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CH32F103C8T6
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WCH(Jiangsu Qin Heng) Microcontroller Units (MCUs/MPUs/SOCs), LQFP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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Datasheet
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README
markdownCH32F103C8T6
WCH(Jiangsu Qin Heng) · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-48(7x7)
CH32F103C8T6 from WCH(Jiangsu Qin Heng), in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBAT | power_in | Backup supply of 1.8~5.5V (not above VDD) that powers the RTC, external 32kHz oscillator and backup registers when VDD is off. |
| 2 | PC13 | bidirectional | General I/O PC13 after reset, with TAMPER-RTC as default alternate function. |
| 3 | PC14 | bidirectional | I/O/analog pin PC14 after reset, with OSC32_IN (32.768kHz crystal input) as default alternate function. |
| 4 | PC15 | bidirectional | I/O/analog pin PC15 after reset, with OSC32_OUT (32.768kHz crystal output) as default alternate function. |
| 5 | OSC_IN | input | Analog/Schmitt input for the 4~16MHz HSE crystal or external clock; can be remapped to PD0. |
| 6 | OSC_OUT | output | Analog/CMOS output for the 4~16MHz HSE crystal; can be remapped to PD1. |
| 7 | NRST | bidirectional | External reset I/O pin with internal weak pull-up of 30~55kΩ, low-level input max 0.8V. |
| 8 | VSSA | power_in | Analog ground, must be connected to VSS. |
| 9 | VDDA | power_in | Analog supply of 2.7 |
| 10 | PA0-WKUP | bidirectional | I/O/analog PA0 with WKUP, USART2_CTS, ADC_IN0, TIM2_CH1 and TIM2_ETR alternate functions. |
| 11 | PA1 | bidirectional | I/O/analog PA1 with USART2_RTS, ADC_IN1 and TIM2_CH2 alternate functions. |
| 12 | PA2 | bidirectional | I/O/analog PA2 with USART2_TX, ADC_IN2 and TIM2_CH3 alternate functions. |
| 13 | PA3 | bidirectional | I/O/analog PA3 with USART2_RX, ADC_IN3 and TIM2_CH4 alternate functions. |
| 14 | PA4 | bidirectional | I/O/analog PA4 with SPI1_NSS, USART2_CK, ADC_IN4 and DAC_OUT1 alternate functions. |
| 15 | PA5 | bidirectional | I/O/analog PA5 with SPI1_SCK, ADC_IN5 and DAC_OUT2 alternate functions. |
| 16 | PA6 | bidirectional | I/O/analog PA6 with SPI1_MISO, ADC_IN6 and TIM3_CH1; remap TIM1_BKIN. |
| 17 | PA7 | bidirectional | I/O/analog PA7 with SPI1_MOSI, ADC_IN7 and TIM3_CH2; remap TIM1_CH1N. |
| 18 | PB0 | bidirectional | I/O/analog PB0 with ADC_IN8 and TIM3_CH3; remap TIM1_CH2N. |
| 19 | PB1 | bidirectional | I/O/analog PB1 with ADC_IN9 and TIM3_CH4; remap TIM1_CH3N. |
| 20 | PB2/BOOT1 | bidirectional | General I/O PB2, also serves as BOOT1 boot mode select. |
| 21 | PB10 | bidirectional | I/O PB10 with I2C2_SCL and USART3_TX; remap TIM2_CH3. |
| 22 | PB11 | bidirectional | I/O PB11 with I2C2_SDA and USART3_RX; remap TIM2_CH4. |
| 23 | VSS_1 | power_in | Digital ground. |
| 24 | VDD_1 | power_in | Digital supply of 2.7~5.5V for I/O, RC oscillators, reset module and voltage regulator. |
| 25 | PB12 | bidirectional | I/O PB12 with SPI2_NSS, I2C2_SMBAI, USART3_CK and TIM1_BKIN. |
| 26 | PB13 | bidirectional | I/O PB13 with SPI2_SCK, USART3_CTS and TIM1_CH1N. |
| 27 | PB14 | bidirectional | I/O PB14 with SPI2_MISO, USART3_RTS and TIM1_CH2N. |
| 28 | PB15 | bidirectional | I/O PB15 with SPI2_MOSI and TIM1_CH3N. |
| 29 | PA8 | bidirectional | I/O PA8 with USART1_CK, TIM1_CH1 and MCO. |
| 30 | PA9 | bidirectional | I/O PA9 with USART1_TX and TIM1_CH2. |
| 31 | PA10 | bidirectional | I/O PA10 with USART1_RX and TIM1_CH3. |
| 32 | PA11 | bidirectional | I/O/analog PA11 with USART1_CTS, USBDM, CAN_RX and TIM1_CH4. |
| 33 | PA12 | bidirectional | I/O/analog PA12 with USART1_RTS, USBDP, CAN_TX and TIM1_ETR. |
| 34 | PA13 | bidirectional | I/O pin whose main function after reset is SWDIO (serial wire debug data). |
| 35 | VSS_2 | power_in | Digital ground. |
| 36 | VDD_2 | power_in | Digital supply of 2.7~5.5V. |
| 37 | PA14 | bidirectional | I/O pin whose main function after reset is SWCLK (serial wire debug clock). |
| 38 | PA15 | bidirectional | I/O PA15 with remap functions TIM2_CH1/TIM2_ETR and SPI1_NSS. |
| 39 | PB3 | bidirectional | I/O PB3 with remap functions TRACESWO, TIM2_CH2 and SPI1_SCK. |
| 40 | PB4 | bidirectional | I/O PB4 with remap functions TIM3_CH1 and SPI1_MISO. |
| 41 | PB5 | bidirectional | I/O PB5 with I2C1_SMBAI; remap TIM3_CH2 and SPI1_MOSI. |
| 42 | PB6 | bidirectional | I/O/analog PB6 with I2C1_SCL, TIM4_CH1 and USBHDM; remap USART1_TX. |
| 43 | PB7 | bidirectional | I/O/analog PB7 with I2C1_SDA, TIM4_CH2 and USBHDP; remap USART1_RX. |
| 44 | BOOT0 | input | Boot mode select input, used with BOOT1 to choose flash, system memory or SRAM boot. |
| 45 | PB8 | bidirectional | I/O/analog PB8 with TIM4_CH3; remap I2C1_SCL and CAN_RX. |
| 46 | PB9 | bidirectional | I/O/analog PB9 with TIM4_CH4; remap I2C1_SDA and CAN_TX. |
| 47 | VSS_3 | power_in | Digital ground. |
| 48 | VDD_3 | power_in | Digital supply of 2.7~5.5V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | WCH(Jiangsu Qin Heng) |
| Package | LQFP-48(7x7) |
| Category | Single Chip Microcomputer/Microcontroller |
| Pins | 48 |
CAD (KiCad official)
- Symbol:
CH32F103C8T6 - Footprint:
Package_QFP:LQFP-48_7x7mm_P0.5mm - 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
- 3D model files:
ch32f103c8t6-etched.step/ch32f103c8t6-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch32f103c8t6.step/ch32f103c8t6.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: WCH(Jiangsu Qin Heng) datasheet (29 pp, sha256
1f68cc1270a5d14a, retrieved 2026-10-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).