STMicroelectronics
STM32F103C8T6 - 32-bit ARM Cortex-M3 MCU, 64KB Flash | STMicroelectronics
MPN: STM32F103C8T6 ✓ Active
In Stock
Ships in 1-3 business days
2.0 V to 3.6 V Vdss
LQFP-48 Package
72 MHz Speed
64 KB Memory
From $1.02
USD / Unit
MOQ: 1 |
Price updated: 2026-08-17
Volume Pricing
| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.93 | $1.93 |
| 10 | $1.33 | $13.30 |
| 100 | $1.18 | $118.00 |
| 500 | $1.11 | $555.00 |
| 1,000 | $1.08 | $1,080.00 |
| 1,500 | $1.02 | $1,530.00 |
ℹ️ All prices are in USD
STM32F103C8T6 Overview
The STM32F103C8T6 is a 32-bit ARM Cortex-M3 microcontroller from STMicroelectronics, featuring 64KB Flash, 20KB SRAM, and operating at up to 72 MHz. It includes multiple communication interfaces (USART, SPI, I2C, USB, CAN) and 12-bit ADCs, making it suitable for industrial control, motor drives, and IoT applications. Available in LQFP-48 package.
Drop-in alternatives for STM32F103C8T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32F103C8T6 (same form factor and footprint) — differing in Package, Core, Flash Memory, Operating Temperature, SRAM.
Silicon Labs
Package: 64-TQFP (10x10 mm)
Core: ARM Cortex-M3 (32-bit)
Operating Temperature: -40 C to +85 C
Compare with STM32F103C8T6 →
STMicroelectronics
Package: 48-LQFP
Flash Memory: 32 KB (32K x 8)
SRAM: 10 KB
Compare with STM32F103C8T6 →
STMicroelectronics
Package: LQFP-48 (7x7 mm)
Core: ARM Cortex-M3 32-bit RISC
Flash Memory: 128 KB
Compare with STM32F103C8T6 →
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32F103CBT6
STMicroelectronics
ARM Cortex-M3 32-bit RISC · 72 MHz · 128 KB · 20 KB · 2.0 V to 3.6 V · 37 (5 V tolerant) · 2x 12-bit, up to 10 channels · 1x 12-bit
✓ In Stock
$3.2 / Unit
View Datasheet →GD32F103C8T6
GigaDevice, compatible
📋 Reference alternative (not in catalog)
STM32F103R8T6
STMicroelectronics
ARM Cortex-M3 32-bit · 72 MHz · 64 KB (64K x 8) · 20 KB · 2.0 V to 3.6 V · 51 I/O · 2 x 12-bit, 1 us conversion time, 16 channels · 3 x general-purpose 16-bit + 1 advanced PWM timer
✓ In Stock
$2.9 / Unit
View Datasheet →APM32F103C8T6
Geehy, compatible
📋 Reference alternative (not in catalog)
STM32F030C8T6
STMicroelectronics
ARM Cortex-M0 32-bit · 48 MHz · 64 KB · 8 KB · 2.4 V to 3.6 V · 12-bit · up to 16 external channels · 5 timers including 1 advanced-control timer
✓ In Stock
$0.98 / Unit
View Datasheet →STM32F103C8T6 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M3 |
| Max Clock Frequency | 72 MHz |
| Flash Memory | 64 KB |
| SRAM | 20 KB |
| Supply Voltage | 2.0 V to 3.6 V |
| Operating Temperature | -40C to +85C |
| Package | LQFP-48 |
| Mounting Type | Surface Mount |
| Number of I/Os | 37 |
| ADC Resolution | 12-bit |
| Number of ADC Channels | 10 |
| Timer Modules | 3 general-purpose, 1 advanced |
| Communication Interfaces | USART (2), SPI (2), I2C (2), USB 2.0 FS, CAN 2.0B |
| DMA Channels | 7 |
| Debug Interface | SWD, JTAG |
| RoHS Status | Compliant |
STM32F103C8T6 Pin Configuration
| Pin 1 | VBAT — Battery backup for RTC |
| Pin 2 | PC13 — GPIO, also used for RTC tamper |
| Pin 3 | PC14 — GPIO, also used for OSC32_IN |
| Pin 4 | PC15 — GPIO, also used for OSC32_OUT |
| Pin 5 | OSC_IN — Main oscillator input |
| Pin 6 | OSC_OUT — Main oscillator output |
| Pin 7 | NRST — Reset (active low) |
| Pin 8 | VSSA — Analog ground |
| Pin 9 | VDDA — Analog power supply |
| Pin 10 | PA0 — GPIO, ADC12_IN0, TIM2_CH1 |
| Pin 11 | PA1 — GPIO, ADC12_IN1, TIM2_CH2 |
| Pin 12 | PA2 — GPIO, ADC12_IN2, TIM2_CH3 |
| Pin 13 | PA3 — GPIO, ADC12_IN3, TIM2_CH4 |
| Pin 14 | PA4 — GPIO, SPI1_NSS, DAC_OUT1 |
| Pin 15 | PA5 — GPIO, SPI1_SCK, DAC_OUT2 |
| Pin 16 | PA6 — GPIO, SPI1_MISO, TIM3_CH1 |
| Pin 17 | PA7 — GPIO, SPI1_MOSI, TIM3_CH2 |
| Pin 18 | PB0 — GPIO, TIM3_CH3, ADC12_IN8 |
| Pin 19 | PB1 — GPIO, TIM3_CH4, ADC12_IN9 |
| Pin 20 | PB2 — GPIO, BOOT1 |
| Pin 21 | PB10 — GPIO, I2C2_SCL, USART3_TX |
| Pin 22 | PB11 — GPIO, I2C2_SDA, USART3_RX |
| Pin 23 | PB12 — GPIO, SPI2_NSS, I2C2_SMBA |
| Pin 24 | PB13 — GPIO, SPI2_SCK, USART3_CTS |
| Pin 25 | PB14 — GPIO, SPI2_MISO, USART3_RTS |
| Pin 26 | PB15 — GPIO, SPI2_MOSI, TIM1_CH3N |
| Pin 27 | PC13 — GPIO, RTC_AF1 |
| Pin 28 | PC14 — GPIO, OSC32_IN |
| Pin 29 | PC15 — GPIO, OSC32_OUT |
| Pin 30 | VSS_1 — Ground |
| Pin 31 | VDD_1 — Power supply |
| Pin 32 | VDDA — Analog power supply |
| Pin 33 | VSSA — Analog ground |
| Pin 34 | PA8 — GPIO, TIM1_CH1, MCO |
| Pin 35 | PA9 — GPIO, TIM1_CH2, USART1_TX |
| Pin 36 | PA10 — GPIO, TIM1_CH3, USART1_RX |
| Pin 37 | PA11 — GPIO, USART1_CTS, USB_DM |
| Pin 38 | PA12 — GPIO, USART1_RTS, USB_DP |
| Pin 39 | PA13 — GPIO, SWDIO |
| Pin 40 | PA14 — GPIO, SWCLK |
| Pin 41 | PA15 — GPIO, JTDI |
| Pin 42 | PB3 — GPIO, JTDO |
| Pin 43 | PB4 — GPIO, NJTRST |
| Pin 44 | PB5 — GPIO, I2C1_SMBA |
| Pin 45 | PB6 — GPIO, I2C1_SCL, TIM4_CH1 |
| Pin 46 | PB7 — GPIO, I2C1_SDA, TIM4_CH2 |
| Pin 47 | BOOT0 — Boot mode selection |
| Pin 48 | VDD_2 — Power supply |
Typical Applications
STM32F103C8T6 is suitable for 6 applications: Industrial Control, IoT Gateway, Medical Monitoring Device, Automotive Body Control, Consumer Electronics, Data Logging System.
Industrial Control
Used in PLCs, motor drives, and automation controllers.
IoT Gateway
Acts as a central hub for sensor data collection and communication.
Medical Monitoring Device
Powers portable health monitors with low-power operation.
Automotive Body Control
Manages lighting, wipers, and window controls.
Consumer Electronics
Embedded in smart home devices, drones, and toys.
Data Logging System
Records sensor data to SD card or transmits via USB.
What is the maximum clock speed of STM32F103C8T6?
The maximum clock speed is 72 MHz using an external crystal or internal PLL.
How much Flash and SRAM does STM32F103C8T6 have?
It has 64 KB of Flash memory and 20 KB of SRAM.
What is the supply voltage range for STM32F103C8T6?
The supply voltage range is 2.0V to 3.6V.
Does STM32F103C8T6 have a built-in USB interface?
Yes, it has a USB 2.0 Full-Speed interface.
What is the package type of STM32F103C8T6?
It comes in an LQFP-48 package with a 7x7 mm body.
Can STM32F103C8T6 be programmed using Arduino IDE?
Yes, with the STM32duino core or STM32CubeProgrammer, it can be programmed via Arduino IDE.
What is the difference between STM32F103C8T6 and STM32F103CBT6?
The STM32F103CBT6 has 128 KB Flash, while the C8T6 has 64 KB Flash. Both have the same pinout.
Does STM32F103C8T6 support CAN bus?
Yes, it has one CAN 2.0B interface.
What is the maximum ADC sampling rate of STM32F103C8T6?
The 12-bit ADC can achieve up to 1 MHz sampling rate.
Is STM32F103C8T6 suitable for motor control applications?
Yes, it has an advanced timer for PWM generation and is commonly used in motor drives.
What development tools are compatible with STM32F103C8T6?
It is supported by STM32CubeIDE, Keil MDK, IAR EWARM, and GCC-based toolchains.
Does STM32F103C8T6 have a built-in bootloader?
Yes, it has a system memory bootloader that supports USART and USB DFU.
What is the power consumption of STM32F103C8T6 in run mode?
Typical run mode current is about 50 mA at 72 MHz.
Can STM32F103C8T6 operate at 3.3V logic levels?
Yes, all I/O pins are 3.3V tolerant, and some are 5V tolerant.
What is the operating temperature range of STM32F103C8T6?
The industrial temperature range is -40C to +85C.
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