STM32F103RET6 - 72MHz Cortex-M3, 512KB Flash MCU | STMicroelectronics
Référence : STM32F103RET6 ✓ Actif| Qté | Prix unitaire | 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 Présentation
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.
Alternatives de remplacement direct pour STM32F103RET6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STM32F103RET6 (même facteur de forme et même empreinte) — différant par Package, SRAM, Flash Memory, RoHS Status, Supply Voltage.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
STM32F103RBT6
✓ En stock
$3.18 / unité
Voir la fiche technique →STM32F103RCT6
✓ En stock
$1.6406 / unité
Voir la fiche technique →STM32F103RGT6
✓ En stock
$4.15 / unité
Voir la fiche technique →STM32F103ZET6
✓ En stock
$5.39 / unité
Voir la fiche technique →GD32F103RET6
📋 Alternative de référence (hors catalogue)
APM32F103RET6
📋 Alternative de référence (hors catalogue)
HK32F103RET6
📋 Alternative de référence (hors catalogue)
STM32F103RET6 Valeurs maximales et caractéristiques électriques
| Core Architecture | ARM Cortex-M3 32-bit RISC |
| Fréquence d'horloge maximale | 72 MHz |
| Flash Memory | 512 KB |
| SRAM | 64 KB |
| Supply Voltage (VDD) | 2.0 V to 3.6 V |
| Température de fonctionnement | -40 C to +85 C (industrial) |
| Boîtier | 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) |
| Statut RoHS | Compliant |
| Type de montage | Surface Mount |
Configuration des broches de STM32F103RET6
| Broche 1 | VBAT — Backup battery supply for RTC |
| Broche 2 | PC13 — GPIO/Tamper-RTC |
| Broche 3 | PC14 — GPIO/OSC32_IN |
| Broche 4 | PC15 — GPIO/OSC32_OUT |
| Broche 5 | OSC_IN — HSE oscillator input |
| Broche 6 | OSC_OUT — HSE oscillator output |
| Broche 7 | NRST — Reset input, active low |
| Broche 8 | VSSA — Analog ground |
| Broche 9 | VDDA — Analog supply (2.0-3.6 V) |
| Broche 10 | PA0 — GPIO/ADC12_IN0/WKUP |
| Broche 11 | PA1 — GPIO/ADC12_IN1 |
| Broche 12 | PA2 — GPIO/USART1_TX/ADC12_IN2 |
| Broche 13 | PA3 — GPIO/USART1_RX/ADC12_IN3 |
| Broche 14 | PA4 — GPIO/SPI1_NSS/ADC12_IN4 |
| Broche 15 | PA5 — GPIO/SPI1_SCK/ADC12_IN5 |
| Broche 16 | PA6 — GPIO/SPI1_MISO/ADC12_IN6 |
| Broche 17 | PA7 — GPIO/SPI1_MOSI/ADC12_IN7 |
| Broche 18 | PB0 — GPIO/ADC12_IN8 |
| Broche 19 | PB1 — GPIO/ADC12_IN9 |
| Broche 20 | PB2 — GPIO/BOOT1 |
| Broche 21 | PB10 — GPIO/I2C2_SCL/USART3_TX |
| Broche 22 | PB11 — GPIO/I2C2_SDA/USART3_RX |
| Broche 23 | VSS_1 — Ground |
| Broche 24 | VDD_1 — Digital supply (2.0-3.6 V) |
| Broche 25 | PB12 — GPIO/SPI2_NSS |
| Broche 26 | PB13 — GPIO/SPI2_SCK |
| Broche 27 | PB14 — GPIO/SPI2_MISO |
| Broche 28 | PB15 — GPIO/SPI2_MOSI |
| Broche 29 | PA8 — GPIO/USART1_CK/TIM1_CH1 |
| Broche 30 | PA9 — GPIO/USART1_TX/TIM1_CH2 |
| Broche 31 | PA10 — GPIO/USART1_RX/TIM1_CH3 |
| Broche 32 | PA11 — GPIO/USBDM/CAN_RX |
| Broche 33 | PA12 — GPIO/USBDP/CAN_TX |
| Broche 34 | PA13 — GPIO/JTMS-SWDIO |
| Broche 35 | VSS_2 — Ground |
| Broche 36 | VDD_2 — Digital supply (2.0-3.6 V) |
| Broche 37 | PA14 — GPIO/JTCK-SWCLK |
| Broche 38 | PA15 — GPIO/JTDI/TIM1_CH3 |
| Broche 39 | PB3 — GPIO/JTDO/TRACESWO |
| Broche 40 | PB4 — GPIO/JTRST |
| Broche 41 | PB5 — GPIO/I2C1_SMBAI |
| Broche 42 | PB6 — GPIO/I2C1_SCL/TIM4_CH1 |
| Broche 43 | PB7 — GPIO/I2C1_SDA/TIM4_CH2 |
| Broche 44 | BOOT0 — Boot mode selection at reset |
| Broche 45 | PB8 — GPIO/TIM4_CH3 |
| Broche 46 | PB9 — GPIO/TIM4_CH4 |
| Broche 47 | VSS_3 — Ground |
| Broche 48 | VDD_3 — Digital supply (2.0-3.6 V) |
| Broche 49 | PE0 — GPIO/TIM4_ETR |
| Broche 50 | PE1 — GPIO |
| Broche 51 | PE2 — GPIO/TRACECK |
| Broche 52 | PE3 — GPIO/TRACED0 |
| Broche 53 | PE4 — GPIO/TRACED1 |
| Broche 54 | PE5 — GPIO/TRACED2 |
| Broche 55 | PE6 — GPIO/TRACED3 |
| Broche 56 | PE7 — GPIO |
| Broche 57 | PE8 — GPIO/TIM1_CH1N |
| Broche 58 | PE9 — GPIO/TIM1_CH1 |
| Broche 59 | PE10 — GPIO/TIM1_CH2N |
| Broche 60 | PE11 — GPIO/TIM1_CH2 |
| Broche 61 | PE12 — GPIO/TIM1_CH3N |
| Broche 62 | PE13 — GPIO/TIM1_CH3 |
| Broche 63 | PE14 — GPIO/TIM1_CH4 |
| Broche 64 | PE15 — GPIO/TIM1_BKIN |
Applications typiques
STM32F103RET6 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STM32F103RET6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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) |
Principaux différenciateurs
- 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)
Notes de conception
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.
Informations de conformité
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.
