STMicroelectronics STM32F103RCT7TR

Overview

STM32F103RCT7TR from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 256 KB Flash, 48 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B controller. It integrates three 12-bit ADCs (21 channels), two 12-bit DACs, 11 timers including motor-control PWM units with dead-time generation, and supports industrial motor control, PLC I/O modules, and USB-CAN gateway designs.

For engineers reviewing the STM32F103RCT7TR datasheet, STM32F103RCT7TR pinout, STM32F103RCT7TR application, or STM32F103RCT7TR equivalent, key selection criteria include Flash/SRAM size, USB+CAN dual-interface capability, 112 I/O count, LQFP64 package compatibility, and industrial temperature range (-40°C to +105°C) support.

Technical Context

This MCU implements a Harvard-architecture Cortex-M3 core with single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 60 maskable interrupts. Its memory subsystem includes 256 KB of embedded Flash with error correction, 48 KB SRAM, and FSMC for external NOR/PSRAM/NAND expansion.

The peripheral set is optimized for real-time control: dual 12-bit ADCs with triple-sample-and-hold, two independent 12-bit DACs, four 16-bit general-purpose timers with quadrature encoder input, and dedicated 16-bit motor-control timers with programmable dead-time insertion and emergency stop input.

Key Specifications

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified, with exposed thermal pad for enhanced heat dissipation in continuous operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103VCT6, the STM32F103RCT7TR offers identical peripheral functionality in a smaller LQFP64 footprint - reducing PCB area and cost for space-constrained industrial gateways. Versus STM32F401RET6, it retains CAN 2.0B essential for automotive diagnostics and industrial fieldbus interoperability, despite lower Flash capacity.

Availability

STM32F103RCT7TR is available at Aetrix Electronics and suitable for industrial motor drives, USB-CAN protocol bridges, and smart power metering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM32F103RCT7TR 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.

The STM32F103 series targets cost-sensitive, high-reliability embedded applications in industrial automation and consumer appliances, emphasizing robust analog integration, dual-bus connectivity (USB + CAN), and extended temperature operation.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32F103RCT7TR operates at up to 72 MHz with typical active current of 36 mA at 72 MHz, 3.3 V, and 25°C when executing code from Flash. This value scales linearly with clock frequency and includes core, memory, and basic peripheral activity - measured per DS5792 Rev 13 Section 5.3.5.

Does this MCU support hardware encryption or secure boot features?

No. The STM32F103RCT7TR does not include hardware cryptographic accelerators, TRNG, or secure boot ROM. Security relies on software-implemented algorithms and external secure elements. Later families like STM32L4 or STM32H7 integrate AES, PKA, and secure firmware install capabilities.

Can the internal RC oscillators replace the external crystal for USB timing?

No. USB full-speed operation requires ±0.25% clock accuracy, which only the 4–16 MHz external crystal oscillator meets. The internal 8 MHz RC has ±1% tolerance and cannot be trimmed to USB specification - an external crystal is mandatory for reliable USB enumeration.

What is the purpose of the VBAT pin and how is it used in practice?

VBAT supplies backup power to the RTC and 42 bytes of backup registers during main power loss. It accepts 1.8–3.6 V and typically connects to a coin cell (e.g., CR1220) or supercapacitor. When VDD drops below POR threshold, the RTC continues counting and retains calibration data - critical for timestamping in energy meters and alarm systems.