STMicroelectronics STM32F398VET6

Overview

STM32F398VET6 from STMicroelectronics is an ARM® Cortex®-M4 32-bit microcontroller with FPU, 512 KB Flash, 80 KB SRAM (64 KB + 16 KB CCM), flexible static memory controller (FSMC), and integrated analog front-end including four 12-bit ADCs, two 12-bit DACs, seven rail-to-rail comparators, and four operational amplifiers-designed for high-precision motor control, industrial sensing, and capacitive touch HMI systems.

For engineers reviewing the STM32F398VET6 datasheet, STM32F398VET6 pinout, STM32F398VET6 application, or STM32F398VET6 equivalent, key selection considerations include its dual 12-bit DAC channels with 2.4–3.6 V analog supply, 72 MHz FPU-enabled real-time signal processing, FSMC interface for external NOR/PSRAM/NAND, and 85 fast I/Os with 5 V tolerance and capacitive sensing support.

Technical Context

The STM32F398VET6 implements a tightly coupled ARM Cortex-M4 core with hardware floating-point unit (FPU), single-cycle MAC, and DSP instruction set-enabling deterministic execution of complex control algorithms. Its interconnect matrix enables concurrent peripheral access without bus contention, supporting simultaneous ADC sampling, DAC output, and timer-triggered PWM updates.

It integrates a full analog subsystem: four independent 12-bit ADCs (0.20 µs conversion, 12/10/8/6-bit resolution) share no common clock domain with two synchronized 12-bit DACs and four op-amps configurable as programmable gain amplifiers (PGA). All analog blocks operate with independent supply domains (VDDA 1.65–3.6 V, VREFOPAMP 2.4–3.6 V) to minimize noise coupling.

Key Specifications

Pinout & Package

LQFP100 package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, rated for industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mixed-signal microcontroller applications.

Compared with STM32F398VET6, STM32F407VGT6 trades analog integration for raw performance and memory, while STM32G474RET6 emphasizes digital math acceleration over analog channel count-making the F398 uniquely balanced for high-channel-count analog-digital hybrid systems.

Availability

STM32F398VET6 is available at Aetrix Electronics and suitable for industrial motor control, capacitive touch HMI, programmable logic controller I/O modules, and analog signal conditioning units requiring stable component supply and long-term production continuity.

Supply support for STM32F398VET6 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs-with over 40 years of industrial-grade product development experience.

The STM32F3 series targets cost-sensitive, analog-rich embedded applications-designed to integrate high-precision analog peripherals (op-amps, comparators, DACs) with real-time control capabilities in a single chip for motor drives, HMI, and industrial automation.

FAQ

What is the maximum operating frequency and supported voltage range for STM32F398VET6?

The STM32F398VET6 operates at up to 72 MHz using its internal PLL. Its core supply (VDD) is rated for 1.8 V ±8% (1.656–1.944 V), while the analog supply (VDDA) accepts 1.65–3.6 V. This dual-voltage architecture enables low-power digital operation while maintaining analog precision across wide input ranges.

Does STM32F398VET6 support hardware-based capacitive touch sensing?

Yes-it integrates a dedicated Touch Sensing Controller (TSC) supporting up to 24 capacitive sensing channels. It features spread-spectrum modulation, built-in charge transfer, and noise immunity algorithms, enabling robust touchkey, linear slider, and rotary encoder implementations without external components or firmware-intensive polling.

How many independent analog-to-digital converters does STM32F398VET6 include, and what are their key timing specifications?

The device includes four independent 12-bit ADCs, each capable of 0.20 µs conversion time (5 MSPS). They support selectable resolution (12/10/8/6 bits), hardware oversampling, and flexible trigger sources-including timer events and external signals-enabling synchronized multi-channel acquisition for motor phase current and voltage monitoring.

Can STM32F398VET6 directly drive external memory without additional logic?

Yes-the Flexible Static Memory Controller (FSMC) supports asynchronous and synchronous NOR, PSRAM, NAND Flash, and PC Card interfaces with four chip-select lines. It eliminates external address latches or glue logic, allowing direct connection to displays, data loggers, or FPGA co-processors using standard parallel memory protocols.