NXP Semiconductors FS32K144HRT0MLHR

Overview

FS32K144HRT0MLHR 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 +125 °C for under-hood automotive control applications.

For engineers reviewing the FS32K144HRT0MLHR datasheet, FS32K144HRT0MLHR pinout, FS32K144HRT0MLHR application, or FS32K144HRT0MLHR equivalent, this page delivers verified technical context, package-specific pin mapping, safety-critical power mode behavior, real-world automotive use cases, and validated alternative part options aligned to ISO 26262 ASIL-B requirements.

Technical Context

The FS32K144HRT0MLHR implements a dual-core-capable architecture with Arm Cortex-M4F core running at up to 112 MHz in HSRUN mode (80 MHz in RUN mode), featuring single-precision FPU, DSP extensions, and NVIC with configurable priority levels. Its memory subsystem includes 2 MB program flash with ECC, 64 KB FlexNVM for EEPROM emulation, and 256 KB SRAM with ECC - all protected by NXP's system MPU at crossbar level.

Power management is governed by PMC supporting five modes: HSRUN, RUN, STOP, VLPR, VLPS - with strict mode-dependent restrictions: CSEc cryptographic operations and FlexNVM writes/erases are prohibited in HSRUN mode and require transition to RUN mode (80 MHz). Clocking includes SOSC (4–40 MHz), FIRC (48 MHz), SPLL (up to 112 MHz), and LPO (128 kHz) for deterministic low-power timing.

Key Specifications

Pinout & Package

FS32K144HRT0MLHR is housed in a 144-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with full pin-to-pin compatibility across S32K14x family members sharing this footprint. The package supports 156 GPIOs (with interrupt capability), including dedicated pins for CAN FD transceivers, ADC reference inputs, and external clock sources.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144HRT0MLHR, S32K142HRT0MLHR reduces memory and peripheral headroom for cost-sensitive tier-2 modules, while S32K146HRT0MLHR extends connectivity for centralized domain controllers - both maintain identical M-grade temperature rating, CSEc security, and pin-compatible layout.

Availability

FS32K144HRT0MLHR is available at Aetrix Electronics and suitable for electric power steering, brake-by-wire control units, and body control modules requiring stable component supply across automotive production lifecycles.

Supply support for FS32K144HRT0MLHR 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, high-performance automotive, industrial, and IoT solutions, with deep expertise in functional safety and ASIL-certified design flows.

The S32K1xx family - including FS32K144HRT0MLHR - was engineered specifically for automotive electronic control units demanding ASIL-B compliance, robust security, and real-time deterministic performance in harsh environments.

FAQ

What is the maximum operating frequency of FS32K144HRT0MLHR and under what conditions?

The FS32K144HRT0MLHR operates at up to 112 MHz in HSRUN mode, which requires ambient temperature ≤ +105 °C and supply voltage ≥ 2.7 V. At +125 °C ambient (M-grade), maximum frequency is limited to 80 MHz in RUN mode. This thermal derating ensures silicon reliability and timing closure across the full automotive temperature range.

Does FS32K144HRT0MLHR support CAN-FD, and how many instances are available?

Yes, FS32K144HRT0MLHR integrates three independent FlexCAN modules, each supporting CAN-FD protocol (ISO 11898-1:2015) with data rates up to 5 Mbps. All three modules are accessible in the 144-pin LQFP package, with dedicated TX/RX pins routed to separate CAN transceiver interfaces.

Can FS32K144HRT0MLHR execute CSEc cryptographic operations in HSRUN mode?

No. FS32K144HRT0MLHR prohibits CSEc execution (including AES encryption, SHA hashing, or key generation) while in HSRUN mode (112 MHz). The device must transition to RUN mode (80 MHz) before initiating any CSEc command - attempting otherwise triggers error flags and halts secure operation.

What memory protection mechanisms are implemented in FS32K144HRT0MLHR?

FS32K144HRT0MLHR employs NXP's system MPU - a crossbar-level memory protection unit that assigns access rights (read/write/execute) per master (CPU, DMA, Ethernet) to each memory region. Unlike Arm Core MPU, it protects all bus masters and enforces ASIL-B partitioning without relying on core-only enforcement.

Is FS32K144HRT0MLHR pin-compatible with other S32K14x devices in the same package?

Yes. All S32K14x devices offered in the 144-pin LQFP package - including FS32K142HRT0MLHR, FS32K144HRT0MLHR, and FS32K146HRT0MLHR - are fully pin-to-pin compatible. Peripheral availability depends on internal silicon configuration, not pin assignment, enabling seamless migration within the same footprint.