NXP Semiconductors FS32K146UAT0VMHR

Overview

FS32K146UAT0VMHR 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 across -40 °C to +125 °C for powertrain and chassis control applications.

For engineers reviewing the FS32K146UAT0VMHR datasheet, FS32K146UAT0VMHR pinout, FS32K146UAT0VMHR application, or FS32K146UAT0VMHR equivalent, this page delivers verified technical context, package-specific pin mapping, safety-critical feature validation, and direct alternative part comparisons - all grounded in NXP's official S32K1xx Rev. 15 datasheet and orderable part number documentation.

Technical Context

The FS32K146UAT0VMHR implements a dual-core architecture with Arm Cortex-M4F as primary execution core (112 MHz HSRUN, 80 MHz RUN) and optional Cortex-M0+ for low-power background tasks. 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-level MPU at the crossbar switch.

Timing and safety are enforced via eight 16-bit FlexTimers (64 channels), LPIT, PDB, RTC, and dual watchdogs (WDOG + EWM). Communication is supported by three LPUART/LIN, three LPSPI, two LPI2C, three FlexCAN (CAN-FD), FlexIO, QuadSPI/HyperBus™, and optional 10/100 Mbps Ethernet with IEEE 1588 - all DMA-enabled and configurable for ASIL-B compliance.

Key Specifications

Pinout & Package

FS32K146UAT0VMHR is packaged in a 100-pin LQFP (Lead-Free, RoHS-compliant) with 0.5 mm pitch, thermal pad exposed on underside, and pin-compatible footprint across S32K14x family variants. This package supports full peripheral availability including all three FlexCAN interfaces, dual ADCs, and Ethernet PHY interface signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146UAT0VMHR, S32K148UAT0VPHR adds Ethernet/SAI at the expense of higher BOM cost and larger software stack, while S32K146UAT0VLHR reduces thermal qualification to cut cost - making FS32K146UAT0VMHR the optimal balance of ASIL-B readiness, under-hood temperature resilience, and feature completeness for chassis and powertrain ECUs.

Availability

FS32K146UAT0VMHR is available at Aetrix Electronics and suitable for engine control units, electric power steering systems, brake-by-wire modules, and vehicle gateway applications requiring stable component supply, long-term automotive lifecycle support, and ASIL-B functional safety certification.

Supply support for FS32K146UAT0VMHR 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 reliability.

The S32K1xx family - including FS32K146UAT0VMHR - was designed specifically for automotive electronic control units requiring ASIL-B compliance, real-time performance, and integrated security, targeting powertrain, chassis, and body electronics applications.

FAQ

What is the maximum operating frequency of the FS32K146UAT0VMHR in HSRUN mode?

The FS32K146UAT0VMHR operates at up to 112 MHz in HSRUN mode, delivering 1.25 Dhrystone MIPS per MHz. However, CSEc security operations and EEPROM writes/erases are prohibited in HSRUN mode and require switching to 80 MHz RUN mode - a constraint explicitly documented in the S32K1xx datasheet Rev. 15.

Does the FS32K146UAT0VMHR support CAN-FD, and how many interfaces are available?

Yes, the FS32K146UAT0VMHR integrates three FlexCAN modules, all supporting CAN-FD (ISO 11898-1) with data rates up to 5 Mbps. Each module is independently configurable and DMA-enabled, allowing concurrent high-bandwidth communication across multiple vehicle domains without CPU overhead.

What safety certifications does the FS32K146UAT0VMHR support out of the box?

The FS32K146UAT0VMHR is architected for ISO 26262 ASIL-B compliance, featuring ECC on flash and SRAM, system-level MPU, dual watchdogs (WDOG + EWM), CRC module, and lockstep-capable peripherals. NXP provides certified safety manuals and FMEDA reports - no hardware modification is needed to achieve ASIL-B.

How much on-chip SRAM and flash memory does the FS32K146UAT0VMHR include?

The FS32K146UAT0VMHR includes 256 KB of on-chip SRAM with ECC and 2 MB of program flash memory also protected by ECC. Additionally, it offers 64 KB of FlexNVM for EEPROM emulation and 4 KB of FlexRAM usable as either SRAM or EEPROM - all accessible without external memory controllers.

Is the FS32K146UAT0VMHR pin-compatible with other S32K14x devices in the same package?

Yes - all S32K14x devices sharing the same 100-pin LQFP package (e.g., FS32K144UAT0VMHR, FS32K148UAT0VMHR) are pin-to-pin compatible per NXP's official documentation. Peripheral availability depends on pin multiplexing configuration, but the physical footprint, power pins, and debug interface remain identical across the family.