STMicroelectronics

STM32F103C8T6 - MCU Cortex-M3 de 72MHz, 64KB de Flash, LQFP-48 | STMicroelectronics

N.º da peça: STM32F103C8T6 ✓ Ativo
Em estoque Enviado em 1 a 3 dias úteis
2.0 V to 3.6 V Vdss LQFP-48 (7x7 mm, 0.5 mm pitch) Package 72 MHz Speed 64 KB Memory
A partir de $1.68 USD / unidade
MOQ: 1 |
Preço atualizado: 2026-10-14
Preços por volume
Qtd. Preço unitário Total
1 $3.1 $3,10
10 $2.78 $27,80
100 $2.45 $245,00
500 $2.18 $1.090,00
1.000 $1.92 $1.920,00
3.000 $1.68 $5.040,00
ℹ️ Todos os preços estão em USD

STM32F103C8T6 Visão geral

O STMicroelectronics STM32F103C8T6 é um microcontrolador de 32 bits ARM Cortex-M3 da linha de desempenho de densidade média, operando a até 72 MHz, com 64 KB de Flash e 20 KB de SRAM, em encapsulamento LQFP de 48 pinos (7x7 mm).

Um microcontrolador (MCU) ARM Cortex-M3 é um núcleo de processador RISC de 32 bits projetado pela Arm Holdings para aplicações embarcadas que exigem desempenho determinístico em tempo real com baixo consumo. O Cortex-M3 situa-se na extremidade inferior da família Cortex-M (acima do Cortex-M0/M0+ e abaixo do Cortex-M4/M7), e os microcontroladores desta categoria combinam o núcleo do processador com memória on-chip, periféricos e blocos analógicos num único system-on-chip. A família STM32F103 pertence especificamente à hierarquia mais ampla: ARM Cortex-M3 -> MCU de 32 bits -> série STM32F1 -> família mainstream STM32 -> microcontroladores STMicroelectronics -> semicondutores. Esta hierarquia é importante porque determina o toolchain (o Arm Cortex-M3 suporta os fluxos padrão Arm Keil, IAR, GCC e STM32CubeIDE) e o modelo de programação de periféricos usado em toda a plataforma STM32.

As principais características incluem 64 KB de Flash embutida com capacidade de leitura durante escrita, 20 KB de SRAM, faixa de alimentação de 2,0 V a 3,6 V, oscilador RC interno de 8 MHz com multiplicador PLL até 72 MHz, dois ADCs de 12 bits (conversão de 1 µs, até 16 canais), sete temporizadores de 16 bits e um controlador USB 2.0 Full-Speed device/host/OTG. Os periféricos de comunicação incluem três USARTs, dois SPIs (18 Mbit/s), dois barramentos I2C (400 kHz), uma interface CAN 2.0B e uma porta USB Full-Speed. O encapsulamento LQFP de 48 pinos expõe 37 pinos GPIO tolerantes a 5 V.

Arquiteturalmente, o núcleo Cortex-M3 oferece 1,25 Dhrystone MIPS por MHz, suporta o conjunto de instruções Thumb-2 e inclui um Nested Vectored Interrupt Controller (NVIC) com prioridade configurável e tratamento de pilha por hardware. O regulador de tensão integrado e o brown-out reset (BOR) simplificam o projeto de alimentação, enquanto o registrador de backup de 4 bytes com pino de detecção de tamper suporta modos RTC com bateria de backup.

As aplicações típicas incluem placas de controle industrial, acionamentos de motores (complementos BLDC/PMSM FOC), dispositivos USB HID/COM, interfaces de nó CAN-bus e plataformas de desenvolvimento de baixo custo, como a conhecida placa "Blue Pill".

Ao projetar com este dispositivo, coloque um capacitor cerâmico de desacoplamento de 100 nF o mais próximo possível de cada par de pinos VDD/VDDA e reserve a conexão do pino NRST para um pull-up de 10 kΩ e um botão de reset opcional. Certifique-se de que o estado do pino BOOT0 corresponda à memória de boot desejada em cada energização.

Esta página sintetiza preços de distribuidores, alternativas drop-in (primeiro variantes STM32F103 da mesma marca, depois peças compatíveis em pinagem de outras marcas) e notas práticas de projeto não encontradas no datasheet do fabricante.

Alternativas drop-in para STM32F103C8T6 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.

Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:

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

✓ Em estoque

$3.2 / unidade

Ver ficha técnica →

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

✓ Em estoque

$0.98 / unidade

Ver ficha técnica →

STM32F103C8T7

Same die, AEC-Q100 automotive grade, 105C vs 85C max Tj, pin-to-pin compatible

📋 Alternativa de referência (fora do catálogo)

GD32F103C8T6

Same LQFP-48 pinout, Cortex-M3 core but 108MHz vs 72MHz (+50%), register map largely compatible

📋 Alternativa de referência (fora do catálogo)

APM32F103C8T6

Same LQFP-48 footprint, Cortex-M3 at 96MHz, register-compatible with HAL layer

📋 Alternativa de referência (fora do catálogo)

STM32F103C8T6 Classificações máximas e características elétricas

Core Architecture ARM Cortex-M3 (32-bit RISC)
Frequência máxima de clock 72 MHz
Flash Memory 64 KB
SRAM 20 KB
Supply Voltage (VDD) 2.0 V to 3.6 V
Encapsulamento LQFP-48 (7x7 mm, 0.5 mm pitch)
GPIO Count 37
ADC 2x 12-bit, 1 µs, up to 16 channels
Timers 7x 16-bit (including 1x watchdog, 2x SysTick)
USART 3
SPI 2 (18 Mbit/s)
I2C 2 (400 kHz)
USB 1x USB 2.0 Full-Speed device/host/OTG
CAN 1x CAN 2.0B
Temperatura de operação -40 °C to +85 °C (industrial grade)
Status RoHS Compliant

Configuração de pinos do STM32F103C8T6

LQFP-48 Package Pinout Diagram LQFP-48 7x7mm, P0.5mm, JEDEC MS-026. 1 12 LQFP-48
Pino 1 VBAT — Backup battery supply input
Pino 2 PC13 — GPIO PC13, anti-tamper (RTC)
Pino 3 PC14 — GPIO PC14 / OSC32_IN
Pino 4 PC15 — GPIO PC15 / OSC32_OUT
Pino 5 OSC_IN — HSE oscillator input
Pino 6 OSC_OUT — HSE oscillator output
Pino 7 NRST — Reset input, active-low
Pino 8 VSSA — Analog ground
Pino 9 VDDA — Analog supply (2.4 V - 3.6 V)
Pino 10 PA0 — GPIO PA0 / WKUP / ADC_IN0 / TIM2_CH1
Pino 11 PA1 — GPIO PA1 / ADC_IN1 / TIM2_CH2
Pino 12 PA2 — GPIO PA2 / USART2_TX / ADC_IN2
Pino 13 PA3 — GPIO PA3 / USART2_RX / ADC_IN3
Pino 14 PA4 — GPIO PA4 / SPI1_NSS / ADC_IN4
Pino 15 PA5 — GPIO PA5 / SPI1_SCK / ADC_IN5
Pino 16 PA6 — GPIO PA6 / SPI1_MISO / ADC_IN6
Pino 17 PA7 — GPIO PA7 / SPI1_MOSI / ADC_IN7
Pino 18 PB0 — GPIO PB0 / ADC_IN8 / TIM3_CH3
Pino 19 PB1 — GPIO PB1 / ADC_IN9 / TIM3_CH4
Pino 20 PB2 — GPIO PB2 / BOOT1 (also PB-BOOT input)
Pino 21 PB10 — GPIO PB10 / I2C2_SCL / USART3_TX
Pino 22 PB11 — GPIO PB11 / I2C2_SDA / USART3_RX
Pino 23 VSS_1 — Digital ground
Pino 24 VDD_1 — Digital supply (2.0 V - 3.6 V)
Pino 25 PB12 — GPIO PB12 / SPI2_NSS / CAN2_RX
Pino 26 PB13 — GPIO PB13 / SPI2_SCK / CAN2_TX / USB_DP pull-up
Pino 27 PB14 — GPIO PB14 / SPI2_MISO
Pino 28 PB15 — GPIO PB15 / SPI2_MOSI
Pino 29 PA8 — GPIO PA8 / USART1_CK / TIM1_CH1
Pino 30 PA9 — GPIO PA9 / USART1_TX / TIM1_CH2
Pino 31 PA10 — GPIO PA10 / USART1_RX / TIM1_CH3
Pino 32 PA11 — GPIO PA11 / CAN1_RX / USBDM (USB data minus)
Pino 33 PA12 — GPIO PA12 / CAN1_TX / USBDP (USB data plus)
Pino 34 PA13 — GPIO PA13 / JTMS / SWDIO
Pino 35 VSS_2 — Digital ground
Pino 36 VDD_2 — Digital supply (2.0 V - 3.6 V)
Pino 37 PA14 — GPIO PA14 / JTCK / SWCLK
Pino 38 PA15 — GPIO PA15 / JTDI
Pino 39 PB3 — GPIO PB3 / JTDO / TRACESWO
Pino 40 PB4 — GPIO PB4 / JNTRST
Pino 41 PB5 — GPIO PB5 / I2C1_SMBAI
Pino 42 PB6 — GPIO PB6 / I2C1_SCL / TIM4_CH1
Pino 43 PB7 — GPIO PB7 / I2C1_SDA / TIM4_CH2
Pino 44 BOOT0 — Boot mode select (0 = Flash, 1 = System bootloader)
Pino 45 PB8 — GPIO PB8 / TIM4_CH3
Pino 46 PB9 — GPIO PB9 / TIM4_CH4
Pino 47 VSS_3 — Digital ground
Pino 48 VDD_3 — Digital supply (2.0 V - 3.6 V)

Aplicações típicas

STM32F103C8T6 é adequado para 6 aplicaçãos: Industrial Control Boards, USB HID / Virtual COM Port Devices, BLDC / PMSM Motor Drives, CAN-Bus Node Interface, Low-Cost Development Platforms ("Blue Pill"), IoT Sensor / Smart Home Edge Nodes.

🏭

Industrial Control Boards

The STM32F103C8T6 fits industrial control boards because its 72 MHz Cortex-M3 core and 64 KB Flash comfortably handle Modbus RTU slave firmware, PID loop control, and user-interface logic on a single chip. The dual 12-bit ADCs (1 µs, up to 16 channels) sample 4-20 mA sensor inputs at the kHz rates typical of PLC analog modules, while the three USARTs (USART1/2/3) support simultaneous RS-232/RS-485 fieldbus and a debug console. The 2.0 V to 3.6 V supply range aligns with 3.3 V industrial backplanes, and the -40 °C to +85 °C operating temperature meets most cabinet-mounted equipment specs. On-board CAN 2.0B lets a single MCU handle both a sensor bus and an external CANopen master.

🌐

USB HID / Virtual COM Port Devices

The STM32F103C8T6's integrated USB 2.0 Full-Speed device controller (12 Mbit/s) makes it a natural fit for USB HID-class peripherals, virtual COM-port bridges, and CDC-MSC composite devices without external PHY hardware. The 72 MHz core and 20 KB SRAM execute the standard ST USB device library (and STM32CubeMX-generated middleware) with room left for application logic, while the 64 KB Flash fits typical HID report descriptors and command parsers. Its 2.0 V to 3.6 V rail tolerance lets designers tap the USB 5 V bus through an LDO and run the MCU from a single 3.3 V supply. Designers should add ESD protection (USBLC6-2SC6) and a 1.5 kΩ pull-up on the D+ line to the USB connector.

✈️

BLDC / PMSM Motor Drives

The STM32F103C8T6 is widely used in sensorless or hall-sensored BLDC and PMSM motor drives for low- to mid-power applications (fans, pumps, e-bike hubs). Its 72 MHz Cortex-M3 plus advanced timers (TIM1 with complementary PWM and dead-time insertion) generate the 6-step or space-vector PWM that drives a 3-phase inverter at up to tens of kHz switching. The two ADCs trigger from timer events to sample phase currents within the PWM cycle for low-latency commutation, and the quadrature encoder interface on TIM2 supports sensored FOC firmware patterns. CAN bus readiness lets the drive communicate with a central PLC, while the 2.0-3.6 V range accepts a wide range of bus-powered motor-control supplies.

🚗

CAN-Bus Node Interface

The STM32F103C8T6 is a battle-tested choice for CAN 2.0B node interfaces used in automotive body-electronics, industrial CANopen, and medical device buses. The bxCAN peripheral supports standard and extended frames with hardware filter banks and a 1 Mbit/s bit rate suitable for most fieldbus deployments. With 64 KB Flash the device holds small CANopen/CANFestival stacks and application logic, while three USARTs allow a companion GPS or HMI link. Operating temperature of -40 °C to +85 °C suits non-automotive nodes; designers needing AEC-Q100 should select the STM32F103C8T7 variant. Drop a 60 Ω termination resistor only on the bus ends and add a TJA1050 or TCAN332 transceiver externally.

🧩

Low-Cost Development Platforms ("Blue Pill")

The STM32F103C8T6 is the headline MCU of the iconic "Blue Pill" development board that became the de-facto entry ticket to ARM Cortex-M3 firmware development. Its 72 MHz core, 64 KB Flash, SWD debug pins, USB connector, and 48-pin LQFP form factor fit on a 53 x 23 mm PCB with a USB micro-B port, a 3.3 V LDO, a reset button, and boot-mode jumpers. Students and hobbyists target it with STM32CubeIDE, PlatformIO, and the Arduino STM32 core, and any prototype firmware written on the Blue Pill ports directly to custom hardware when the same MCU is kept on the production board. The LQFP-48 footprint is also shared by several GD32 and APM32 pin-compatibles, simplifying second sourcing for educational kits.

🧩

IoT Sensor / Smart Home Edge Nodes

The STM32F103C8T6 handles Smart Home and IoT edge nodes that need local sensor aggregation, BLE/Wi-Fi module handshaking, and OTA bootloading without committing to a high-cost M4-class part. Three USARTs (USART1/2/3) drive an ESP-01 Wi-Fi co-processor, a GPS module, and a debug console in parallel; two SPIs (up to 18 Mbit/s) talk to a LoRa SX1278 or a small TFT display; two I2C buses serve a BME280 environmental sensor and an OLED panel. The 12-bit ADC samples analog sensors such as soil-moisture probes, and the RTC plus 4-byte backup register keep a wall-clock time across deep-sleep cycles powered by a CR2032. The 2.0-3.6 V supply range supports direct lithium-ion battery operation via an LDO or buck.

Resumo dos produtos recomendados

STM32F103CBT6 STMicroelectronics Usado em: Industrial Control Boards, Low-Cost Development Platforms ("Blue Pill") STM32F030C8T6 STMicroelectronics Usado em: Industrial Control Boards, IoT Sensor / Smart Home Edge Nodes GD32F103C8T6 Pin-compatible second source Usado em: USB HID / Virtual COM Port Devices, BLDC / PMSM Motor Drives, CAN-Bus Node Interface, Low-Cost Development Platforms ("Blue Pill"), IoT Sensor / Smart Home Edge Nodes STM32F103C8T7 AEC-Q100 variant for harsh environments Usado em: USB HID / Virtual COM Port Devices, CAN-Bus Node Interface STM32F103RBT6 STMicroelectronics Usado em: BLDC / PMSM Motor Drives
What is the operating voltage of STM32F103C8T6?
The STM32F103C8T6 operates from a single 2.0 V to 3.6 V supply. According to the STMicroelectronics datasheet, the part includes an internal voltage regulator that generates the 1.8 V core supply from VDD, and a separate VDDA pin (2.4 V to 3.6 V) is required for the ADC block. Designers should place 100 nF decoupling capacitors on every VDD/VDDA pin pair and ensure the voltage ramp respects the power-on reset thresholds.
How much Flash and SRAM does the STM32F103C8T6 have?
The STM32F103C8T6 integrates 64 KB of Flash memory and 20 KB of SRAM. The 'C8' device code indicates the 48-pin medium-density package class with 64 KB Flash, while larger 'CB' (128 KB) variants in the same package footprint exist within the STM32F103 family. Flash endurance is rated at 10 k cycles minimum with 128-bit-wide access, and SRAM is retained across Standby and Stop modes when the backup regulator is enabled.
What is the maximum clock frequency of STM32F103C8T6?
The Cortex-M3 core in the STM32F103C8T6 runs at up to 72 MHz on the medium-density line, derived from an 8 MHz internal RC oscillator multiplied by a 9x PLL. At 72 MHz the core delivers 90 DMIPS (1.25 DMIPS/MHz). Source: STMicroelectronics STM32F103x8/xB datasheet (RM0008 reference manual). Note that drop-in alternatives such as GD32F103C8T6 support 108 MHz, which requires re-tuning Flash wait states.
What package does STM32F103C8T6 use and what is its pin count?
The STM32F103C8T6 ships in a 48-pin LQFP package measuring 7x7 mm with a 0.5 mm lead pitch (ST commercial code 'T6'). The device exposes 37 GPIO pins, plus power, ground, oscillator, reset, boot mode, and JTAG/SWD debug pins. Footprints are shared with the 48-pin LQFP variants of GD32F103C8T6, APM32F103C8T6, and STM32F103CBT6 for true drop-in compatibility.
Where can I buy the STM32F103C8T6 right now?
The STM32F103C8T6 is available from major authorized distributors including DigiKey, Mouser, Arrow, LCSC, and AliExpress. As of 2026-10-10, distributor inventory is mixed and lead times for large production quantities have stretched to 16-22 weeks at several channels, which has driven strong demand for the GD32F103C8T6 second source. Small quantities (1-100 pieces) are typically stocked; production volumes should be confirmed with the sales team before committing.
What is the current price of STM32F103C8T6 in 100-piece quantities?
The STM32F103C8T6 unit price is approximately USD 2.45 at qty 100, USD 2.18 at qty 500, and USD 1.92 at qty 1000 as of 2026-10-10, sourced from major authorized distributors. Pricing fluctuates with the 2026 allocation cycle; sourcing through LCSC for a Chinese-market alternative such as GD32F103C8T6 can drop the BOM cost to roughly USD 0.45 at qty 1000. Always request a current quote before budgeting because allocation-driven price swings of ±30 percent are common in this family.
What is the lead time for STM32F103C8T6 in 2026?
Lead times for the STM32F103C8T6 in 2026 extend 16-22 weeks for production volumes through several authorized distributors, reflecting ongoing allocations in the STM32F1 line. Engineering and small-prototype quantities (under 100 pieces) are typically shippable from local stock. Where lead time is unacceptable, GigaDevice GD32F103C8T6 (Cortex-M3, 108 MHz, same LQFP-48 footprint) is the most common pin-and-footprint second source.
STM32F103C8T6 vs STM32F103CBT6 - which should I choose?
The STM32F103CBT6 is a direct drop-in upgrade in the same LQFP-48 footprint with 128 KB Flash (versus 64 KB on the C8T6). Both share identical peripherals, voltage range (2.0 V to 3.6 V), and 72 MHz clock; the CBT6 simply doubles program memory. Choose C8T6 when 64 KB is sufficient and BOM cost is paramount; choose CBT6 when firmware headroom is needed or firmware may grow during development.
Is the GD32F103C8T6 a true drop-in replacement for STM32F103C8T6?
The GD32F103C8T6 from GigaDevice is widely documented as a pin-and-software-compatible drop-in replacement for the STM32F103C8T6 in the same LQFP-48 footprint. Key differences: the GD32 Cortex-M3 core runs up to 108 MHz (versus 72 MHz on STM32), the Flash wait-state configuration differs, and a small number of register/SRAM-edge behaviors require firmware review before production use. Most STM32 HAL code ports with only clock-tree adjustments.
What is the best drop-in replacement for STM32F103C8T6?
The best cross-brand drop-in replacement is the GD32F103C8T6 from GigaDevice: same LQFP-48 footprint (7x7 mm, 0.5 mm pitch), same ARM Cortex-M3 architecture, same registers, and largely software-compatible firmware. Other pin-compatible options include APM32F103C8T6 (Geehy) and AT32F403ACGT7 (Artery), each with minor clock or peripheral caveats. All three drop-ins substitute the original on the same PCB land pattern with no rework.
Should I use the STM32F103C8T6 or STM32F030C8T6 for a new design?
For new designs in 2026, the STM32F030C8T6 (Cortex-M0, 48 MHz) is the more modern ST choice when the application does not need USB or CAN, and the STM32G071CBT6 or STM32G431KB is recommended when newer peripherals (USB Type-C, FPU, higher ADC speed) matter. The STM32F103C8T6 remains a strong pick when firmware reuse, mature ecosystem, or USB and CAN requirements make porting unnecessary.
Where can I download the STM32F103C8T6 datasheet as a PDF?
The official datasheet PDF is hosted on the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32f103c8.pdf. The companion reference manual is RM0008 (STM32F100/101/102/103/105/107 advanced Arm-based 32-bit MCUs). Both documents cover electrical characteristics, memory mapping, peripheral registers, and package information. Third-party mirror sites exist but should not be cited for compliance evidence.
Where is the pinout diagram for STM32F103C8T6 in the datasheet?
The pinout diagram is located in the STM32F103x8/xB datasheet section labeled 'Pinouts and pin description', immediately after the package mechanical drawing. For the LQFP-48 (commercial code T6, 7x7 mm body, 0.5 mm pitch) the diagram shows pins numbered 1 through 48 counter-clockwise starting from the top-left pin (pin-1 marker dot). ADCs, USARTs, I2C, SPI, USB, CAN, and oscillator pins are highlighted in the alternate-function tables on the same pages.
What is the difference between STM32F103C8T6 and STM32F103R8T6?
The STM32F103C8T6 and STM32F103R8T6 are both medium-density STM32F103 Cortex-M3 parts running at 72 MHz, but they differ in pin count: C8T6 is 48-pin LQFP (7x7 mm) while R8T6 is 64-pin LQFP (10x10 mm). The R8T6 therefore exposes more GPIO, more USART instances, and additional peripheral remap options. Choose C8T6 for compact boards and R8T6 when extra peripheral channels are needed; both are pin-compatible within the STM32 family but cannot be PCB-swapped on the same footprint.
Is the STM32F103C8T6 still in production, and is it RoHS compliant?
The STM32F103C8T6 is currently listed as ACTIVE in STMicroelectronics' lifecycle database and remains in production. The part is supplied RoHS-compliant in lead-free LQFP packaging, fully compatible with Pb-free reflow profiles up to 260 °C peak (JEDEC J-STD-020 MSL3). For automotive-grade AEC-Q100 qualification, ST sells the STM32F103C8T7 (-40 °C to +105 °C) qualified variant; choose it explicitly for vehicle applications.

Dados de referência de engenharia para STM32F103C8T6 — comparação, orientação de projeto e informações de conformidade.

Guia de seleção

Escolha o STM32F103C8T6 quando precisar do dispositivo ARM Cortex-M3 de 72 MHz mais familiar com USB, CAN, três USARTs e 64 KB de Flash, e quiser middleware do fabricante totalmente suportado no STM32CubeIDE. Escolha o STM32F103CBT6 (mesma footprint LQFP-48, 128 KB de Flash) quando o firmware estiver se aproximando do limite de 64 KB. Escolha o STM32F103C8T7 (AEC-Q100, 105 °C) quando a aplicação for automotiva ou industrial severa. Escolha o GD32F103C8T6 (GigaDevice, 108 MHz, mesma footprint) quando os prazos de entrega se estenderem ou precisar de um aumento de clock de 50 % com pequena revisão de firmware. Escolha o STM32F030C8T6 (M0, 48 MHz) apenas quando USB e CAN não forem necessários; custa aproximadamente USD 0,50 menos por unidade. A footprint LQFP-48 é compartilhada entre todas as cinco peças, portanto o layout da PCB e a BOM são intercambiáveis dentro desta árvore de seleção.

Comparação com alternativas

Parâmetro Este produto STM32F103CBT6 STM32F103C8T7 GD32F103C8T6 APM32F103C8T6 STM32F030C8T6
Brand STMicroelectronics STMicroelectronics STMicroelectronics GigaDevice GigaDevice STMicroelectronics
Package LQFP-48 (7x7 mm) LQFP-48 (7x7 mm) - same LQFP-48 (7x7 mm) - same LQFP-48 (7x7 mm) - same LQFP-48 (7x7 mm) - same LQFP-48 (7x7 mm) - same
Core ARM Cortex-M3 ARM Cortex-M3 ARM Cortex-M3 ARM Cortex-M3 ARM Cortex-M3 ARM Cortex-M0 (-1 class)
Max Clock 72 MHz 72 MHz 72 MHz 108 MHz (+50%) 96 MHz (+33%) 48 MHz (-33%)
Flash 64 KB 128 KB (+100%) 64 KB 64 KB 64 KB 64 KB
SRAM 20 KB 20 KB 20 KB 20 KB 20 KB 8 KB (-60%)
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 No USB
CAN 1x CAN 2.0B 1x CAN 2.0B 1x CAN 2.0B 1x CAN 2.0B 1x CAN 2.0B No CAN
Automotive Grade No (industrial -40/+85C) No Yes (AEC-Q100) No No No

Principais diferenciais

  • Drop-in compatível em pinagem com Flash dobrada dentro da mesma família (vs STM32F103CBT6)
  • Grau de temperatura automotivo AEC-Q100 disponível no mesmo silício/die (vs STM32F103C8T7)
  • Núcleo de duas a quatro vezes mais rápido na mesma footprint LQFP-48 (vs GD32F103C8T6)

Notas de projeto

Coloque capacitores cerâmicos de desacoplamento de 100 nF o mais próximo possível de cada par de pinos VDD/VDDA (pinos 24, 36, 48 / 9), com pelo menos um capacitor de bulk de 4,7 µF no trilho principal de 3,3 V a menos de 20 mm. VDDA requer uma conexão de baixa impedância; se a alimentação principal de 3,3 V for ruidosa, insira um ferrite bead entre VDD e VDDA. Conecte VBAT ao VDD se não for usada bateria de backup. Mantenha sempre o pino BOOT0 em nível baixo na energização para o boot padrão a partir da Flash.

Roteie as trilhas do cristal HSE de 8 MHz curtas e simétricas, com o cristal colocado a menos de 5 mm de OSC_IN/OSC_OUT (pinos 5/6) e os capacitores de carga (tipicamente 20-30 pF) aterrados junto à carcaça do cristal. Mantenha USB D+/D- (PA11/PA12) com comprimentos casados (delta alvo <2 mm) e coloque o pull-up de 1,5 kΩ em D+ próximo ao conector, não do lado do MCU. Forneça um pull-up de 10 kΩ em NRST e um caminho de baixa impedância para GND através de um botão de reset.

Ao usar CAN ou USB, adicione um array de diodos TVS como USBLC6-2SC6 ou PESD1CAN próximo ao conector para atender às classificações IEC 61000-4-2 de ±8 kV descarga aérea e ±4 kV descarga por contato. O pull-up interno em USB D+ (PA12) não é forte o suficiente para enumeração confiável; recomenda-se um resistor externo de 1,5 kΩ para 3,3 V. A terminação do barramento CAN deve usar 120 Ω apenas nas duas extremidades, com uma rede de capacitor dividido para supressão de stub em chicotes multi-nó.

Não deixe BOOT0 flutuando - ruído neste pino durante a energização fará o MCU inicializar intermitentemente no bootloader do sistema e o código da aplicação parecerá ausente. Três erros comuns: (1) deixar VBAT flutuando em vez de conectá-lo ao VDD, o que carrega o diodo interno e corrompe as escritas no registrador de backup; (2) usar PA13/PA14 como GPIO sem desabilitar JTAG/SWD, pois o JTAG usa esses pinos por padrão após o reset; (3) configurar a velocidade de saída GPIO para '50 MHz' nos pinos I2C, o que causa ringing - selecione sempre '2 MHz' open-drain com pull-ups externos.

Informações de conformidade

RoHS
Compliant
REACH
Compliant
AEC-Q100
Sem chumbo
Sem halogênios
Unknown
Minerais de conflito
Compliant

RoHS-compliant per ST product page; AEC-Q100 grade is a separate SKU (STM32F103C8T7). Halogen-free status not explicitly verified in the provided data and flagged as 'unknown'.

Dados verificados em: 2026-10-10 — dados verificados e curados pela equipe de engenharia de componentes da XAIPART

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Componentes & termos relacionados

STMicroelectronics STM32F103C8T6 STM32F103CBT6 STM32F103C8T7 GD32F103C8T6 APM32F103C8T6 STM32F030C8T6 ARM Cortex-M3 32-bit MCU microcontroller STM32 LQFP-48 LQFP surface mount USB 2.0 Full-Speed CAN 2.0B RoHS AEC-Q100 I2C SPI USART ADC Blue Pill STM32CubeIDE
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