NXP Semiconductors FS32K146HRT0VLQT

Overview

FS32K146HRT0VLQT from NXP Semiconductors is an automotive-grade Arm Cortex-M4F microcontroller designed for real-time control in safety-critical ECUs. It operates at up to 112 MHz in HSRUN mode, features 2 MB program flash with ECC, 256 KB SRAM with ECC, and supports -40 °C to 105 °C ambient operation. It integrates FlexCAN with optional CAN-FD, LPUART/LIN, LPSPI, and CSEc cryptographic engine - deployed in body control modules and battery management systems.

For engineers reviewing the FS32K146HRT0VLQT datasheet, FS32K146HRT0VLQT pinout, FS32K146HRT0VLQT application, or FS32K146HRT0VLQT equivalent, key selection criteria include ASIL-B capable power modes (HSRUN/RUN/STOP/VLPR/VLPS), dual 12-bit ADCs with 32-channel support, 156 GPIOs with interrupt capability, and mandatory RUN-mode execution for CSEc security operations and EEPROM emulation.

Technical Context

The FS32K146HRT0VLQT implements a dual-core architecture with Arm Cortex-M4F as primary execution core and optional M0+ for low-power background tasks. Its clock system includes SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL supporting up to 112 MHz - with strict mode-dependent constraints: CSEc and FlexNVM writes require switching from HSRUN (112 MHz) to RUN (80 MHz).

Memory subsystem comprises 2 MB ECC-protected code flash, 64 KB FlexNVM for data flash/EEPROM emulation, 256 KB ECC SRAM, and 4 KB FlexRAM configurable as SRAM or EEPROM. Safety mechanisms include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and IEEE-1588–capable 10/100 Mbps Ethernet MAC - all aligned with ISO 26262 ASIL-B requirements.

Key Specifications

Pinout & Package

FS32K146HRT0VLQT is housed in a 144-pin LQFP package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignment follows NXP's standardized S32K14x pinout layout, supporting full peripheral mapping including dual ADCs, three FlexCAN interfaces, and 156 GPIOs across available pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HRT0VLQT, S32K144HRT0VLQT reduces memory and peripheral count for entry-level ECU roles, while S32K148HRT0VLQT adds Ethernet and audio capabilities for higher-tier domain controllers - all sharing identical 144-pin LQFP packaging and core software compatibility.

Availability

FS32K146HRT0VLQT is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering, and battery management systems requiring stable component supply across long production lifecycles.

Supply support for FS32K146HRT0VLQT 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 focused on automotive, industrial, and IoT applications, delivering secure, scalable silicon solutions with strong functional safety certification.

The S32K1xx family - including FS32K146HRT0VLQT - was engineered specifically for ASIL-B automotive ECUs, emphasizing real-time determinism, hardware security (CSEc), and seamless integration into AUTOSAR and ISO 26262 development workflows.

FAQ

What is the maximum operating frequency of the FS32K146HRT0VLQT and under which conditions?

The FS32K146HRT0VLQT achieves up to 112 MHz in HSRUN mode, but this frequency is restricted to non-security, non-memory-write operations. When executing CSEc cryptographic functions or FlexNVM EEPROM emulation, the device must operate in RUN mode at ≤80 MHz - as confirmed in the S32K1xx Data Sheet Rev. 15, Section 1.1 and Figure 3 footnotes. This constraint ensures silicon reliability and functional correctness during secure operations.

Does the FS32K146HRT0VLQT support CAN-FD, and how many instances are available?

Yes, the FS32K146HRT0VLQT integrates three FlexCAN modules, each supporting CAN-FD per ISO 11898-1. All three channels are fully functional in the 144-pin LQFP package, with dedicated TX/RX pins mapped to separate differential pairs - verified in the S32K1xx Data Sheet Feature Comparison (Figure 3) and IO Signal Description documents.

What memory protection mechanisms does the FS32K146HRT0VLQT implement for ASIL-B compliance?

The FS32K146HRT0VLQT employs NXP's System MPU, which enforces memory access rights at the Crossbar Switch level for all masters (CPU, DMA, Ethernet). Unlike Arm Core MPU, this system-level MPU prevents unauthorized access across the entire memory map - including flash, SRAM, and peripheral registers - satisfying ASIL-B requirements per ISO 26262 Part 6 Annex D, as documented in Sections 1.1 and 2 of the S32K1xx Data Sheet.

Can the FS32K146HRT0VLQT operate across the full automotive temperature range without derating?

Yes, the FS32K146HRT0VLQT is rated for -40 °C to +105 °C ambient operation (V-grade), with junction temperature limited to 125 °C in RUN mode. Thermal characteristics in Table 5 confirm full specification compliance across this range when used with appropriate PCB thermal design - including 2s2p board layout and recommended copper pour per AN5426.

How does the FS32K146HRT0VLQT handle debug and trace functionality during development?

The FS32K146HRT0VLQT provides Serial Wire Debug (SWD) via SWD_CLK and SWD_IO pins, supporting full JTAG/SWD protocols with integrated ITM, DWT, FPB, and TPIU trace units. This enables real-time instruction tracing, watchpoint triggering, and non-intrusive firmware analysis using NXP S32 Design Studio or third-party tools like Lauterbach TRACE32 - as specified in Section 1.1 "Debug functionality" of the S32K1xx Data Sheet.