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Contents

README

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STM32F103C8T6-TD

TDSEMIC · Microcontrollers (MCU/MPU/SOC) · LQFP-48(7x7)

STM32F103C8T6-TD from TDSEMIC, in a LQFP-48(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model, then checked against ST open pin data); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VBAT power_in Backup domain power supply pin, 1.8V to 3.6V range.
2 PC13-TAMPER-RTC bidirectional STD 3.3V standard I/O PC13 with default alternate function TAMPER-RTC.
3 PC14-OSC32_IN bidirectional STD 3.3V standard I/O PC14 with default alternate function OSC32_IN (32.768kHz crystal input).
4 PC15-OSC32_OUT bidirectional STD 3.3V standard I/O PC15 with default alternate function OSC32_OUT (32.768kHz crystal output).
5 PD0-OSC_IN input OSC_IN input, STD structure, remappable as PD0 (HSE 4-16MHz crystal/ceramic resonator input).
6 PD1-OSC_OUT output OSC_OUT output, STD structure, remappable as PD1 (HSE crystal/ceramic resonator output).
7 NRST bidirectional Bidirectional reset pin with built-in weak pull-up resistor (RST structure).
8 VSSA power_in Analog ground supply pin.
9 VDDA power_in Analog power supply pin, 2.0V to 3.6V range.
10 PA0-WKUP bidirectional STDA I/O PA0 with WKUP, USART2_CTS, ADC12_IN0 and TMR2_CH1_ETR alternate functions.
11 PA1 bidirectional STDA I/O with USART2_RTS, ADC12_IN1 and TMR2_CH2 alternate functions.
12 PA2 bidirectional STDA I/O with USART2_TX, ADC12_IN2 and TMR2_CH3 alternate functions.
13 PA3 bidirectional STDA I/O with USART2_RX, ADC12_IN3 and TMR2_CH4 alternate functions.
14 PA4 bidirectional STDA I/O with SPI1_NSS, USART2_CK and ADC12_IN4 alternate functions.
15 PA5 bidirectional STDA I/O with SPI1_SCK and ADC12_IN5 alternate functions.
16 PA6 bidirectional STDA I/O with SPI1_MISO, ADC12_IN6 and TMR3_CH1 alternate functions; remap TMR1_BKIN.
17 PA7 bidirectional STDA I/O with SPI1_MOSI, ADC12_IN7 and TMR3_CH2 alternate functions; remap TMR1_CH1N.
18 PB0 bidirectional STDA I/O with ADC12_IN8 and TMR3_CH3 alternate functions; remap TMR1_CH2N.
19 PB1 bidirectional STDA I/O with ADC12_IN9 and TMR3_CH4 alternate functions; remap TMR1_CH3N.
20 PB2 bidirectional 5V-tolerant (5T) I/O, PB2 which also serves as BOOT1 after reset.
21 PB10 bidirectional 5V-tolerant I/O with I2C2_SCL and USART3_TX alternate functions; remap TMR2_CH3.
22 PB11 bidirectional 5V-tolerant I/O with I2C2_SDA and USART3_RX alternate functions; remap TMR2_CH4.
23 VSS_1 power_in Digital ground supply pin.
24 VDD_1 power_in Digital power supply pin, 2.0V to 3.6V range.
25 PB12 bidirectional 5V-tolerant I/O with SPI2_NSS, I2C2_SMBAI, USART3_CK and TMR1_BKIN alternate functions.
26 PB13 bidirectional 5V-tolerant I/O with SPI2_SCK, USART3_CTS and TMR1_CH1N alternate functions.
27 PB14 bidirectional 5V-tolerant I/O with SPI2_MISO, USART3_RTS and TMR1_CH2N alternate functions.
28 PB15 bidirectional 5V-tolerant I/O with SPI2_MOSI and TMR1_CH3N alternate functions.
29 PA8 bidirectional 5V-tolerant I/O with USART1_CK, TMR1_CH1 and MCO alternate functions.
30 PA9 bidirectional 5V-tolerant I/O with USART1_TX and TMR1_CH2 alternate functions.
31 PA10 bidirectional 5V-tolerant I/O with USART1_RX and TMR1_CH3 alternate functions.
32 PA11 bidirectional 5V-tolerant I/O with USART1_CTS, USBDDM, CAN_RX and TMR1_CH4 alternate functions.
33 PA12 bidirectional 5V-tolerant I/O with USART1_RTS, USBDDP, CAN_TX and TMR1_ETR alternate functions.
34 PA13 bidirectional 5V-tolerant I/O, reset function JTMS/SWDIO.
35 VSS_2 power_in Digital ground supply pin.
36 VDD_2 power_in Digital power supply pin, 2.0V to 3.6V range.
37 PA14 bidirectional 5V-tolerant I/O, reset function JTCK/SWCLK.
38 PA15 bidirectional 5V-tolerant I/O, reset function JTDI, remap TMR2_CH1_ETR/PA15.
39 PB3 bidirectional I/O pin PB3 shown at pin 39 in the LQFP48 pinout diagram.
40 PB4 bidirectional I/O pin PB4 shown at pin 40 in the LQFP48 pinout diagram.
41 PB5 bidirectional I/O pin PB5 shown at pin 41 in the LQFP48 pinout diagram.
42 PB6 bidirectional I/O pin PB6 shown at pin 42 in the LQFP48 pinout diagram.
43 PB7 bidirectional I/O pin PB7 shown at pin 43 in the LQFP48 pinout diagram.
44 BOOT0 input Dedicated Boot0 pin (type B) shown at pin 44 in the LQFP48 pinout diagram.
45 PB8 bidirectional I/O pin PB8 shown at pin 45 in the LQFP48 pinout diagram.
46 PB9 bidirectional I/O pin PB9 shown at pin 46 in the LQFP48 pinout diagram.
47 VSS_3 power_in Digital ground supply pin shown at pin 47 in the LQFP48 pinout diagram.
48 VDD_3 power_in Digital power supply pin shown at pin 48 in the LQFP48 pinout diagram.

Key specifications

Parameter Value
Manufacturer TDSEMIC
Package LQFP-48(7x7)
Category Embedded Processors & Controllers
Pins 48

CAD (KiCad official)

  • Symbol: STM32F103C8T6-TD
  • Footprint: Package_QFP:LQFP-48_7x7mm_P0.5mm
  • 3D model: LQFP-48(7x7) (KiCad packages3D, STEP)
  • 3D model files: stm32f103c8t6-td-etched.step / stm32f103c8t6-td-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f103c8t6-td.step / stm32f103c8t6-td.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: TDSEMIC datasheet (57 pp, sha256 a0b97873550cc31c, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (vision), consensus claude-opus-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).

Datasheet PDF