STM32F103C8T6 - 64KB Flash ARM Cortex-M3 MCU | STMicroelectronics
MPN: STM32F103C8T6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.28 | $1.28 |
| 10 | $1.24 | $12.40 |
| 100 | $1.18 | $118.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $1.02 | $1,020.00 |
| 1,500 | $1 | $1,500.00 |
Drop-in alternatives for STM32F103C8T6 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:
STM32F103CBT6
β 99,999 In Stock
$2.76 / Unit
View Datasheet βSTM32F103R8T6
π Reference alternative (not in catalog)
STM32F103C8T7
π Reference alternative (not in catalog)
STM32F103C8T6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M3 |
| Max Clock Speed | 72 MHz |
| Flash Memory | 64 KB |
| SRAM | 20 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| GPIO Pins | 37 |
| ADC | 2x 12-bit, 10 channels |
| Timers | 4x 16-bit (3 general-purpose, 1 advanced) |
| Communication Interfaces | 2x I2C, 2x SPI, 3x USART, USB 2.0 FS, CAN 2.0B |
| DMA | 7 channels |
| Debug Interface | JTAG, SWD |
| Package | LQFP-48 (7x7 mm) |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
| Low Power Modes | Sleep, Stop, Standby |
STM32F103C8T6 Pin Configuration
| Pin 1 | VBAT β Battery backup supply for RTC |
| Pin 2 | PC13 β GPIO / RTC tamper |
| Pin 3 | PC14 β GPIO / OSC32_IN |
| Pin 4 | PC15 β GPIO / OSC32_OUT |
| Pin 5 | PD0 β GPIO / OSC_IN |
| Pin 6 | PD1 β GPIO / 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 / ADC_IN0 / WKUP |
| Pin 11 | PA1 β GPIO / ADC_IN1 |
| Pin 12 | PA2 β GPIO / ADC_IN2 / USART2_TX |
| Pin 13 | PA3 β GPIO / ADC_IN3 / USART2_RX |
| Pin 14 | PA4 β GPIO / ADC_IN4 / SPI1_NSS |
| Pin 15 | PA5 β GPIO / ADC_IN5 / SPI1_SCK |
| Pin 16 | PA6 β GPIO / ADC_IN6 / SPI1_MISO |
| Pin 17 | PA7 β GPIO / ADC_IN7 / SPI1_MOSI |
| Pin 18 | PB0 β GPIO / ADC_IN8 |
| Pin 19 | PB1 β GPIO / ADC_IN9 |
| Pin 20 | PB2 β GPIO / BOOT1 |
| Pin 21 | PB10 β GPIO / I2C2_SCL / USART3_TX |
| Pin 22 | PB11 β GPIO / I2C2_SDA / USART3_RX |
| Pin 23 | PB12 β GPIO / SPI2_NSS / I2S2_WS |
| Pin 24 | PB13 β GPIO / SPI2_SCK / I2S2_CK |
| Pin 25 | PB14 β GPIO / SPI2_MISO / I2S2_MCK |
| Pin 26 | PB15 β GPIO / SPI2_MOSI / I2S2_SD |
| Pin 27 | PA8 β GPIO / MCO / TIM1_CH1 |
| Pin 28 | PA9 β GPIO / USART1_TX / TIM1_CH2 |
| Pin 29 | PA10 β GPIO / USART1_RX / TIM1_CH3 |
| Pin 30 | PA11 β GPIO / USB_DM / CAN_RX |
| Pin 31 | PA12 β GPIO / USB_DP / CAN_TX |
| Pin 32 | PA13 β GPIO / SWDIO |
| Pin 33 | PA14 β GPIO / SWCLK |
| Pin 34 | PA15 β GPIO / JTDI |
| Pin 35 | PB3 β GPIO / JTDO |
| Pin 36 | PB4 β GPIO / NJTRST |
| Pin 37 | PB5 β GPIO / I2C1_SMBA |
| Pin 38 | PB6 β GPIO / I2C1_SCL / TIM4_CH1 |
| Pin 39 | PB7 β GPIO / I2C1_SDA / TIM4_CH2 |
| Pin 40 | BOOT0 β Boot mode selection |
| Pin 41 | PB8 β GPIO / CAN_RX / TIM4_CH3 |
| Pin 42 | PB9 β GPIO / CAN_TX / TIM4_CH4 |
| Pin 43 | VSS_1 β Ground |
| Pin 44 | VDD_1 β Power supply |
| Pin 45 | VSS_2 β Ground |
| Pin 46 | VDD_2 β Power supply |
| Pin 47 | VSS_3 β Ground |
| Pin 48 | VDD_3 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
STM32F103C8T6 is suitable for 6 applications: Industrial Control Systems, Consumer Electronics, IoT Nodes, Automotive Body Electronics, Medical Devices, Test and Measurement Equipment.
Industrial Control Systems
The STM32F103C8T6 is widely used in industrial control systems such as PLCs, motor drives, and process controllers. Its 72 MHz Cortex-M3 core provides sufficient processing power for real-time control algorithms, while the advanced timer generates precise PWM signals for motor control. The CAN interface enables robust communication in industrial networks, and the 12-bit ADC allows accurate sensor feedback. The wide operating voltage range (2.0V-3.6V) and industrial temperature range (-40C to +85C) ensure reliable operation in harsh environments. In a typical PLC application, the MCU reads inputs from sensors, executes control logic, and drives actuators via PWM or digital outputs. The DMA controller offloads data transfer tasks, improving overall system efficiency. The STM32F103C8T6's rich peripheral set reduces the need for external components, lowering BOM cost and board space. Its low power modes enable energy-efficient operation in remote or battery-powered industrial sensors. The device's robustness and long-term availability make it a trusted choice for industrial designs.
Recommended
Consumer Electronics
The STM32F103C8T6 is a popular choice for consumer electronics such as smart home devices, wearables, and remote controls. Its low cost, small LQFP-48 package, and rich peripheral set make it ideal for cost-sensitive applications. The USB interface enables direct connectivity to PCs or chargers, while the I2C and SPI interfaces allow communication with sensors, displays, and memory. The 64KB Flash is sufficient for many consumer applications, and the 20KB SRAM supports moderate data buffering. In a smart home hub, the MCU can manage Wi-Fi modules (via UART), read temperature/humidity sensors (via I2C), and control relays (via GPIO). The low power modes extend battery life in portable devices. The device's popularity ensures a large ecosystem of libraries and examples, accelerating development. Its 72 MHz performance handles user interface tasks, such as button debouncing and LED control, without noticeable latency. The STM32F103C8T6's balance of performance, cost, and features makes it a go-to MCU for many consumer products.
Recommended
IoT Nodes
The STM32F103C8T6 is an excellent choice for IoT nodes that require local processing, sensor interfacing, and communication. Its low power consumption in standby mode (2.3 uA) is critical for battery-powered devices that need to operate for years. The MCU can wake up from standby via external interrupts or RTC alarms, enabling duty-cycled operation. The 12-bit ADC and multiple communication interfaces (I2C, SPI, UART) allow connection to a wide range of sensors, including temperature, humidity, pressure, and motion sensors. The 64KB Flash can store firmware and calibration data, while the 20KB SRAM handles data buffering. In a typical IoT node, the MCU reads sensor data periodically, processes it locally, and transmits it via a LoRa, Wi-Fi, or BLE module. The CAN interface is useful for industrial IoT applications. The STM32F103C8T6's robust design and wide temperature range make it suitable for outdoor deployments. Its extensive documentation and community support simplify development, reducing time-to-market.
Recommended
Automotive Body Electronics
The STM32F103C8T6 is used in automotive body electronics such as window lifters, seat control, and lighting systems. Its CAN interface is essential for communication with the vehicle's body control module. The advanced timer generates PWM signals for motor control, and the 12-bit ADC reads potentiometer positions or current sensors. The device operates over the automotive temperature range (-40C to +85C for the T6 variant, -40C to +105C for the T7 variant). The 72 MHz core provides sufficient performance for real-time control loops. In a window lifter application, the MCU controls a DC motor via a relay or H-bridge, monitors current to detect obstructions, and communicates status via CAN. The low power modes help reduce quiescent current when the vehicle is off. The STM32F103C8T6's robustness and long-term availability make it a reliable choice for automotive designs. Its AEC-Q100 qualification (for some variants) ensures compliance with automotive quality standards.
Recommended
Medical Devices
The STM32F103C8T6 is used in medical devices such as patient monitors, infusion pumps, and diagnostic equipment. Its high performance and rich peripherals enable precise control and data acquisition. The 12-bit ADC provides accurate readings from sensors, and the UART/USB interfaces allow data transfer to a host system. The device's low power consumption is beneficial for portable medical devices. In a patient monitor, the MCU reads vital signs (heart rate, SpO2) from sensors, processes the data, and displays it on an LCD. The CAN interface can be used for networking in hospital environments. The STM32F103C8T6's reliability and long-term availability are critical for medical applications. Its operating temperature range and voltage range are suitable for medical environments. The device's extensive documentation and safety features (such as watchdog timers) support compliance with medical standards. The 64KB Flash is sufficient for many medical applications, and the 20KB SRAM handles real-time data buffering.
Recommended
Test and Measurement Equipment
The STM32F103C8T6 is used in test and measurement equipment such as multimeters, oscilloscopes, and data loggers. Its high-speed ADC and DMA controller enable efficient data acquisition. The USB interface allows connection to a PC for data analysis and control. The device's multiple timers can generate precise timing signals for triggering measurements. In a data logger, the MCU samples analog signals at a configurable rate, stores data in SRAM or external memory, and transfers it via USB or UART. The 72 MHz core processes data in real time, enabling features like peak detection and waveform averaging. The STM32F103C8T6's low power consumption is beneficial for battery-powered portable instruments. Its wide operating voltage range and industrial temperature range ensure reliable operation in various environments. The device's rich peripheral set reduces the need for external components, simplifying design and reducing cost. The STM32F103C8T6 is a cost-effective solution for many test and measurement applications.
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Recommended Products Summary
Engineering reference data for STM32F103C8T6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F103CBT6 | STM32F103R8T6 | STM32F103C8T7 |
|---|---|---|---|---|
| Package | LQFP-48 | LQFP-48 - same | LQFP-48 - same | LQFP-48 - same |
| Flash Memory | 64 KB | 128 KB | 64 KB | 64 KB |
| SRAM | 20 KB | 20 KB | 20 KB | 20 KB |
| GPIO Pins | 37 | 37 | 51 | 37 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +105C |
| CAN Interface | Yes | Yes | Yes | Yes |
| USB Interface | Yes (FS) | Yes (FS) | Yes (FS) | Yes (FS) |
| Price (1pc) | $3.50 | $3.80 | $3.60 | $3.70 |
Key Differentiators
- Higher Flash memory option (vs STM32F103C8T6)
- More GPIOs (vs STM32F103C8T6)
- Extended temperature range (vs STM32F103C8T6)
Design Notes
Decouple each VDD pin with a 100nF ceramic capacitor placed as close to the pin as possible. Additionally, place a 4.7uF bulk capacitor on the main VDD rail. The VDDA pin must be connected to a clean analog supply, typically through a ferrite bead and a 1uF capacitor, to achieve the specified ADC accuracy. Ensure VSSA is connected to a quiet ground plane.
For the LQFP-48 package, ensure adequate copper pour for thermal dissipation. The exposed pad (if present) should be soldered to a ground plane to improve thermal performance. Keep high-speed signals (USB, SPI) away from analog inputs to minimize noise coupling. Use a 4-layer PCB with dedicated power and ground planes for best EMC performance.
The BOOT0 pin must be pulled low (through a 10k resistor) for normal operation from Flash. If BOOT0 is high, the device boots from System Memory (bootloader) or SRAM, which can cause unexpected behavior. Also, ensure the NRST pin is pulled high with a 100nF capacitor to ground for reliable reset. Do not leave unused GPIO pins floating; configure them as outputs or enable internal pull-ups/pull-downs to reduce power consumption.
Compliance Information
RoHS compliant per ST product page. AEC-Q100 qualification varies by variant; the T7 variant is AEC-Q100 qualified for automotive.
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