NXP Semiconductors FS32K146UAT0VLHT

Overview

FS32K146UAT0VLHT 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 supports CAN-FD, FlexCAN, LPUART/LIN, LPSPI, LPI2C, FlexIO, and dual 12-bit ADCs - deployed in vehicle body control modules requiring ASIL-B functional safety compliance.

For engineers reviewing the FS32K146UAT0VLHT datasheet, FS32K146UAT0VLHT pinout, FS32K146UAT0VLHT application, or FS32K146UAT0VLHT equivalent, key selection considerations include its V-grade (-40°C to +105°C) thermal rating, 100-pin LQFP package, HSRUN/RUN power mode switching requirement for CSEc/EEPROM operations, and FlexTimer/PDB timing subsystem configuration for motor control and PWM generation.

Technical Context

The FS32K146UAT0VLHT implements a dual-core-capable architecture with Arm Cortex-M4F core (112 MHz HSRUN, 80 MHz RUN) and optional M0+ co-processor support via software partitioning. Its clock system integrates SPLL (up to 112 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and RTC_CLKIN (32 kHz), enabling precise low-power wake-up and deterministic real-time execution.

Power management includes five defined modes - HSRUN, RUN, STOP, VLPR, VLPS - with PMC-controlled clock gating and peripheral isolation. Critical safety functions (CSEc, EEPROM emulation, flash writes) are restricted to RUN mode (80 MHz), enforcing explicit mode transitions verified by hardware error flag assertion in HSRUN.

Key Specifications

Pinout & Package

FS32K146UAT0VLHT is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow the S32K14x family pinout specification, supporting full I/O multiplexing across GPIO, analog, timer, and communication peripherals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K144UAT0VLHT, FS32K146UAT0VLHT delivers higher memory capacity and dual ADCs for enhanced sensor processing; versus FS32K148UAT0VLHT, it omits Ethernet and SAI to reduce cost and power in non-networked control units - all three maintain identical pinout, safety features, and software stack compatibility.

Availability

FS32K146UAT0VLHT is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering ECUs, and vehicle gateway controllers requiring stable component supply across extended production lifecycles.

Supply support for FS32K146UAT0VLHT 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 applications, with deep expertise in Arm-based MCUs and functional safety certification.

The S32K1xx product line was designed specifically for automotive electronic control units requiring ASIL-B compliance, featuring integrated safety mechanisms, cryptographic security, and robust operation across -40°C to +105°C ambient conditions - with FS32K146UAT0VLHT targeting mid-tier body and chassis control applications.

FAQ

What is the maximum operating frequency of the FS32K146UAT0VLHT, and under what conditions is it valid?

The FS32K146UAT0VLHT operates at up to 112 MHz in HSRUN mode, validated across -40°C to +105°C ambient temperature. This frequency is only permitted in HSRUN mode; CSEc security operations and EEPROM writes must be executed in RUN mode at 80 MHz, as confirmed by hardware-enforced error flag assertion if attempted at 112 MHz. The device automatically transitions modes upon secure instruction execution.

Does the FS32K146UAT0VLHT support CAN-FD, and how many CAN interfaces does it include?

Yes, the FS32K146UAT0VLHT includes three FlexCAN modules, each supporting CAN-FD (ISO 11898-1 CD) with data rates up to 5 Mbps. All three interfaces are fully functional in the 100-pin LQFP package and support programmable bit timing, loopback testing, and message buffering - enabling robust multi-bus vehicle networking without external transceivers.

What safety certifications and hardware safety features are implemented in the FS32K146UAT0VLHT?

The FS32K146UAT0VLHT incorporates hardware safety features aligned with ISO 26262 ASIL-B, including ECC on flash and SRAM, System MPU enforced at the AXBS-Lite crossbar, CRC module, dual watchdogs (WDOG and EWM), and lockstep-capable peripherals. It does not include lockstep CPU cores but achieves ASIL-B via architectural redundancy, memory protection, and fault containment - validated in NXP's S32K1xx Functional Safety Manual.

Can the FS32K146UAT0VLHT execute cryptographic operations while running at 112 MHz?

No. The FS32K146UAT0VLHT triggers hardware error flags if CSEc (Cryptographic Services Engine) operations are initiated in HSRUN mode at 112 MHz. Per the datasheet, all CSEc functions - including AES, SHA, and secure boot verification - must be executed in RUN mode at 80 MHz. Software must explicitly switch modes using PMC registers before invoking CSEc commands.

What package type and pin count does the FS32K146UAT0VLHT use, and is it pin-compatible with other S32K14x devices?

The FS32K146UAT0VLHT uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. It is pin-to-pin compatible with all other S32K14x devices offered in the same 100-pin LQFP variant, including FS32K144UAT0VLHT and FS32K148UAT0VLHT - enabling scalable design reuse across performance tiers without PCB redesign.