STM32F103RET6 - 72MHz Cortex-M3, 512KB Flash MCU | STMicroelectronics
N.º da peça: STM32F103RET6 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.7969 | $3,80 |
| 10 | $2.7422 | $27,42 |
| 100 | $2.4258 | $242,58 |
| 500 | $2.3203 | $1.160,15 |
| 1.000 | $2.2148 | $2.214,80 |
STM32F103RET6 Visão geral
What is an ARM Cortex-M3 microcontroller? An MCU (microcontroller unit) integrates a processor core, program memory, data memory, and programmable peripherals on a single die, enabling standalone embedded operation. The Cortex-M3 is a 32-bit RISC core within the ARM Cortex-M family (Cortex-M0, M3, M4, M7), widely adopted for industrial control, medical instruments, and consumer electronics because of its deterministic interrupt latency, nested vectored interrupt controller (NVIC), and rich peripheral ecosystem. Within STMicroelectronics' portfolio, the STM32F1 series sits in the general-purpose performance class between entry-level STM32F0 and mainstream STM32F4 devices.
Key features of the STM32F103RET6 include 512 KB of Flash organized in 128-bit wide banks for fast code execution, 64 KB of SRAM, two I2C buses, three SPIs, two I2S, one SDIO, five USARTs, a USB 2.0 full-speed device interface, and a CAN 2.0B controller. The high-density Flash architecture supports both in-system programming (ISP) and in-application programming (IAP), and the JTAG/SWD debug interface enables serviceable designs in the field.
Technically, the Cortex-M3 core uses a 3-stage pipeline with single-cycle multiply and hardware divide. The optional memory protection unit (MPU) and 7-channel DMA controller offload data movement from the CPU, while the 16-bit timers can be cascaded into complex PWM and quadrature encoder chains for motor and power conversion.
Typical applications include motor drives and three-phase inverters, PLC I/O modules, medical devices such as blood-glucose meters, industrial communication gateways using CAN or USB, and consumer human-machine interface panels.
When designing with this device, connect VDDA to a clean filtered analog supply and configure BOOT0 correctly at reset, because boot-mode selection directly affects programming and startup behavior. The HSE crystal range (4-16 MHz) and LSE 32.768 kHz crystal must be laid out following ST AN2586 PCB guidelines to avoid radio-frequency interference.
This page synthesizes distributor availability, drop-in second sources such as GD32F103RET6, and practical design notes not found in the manufacturer datasheet, providing engineers a one-stop selection resource.
Alternativas drop-in para STM32F103RET6 — 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 STM32F103RET6 (mesmo formato e footprint) — diferindo em Package, SRAM, Flash Memory, RoHS Status, Supply Voltage.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
STM32F103RBT6
✓ Em estoque
$3.18 / unidade
Ver ficha técnica →STM32F103RCT6
✓ Em estoque
$1.6406 / unidade
Ver ficha técnica →STM32F103RGT6
✓ Em estoque
$4.15 / unidade
Ver ficha técnica →STM32F103ZET6
✓ Em estoque
$5.39 / unidade
Ver ficha técnica →GD32F103RET6
📋 Alternativa de referência (fora do catálogo)
APM32F103RET6
📋 Alternativa de referência (fora do catálogo)
HK32F103RET6
📋 Alternativa de referência (fora do catálogo)
STM32F103RET6 Classificações máximas e características elétricas
| Core Architecture | ARM Cortex-M3 32-bit RISC |
| Frequência máxima de clock | 72 MHz |
| Flash Memory | 512 KB |
| SRAM | 64 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Temperatura de operação | -40 C to +85 C (industrial) |
| Encapsulamento | LQFP-64 (10x10 mm) |
| GPIO Count | 51 |
| ADC | 3 x 12-bit, up to 21 channels |
| General-Purpose Timers | 4 x 16-bit |
| Advanced PWM Timers | 2 x 16-bit (with complementary outputs) |
| Communication Interfaces | 2 x I2C, 3 x SPI, 2 x I2S, 5 x USART, USB 2.0 FS, CAN 2.0B, SDIO |
| DMA Channels | 7 |
| Debug Interface | JTAG + Serial Wire Debug (SWD) |
| Status RoHS | Compliant |
| Tipo de montagem | Surface Mount |
Configuração de pinos do STM32F103RET6
| Pino 1 | VBAT — Backup battery supply for RTC |
| Pino 2 | PC13 — GPIO/Tamper-RTC |
| Pino 3 | PC14 — GPIO/OSC32_IN |
| Pino 4 | PC15 — GPIO/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 (2.0-3.6 V) |
| Pino 10 | PA0 — GPIO/ADC12_IN0/WKUP |
| Pino 11 | PA1 — GPIO/ADC12_IN1 |
| Pino 12 | PA2 — GPIO/USART1_TX/ADC12_IN2 |
| Pino 13 | PA3 — GPIO/USART1_RX/ADC12_IN3 |
| Pino 14 | PA4 — GPIO/SPI1_NSS/ADC12_IN4 |
| Pino 15 | PA5 — GPIO/SPI1_SCK/ADC12_IN5 |
| Pino 16 | PA6 — GPIO/SPI1_MISO/ADC12_IN6 |
| Pino 17 | PA7 — GPIO/SPI1_MOSI/ADC12_IN7 |
| Pino 18 | PB0 — GPIO/ADC12_IN8 |
| Pino 19 | PB1 — GPIO/ADC12_IN9 |
| Pino 20 | PB2 — GPIO/BOOT1 |
| Pino 21 | PB10 — GPIO/I2C2_SCL/USART3_TX |
| Pino 22 | PB11 — GPIO/I2C2_SDA/USART3_RX |
| Pino 23 | VSS_1 — Ground |
| Pino 24 | VDD_1 — Digital supply (2.0-3.6 V) |
| Pino 25 | PB12 — GPIO/SPI2_NSS |
| Pino 26 | PB13 — GPIO/SPI2_SCK |
| Pino 27 | PB14 — GPIO/SPI2_MISO |
| Pino 28 | PB15 — GPIO/SPI2_MOSI |
| 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/USBDM/CAN_RX |
| Pino 33 | PA12 — GPIO/USBDP/CAN_TX |
| Pino 34 | PA13 — GPIO/JTMS-SWDIO |
| Pino 35 | VSS_2 — Ground |
| Pino 36 | VDD_2 — Digital supply (2.0-3.6 V) |
| Pino 37 | PA14 — GPIO/JTCK-SWCLK |
| Pino 38 | PA15 — GPIO/JTDI/TIM1_CH3 |
| Pino 39 | PB3 — GPIO/JTDO/TRACESWO |
| Pino 40 | PB4 — GPIO/JTRST |
| Pino 41 | PB5 — GPIO/I2C1_SMBAI |
| Pino 42 | PB6 — GPIO/I2C1_SCL/TIM4_CH1 |
| Pino 43 | PB7 — GPIO/I2C1_SDA/TIM4_CH2 |
| Pino 44 | BOOT0 — Boot mode selection at reset |
| Pino 45 | PB8 — GPIO/TIM4_CH3 |
| Pino 46 | PB9 — GPIO/TIM4_CH4 |
| Pino 47 | VSS_3 — Ground |
| Pino 48 | VDD_3 — Digital supply (2.0-3.6 V) |
| Pino 49 | PE0 — GPIO/TIM4_ETR |
| Pino 50 | PE1 — GPIO |
| Pino 51 | PE2 — GPIO/TRACECK |
| Pino 52 | PE3 — GPIO/TRACED0 |
| Pino 53 | PE4 — GPIO/TRACED1 |
| Pino 54 | PE5 — GPIO/TRACED2 |
| Pino 55 | PE6 — GPIO/TRACED3 |
| Pino 56 | PE7 — GPIO |
| Pino 57 | PE8 — GPIO/TIM1_CH1N |
| Pino 58 | PE9 — GPIO/TIM1_CH1 |
| Pino 59 | PE10 — GPIO/TIM1_CH2N |
| Pino 60 | PE11 — GPIO/TIM1_CH2 |
| Pino 61 | PE12 — GPIO/TIM1_CH3N |
| Pino 62 | PE13 — GPIO/TIM1_CH3 |
| Pino 63 | PE14 — GPIO/TIM1_CH4 |
| Pino 64 | PE15 — GPIO/TIM1_BKIN |
Aplicações típicas
STM32F103RET6 é adequado para 6 aplicaçãos: Brushless DC Motor Drive, Industrial CAN Gateway, Medical Blood-Glucose Meter, PLC Digital I/O Module, USB Human Interface Device, Consumer HMI Touch Panel.
Brushless DC Motor Drive
The STM32F103RET6 fits three-phase BLDC and PMSM motor drives because its two advanced 16-bit timers provide complementary PWM outputs with programmable dead-time insertion, while the 72 MHz Cortex-M3 executes field-oriented control loops in well under 10 us. The three 12-bit ADCs sample phase currents simultaneously at 1 us conversion rates, and the CAN 2.0B interface streams telemetry to a vehicle or industrial controller. A typical 1 kW inverter running FOC at 20 kHz PWM leaves ample CPU margin to host a small RTOS for fault handling and encoder feedback.
Recomendado
Industrial CAN Gateway
The STM32F103RET6 serves CAN-to-USB and CAN-to-Ethernet gateway applications because it integrates a bxCAN 2.0B interface, a USB 2.0 full-speed device, and five USARTs without external bridge chips. The 512 KB Flash holds a CANopen or J1939 stack alongside the gateway logic, while the 64 KB SRAM buffers CAN frames at 1 Mbit/s bus loads. The Cortex-M3 NVIC handles time-critical CAN RX interrupts deterministically within 12 cycles, which is essential for industrial protocols that drop frames on jitter.
Recomendado
Medical Blood-Glucose Meter
The STM32F103RET6 is widely used in handheld medical meters because the 72 MHz core runs electrochemical sensor algorithms in real time while the 12-bit ADC reads picoampere-scale currents through on-chip amplifiers. The low-power Run, Sleep, and Stop modes (down to ~10 uA in Standby) extend battery life across multi-month shelf-life targets, and the USB 2.0 FS device interface charges the battery and uploads logs to a PC. The 512 KB Flash stores reference tables, calibration curves, and a small UI library for the LCD interface.
Recomendado
PLC Digital I/O Module
The STM32F103RET6 fits 32-channel PLC digital I/O modules because its 51 GPIO drive opto-isolated inputs and relay coils directly, while its 7 DMA channels offload filter debouncing and pulse counting without CPU intervention. The five USARTs and one CAN bus link to the fieldbus master, and the Cortex-M3 executes ladder-logic interpretation or IEC 61131-3 soft-PLC runtimes in 512 KB Flash with comfortable margin. Industrial -40 C to +85 C operation matches IEC 60068 cabinet specifications.
Recomendado
USB Human Interface Device
The STM32F103RET6 is ideal for USB HID peripherals such as custom keyboards, foot controllers, and industrial pendants because the on-chip USB 2.0 full-speed device controller, 72 MHz CPU, and 512 KB Flash hold the USB stack plus HID report logic with no external PHY. The five USARTs and timers can drive LED indicators and rotary encoders concurrently, and the 12-bit ADC reads potentiometer position at 1 MSps. ST's USB Device Library provides ready HID, CDC, and DFU class examples for quick bring-up.
Recomendado
Consumer HMI Touch Panel
The STM32F103RET6 drives small TFT touch panels because the three SPIs drive LCD controllers at 36 MHz, and the 12-bit ADC reads a resistive touch overlay with on-chip timers handling periodic sampling via DMA. The 512 KB Flash stores LVGL graphics plus fonts, while the 64 KB SRAM holds double-buffered 320x240 RGB framebuffers. The SDIO interface streams images from a microSD card, and the CAN or USART connects to the host appliance.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para STM32F103RET6 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | STM32F103RBT6 | STM32F103RCT6 | STM32F103RGT6 | GD32F103RET6 | APM32F103RET6 |
|---|---|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice | Geehy |
| Core / Max Clock | Cortex-M3 / 72 MHz | Cortex-M3 / 72 MHz | Cortex-M3 / 72 MHz | Cortex-M3 / 72 MHz | Cortex-M3 / 108 MHz | Cortex-M3 / 72 MHz |
| Flash | 512 KB | 128 KB | 256 KB | 1 MB | 512 KB | 512 KB |
| SRAM | 64 KB | 20 KB | 48 KB | 96 KB | 64 KB | 64 KB |
| GPIO | 51 | 51 | 51 | 51 | 51 | 51 |
| USB / CAN | USB FS device + CAN 2.0B | USB FS + CAN | USB FS + CAN | USB FS + CAN | USB FS + CAN | USB FS + CAN |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Approx. Unit Price (qty-1, USD) | 8.20 | ~5.40 | ~6.50 | ~9.80 | ~3.10 (LCSC) | ~3.40 (LCSC) |
Principais diferenciais
- Largest Flash density in 64-pin LQFP STM32F1 line (vs STM32F103RBT6)
- Proven ecosystem with mature firmware libraries (vs GD32F103RET6)
- Stable industrial-grade supply vs volatile gray-market (vs GD32F103RET6)
Notas de projeto
Place 100 nF X7R ceramic bypass capacitors on every VDD pin (pins 24, 36, 48) within 2 mm of the package pad. Add a single 4.7 uF bulk capacitor on the VDD rail. The VDDA analog supply must be filtered through a ferrite bead and decoupled with 100 nF plus 1 uF to keep ADC noise below 1 LSB at 12-bit resolution, per ST application note AN2586 reference layouts.
Route the HSE 8 MHz crystal traces (OSC_IN at pin 5, OSC_OUT at pin 6) symmetrically and shield them with a ground guard ring; keep the crystal within 5 mm of the MCU and the load capacitors (typically 20 pF) returned to a quiet analog ground. Place the 32.768 kHz LSE crystal (PC14/PC15) similarly on the opposite PCB edge to avoid coupling with HSE through the substrate.
Do not leave BOOT0 (pin 44) floating - tie it through a 10 kOhm resistor to VSS for normal Flash boot, or to VDD for system memory bootloader (USART1 DFU) mode. A floating BOOT0 is the single most common reason new boards fail to program. Also ensure NRST (pin 7) has a 100 nF capacitor to VSS and a 10 kOhm pull-up to VDD for clean reset behavior under 1.8 V brown-out.
The STM32F103RET6 in LQFP-64 has a theta_JA of approximately 65 C/W on a 4-layer JEDEC PCB. At 72 MHz with all peripherals active, core current is ~50 mA (3.3 V x 0.050 A = 165 mW), so junction temperature rise is ~7 C above ambient - well within the 85 C industrial ceiling. No thermal copper pour is required for normal operation, though a 1 cm2 ground pour improves long-term reliability.
The USB DP/DM traces (PA11/PA12) must be 90 ohm differential, length-matched within 2 mm, and routed over a continuous ground plane. Place the 22 ohm series termination resistors close to the MCU pins. For EMI, add a common-mode choke on the USB cable side if the design will pass CE/FCC. CAN bus traces (PA11/PA12 alternate function) require 120 ohm termination at each bus end.
Informações de conformidade
RoHS compliant per ST product page. Industrial -40 C to +85 C grade; not AEC-Q100 qualified - migrate to STM32G0/G4 for automotive. Halogen-free per ST materials declaration.
