NXP Semiconductors FS32K148HET0MMHT

Overview

FS32K148HET0MMHT from NXP Semiconductors is an automotive-grade 32-bit Arm Cortex-M4F microcontroller with 2 MB program flash, 256 KB SRAM (both with ECC), 112 MHz HSRUN operation, and integrated CSEc security engine. It features triple FlexCAN with CAN-FD support, 10/100 Mbps Ethernet with IEEE 1588, dual 12-bit ADCs (1 Msps), and operates from -40 °C to +125 °C - designed for body control modules and domain controllers in ASIL-B systems.

For engineers reviewing the FS32K148HET0MMHT datasheet, FS32K148HET0MMHT pinout, FS32K148HET0MMHT application, or FS32K148HET0MMHT equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use-value analysis for automotive timing and communication subsystems, and validated alternative options aligned with S32K1xx family ordering rules.

Technical Context

The FS32K148HET0MMHT 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 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 timing and deterministic real-time response.

Power management includes five operational modes (HSRUN, RUN, STOP, VLPR, VLPS), PMC-controlled clock gating, and mandatory mode switching (e.g., from HSRUN to RUN at 80 MHz) for CSEc cryptographic operations or FlexNVM EEPROM emulation - a hardware-enforced safety constraint confirmed across all S32K148 variants.

Key Specifications

Pinout & Package

FS32K148HET0MMHT is packaged in a 144-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), pin-compatible with other S32K14x devices in the same package variant. This package supports full peripheral access including all three FlexCAN interfaces, Ethernet RMII signals, dual ADC inputs, and 156 GPIOs (with NMI 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 FS32K148HET0MMHT, FS32K146HFT0MLHT reduces memory and removes Ethernet to lower BOM cost in non-zonal gateways, while FS32K148HRT0MLHT trades thermal rating for price in less demanding environments - both preserve functional compatibility and toolchain continuity.

Availability

FS32K148HET0MMHT is available at Aetrix Electronics and suitable for automotive body control modules, zonal gateways, and electric power steering support systems requiring stable component supply across extended product lifecycles.

Supply support for FS32K148HET0MMHT 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, high-performance automotive, industrial, and IoT solutions, with deep expertise in Arm-based MCUs and functional safety certification.

The S32K1xx family - including FS32K148HET0MMHT - was engineered specifically for ASIL-B automotive applications such as body electronics, chassis control, and domain controllers, emphasizing safety, security, and real-time determinism.

FAQ

What is the maximum operating frequency of the FS32K148HET0MMHT and under what conditions?

The FS32K148HET0MMHT achieves 112 MHz in HSRUN mode, but only when supplied within its specified voltage range (2.7 V–5.5 V) and ambient temperature ≤ +125 °C. At 112 MHz, CSEc security operations and FlexNVM EEPROM writes are prohibited; the device must switch to RUN mode (80 MHz) for those functions. This behavior is hardwired and documented in the S32K1xx Data Sheet Rev. 15.

Does the FS32K148HET0MMHT support CAN-FD, and how many instances are available?

Yes, the FS32K148HET0MMHT integrates three independent FlexCAN modules, each supporting CAN-FD per ISO 11898-1:2015. All three channels are accessible in the 144-pin LQFP package and support bit rates up to 5 Mbps in FD mode, with programmable data phase arbitration and flexible payload lengths - confirmed in the S32K1xx Feature Comparison table (Figure 3).

What package type and pin count does the FS32K148HET0MMHT use?

The FS32K148HET0MMHT uses a 144-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch), as defined in the S32K1xx Ordering Information (Figure 5). This package is pin-to-pin compatible with other S32K14x devices in the same footprint, enabling scalable design reuse across memory and feature variants.

How does the CSEc security engine function on the FS32K148HET0MMHT?

The CSEc (Cryptographic Services Engine) on the FS32K148HET0MMHT implements SHE-compliant functions including AES-128/256 encryption/decryption, SHA-256 hashing, true random number generation, and secure boot key management. It operates independently of the CPU core and requires the device to be in RUN mode (80 MHz) - not HSRUN - to execute cryptographic operations or EEPROM emulation, per hardware-enforced constraints in the datasheet.

Is Ethernet functionality available on the FS32K148HET0MMHT, and what standards does it support?

Yes, the FS32K148HET0MMHT includes a full 10/100 Mbps IEEE 802.3 Ethernet MAC with hardware support for IEEE 1588-2008 Precision Time Protocol (PTP), enabling sub-microsecond timestamping accuracy. It supports RMII physical layer interface and is validated for use in automotive time-sensitive networking (TSN) edge nodes - explicitly listed in the S32K1xx Feature Comparison (Figure 3) and confirmed in the "Communication Interfaces" section of the datasheet.