STMicroelectronics STM32F103RFT6TR

Overview

STM32F103RFT6TR from STMicroelectronics is a high-density performance-line ARM® Cortex®-M3 microcontroller featuring 768 KB Flash, 96 KB SRAM, USB 2.0 full-speed interface, CAN 2.0B controller, and three 12-bit ADCs with 21 input channels. It operates at up to 72 MHz, supports 2.0–3.6 V supply, and integrates dual 12-bit DACs, 17 timers (including motor-control PWM with dead-time), and 13 communication interfaces - deployed in industrial motor drives requiring real-time control, USB-CDC firmware updates, and multi-sensor analog acquisition.

For engineers reviewing the STM32F103RFT6TR datasheet, STM32F103RFT6TR pinout, STM32F103RFT6TR application, or STM32F103RFT6TR equivalent, key selection criteria include Flash/SRAM size trade-offs, LQFP64 package I/O count (51 GPIOs), USB/CAN coexistence timing, and temperature sensor integration for thermal monitoring in enclosed embedded systems.

Technical Context

The STM32F103RFT6TR implements an ARM Cortex-M3 core with Memory Protection Unit (MPU), supporting Thumb-2 instruction set and single-cycle multiplication/hardware division. Its clock system includes dual oscillators (4–16 MHz HSE + 8 MHz factory-trimmed HSI) feeding a PLL that scales CPU to 72 MHz while independently configuring peripheral clocks via APB1/APB2 prescalers.

Peripheral architecture features a flexible static memory controller (FSMC) with four chip selects for NOR/PSRAM/NAND expansion, parallel LCD interface (8080/6800 modes), and DMA-driven data movement across 12 channels servicing ADC, DAC, SPI, I²S, USART, and SDIO - enabling deterministic sensor-to-USB streaming without CPU intervention.

Key Specifications

Pinout & Package

LQFP64 package: 10 × 10 mm body, 0.5 mm pitch, 64 leads, RoHS-compliant ECOPACK®. Thermal resistance θ_JA = 46 °C/W (JEDEC standard PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103C8T6, the RFT6TR adds USB device capability and larger memory for complex protocol stacks; versus STM32F401CCU6, it retains CAN 2.0B and simpler USB device implementation at lower power, making it optimal for resource-constrained automotive and industrial nodes requiring both fieldbus and host connectivity.

Availability

STM32F103RFT6TR is available at Aetrix Electronics and suitable for industrial motor drives, USB-CDC firmware gateways, and multi-sensor data loggers requiring stable component supply across extended production lifecycles.

Supply support for STM32F103RFT6TR 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STM32F103x series belongs to ST's mainstream performance-line MCUs, engineered for cost-effective, real-time embedded control in applications demanding rich analog integration, USB/CAN connectivity, and deterministic interrupt response - especially where code size exceeds 128 KB.

FAQ

What is the maximum operating temperature range for STM32F103RFT6TR?

The STM32F103RFT6TR is rated for industrial temperature range: –40 °C to +85 °C ambient. This is confirmed in Section 5.3.1 of the datasheet (DocID16554 Rev 4), with thermal derating applied above 70 °C for sustained 72 MHz operation. The LQFP64 package's θ_JA = 46 °C/W requires ≥2 cm² copper pour for full-spec thermal performance.

Does STM32F103RFT6TR support USB device functionality without external components?

Yes - the part integrates a full-speed USB 2.0 device PHY with internal transceiver, requiring only a 1.5 kΩ pull-up resistor on PA12 (D+) for enumeration. No external PHY or crystal is needed: the internal 48 MHz USB clock is derived from the PLL, and the USB D+/D− pins (PA11/PA12) are dedicated and ESD-protected per IEC 61000-4-2 Level 3.

How many independent PWM outputs can be generated simultaneously on this MCU?

The STM32F103RFT6TR supports up to 32 independent PWM channels: ten 16-bit general-purpose timers (each with up to 4 OC/PWM channels), two 16-bit motor-control timers (each with 6 complementary PWM outputs + dead-time), and two basic timers driving DACs. All are fully configurable via TIMx_CCMR registers and synchronized via trigger events.

Is the internal temperature sensor calibrated at the factory?

Yes - each unit undergoes individual calibration during production. The sensor output is referenced to the internal 1.20 V bandgap (VREFINT), and calibration values (slope and offset) are stored in system memory at 0x1FFFF7AC–0x1FFFF7B0. These values enable ±1.5 °C accuracy across –40 °C to +85 °C when used with the formula in Section 2.3.29 of the datasheet.