NXP Semiconductors FS32K146HFT0MLHT

Overview

FS32K146HFT0MLHT from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller designed for real-time safety-critical applications. It operates at up to 112 MHz in HSRUN mode, features 2 MB program flash with ECC, 256 KB SRAM with ECC, and supports -40 °C to +125 °C ambient operation. Its integrated CSEc security engine, FlexCAN with CAN-FD, and dual 12-bit ADCs make it suitable for body control modules and gateway ECUs.

For engineers reviewing the FS32K146HFT0MLHT datasheet, FS32K146HFT0MLHT pinout, FS32K146HFT0MLHT application, or FS32K146HFT0MLHT equivalent, key selection considerations include its M-grade temperature rating, 100-pin LQFP package, HSRUN/RUN power mode switching requirement for CSEc/EEPROM operations, and compatibility with S32K1xx SDK and NXP S32 Design Studio.

Technical Context

The FS32K146HFT0MLHT implements a dual-core architecture with Arm Cortex-M4F as primary core (112 MHz HSRUN / 80 MHz RUN) and optional Cortex-M0+ assist core, supporting deterministic real-time execution and ASIL-B functional safety compliance. Its memory subsystem includes ECC-protected 2 MB flash, 256 KB SRAM, and 64 KB FlexNVM for EEPROM emulation - with explicit runtime mode restrictions: CSEc cryptographic operations and FlexNVM writes require transition from HSRUN to RUN mode.

Peripheral integration centers on automotive I/O resilience: three FlexCAN modules (CAN-FD capable), two 12-bit ADCs (up to 32 channels total), eight FlexTimer modules (64 PWM/IC/OC channels), and low-power communication interfaces (LPUART, LPSPI, LPI2C) all support DMA via 16-channel eDMA and DMAMUX. Clocking uses SPLL (up to 112 MHz), FIRC (48 MHz), and multiple low-power oscillators (LPO, SIRC) with configurable gating.

Key Specifications

Pinout & Package

FS32K146HFT0MLHT is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant and moisture-sensitive level 3. Pin assignment follows the S32K14x family pin-to-pin compatibility across 100-pin variants, with dedicated power/ground pairs, multiple VDD/VSS groups for noise isolation, and configurable I/O banks supporting 5 V-tolerant inputs on select pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with FS32K148HFT0MLHT, FS32K146HFT0MLHT removes Ethernet/SAI overhead while retaining identical CAN-FD, ADC, and safety features; versus FS32K144HFT0MLHT, it adds 1 MB flash, 64 KB SRAM, and 16 extra FlexTimer channels - enabling larger AUTOSAR stacks and complex motor control algorithms.

Availability

FS32K146HFT0MLHT is available at Aetrix Electronics and suitable for automotive body control modules, gateway ECUs, electric power steering systems, and battery management monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for FS32K146HFT0MLHT 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 Arm-based microcontrollers and functional safety certification.

The S32K1xx product line delivers scalable, ASIL-B-certified Arm Cortex-M microcontrollers optimized for automotive electronic control units - emphasizing real-time performance, embedded security (CSEc), and robust mixed-signal integration for under-hood and chassis applications.

FAQ

What is the maximum operating frequency of the FS32K146HFT0MLHT and under what conditions?

The FS32K146HFT0MLHT achieves 112 MHz in HSRUN mode, but only within the -40 °C to +105 °C ambient range. At higher temperatures (up to +125 °C), it must operate in RUN mode at 80 MHz. This thermal derating is enforced by hardware to maintain reliability and is documented in the S32K1xx Data Sheet Rev. 15 Section 5.3.

Does the FS32K146HFT0MLHT support CAN-FD, and how many instances are available?

Yes, the FS32K146HFT0MLHT integrates three independent FlexCAN modules, all supporting CAN-FD (ISO/CD 11898-1). Each module operates concurrently with programmable bit rates, flexible data field lengths up to 64 bytes, and built-in message filtering - confirmed in the S32K1xx Feature Comparison Table (Figure 3) and Block Diagram (Figure 1).

Can CSEc cryptographic operations be executed in HSRUN mode on the FS32K146HFT0MLHT?

No. The FS32K146HFT0MLHT explicitly prohibits CSEc execution (including AES, SHA, secure boot) in HSRUN mode (112 MHz). Attempting such operations triggers error flags; the device must switch to RUN mode (80 MHz) first. This restriction is stated repeatedly in the datasheet (Sections 1.1, 2, and 4.2) due to timing and power integrity constraints.

What package type and pin count does the FS32K146HFT0MLHT use?

The FS32K146HFT0MLHT uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), as indicated by the "LH" suffix in its orderable part number per Figure 5 of the S32K1xx Data Sheet. This package is pin-to-pin compatible with other 100-pin S32K14x devices, enabling hardware reuse across memory/configurations.

How much on-chip memory does the FS32K146HFT0MLHT provide, and what types are included?

The FS32K146HFT0MLHT includes 2 MB of program flash memory with ECC, 256 KB of SRAM with ECC, 64 KB of FlexNVM for data flash/EEPROM emulation, and 4 KB of FlexRAM usable as SRAM or EEPROM. These values are specified in the S32K1xx Feature Comparison Table (Figure 3) and Memory section of the datasheet.