STM32F103C8T7 - 72MHz Cortex-M3 MCU 64KB LQFP-48 | STMicroelectronics
N.º da peça: STM32F103C8T7 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.2 | $4,20 |
| 10 | $3.78 | $37,80 |
| 100 | $3.15 | $315,00 |
| 500 | $2.65 | $1.325,00 |
| 1.000 | $2.25 | $2.250,00 |
STM32F103C8T7 Visão geral
An ARM Cortex-M3 microcontroller is a 32-bit RISC processor core designed for deterministic real-time embedded control, sitting within a broader taxonomy of MCU -> embedded processor -> microcontroller -> semiconductor. Cortex-M3 cores specifically target low-latency interrupt response (typically 12 clock cycles), Thumb-2 instruction efficiency, and hardware divide in a small footprint, making them the workhorse of industrial motor control, USB peripherals, and consumer device controllers where deterministic behavior matters more than raw clock speed.
Key features include 72 MHz CPU with hardware single-cycle multiply, 64 KB Flash with read-while-write support, 20 KB SRAM, a 12-bit ADC with up to 10 channels, two I2C, two SPI, three USART, one USB Full-Speed, and one CAN 2.0B interface. Operating voltage spans 2.0V to 3.6V with internal 8 MHz and 40 kHz RC oscillators plus a PLL multiplying up to 72 MHz.
The architecture pairs the Cortex-M3 core with a Nested Vectored Interrupt Controller (NVIC) supporting up to 43 maskable interrupts, a DMA controller with seven channels, and a power management block offering Sleep, Stop, and Standby modes. The bus matrix arbitrates between the core, DMA, and peripherals to keep deterministic throughput even when USB or CAN packets arrive.
Typical applications include USB HID peripherals, industrial CAN-bus nodes, motor-control boards, low-cost development platforms (the 'Blue Pill' form factor), and consumer device controllers. The integrated USB PHY and CAN 2.0B controller make it particularly suited for bridging PC and industrial networks without external transceiver logic. Operating temperature spans -40C to +105C for the industrial grade.
When designing with this device, watch the 2.0V minimum VDD during PLL start-up and ensure decoupling comprises a 100 nF X7R per VDD pin plus a bulk 4.7 uF tantalum or ceramic. The NRST pin requires an external 10 kohm pull-up and a 100 nF capacitor to VDD for reliable reset.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
Alternativas drop-in para STM32F103C8T7 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com STM32F103C8T7 (mesmo formato e footprint) — diferindo em Flash Memory, Operating Temperature, Package, Core, ADC.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32F103C8T6
✅ Drop-In✓ Em estoque
$1.02 / unidade
Ver ficha técnica →STM32F103CBT6
✅ Drop-In✓ Em estoque
$3.2 / unidade
Ver ficha técnica →STM32F103C8T6TR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
GD32F103C8T6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
APM32F103C8T6
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
STM32F103C8T7 Classificações máximas e características elétricas
| Core | ARM Cortex-M3 32-bit RISC |
| Maximum CPU Frequency | 72 MHz |
| DMIPS Performance | 90 DMIPS at 1.25 DMIPS/MHz |
| Flash Memory | 64 KB (64K x 8) |
| SRAM | 20 KB |
| Operating Voltage | 2.0 V to 3.6 V |
| Encapsulamento | 48-LQFP (7x7 mm) |
| Tipo de montagem | Surface Mount |
| USB | USB 2.0 Full-Speed (on-chip PHY) |
| CAN | CAN 2.0B (bxCAN) |
| ADC | 2 x 12-bit, 1 MSPS, up to 10 channels |
| Timers | 7 x 16-bit (incl. PWM) |
| Communication Interfaces | 9 total (2x I2C, 2x SPI, 3x USART, USB, CAN) |
| Temperatura de operação | -40C to +105C |
| Nível MSL | 3 (168 hours) |
| Status RoHS | Compliant |
Configuração de pinos do STM32F103C8T7
| Pino 1 | VBAT — Backup battery supply input |
| Pino 2 | PC13 — GPIO/Tamper-RTC (general purpose) |
| Pino 3 | PC14 — GPIO/OSC32_IN (32.768 kHz crystal) |
| Pino 4 | PC15 — GPIO/OSC32_OUT (32.768 kHz crystal) |
| Pino 5 | OSC_IN — External oscillator / PD0 input |
| Pino 6 | OSC_OUT — External oscillator / PD1 output |
| Pino 7 | NRST — Reset input, active low (internal pull-up) |
| Pino 8 | VSSA — Analog ground |
| Pino 9 | VDDA — Analog supply (2.0V to 3.6V) |
| Pino 10 | PA0 — GPIO/ADC12_IN0/WKUP/TIM2_CH1_ETR |
| Pino 11 | PA1 — GPIO/ADC12_IN1/TIM2_CH2 |
| Pino 12 | PA2 — GPIO/USART2_TX/ADC12_IN2/TIM2_CH3 |
| Pino 13 | PA3 — GPIO/USART2_RX/ADC12_IN3/TIM2_CH4 |
| Pino 14 | PA4 — GPIO/SPI1_NSS/USART2_CK/ADC12_IN4 |
| Pino 15 | PA5 — GPIO/SPI1_SCK/ADC12_IN5 |
| Pino 16 | PA6 — GPIO/SPI1_MISO/ADC12_IN6/TIM3_CH1 |
| Pino 17 | PA7 — GPIO/SPI1_MOSI/ADC12_IN7/TIM3_CH2 |
| Pino 18 | PB0 — GPIO/ADC12_IN8/TIM3_CH3 |
| Pino 19 | PB1 — GPIO/ADC12_IN9/TIM3_CH4 |
| Pino 20 | PB2/BOOT1 — GPIO/BOOT1 strap (input) |
| Pino 21 | PB10 — GPIO/I2C2_SCL/USART3_TX |
| Pino 22 | PB11 — GPIO/I2C2_SDA/USART3_RX |
| Pino 23 | VSS_1 — Ground (digital) |
| Pino 24 | VDD_1 — Digital supply (2.0V to 3.6V) |
| Pino 25 | PB12 — GPIO/SPI2_NSS |
| Pino 26 | PB13 — GPIO/SPI2_SCK |
| Pino 27 | PB14 — GPIO/SPI2_MISO/TIM1_CH1 |
| Pino 28 | PB15 — GPIO/SPI2_MOSI/TIM1_CH1N |
| Pino 29 | PA8 — GPIO/USART1_CK/TIM1_CH1 |
| Pino 30 | PA9 — GPIO/USART1_TX/TIM1_CH2 |
| Pino 31 | PA10 — GPIO/USART1_RX/TIM1_CH3 |
| Pino 32 | PA11 — GPIO/USB_D-/CAN1_RX |
| Pino 33 | PA12 — GPIO/USB_D+/CAN1_TX |
| Pino 34 | PA13 — GPIO/JTMS/SWDIO |
| Pino 35 | VSS_2 — Ground (digital) |
| Pino 36 | VDD_2 — Digital supply (2.0V to 3.6V) |
| Pino 37 | PA14 — GPIO/JTCK/SWCLK |
| Pino 38 | PA15 — GPIO/JTDI/TIM2_CH1_ETR |
| Pino 39 | PB3 — GPIO/JTDO/SPI1_SCK/TIM2_CH2 |
| Pino 40 | PB4 — GPIO/NJTRST/SPI1_MISO/TIM3_CH1 |
| Pino 41 | PB5 — GPIO/I2C1_SMBAI/SPI1_MOSI/TIM3_CH2 |
| Pino 42 | PB6 — GPIO/I2C1_SCL/TIM4_CH1 |
| Pino 43 | PB7 — GPIO/I2C1_SDA/TIM4_CH2 |
| Pino 44 | BOOT0 — Boot mode strap (internal pull-down) |
| Pino 45 | PB8 — GPIO/TIM4_CH3 |
| Pino 46 | PB9 — GPIO/TIM4_CH4 |
| Pino 47 | VSS_3 — Ground (digital) |
| Pino 48 | VDD_3 — Digital supply (2.0V to 3.6V) |
Aplicações típicas
STM32F103C8T7 é adequado para 6 aplicaçãos: USB HID / CDC Peripheral Devices, Industrial CAN-Bus Nodes, Brushless DC Motor Control, Low-Cost Development / Maker Platforms, Consumer Device Controllers, Industrial Sensor Aggregators / IoT Gateways.
USB HID / CDC Peripheral Devices
The STM32F103C8T7's integrated USB 2.0 Full-Speed PHY, with seven bidirectional endpoints and 1024-byte dedicated SRAM buffer, makes it ideal for USB HID keyboards, mice, gamepads, and CDC virtual COM port bridges. The USB peripheral operates without an external transceiver, requiring only a 22-ohm series resistor on D+/D- and a 1.5 kohm pull-up on D+ for full-speed enumeration. Combined with the 72 MHz Cortex-M3 running at 90 DMIPS, designers can implement HID polling at 1 kHz with software overhead headroom for LED matrices or sensor fusion. ST's USB Device Library covers HID, CDC, MSC, and DFU classes without external licensing. Power draw on the USB rail with all peripherals idle is roughly 30 mA, well within USB 2.0 budget.
Recomendado
Industrial CAN-Bus Nodes
The STM32F103C8T7's bxCAN (Basic Extended CAN 2.0B) controller with hardware message RAM, identifier filtering, and bit timing up to 1 Mbit/s is purpose-built for industrial CAN-bus nodes such as sensor aggregators, motor drives, and PLC I/O modules. The bxCAN peripheral handles both 11-bit and 29-bit identifiers and dual receive FIFOs, offloading bus arbitration from the core. Pairing the MCU with an external TJA1050 or SN65HVD230 transceiver provides the physical bus interface. Operating from 2.0V to 3.6V with industrial -40C to +105C grading, the part is rated for factory-floor installations. Together with the seven 16-bit timers for PWM motor control, engineers can build full sensor-and-actuator nodes in one chip.
Recomendado
Brushless DC Motor Control
The STM32F103C8T7's seven 16-bit timers including advanced-control PWM timers (TIM1) with complementary outputs and dead-time insertion make it a strong fit for brushless DC, PMSM, and stepper motor drives at modest power. Each advanced timer offers 6 PWM channels with hardware break inputs and encoder-mode support, sufficient to drive six-step or sinusoidal commutation up to tens of kHz switching frequency. The 12-bit ADC at 1 MSPS is fast enough for back-EMF sensing and current shunt feedback within a single PWM cycle. ST's STM32 Motor Control SDK targets this exact MCU for sensorless FOC of small BLDC pumps, fans, and e-bike hubs. The LQFP-48 footprint keeps board size small for compact drive enclosures.
Recomendado
Low-Cost Development / Maker Platforms
The STM32F103C8T7 is the canonical MCU on the popular 'Blue Pill' STM32 development board, prized for its sub-$2 price, exposed SWD pins, and 64 KB Flash sufficient for Arduino-style sketches via STM32duino core. Hobbyists use it for robotics controllers, LED matrices, IoT edge nodes with USB programming, and DIY oscilloscope/logic-analyzer projects. The part exposes all major peripherals on breakout pins (PA0-PA15, PB0-PB15), and the on-chip USB PHY eliminates an external FTDI chip needed on older boards. With -40C to +105C rating, the board is also a learning vehicle for industrial-temperature design. Many firmware ports of Arduino libraries target this chip explicitly.
Recomendado
Consumer Device Controllers
The STM32F103C8T7's 72 MHz Cortex-M3 plus 20 KB SRAM can comfortably run USB stacks, BLE-via-UART bridge code, simple UI loops, and motor control on a single die, making it a fit for consumer appliances like robotic vacuums, smart kitchen devices, and remote controls. The integrated USB and CAN interfaces let the same firmware drive PC connectivity and an internal CAN sensor bus without external peripherals. The 2.0V-3.6V range supports single-cell Li-ion (via boost) or 3.3V regulated rails common in consumer designs. Combined with the 105C temperature grade, it can be placed near heat-generating power stages in enclosed appliances. Sleep and Stop modes drop quiescent current below 20 uA for battery-powered accessories.
Recomendado
Industrial Sensor Aggregators / IoT Gateways
The STM32F103C8T7's nine communication interfaces (3x USART, 2x I2C, 2x SPI, USB, CAN) make it ideal as a sensor aggregator or simple IoT gateway combining industrial fieldbus (CAN, RS-485 via USART) with USB or SPI links to wireless modules. The two 12-bit ADCs at 1 MSPS are adequate for analog sensor digitization, and the DMA controller with seven channels can stream data without CPU load. The part is widely deployed in industrial nodes monitoring temperature, pressure, and flow via I2C sensor chains and forwarding to a host via CAN. The -40C to +105C rating and 64 KB Flash comfortably support protocol translation stacks.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32F103C8T7 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32F103C8T6 | STM32F103CBT6 | STM32F103C8T6TR | GD32F103C8T6 | APM32F103C8T6 |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | GigaDevice |
| CPU Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Maximum Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz | 108 MHz | 72 MHz |
| Flash Memory | 64 KB | 64 KB | 128 KB | 64 KB | 64 KB | 64 KB |
| Operating Temperature | -40C to +105C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| USB | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed | USB 2.0 Full-Speed |
| CAN | CAN 2.0B | CAN 2.0B | CAN 2.0B | CAN 2.0B | CAN 2.0B | CAN 2.0B |
Principais diferenciais
- Industrial-grade temperature option (vs STM32F103C8T6)
- Doubled Flash for same-footprint upgrade (vs STM32F103CBT6)
- Higher clock rate in same package (vs GD32F103C8T6)
Notas de projeto
Decoupling: place a 100 nF X7R 0603 capacitor on each VDD pin (3 pins total), plus one shared 4.7 uF X5R ceramic at the regulator output. Place the small caps within 3 mm of their respective VDD pins via short wide traces. Add 1 uF + 10 nF on VDDA near the supply pin; do not share VDDA ground returns with digital VSS - star-ground to the regulator ground. Without proper decoupling the ADC readings will show 10-20 LSB noise and the USB packet-retry rate will spike.
BOOT0 strap: BOOT0 must be pulled LOW for normal boot from Flash; leaving it floating or pulling it HIGH drops the part into bootloader or RAM-boot mode. R-C filter (10 kohm + 100 nF) is recommended on NRST to avoid spurious resets during hot-plug of USB or noisy supplies. Also, USB DP pull-up (1.5 kohm to D+) must be driven by software-controlled GPIO (typically PA12), not wired permanently, to comply with USB suspend current limits under 2.5 mA.
Estimated power dissipation: at 72 MHz, 3.3V, all peripherals active, the STM32F103C8T7 draws roughly 50 mA (165 mW). The LQFP-48 has theta_JA around 65 C/W on a 2-layer JEDEC EIA/JESD51-3 test board, giving a junction-rise of about 11C at ambient 25C - well within the 105C maximum. Forcing the part to industrial temperatures near 105C ambient should still be fine; the bottleneck is peripheral I/O leakage, not the CPU die.
Crystal layout: keep the 8 MHz HSE crystal traces under 5 mm and place the load capacitors (typically 20-33 pF) on the same PCB side as the MCU, with a ground guard ring. Avoid routing any digital signal traces under the crystal traces or across the oscillator pins. For USB, route the D+/D- pair as a matched 90-ohm differential, length-matched within 150 mils, and place the 22-ohm series resistors at the MCU end - not at the connector end - to dampen reflections.
Informações de conformidade
RoHS compliant per STMicroelectronics product page. Lead-free reflow compatible per IPC/JEDEC J-STD-020. Not AEC-Q100 qualified - this is a general-purpose MCU, not automotive grade.
