STMicroelectronics STM32F103RCT7

Overview

STM32F103RCT7 from STMicroelectronics is a high-density performance-line Arm® Cortex®-M3 microcontroller featuring 256 KB Flash, 48 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed and CAN 2.0B interfaces, and operates across 2.0–3.6 V supply. It integrates three 12-bit ADCs (21 channels), two 12-bit DACs, 11 timers including motor-control PWM units, and up to 51 GPIOs - deployed in industrial PLCs, motor drives, and USB-connected sensor gateways.

For engineers reviewing the STM32F103RCT7 datasheet, STM32F103RCT7 pinout, STM32F103RCT7 application, or STM32F103RCT7 equivalent, key selection criteria include Flash/SRAM size, USB+CAN dual-interface capability, 72 MHz real-time execution, and LQFP64 package compatibility with legacy STM32F103x design footprints.

Technical Context

The device implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 60 maskable interrupts. Memory subsystem includes 256 KB on-chip Flash with error correction, 48 KB SRAM, and FSMC for external NOR/PSRAM/NAND expansion.

Clock system comprises four oscillators: 4–16 MHz HSE crystal input, 8 MHz factory-trimmed HSI RC, 40 kHz LSI RC, and 32.768 kHz LSE for RTC - all feeding a programmable PLL delivering 72 MHz system clock. Peripheral interconnect uses AHB/APB buses with DMA support for 12 channels servicing ADC, DAC, USART, SPI, I²C, and SDIO.

Key Specifications

Pinout & Package

LQFP64 package: 10 × 10 mm body, 0.5 mm pitch, 64-pin quad flat with exposed thermal pad (ECOPACK® compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103VCT6, the STM32F103RCT7 offers identical peripheral set in a smaller LQFP64 footprint - ideal for space-constrained designs; versus STM32F401RET6, it trades floating-point performance and memory for CAN integration and lower power consumption in active mode.

Availability

STM32F103RCT7 is available at Aetrix Electronics and suitable for industrial motor control, USB HID devices, smart sensor gateways, and energy metering front-ends requiring stable component supply over extended production lifecycles.

Supply support for STM32F103RCT7 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 analog products for industrial, automotive, and consumer markets.

The STM32F1 Series targets cost-sensitive, high-reliability embedded applications demanding rich analog integration, real-time responsiveness, and long-term availability - especially in industrial automation and field equipment.

FAQ

What is the maximum operating temperature range for STM32F103RCT7?

The STM32F103RCT7 is specified for industrial temperature range: –40 °C to +85 °C. This rating applies to all electrical characteristics in the datasheet, including Flash programming, ADC accuracy, and USB timing compliance. Thermal derating is not required within this range under standard PCB layout conditions with adequate copper pour.

Does STM32F103RCT7 support USB device enumeration without external components?

Yes - the part integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on D+ and internal voltage regulators. Only a single 1.5 kΩ pull-up resistor on D+ (enabled via software) and proper PCB layout per AN297 are required for reliable enumeration on Windows, Linux, and macOS hosts.

Can the internal 8 MHz RC oscillator be used as system clock source without calibration?

Yes - the factory-trimmed 8 MHz HSI oscillator achieves ±1% accuracy across temperature and voltage, sufficient for UART communication (up to 115.2 kbps at 8 MHz) and general-purpose timing. For USB or CAN, however, an external crystal (4–16 MHz) is mandatory to meet ±0.25% clock tolerance requirements.

How many independent ADC conversions can be performed simultaneously on STM32F103RCT7?

The device contains three independent 12-bit ADCs (ADC1, ADC2, ADC3), each capable of autonomous conversion sequences. While they share common clock and trigger sources, their data registers, injected channels, and scan modes operate separately - enabling true concurrent sampling of up to 21 analog signals across three domains (e.g., motor phase currents, bus voltage, temperature).