STMicroelectronics STM32F373RBT7

Overview

STM32F373RBT7 from STMicroelectronics is a 32-bit ARM® Cortex®-M4 microcontroller with FPU and MPU, operating up to 72 MHz, featuring 128 KB Flash, 32 KB SRAM, four 12-/16-bit ADCs (including three sigma-delta), three 12-bit DACs, two rail-to-rail comparators, and CAN 2.0B interface - deployed in industrial sensor signal conditioning and precision analog front-end systems.

For engineers reviewing the STM32F373RBT7 datasheet, STM32F373RBT7 pinout, STM32F373RBT7 application, or STM32F373RBT7 equivalent, key selection considerations include its dual ADC architecture (SAR + Sigma-Delta), integrated capacitive sensing controller (24 channels), USB 2.0 full-speed support, and 5 V-tolerant I/O capability across 45 pins.

Technical Context

The device integrates an ARM Cortex-M4 core with hardware floating-point unit and memory protection unit, enabling deterministic real-time control with DSP instruction support. Its analog subsystem combines a 12-bit SAR ADC (1 µs conversion, 16-channel) and three independent 16-bit sigma-delta ADCs (up to 21 single-ended inputs), each with dedicated analog supply rails (2.2–3.6 V for SDADC, 2.4–3.6 V for SAR).

Clock management includes four oscillators (4–32 MHz HSE, 32 kHz LSE, 8 MHz HSI, 40 kHz LSI), programmable PLL, and multiple timer resources - including two 32-bit general-purpose timers, three 16-bit timers with PWM/IC/OC, and three basic 16-bit timers dedicated to DAC triggering - supporting synchronized multi-channel analog waveform generation and capture.

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 STM32F303RCT7 and STM32G474RET6, the STM32F373RBT7 uniquely balances sigma-delta ADC depth, capacitive sensing integration, and CAN+USB dual-interface capability - making it optimal for cost-sensitive, analog-intensive industrial edge nodes requiring no external signal chain components.

Availability

STM32F373RBT7 is available at Aetrix Electronics and suitable for industrial sensor modules, HMI touch panels, USB field analyzers, and CAN-based motor control nodes requiring stable component supply and long-term production continuity.

Supply support for STM32F373RBT7 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 ICs, sensors, and automotive semiconductors.

The STM32F3-series targets cost-sensitive, analog-rich embedded applications - emphasizing integrated precision analog peripherals, real-time control, and industrial interface support without sacrificing code density or power efficiency.

FAQ

What is the maximum operating frequency and core type of the STM32F373RBT7?

The STM32F373RBT7 features an ARM Cortex-M4 core with hardware FPU and MPU, running at a maximum frequency of 72 MHz. It delivers 1.25 DMIPS/MHz (Dhrystone 2.1) and supports single-cycle multiplication and hardware division - enabling efficient execution of control algorithms and floating-point math in real-time applications.

Does the STM32F373RBT7 support 5 V tolerant I/Os, and how many pins have this capability?

Yes, the STM32F373RBT7 supports 5 V tolerant I/Os on up to 45 pins across its GPIO ports (PA, PB, PC, PD, PE, PF). This capability allows direct interfacing with legacy 5 V peripherals and simplifies level translation in mixed-voltage systems - confirmed in Section 6.3.14 of the official datasheet (DocID022691 Rev 7).

What analog peripherals are integrated, and how do they differ in resolution and use case?

The device integrates one 12-bit SAR ADC (16-channel, 1 µs conversion) for fast, medium-precision measurements and three independent 16-bit sigma-delta ADCs (up to 21 single-ended channels) optimized for high-resolution, low-noise applications like weigh scales and precision current sensing - each with separate analog supply domains (VDDA for SAR, dedicated SDADC supply for sigma-delta).

Is USB functionality available on-chip, and what are its electrical and protocol specifications?

Yes, the STM32F373RBT7 includes a full-speed USB 2.0 interface (12 Mbit/s) with integrated transceiver, internal pull-up resistors, and descriptor-handling support. It complies with USB 2.0 specification, supports control/bulk/interrupt endpoints, and operates within DC electrical limits of ±0.3 V common-mode and 0.8–2.5 V differential swing - verified in Section 6.3.23 of the datasheet.