MST0MLHT datasheet specifies these limits in Table 5 (Thermal Operating Characteristics).

Does the FS32K144MST0MLHT support CAN-FD, and which FlexCAN modules are enabled in the 144-pin LQFP package?

Yes, the FS32K144MST0MLHT supports CAN-FD on all three FlexCAN modules (CAN0, CAN1, CAN2), and all are fully accessible in the 144-pin LQFP package. Each module complies with ISO 11898-1 and supports bit-rate switching up to 5 Mbps. No pinmux conflicts limit CAN-FD functionality in this package - all required TX/RX differential pairs and associated control signals are routed to dedicated pins per the S32K144 signal description document.

Can CSEc cryptographic operations be executed while the FS32K144MST0MLHT runs at 112 MHz?

No. CSEc (Cryptographic Services Engine) operations - including AES encryption, SHA hashing, and secure key generation - are explicitly prohibited in HSRUN mode (112 MHz) per the FS32K144MST0MLHT datasheet. Attempting such operations triggers error flags. The device must transition to RUN mode (80 MHz) before initiating any CSEc command. This restriction also applies to FlexNVM EEPROM emulation writes/erases, ensuring deterministic timing isolation between safety-critical control and security functions.

What is the purpose of the FlexRAM block in the FS32K144MST0MLHT, and how is it allocated by default?

The FS32K144MST0MLHT includes 4 KB of FlexRAM that can be configured at runtime as either general-purpose SRAM or EEPROM emulation storage. By default, it is initialized as 4 KB of system RAM. When used for EEPROM emulation, it leverages the FlexNVM controller to provide wear-leveling and atomic write semantics - critical for storing calibration data or configuration parameters in automotive applications. This allocation is managed via the FTFC module and does not consume main SRAM resources.

Is the FS32K144MST0MLHT pin-compatible with other S32K14x devices in the 144-pin LQFP package?

Yes - all S32K14x devices offered in the 144-pin LQFP package (including FS32K142, FS32K144, FS32K146, and FS32K148) are pin-to-pin compatible per Figure 3 in the S32K1xx Data Sheet. Peripheral availability depends on signal routing within the die; for example, Ethernet and SAI are absent in FS32K144MST0MLHT but present in FS32K148. However, shared pins (e.g., CAN, ADC, UART) retain identical electrical behavior and function mapping across the family.