STMicroelectronics STM32F373CBT6

Overview

STM32F373CBT6 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, 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 in industrial sensor nodes and motor control feedback systems.

For engineers reviewing the STM32F373CBT6 datasheet, STM32F373CBT6 pinout, STM32F373CBT6 application, or STM32F373CBT6 equivalent, key selection criteria include its dual ADC architecture (12-bit SAR + 16-bit SDADC), 5 V-tolerant I/O capability on up to 45 pins, CAN 2.0B interface, USB Full-Speed support, and RTC with alarm/wakeup from Stop/Standby modes.

Technical Context

The STM32F373CBT6 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 high-speed 12-bit SAR ADC (1 µs conversion) and three independent 16-bit sigma-delta ADCs-each with dedicated analog supply rails (2.2–3.6 V)-for simultaneous high-resolution current/voltage sensing and low-noise sensor signal conditioning.

Clock management includes four oscillator sources (HSE 4–32 MHz, LSE 32.768 kHz, HSI 8 MHz with PLL, LSI 40 kHz), supporting precise timing for USB, RTC, and synchronous serial interfaces. Peripheral routing leverages flexible GPIO remapping and a 12-channel DMA controller to offload CPU during high-throughput ADC/DAC or communication operations.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin layout optimized for analog isolation and mixed-signal PCB routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F303CBT6, the STM32F373CBT6 delivers superior analog integration for sensor-rich applications; versus STM32G474RET6, it offers proven stability and lower entry cost but lacks advanced USB features and larger memory.

Availability

STM32F373CBT6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interface panels, and programmable logic controller I/O modules requiring stable component supply and long-term manufacturing continuity.

Supply support for STM32F373CBT6 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, analog, and MEMS technologies for industrial, automotive, and consumer markets.

The STM32F3 series targets cost-effective, high-precision analog-intensive applications-combining Cortex-M4 performance with integrated sigma-delta ADCs, DACs, comparators, and capacitive sensing to replace discrete analog signal chains.

FAQ

What is the maximum operating frequency and supported clock sources for STM32F373CBT6?

The STM32F373CBT6 operates at up to 72 MHz using its internal 8 MHz HSI oscillator with PLL multiplication, or external crystal sources: 4–32 MHz HSE for main system clock and 32.768 kHz LSE for RTC. The PLL supports integer and fractional multiplication factors, enabling precise USB clock derivation (48 MHz) without external crystals.

Does STM32F373CBT6 support hardware CRC calculation and memory protection?

Yes-it includes a dedicated CRC calculation unit compliant with IEEE-802.3 for fast frame checksum generation, and a Memory Protection Unit (MPU) that enforces privilege levels and region-based access control across Flash, SRAM, and peripheral address spaces-supporting secure firmware partitioning and runtime integrity checks.

How many analog-to-digital converters does STM32F373CBT6 integrate, and what are their key distinctions?

The device integrates four ADC subsystems: one 12-bit SAR ADC (16 channels, 1 µs conversion) for fast transient capture, and three independent 16-bit sigma-delta ADCs (up to 21 single-ended channels total) optimized for high-resolution, low-noise measurements like current sensing. Each SDADC has separate analog supply pins (2.2–3.6 V) and configurable oversampling ratios up to 1024×.

Can STM32F373CBT6 operate in low-power modes while maintaining RTC and backup register functionality?

Yes-it supports Sleep, Stop, and Standby low-power modes. In Stop mode, the 32.768 kHz LSE-driven RTC remains active with alarm and periodic wakeup capability, and backup registers retain data when powered by VBAT (1.8–3.6 V). Current consumption drops to 1.7 µA typical in Stop mode with RTC enabled and SRAM retention disabled.