# STM32F103 USB 3V3 Dev Board ## Description Carte STM32F103 2 couches avec alimentation 3,3 V régulée, quartz 16 MHz, USB 2.0 Full-Speed, interface SWD et support de fabrication. ## Project Details - **Owner:** soraya10 - **Created:** 4/1/2026 - **Last Updated:** 4/1/2026 - **Visibility:** Public - **Operating Voltage:** 3.3V - **Implementation Details:** STM32F103C8T6 avec USB FS, quartz HSE 16MHz, régulation depuis USB 5V vers 3.3V par LDO, carte 2 couches avec interface SWD et connecteur USB. ## Key Components ### J1 — [USB-C Receptacle USB2.0](https://www.flux.ai/jharwinbarrozo/usb-c-receptacle-usb20~aqb.md) - Datasheet URL: https://media.digikey.com/pdf/Data%20Sheets/Amphenol%20PDFs/12401548E4%232A%20Drawing.pdf - Manufacturer Name: Amphenol - Role: USB Connector - Package: USB-C Receptacle - Manufacturer Part Number: 12401548E4#2A - Pin Type: Connector - Connector Type: USB-C Receptacle - Connector Positions: 16 - Role Details: Entrée VBUS 5V, D+ D-, CC1 CC2 et blindage **Pins:** - CC1 [pin A5] - CC2 [pin B5] - D- [pin B7] - D- [pin A7] - D+ [pin B6] - D+ [pin A6] - GND [pin A12] - GND [pin A1] - GND [pin B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin SH1] - VBUS [pin B4] - VBUS [pin A4] ### J2 — [FTSH-103-01-L-DV](https://www.flux.ai/cherepanyadima/ftsh-103-01-l-dv~u9.md) - Manufacturer Name: Samtec - Datasheet URL: https://suddendocs.samtec.com/catalog_english/ftsh_smt.pdf - Part Type: Connector - Package: 1.27mm 2x3 SMD Header - Role: Debug Connector - Role Details: Header SWD compact pour SWDIO, SWCLK, NRST, 3V3 et GND - Pin Type: Connector - Manufacturer Part Number: FTSH-103-01-L-DV - Connector Positions: 6 - Connector Type: SWD Header **Pins:** - 01 [pin 01] - 02 [pin 02] - 03 [pin 03] - 04 [pin 04] - 05 [pin 05] - 06 [pin 06] ### U1 — [STM32F103C8T6](https://www.flux.ai/jharwinbarrozo/stm32f103c8t6~qe2.md) - Role Details: STM32F103C8T6 principal avec USB FS, SWD et quartz 16 MHz - Manufacturer Part Number: STM32F103C8T6 - Part Type: Microcontroller - Frequency: 72MHz - Role: MCU - Manufacturer Name: STMicroelectronics - Integrated Circuit Type: Microcontroller - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811151642_STMicroelectronics-STM32F103C8T6_C8734.pdf - Package: LQFP-48 **Pins:** - BOOT0 [pin 44] - NRST [pin 7] - PA0_WKUP [pin 10] - PA1 [pin 11] - PA10 [pin 31] - PA11 [pin 32] - PA12 [pin 33] - PA13 [pin 34] - PA14 [pin 37] - PA15 [pin 38] - PA2 [pin 12] - PA3 [pin 13] - PA4 [pin 14] - PA5 [pin 15] - PA6 [pin 16] - PA7 [pin 17] - PA8 [pin 29] - PA9 [pin 30] - PB0 [pin 18] - PB1 [pin 19] - PB10 [pin 21] - PB11 [pin 22] - PB12 [pin 25] - PB13 [pin 26] - PB14 [pin 27] - PB15 [pin 28] - PB2 [pin 20] - PB3 [pin 39] - PB4 [pin 40] - PB5 [pin 41] - PB6 [pin 42] - PB7 [pin 43] - PB8 [pin 45] - PB9 [pin 46] - PC13_TAMPER_RTC [pin 2] - PC14_OSC32_IN [pin 3] - PC15_OSC32_OUT [pin 4] - PD0_OSC_IN [pin 5] - PD1_OSC_OUT [pin 6] - VBAT [pin 1] - VDD [pin 24] - VDD [pin 48] - VDD [pin 36] - VDDA [pin 9] - VSS [pin 23] - VSS [pin 47] - VSS [pin 35] - VSSA [pin 8] ### U2 — [MIC5504-3.3YM5](https://www.flux.ai/kicad-part-library/mic5504-3p3ym5~ud0.md) - Manufacturer Name: Microchip Technology Inc. - Datasheet URL: http://ww1.microchip.com/downloads/en/DeviceDoc/MIC550X.pdf - Package: SOT-23-5 - Package or Case Code: SOT-23-5 - Role Details: Régulateur 3.3V depuis VBUS USB 5V - Role: LDO - Manufacturer Part Number: MIC5504-3.3YM5 **Pins:** - EN [pin 3] - GND [pin 2] - NC [pin 4] - VIN [pin 1] - VOUT [pin 5] ### U3 — [USBLC6-2P6](https://www.flux.ai/kicad-part-library/usblc6-2p6~djt.md) - Manufacturer Part Number: USBLC6-2P6 - Datasheet URL: https://www.st.com/resource/en/datasheet/usblc6-2.pdf - Package: SOT-666 - Role: ESD Protection - Manufacturer Name: Texas Instruments Inc. - Role Details: Protection des lignes USB D+ et D- au plus près du connecteur - Pin Type: ESD Protection - Package or Case Code: SOT-666 **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### Y1 — [ECS-160-20-33-TR](https://www.flux.ai/vasy_skral/ecs-160-20-33-tr~ml.md) - Role: Clock - Datasheet URL: https://ecsxtal.com/store/pdf/ecx-32.pdf - Package: SMD Crystal 4-pad - Manufacturer Name: ECS Inc. - Role Details: Quartz externe HSE 16 MHz pour OSC_IN/OSC_OUT - Symbol Style: Parametric - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ECS-160-20-33-TR - Part Type: Oscillator **Pins:** - GND [pin 2] - GND__1 [pin 4] - IN/OUT [pin 1] - OUT/IN [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/soraya10/stm32f103-usb-3v3-dev-board~h3](https://www.flux.ai/soraya10/stm32f103-usb-3v3-dev-board~h3).* --- *Generated from [https://www.flux.ai/soraya10/stm32f103-usb-3v3-dev-board~h3](https://www.flux.ai/soraya10/stm32f103-usb-3v3-dev-board~h3)*