NXP Semiconductors FS32K146HAT0VLHR

Overview

FS32K146HAT0VLHR 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 105 °C in LQFP-100 package - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146HAT0VLHR datasheet, FS32K146HAT0VLHR pinout, FS32K146HAT0VLHR application, or FS32K146HAT0VLHR equivalent, key selection considerations include HSRUN/RUN mode switching constraints for CSEc/EEPROM operations, FlexCAN FD channel count per package, FlexRAM configuration options (SRAM vs EEPROM emulation), and thermal derating above 105 °C ambient.

Technical Context

The FS32K146HAT0VLHR implements a dual-core architecture with Arm Cortex-M4F as primary execution core (112 MHz HSRUN / 80 MHz RUN) and optional M0+ for low-power background tasks. Its AXBS-Lite crossbar switch enables concurrent access to flash, SRAM, and peripherals by CPU, DMA, and Ethernet MAC.

Power management includes five defined modes (HSRUN, RUN, STOP, VLPR, VLPS), with mandatory mode transition from HSRUN to RUN (80 MHz) for CSEc cryptographic operations or FlexNVM EEPROM writes - enforced via hardware error flag generation if violated. Memory protection uses NXP's system MPU at crossbar level, not Arm Core MPU.

Key Specifications

Pinout & Package

FS32K146HAT0VLHR is housed in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow S32K14x family standard I/O multiplexing; all GPIOs support interrupt capability and configurable pull-up/down.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HAT0VLHR, FS32K148HAT0VLHR adds Ethernet and audio interfaces at higher cost and power, while FS32K144HAT0VLHR reduces memory capacity and removes QuadSPI - making FS32K146HAT0VLHR the optimal balance of scalability, feature set, and cost for mid-tier automotive ECUs.

Availability

FS32K146HAT0VLHR is available at Aetrix Electronics and suitable for automotive body control modules, electric power steering units, gateway ECUs, and ADAS sensor hubs requiring stable component supply across extended production lifecycles.

Supply support for FS32K146HAT0VLHR 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 FS32K146HAT0VLHR - was designed specifically for automotive electronic control units requiring ASIL-B compliance, robust security, and real-time performance in harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146HAT0VLHR, and under what conditions?

The FS32K146HAT0VLHR achieves 112 MHz in HSRUN mode, but this frequency is restricted to non-security/non-EEPROM workloads. When executing CSEc cryptographic operations or FlexNVM EEPROM writes/erases, the device must operate in RUN mode at 80 MHz - a hardware-enforced transition to prevent bus conflicts and ensure data integrity. This behavior is documented in the S32K1xx Data Sheet Rev. 15, Section 1.1 and Figure 3 footnotes.

Does the FS32K146HAT0VLHR support CAN-FD, and how many channels are available?

Yes, the FS32K146HAT0VLHR integrates three FlexCAN modules, each supporting CAN-FD (ISO 11898-1) with data phase bit rates up to 5 Mbps. All three channels are fully functional in the 100-pin LQFP package (FS32K146HAT0VLHR), with dedicated TX/RX pins assigned per channel - confirmed in the S32K1xx Data Sheet Rev. 15, Figure 3 and "Features Comparison" table.

What memory protection mechanisms does the FS32K146HAT0VLHR implement for functional safety?

The FS32K146HAT0VLHR employs NXP's system-level Memory Protection Unit (MPU) implemented at the AXBS-Lite crossbar switch, granting per-master (CPU, DMA, Ethernet) access rights to protected memory regions. It also includes ECC on 2 MB flash and 256 KB SRAM, CRC module, internal WDOG, and external EWM - collectively enabling ASIL-B compliance per ISO 26262, as specified in the S32K1xx Data Sheet Rev. 15, Sections 1.1 and 3.1.

Can the FS32K146HAT0VLHR operate from a 3.3 V supply, and what are the voltage limits?

Yes, the FS32K146HAT0VLHR supports 2.7 V to 5.5 V single-supply operation, fully compatible with 3.3 V systems. The absolute maximum rating is 5.8 V for ≤60 seconds cumulative lifetime (non-reset condition), and VDD must remain within 2.7–5.5 V for guaranteed functionality. VDDA and VREFH must be tied to the same source with ≤0.1 V differential - details are in Tables 3 and 5 of the S32K1xx Data Sheet Rev. 15.

What is the purpose of FlexRAM in the FS32K146HAT0VLHR, and how is it configured?

The FS32K146HAT0VLHR includes 4 KB of FlexRAM that can be dynamically allocated either as general-purpose SRAM or as EEPROM emulation storage - managed by NXP's EEPROM driver library. Configuration is performed at runtime via FTFC registers; no hardware rework is needed. This flexibility replaces external EEPROM in logging and calibration storage applications, as described in the "Memories and Memory Interfaces" chapter of the S32K1xx Reference Manual.