STM32F103RET6 - 512KB Flash ARM Cortex-M3 MCU | STMicroelectronics
MPN: STM32F103RET6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.8 | $78.00 |
| 100 | $6.9 | $690.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.6 | $5,600.00 |
Drop-in alternatives for STM32F103RET6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32F103RCT6
β Drop-Inπ Reference alternative (not in catalog)
STM32F103RBT6
β Drop-Inπ Reference alternative (not in catalog)
STM32F105RBT6
β Drop-Inπ Reference alternative (not in catalog)
STM32F103RET6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M3 |
| Max Clock Frequency | 72 MHz |
| Flash Memory | 512 KB |
| SRAM | 64 KB |
| Supply Voltage | 2.0 V to 3.6 V |
| Package | LQFP-64 |
| GPIO Pins | 51 |
| ADC | 3x 12-bit |
| Timers | 4x 16-bit general-purpose, 2x advanced-control |
| Communication Interfaces | USART, SPI, I2C, USB 2.0 FS, CAN |
| Operating Temperature | -40Β°C to +85Β°C |
| DMA Channels | 12 |
| Debug Interface | JTAG, SWD |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
STM32F103RET6 Pin Configuration
| Pin 1 | VBAT β Battery backup for RTC |
| Pin 2 | PC13 β GPIO or RTC output |
| Pin 3 | PC14 β GPIO or OSC32_IN |
| Pin 4 | PC15 β GPIO or OSC32_OUT |
| Pin 5 | PD0 β GPIO or OSC_IN |
| Pin 6 | PD1 β GPIO or OSC_OUT |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VSSA β Analog ground |
| Pin 9 | VDDA β Analog power supply |
| Pin 10 | PA0 β GPIO/ADC12_IN0 |
| Pin 11 | PA1 β GPIO/ADC12_IN1 |
| Pin 12 | PA2 β GPIO/USART2_TX |
| Pin 13 | PA3 β GPIO/USART2_RX |
| Pin 14 | PA4 β GPIO/SPI1_NSS |
| Pin 15 | PA5 β GPIO/SPI1_SCK |
| Pin 16 | PA6 β GPIO/SPI1_MISO |
| Pin 17 | PA7 β GPIO/SPI1_MOSI |
| Pin 18 | PB0 β GPIO/ADC12_IN8 |
| Pin 19 | PB1 β GPIO/ADC12_IN9 |
| Pin 20 | PB2 β GPIO/BOOT1 |
| Pin 21 | PB10 β GPIO/I2C2_SCL |
| Pin 22 | PB11 β GPIO/I2C2_SDA |
| Pin 23 | PB12 β GPIO/SPI2_NSS |
| Pin 24 | PB13 β GPIO/SPI2_SCK |
| Pin 25 | PB14 β GPIO/SPI2_MISO |
| Pin 26 | PB15 β GPIO/SPI2_MOSI |
| Pin 27 | PD8 β GPIO/FSMC_D13 |
| Pin 28 | PD9 β GPIO/FSMC_D14 |
| Pin 29 | PD10 β GPIO/FSMC_D15 |
| Pin 30 | PD11 β GPIO/FSMC_A16 |
| Pin 31 | PD12 β GPIO/FSMC_A17 |
| Pin 32 | PD13 β GPIO/FSMC_A18 |
| Pin 33 | PD14 β GPIO/FSMC_D0 |
| Pin 34 | PD15 β GPIO/FSMC_D1 |
| Pin 35 | PD16 β GPIO/FSMC_D2 |
| Pin 36 | PD17 β GPIO/FSMC_D3 |
| Pin 37 | VSS β Ground |
| Pin 38 | VDD β Power supply |
| Pin 39 | PE0 β GPIO/FSMC_NBL0 |
| Pin 40 | PE1 β GPIO/FSMC_NBL1 |
| Pin 41 | PE2 β GPIO/FSMC_A23 |
| Pin 42 | PE3 β GPIO/FSMC_A19 |
| Pin 43 | PE4 β GPIO/FSMC_A20 |
| Pin 44 | PE5 β GPIO/FSMC_A21 |
| Pin 45 | PE6 β GPIO/FSMC_A22 |
| Pin 46 | PE7 β GPIO/FSMC_D4 |
| Pin 47 | PE8 β GPIO/FSMC_D5 |
| Pin 48 | PE9 β GPIO/FSMC_D6 |
| Pin 49 | PE10 β GPIO/FSMC_D7 |
| Pin 50 | PE11 β GPIO/FSMC_D8 |
| Pin 51 | PE12 β GPIO/FSMC_D9 |
| Pin 52 | PE13 β GPIO/FSMC_D10 |
| Pin 53 | PE14 β GPIO/FSMC_D11 |
| Pin 54 | PE15 β GPIO/FSMC_D12 |
| Pin 55 | PB3 β GPIO/JTDO |
| Pin 56 | PB4 β GPIO/JNTRST |
| Pin 57 | PB5 β GPIO/I2C1_SMBA |
| Pin 58 | PB6 β GPIO/I2C1_SCL |
| Pin 59 | PB7 β GPIO/I2C1_SDA |
| Pin 60 | BOOT0 β Boot mode select |
| Pin 61 | PB8 β GPIO/CAN_RX |
| Pin 62 | PB9 β GPIO/CAN_TX |
| Pin 63 | VSS β Ground |
| Pin 64 | VDD β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32F103RET6 is suitable for 6 applications: Industrial Control Systems, Motor Drives, Medical Devices, Consumer Electronics, Automotive Electronics, IoT and Smart Home.
Industrial Control Systems
The STM32F103RET6 is ideal for industrial control systems due to its 72 MHz Cortex-M3 core, rich timer set, and multiple communication interfaces. In a PLC or industrial controller, the MCU manages digital and analog I/O, executes control algorithms, and communicates via CAN or Modbus. The advanced-control timers generate precise PWM signals for motor drives, while the 12-bit ADCs sample sensors with high resolution. The wide operating temperature range (-40Β°C to +85Β°C) ensures reliability in harsh environments. The 512 KB Flash allows storing complex control firmware and data logging. The CAN interface enables robust networking in factory automation. The MCU's deterministic interrupt handling ensures real-time response, critical for safety-critical control loops. Designers can leverage the STM32Cube firmware library to accelerate development. The LQFP-64 package provides enough GPIOs for interfacing with keypads, displays, and relays. Overall, the STM32F103RET6 offers a cost-effective solution for industrial automation, balancing performance, memory, and peripheral integration.
Recommended
Motor Drives
The STM32F103RET6 excels in motor drive applications, particularly for BLDC and PMSM motors. Its advanced-control timers (TIM1 and TIM8) provide six-channel PWM with complementary outputs and dead-time insertion, essential for three-phase inverter control. The 12-bit ADCs can sample phase currents and DC bus voltage simultaneously, enabling field-oriented control (FOC). The 72 MHz core executes FOC algorithms efficiently, with a typical loop time under 50 Β΅s. The CAN interface allows communication with higher-level controllers in industrial drives. The 512 KB Flash stores motor control firmware, including sensorless algorithms and safety routines. The MCU's 64 KB SRAM supports data buffers for real-time monitoring. The LQFP-64 package offers enough pins for encoder interfaces and fault inputs. Designers can use ST's motor control SDK to speed up development. The wide temperature range and robust peripherals make it suitable for variable frequency drives (VFDs) and servo drives. Overall, the STM32F103RET6 provides a powerful and flexible platform for advanced motor control.
Recommended
Medical Devices
The STM32F103RET6 is suitable for medical devices such as patient monitors, infusion pumps, and diagnostic equipment. Its 72 MHz Cortex-M3 core provides sufficient processing power for signal processing and user interface management. The 12-bit ADCs can acquire biosignals like ECG and SpO2 with adequate resolution. The multiple USART and I2C interfaces enable communication with sensors and displays. The 512 KB Flash allows storing calibration data and firmware updates. The device's low power consumption in sleep modes is beneficial for battery-powered portable medical devices. The wide operating temperature range ensures reliable operation in clinical environments. The MCU's real-time capabilities are critical for monitoring vital signs. The LQFP-64 package is compact, fitting into space-constrained designs. ST's comprehensive documentation and safety manuals support medical certification processes. The CAN interface can be used for networking in hospital settings. Overall, the STM32F103RET6 offers a reliable and feature-rich solution for medical electronics.
Recommended
Consumer Electronics
The STM32F103RET6 is widely used in consumer electronics such as smart home hubs, wearable devices, and gaming peripherals. Its USB 2.0 Full-Speed interface enables easy connectivity to PCs and chargers. The 72 MHz core handles user interfaces, sensor fusion, and communication protocols. The 512 KB Flash provides ample space for application code and assets. The multiple timers generate PWM for LED dimming and buzzer control. The I2C and SPI interfaces connect to displays, touch controllers, and memory. The low power modes extend battery life in portable devices. The LQFP-64 package is cost-effective for mass production. The device's rich peripheral set reduces external component count, lowering BOM cost. ST's ecosystem, including STM32CubeMX and HAL libraries, accelerates development. The CAN interface, though less common in consumer devices, can be used for smart home automation. Overall, the STM32F103RET6 is a versatile MCU for a wide range of consumer products.
Recommended
Automotive Electronics
The STM32F103RET6 is used in automotive applications such as body control modules, dashboard clusters, and telematics. Its CAN interface is essential for in-vehicle networking. The 72 MHz core handles real-time control and communication. The 12-bit ADCs monitor battery voltage, temperature, and sensor inputs. The advanced timers generate PWM for lighting and motor control. The wide operating temperature range (-40Β°C to +85Β°C) meets automotive requirements. The 512 KB Flash stores complex firmware, including diagnostics and bootloaders. The device's robustness and long-term availability make it suitable for automotive production. The LQFP-64 package is widely used in automotive ECUs. ST provides AEC-Q100 qualified versions of this MCU for automotive applications. The CAN interface supports OBD-II diagnostics. The MCU's low power modes help reduce quiescent current in vehicles. Overall, the STM32F103RET6 is a reliable choice for non-safety-critical automotive electronics.
Recommended
IoT and Smart Home
The STM32F103RET6 is a popular choice for IoT and smart home devices due to its balance of performance, memory, and connectivity. The 72 MHz core can run embedded protocols like MQTT and CoAP. The 512 KB Flash allows storing firmware and cloud credentials. The multiple USART and SPI interfaces connect to Wi-Fi, Bluetooth, and Zigbee modules. The 12-bit ADCs read environmental sensors. The low power modes enable battery-powered operation for years. The device's real-time capabilities are useful for local automation. The LQFP-64 package is suitable for compact PCB designs. ST's ecosystem, including STM32Cube and low-power libraries, simplifies development. The CAN interface can be used for industrial IoT gateways. The MCU's security features, such as a unique device ID, support secure cloud authentication. Overall, the STM32F103RET6 provides a solid foundation for smart home hubs, sensors, and actuators.
Recommended
Recommended Products Summary
Engineering reference data for STM32F103RET6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F103RCT6 | STM32F103RBT6 | STM32F105RBT6 |
|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same |
| Flash Memory | 512 KB | 256 KB | 128 KB | 128 KB |
| SRAM | 64 KB | 48 KB | 20 KB | 64 KB |
| Max Clock Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz |
| USB Interface | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 FS Device | USB 2.0 OTG FS |
| CAN Interface | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) | Yes (2.0B) |
| Ethernet MAC | No | No | No | Yes |
| GPIO Pins | 51 | 51 | 51 | 51 |
Key Differentiators
- Larger Flash and SRAM (vs STM32F103RCT6)
- USB OTG support (vs STM32F103RBT6)
- Cost-effective memory size (vs STM32F105RBT6)
Design Notes
Decouple the VDD and VDDA pins with 100 nF ceramic capacitors placed as close as possible to the pins. Additionally, use a 4.7 Β΅F or larger bulk capacitor on the main VDD rail. For VDDA, a 1 Β΅F capacitor is recommended to filter analog noise. Ensure the VBAT pin is connected to a backup battery or tied to VDD if not used.
For the HSE crystal oscillator, place the crystal and load capacitors close to the OSC_IN and OSC_OUT pins, with a ground plane underneath to minimize parasitic capacitance. Use a 8 MHz crystal with 20 pF load capacitors for typical applications. Keep the PCB traces short and avoid routing high-speed signals near the oscillator.
Ensure the BOOT0 pin is properly configured for the desired boot mode. For normal operation, BOOT0 should be tied low through a 10 kΞ© resistor. During programming, BOOT0 can be pulled high to boot from system memory. Also, verify that the NRST pin has a 100 nF capacitor to ground for reliable reset operation.
Compliance Information
RoHS compliant per STMicroelectronics product page. AEC-Q100 qualification not specified for this standard variant; automotive-grade versions may be available.
