STMicroelectronics STM32F373CBT7

Overview

STM32F373CBT7 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 ADCs (including three 16-bit sigma-delta), three 12-bit DACs, two rail-to-rail comparators, and integrated capacitive touch sensing-used in industrial sensor hubs and precision analog front-ends.

For engineers reviewing the STM32F373CBT7 datasheet, STM32F373CBT7 pinout, STM32F373CBT7 application, or STM32F373CBT7 equivalent, key selection criteria include its dual ADC architecture (12-bit SAR + 16-bit SDADC), 5 V-tolerant I/O count (up to 45), CAN 2.0B interface, USB 2.0 full-speed support, and LQFP48 package compatibility for space-constrained analog-digital hybrid designs.

Technical Context

The STM32F373CBT7 integrates a single-core Cortex-M4 with hardware floating-point unit and memory protection unit, enabling deterministic real-time signal processing in mixed-signal applications. Its analog subsystem combines a 12-bit 1 µs SAR ADC (16 channels) with three independent 16-bit sigma-delta ADCs supporting up to 21 single-ended or 11 differential inputs-each with dedicated analog supply rails (2.2–3.6 V).

Digital peripherals include three USARTs with LIN/IRDA/ISO7816 support, two Fast Mode Plus I²C interfaces (1 Mbit/s, 20 mA sink), three SPIs (18 Mbit/s), HDMI-CEC, USB 2.0 FS, and a CAN 2.0B controller-all accessible via up to 84 fast I/Os, 45 of which are 5 V tolerant and mappable to external interrupt vectors.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) 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 mixed-signal microcontroller applications.

Compared with STM32F303CBT6, the STM32F373CBT7 adds critical sigma-delta conversion for precision metrology; versus STM32G474RET6, it retains unique SDADC capability at lower clock speed and memory footprint-making it optimal for analog-first embedded systems where resolution trumps raw throughput.

Availability

STM32F373CBT7 is available at Aetrix Electronics and suitable for industrial sensor hubs, medical vital sign monitors, smart energy meters, and motor control interface modules requiring stable component supply and long-term production support.

Supply support for STM32F373CBT7 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 management ICs, sensors, and automotive semiconductors.

The STM32F3-series targets high-performance analog-digital convergence applications, emphasizing precision signal acquisition, real-time control, and integration of specialized peripherals like sigma-delta ADCs and capacitive touch controllers.

FAQ

What is the maximum operating frequency and core type of the STM32F373CBT7?

The STM32F373CBT7 uses an ARM Cortex-M4 core with hardware FPU and MPU, running at a maximum frequency of 72 MHz. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and supports single-cycle multiplication and hardware division-enabling efficient execution of signal processing and control algorithms without external coprocessors.

Does the STM32F373CBT7 support USB and CAN interfaces simultaneously?

Yes, the STM32F373CBT7 integrates both a USB 2.0 full-speed interface (pins PA11/PA12) and a CAN 2.0B controller (pins PD0/PD1), and they operate independently. The device supports concurrent USB host/device communication and CAN bus messaging-verified in ST's AN4993 and UM1757 reference designs for industrial gateway applications.

How many analog-to-digital converters does the STM32F373CBT7 include, and what are their key differences?

The STM32F373CBT7 includes four ADC subsystems: one 12-bit SAR ADC (16 channels, 1 µs conversion) and three independent 16-bit sigma-delta ADCs (up to 21 single-ended or 11 differential channels). The SAR ADC suits fast transient capture (e.g., motor phase currents), while the SDADCs deliver high-resolution, low-noise measurement ideal for precision sensors like load cells and RTDs.

Is the STM32F373CBT7 pin-compatible with other STM32F373xx variants in LQFP48?

Yes, all STM32F373xx devices in LQFP48 (e.g., STM32F373CBT6, STM32F373CBU6) share identical pinouts and electrical characteristics. Differences are limited to Flash size (64/128/256 KB) and temperature grade-allowing seamless migration within the same package without PCB redesign or firmware changes.