NXP Semiconductors FS32K146HAT0MLQR

Overview

FS32K146HAT0MLQR 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 dual 12-bit ADCs - deployed in body control modules, battery management systems, and chassis domain controllers.

For engineers reviewing the FS32K146HAT0MLQR datasheet, FS32K146HAT0MLQR pinout, FS32K146HAT0MLQR application, or FS32K146HAT0MLQR equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value analysis, and two confirmed alternative parts for functional migration paths in ASIL-B automotive designs.

Technical Context

The FS32K146HAT0MLQR 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 configuration. 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 MPU at the crossbar switch level.

Power management integrates five low-power modes (HSRUN, RUN, STOP, VLPR, VLPS), with mandatory mode switching (to RUN at 80 MHz) required for CSEc cryptographic operations or FlexNVM write/erase. Clocking combines SOSC (4–40 MHz), FIRC (48 MHz), SIRC (8 MHz), LPO (128 kHz), and SPLL (up to 112 MHz), enabling precise timing control across safety-critical domains.

Key Specifications

Pinout & Package

FS32K146HAT0MLQR is packaged in a 100-pin LQFP (14 × 14 mm, 0.5 mm pitch), pin-compatible with other S32K14x devices in the same package variant. This package supports full peripheral access including all FlexCAN, ADC, and GPIO resources specified for the K146 variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K146HAT0MLQR, the S32K144 offers lower memory and peripheral count for cost-sensitive tier-2 applications, while the S32K148 adds Ethernet and expanded SRAM for centralized domain control - making the FS32K146 the optimal balance of safety, connectivity, and computational headroom for mid-tier automotive ECUs.

Availability

FS32K146HAT0MLQR is available at Aetrix Electronics and suitable for body control modules, battery management systems, and electric power steering applications requiring stable component supply across automotive production lifecycles.

Supply support for FS32K146HAT0MLQR 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, IoT, and communication infrastructure solutions, with deep expertise in functional safety and secure processing.

The S32K1xx family is designed specifically for automotive electronic control units requiring ASIL-B compliance, featuring integrated safety mechanisms, cryptographic acceleration, and robust power management for harsh environments.

FAQ

What is the maximum operating frequency of the FS32K146HAT0MLQR in HSRUN mode?

The FS32K146HAT0MLQR operates at up to 112 MHz in HSRUN mode, delivering 1.25 Dhrystone MIPS per MHz. This high-frequency mode is restricted to non-security operations - CSEc cryptographic functions and FlexNVM writes must execute in RUN mode at 80 MHz to avoid error flag assertion. The device automatically transitions between modes under software control using the PMC module.

Does the FS32K146HAT0MLQR support CAN-FD, and how many CAN interfaces does it include?

Yes, the FS32K146HAT0MLQR includes three FlexCAN modules, all supporting CAN-FD protocol per ISO 11898-1:2015. Each module provides separate TX/RX pins, message RAM, and flexible bit-rate configuration - enabling simultaneous operation on powertrain, chassis, and body networks. CAN-FD frame payloads up to 64 bytes are handled in hardware with CRC offload.

What safety certifications apply to the FS32K146HAT0MLQR?

The FS32K146HAT0MLQR is qualified to ISO 26262 ASIL-B at the hardware level, with features including ECC on flash and SRAM, system MPU enforcing memory isolation, dual watchdogs (WDOG and EWM), CRC acceleration, and lockstep-capable peripherals. NXP provides FMEDA reports, safety manuals, and diagnostic software libraries - all referenced in the S32K1xx Functional Safety Package v3.0.

How much on-chip SRAM does the FS32K146HAT0MLQR have, and is it protected?

The FS32K146HAT0MLQR integrates 256 KB of on-chip SRAM, fully protected by Error-Correcting Code (ECC) for single-bit error correction and double-bit error detection. This SRAM is partitioned into main SRAM and FlexRAM (4 KB configurable as SRAM or EEPROM emulation), both accessible via the AXBS-Lite crossbar switch with MPU-enforced access rights per master (CPU, DMA, Ethernet).

Is the FS32K146HAT0MLQR pin-compatible with other S32K14x devices in the same package?

Yes, the FS32K146HAT0MLQR in 100-pin LQFP is pin-compatible with all other S32K14x devices offered in that package variant, including S32K142, S32K144, and S32K148. Pin compatibility covers power, ground, debug, clock, reset, and all peripheral signal assignments - enabling hardware reuse across performance tiers while maintaining identical PCB layout and routing.