NXP Semiconductors FS32K146UAT0VMHT

Overview

FS32K146UAT0VMHT 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 supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, LPI2C, FlexIO, and 12-bit ADCs - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146UAT0VMHT datasheet, FS32K146UAT0VMHT pinout, FS32K146UAT0VMHT application, or FS32K146UAT0VMHT equivalent, key selection criteria include its -40 °C to +125 °C ambient rating (M-grade), 100-pin LQFP package, dual-core debug support (SWD/JTAG), and mandatory mode-switching (RUN at 80 MHz) for CSEc or EEPROM operations.

Technical Context

The FS32K146UAT0VMHT implements a dual-voltage-domain Arm Cortex-M4F core with single-precision FPU and DSP extensions, operating up to 112 MHz in HSRUN mode (with voltage scaling) and 80 MHz in RUN mode. Its memory subsystem includes ECC-protected 2 MB flash, 256 KB SRAM, 64 KB FlexNVM for data flash/EEPROM emulation, and 4 KB FlexRAM configurable as SRAM or EEPROM.

Peripherals are managed via AXBS-Lite crossbar switch and eDMA with DMAMUX routing; safety features include System MPU (crossbar-level memory protection), CRC module, WDOG/EWM watchdogs, and CSEc cryptographic engine compliant with SHE specification - all validated for ASIL-B per ISO 26262.

Key Specifications

Pinout & Package

FS32K146UAT0VMHT is housed in a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin compatibility is guaranteed across S32K14x family members sharing this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144UAT0VLQT, FS32K146UAT0VMHT adds 1 MB flash, 64 KB SRAM, CAN-FD on all three FlexCAN modules, and M-grade thermal rating - making it optimal for high-integrity under-hood applications. Against FS32K148UAT0VLQT, it trades Ethernet/SAI for tighter thermal qualification and lower BOM cost where those peripherals are unused.

Availability

FS32K146UAT0VMHT is available at Aetrix Electronics and suitable for automotive body control modules, junction box systems, and smart actuator controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for FS32K146UAT0VMHT 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 FS32K146UAT0VMHT - was designed specifically for automotive electronic control units requiring ASIL-B compliance, robust EMC performance, and long-term supply stability in harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146UAT0VMHT and under what conditions?

The FS32K146UAT0VMHT operates at up to 112 MHz in HSRUN mode and 80 MHz in RUN mode. HSRUN mode requires VDD ≥ 4.5 V and is limited to ambient temperatures ≤105 °C. For CSEc security operations or EEPROM writes/erase, the device must be switched to RUN mode (80 MHz) - attempting these functions in HSRUN triggers error flags. FS32K146UAT0VMHT's 100-pin LQFP package supports full-speed operation with proper thermal design.

Does the FS32K146UAT0VMHT support CAN-FD, and which FlexCAN modules implement it?

Yes, FS32K146UAT0VMHT supports CAN-FD on all three FlexCAN modules (CAN0, CAN1, CAN2), compliant with ISO 11898-1. Each module supports bit-rate switching, FD frame payloads up to 64 bytes, and programmable timing registers. The feature is enabled in hardware and requires no external transceivers - though physical layer compliance depends on external CAN transceiver selection. FS32K146UAT0VMHT's datasheet confirms CAN-FD capability across all FlexCAN instances in the S32K146 variant.

What is the purpose of the CSEc engine in the FS32K146UAT0VMHT, and how does it affect runtime operation?

The Cryptographic Services Engine (CSEc) in FS32K146UAT0VMHT implements SHE-compliant AES-128, SHA-256, ECDSA, and RNG functions for secure boot, firmware authentication, and key management. Critically, CSEc operations - along with EEPROM writes/erase - are prohibited in HSRUN mode (112 MHz); FS32K146UAT0VMHT must be in RUN mode (80 MHz) to execute them. This restriction prevents timing conflicts and ensures deterministic behavior during security-critical sequences.

How does the FS32K146UAT0VMHT achieve ASIL-B compliance, and what safety mechanisms are integrated?

FS32K146UAT0VMHT achieves ASIL-B readiness through hardware-enforced safety mechanisms: System MPU enforces memory access rights per bus master (core/DMA/Ethernet), ECC corrects single-bit errors in flash and SRAM, CRC module validates memory/data integrity, and dual watchdogs (WDOG + EWM) provide independent fault detection. These features are documented in NXP's S32K1xx Functional Safety Manual and validated per ISO 26262 Part 5. FS32K146UAT0VMHT's M-grade thermal rating further supports reliability in safety-critical under-hood locations.

What package type and pin count does the FS32K146UAT0VMHT use, and is it pin-compatible with other S32K14x devices?

FS32K146UAT0VMHT uses a 100-pin LQFP package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad. It is pin-to-pin compatible with all other S32K14x family members offered in the same 100-pin LQFP variant - including FS32K144 and FS32K148 - enabling scalable design reuse. Pin compatibility is explicitly confirmed in the S32K1xx Data Sheet Feature Comparison section and supported by identical IO Signal Description multiplexing across the family.