STMicroelectronics STM32F373RBT6

Overview

STM32F373RBT6 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU and MPU, operating up to 72 MHz, featuring 256 KB Flash, 32 KB SRAM, three 12-bit DACs, four ADCs (including three 16-bit sigma-delta), two rail-to-rail comparators, and integrated capacitive sensing-designed for precision analog signal acquisition and real-time control in industrial sensor nodes and motor feedback systems.

For engineers reviewing the STM32F373RBT6 datasheet, STM32F373RBT6 pinout, STM32F373RBT6 application, or STM32F373RBT6 equivalent, key selection considerations include its dual ADC architecture (12-bit SAR + 16-bit SDADC), CAN 2.0B interface, USB 2.0 full-speed support, and 5 V-tolerant I/O capability across 45 pins-critical for mixed-voltage industrial HMI and closed-loop power conversion designs.

Technical Context

The STM32F373RBT6 integrates a single-core Cortex-M4 with hardware floating-point unit and memory protection unit, enabling deterministic real-time execution of DSP-intensive algorithms such as motor FOC or active filter compensation. Its clock system supports multiple sources: 4–32 MHz external crystal, 32 kHz RTC oscillator, 8 MHz internal RC with PLL, and 40 kHz LSI.

Analog subsystem architecture includes one 12-bit, 1 µs SAR ADC (16-channel), three independent 16-bit sigma-delta ADCs (up to 21 single-ended channels), three synchronized 12-bit DACs, and two fast comparators with programmable hysteresis and window mode-configured for simultaneous sampling, oversampling, and analog threshold detection without CPU intervention.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303RET6 and STM32G474RET6, the STM32F373RBT6 uniquely balances high-resolution analog acquisition (via SDADCs and TSC) with real-time control capability-making it irreplaceable in applications demanding simultaneous precision sensing and deterministic motor or power loop execution.

Availability

STM32F373RBT6 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, medical sensor hubs, and industrial HMI panels requiring stable component supply and long-term production support.

Supply support for STM32F373RBT6 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STM32F3 series targets cost-sensitive, analog-intensive embedded applications-emphasizing high-precision signal acquisition, real-time control, and human-machine interaction with integrated capacitive sensing and mixed-signal peripherals.

FAQ

What is the maximum operating frequency and core type of the STM32F373RBT6?

The STM32F373RBT6 features an ARM Cortex-M4 core with hardware floating-point unit (FPU) and memory protection unit (MPU), operating at a maximum frequency of 72 MHz. It delivers 1.25 DMIPS/MHz (Dhrystone 2.1) performance and supports single-cycle multiplication and hardware division-enabling efficient execution of DSP algorithms like motor control or digital filtering without external coprocessors.

Does the STM32F373RBT6 support 5 V tolerant I/Os, and how many pins have this capability?

Yes, the STM32F373RBT6 supports 5 V tolerant I/Os on up to 45 pins-including PA0–PA15, PB0–PB15, PC0–PC5, PC10–PC15, and PD0–PD7. This capability allows direct connection to legacy 5 V logic, industrial sensors, and bus transceivers without external level shifters, reducing BOM cost and board space in mixed-voltage systems.

What analog peripherals are integrated, and how do they differ in function?

The STM32F373RBT6 integrates four distinct analog subsystems: one 12-bit, 1 µs SAR ADC (16-channel), three independent 16-bit sigma-delta ADCs (up to 21 single-ended channels), three 12-bit DACs, and two rail-to-rail comparators. The SAR ADC suits fast transient capture (e.g., motor current peaks), while SDADCs provide high-resolution, noise-immune measurements (e.g., metering voltage/current). DACs support programmable references, and comparators enable hardware-triggered events without CPU involvement.

Is the STM32F373RBT6 pin-compatible with other STM32F3 series MCUs in the same package?

No-while the STM32F373RBT6 uses the LQFP64 package, it is not fully pin-compatible with other STM32F3 variants (e.g., STM32F303RBT6 or STM32F334RBT6) due to differences in peripheral mapping, alternate function assignments, and analog pin allocations. Pin compatibility must be verified per specific variant using ST's official pinout comparison tools and datasheet tables.