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STM32F103RBT7

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STMicroelectronics Microcontrollers (MCU/MPU/SOC), LQFP-64(10x10). Pinout checked against ST's open pin data, KiCad symbol/footprint/3D.

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STM32F103RBT7

STMicroelectronics · Microcontrollers (MCU/MPU/SOC) · LQFP-64(10x10)

STM32F103RBT7 from STMicroelectronics, in a LQFP-64(10x10). 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 supply input for the RTC and backup registers (VBAT supply for RTC and backup registers).
2 PC13 bidirectional General-purpose I/O (not 5 V tolerant, also TAMPER-RTC) supplied through the power switch, which sinks only 3 mA, so output speed must not exceed 2 MHz with a 30 pF load and the pin must not be used as a current source such as an LED driver.
3 PC14-OSC32_IN bidirectional General-purpose I/O (not 5 V tolerant, also 32 kHz oscillator input OSC32_IN) supplied through the power switch, limited to 3 mA sink, 2 MHz maximum output speed at 30 pF, and no current-source use.
4 PC15-OSC32_OUT bidirectional General-purpose I/O (not 5 V tolerant, also 32 kHz oscillator output OSC32_OUT) supplied through the power switch, limited to 3 mA sink, 2 MHz maximum output speed at 30 pF, and no current-source use.
5 OSC_IN input High-speed external oscillator input (HSE 4-16 MHz oscillator); after reset this pin is OSC_IN, and PD0 can be remapped onto it by software.
6 OSC_OUT output High-speed external oscillator output (HSE 4-16 MHz oscillator); after reset this pin is OSC_OUT, and PD1 can be remapped onto it by software.
7 NRST bidirectional Device reset pin, listed as I/O in the pin definitions; its electrical characteristics are given in section 5.3.14.
8 PC0 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN10 analog input function.
9 PC1 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN11 analog input function.
10 PC2 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN12 analog input function.
11 PC3 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN13 analog input function.
12 VSSA power_in Analog ground pin for the ADC and analog circuitry, with all voltages referenced to VSS.
13 VDDA power_in Analog supply pin for the ADC; the temperature sensor conversion range is specified as 2 V < VDDA < 3.6 V.
14 PA0-WKUP bidirectional General-purpose I/O (not 5 V tolerant) with WKUP wake-up, USART2_CTS, ADC12_IN0 and TIM2_CH1_ETR alternate functions.
15 PA1 bidirectional General-purpose I/O (not 5 V tolerant) with USART2_RTS, ADC12_IN1 and TIM2_CH2 alternate functions.
16 PA2 bidirectional General-purpose I/O (not 5 V tolerant) with USART2_TX, ADC12_IN2 and TIM2_CH3 alternate functions.
17 PA3 bidirectional General-purpose I/O (not 5 V tolerant) with USART2_RX, ADC12_IN3 and TIM2_CH4 alternate functions.
18 VSS_4 power_in Ground pin of the device, the reference for all voltages (VSS).
19 VDD_4 power_in Digital supply pin for I/Os and core; the application supply range is 2.0 to 3.6 V.
20 PA4 bidirectional General-purpose I/O (not 5 V tolerant) with SPI1_NSS, USART2_CK and ADC12_IN4 alternate functions.
21 PA5 bidirectional General-purpose I/O (not 5 V tolerant) with SPI1_SCK and ADC12_IN5 alternate functions.
22 PA6 bidirectional General-purpose I/O (not 5 V tolerant) with SPI1_MISO, ADC12_IN6, TIM3_CH1 and TIM1_BKIN (remap) alternate functions.
23 PA7 bidirectional General-purpose I/O (not 5 V tolerant) with SPI1_MOSI, ADC12_IN7, TIM3_CH2 and TIM1_CH1N (remap) alternate functions.
24 PC4 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN14 analog input function.
25 PC5 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN15 analog input function.
26 PB0 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN8, TIM3_CH3 and TIM1_CH2N (remap) alternate functions.
27 PB1 bidirectional General-purpose I/O (not 5 V tolerant) with ADC12_IN9, TIM3_CH4 and TIM1_CH3N (remap) alternate functions.
28 PB2/BOOT1 bidirectional 5 V tolerant general-purpose I/O that also carries the BOOT1 boot-mode function.
29 PB10 bidirectional 5 V tolerant general-purpose I/O with I2C2_SCL, USART3_TX and TIM2_CH3 alternate functions.
30 PB11 bidirectional 5 V tolerant general-purpose I/O with I2C2_SDA, USART3_RX and TIM2_CH4 alternate functions.
31 VSS_1 power_in Ground pin of the device, the reference for all voltages (VSS).
32 VDD_1 power_in Digital supply pin for I/Os and core; the application supply range is 2.0 to 3.6 V.
33 PB12 bidirectional 5 V tolerant general-purpose I/O with SPI2_NSS, I2C2_SMBAL, USART3_CK and TIM1_BKIN alternate functions.
34 PB13 bidirectional 5 V tolerant general-purpose I/O with SPI2_SCK, USART3_CTS and TIM1_CH1N alternate functions.
35 PB14 bidirectional 5 V tolerant general-purpose I/O with SPI2_MISO, USART3_RTS and TIM1_CH2N alternate functions.
36 PB15 bidirectional 5 V tolerant general-purpose I/O with SPI2_MOSI and TIM1_CH3N alternate functions.
37 PC6 bidirectional 5 V tolerant general-purpose I/O with TIM3_CH1 alternate function.
38 PC7 bidirectional 5 V tolerant general-purpose I/O with TIM3_CH2 alternate function.
39 PC8 bidirectional 5 V tolerant general-purpose I/O with TIM3_CH3 alternate function.
40 PC9 bidirectional 5 V tolerant general-purpose I/O with TIM3_CH4 alternate function.
41 PA8 bidirectional 5 V tolerant general-purpose I/O with USART1_CK, TIM1_CH1 and MCO alternate functions.
42 PA9 bidirectional 5 V tolerant general-purpose I/O with USART1_TX and TIM1_CH2 alternate functions.
43 PA10 bidirectional 5 V tolerant general-purpose I/O with USART1_RX and TIM1_CH3 alternate functions.
44 PA11 bidirectional 5 V tolerant general-purpose I/O with USART1_CTS, CANRX, USBDM and TIM1_CH4 alternate functions.
45 PA12 bidirectional 5 V tolerant general-purpose I/O with USART1_RTS, CANTX, USBDP and TIM1_ETR alternate functions.
46 PA13 bidirectional 5 V tolerant general-purpose I/O with JTMS/SWDIO debug function.
47 VSS_2 power_in Ground pin of the device, the reference for all voltages (VSS).
48 VDD_2 power_in Digital supply pin for I/Os and core; the application supply range is 2.0 to 3.6 V.
49 PA14 bidirectional 5 V tolerant general-purpose I/O with JTCK/SWCLK debug function.
50 PA15 bidirectional 5 V tolerant general-purpose I/O with JTDI, TIM2_CH1_ETR and SPI1_NSS (remap) alternate functions.
51 PC10 bidirectional 5 V tolerant general-purpose I/O with USART3_TX alternate function.
52 PC11 bidirectional 5 V tolerant general-purpose I/O with USART3_RX alternate function.
53 PC12 bidirectional 5 V tolerant general-purpose I/O with USART3_CK alternate function.
54 PD2 bidirectional 5 V tolerant general-purpose I/O with TIM3_ETR alternate function.
55 PB3 bidirectional 5 V tolerant general-purpose I/O with JTDO/TRACESWO debug functions and TIM2_CH2 and SPI1_SCK alternate functions.
56 PB4 bidirectional 5 V tolerant general-purpose I/O with JNTRST debug function, TIM3_CH1 and SPI1_MISO alternate functions.
57 PB5 bidirectional General-purpose I/O (not 5 V tolerant) with I2C1_SMBAL, TIM3_CH2 and SPI1_MOSI alternate functions.
58 PB6 bidirectional 5 V tolerant general-purpose I/O with I2C1_SCL, TIM4_CH1 and USART1_TX alternate functions.
59 PB7 bidirectional 5 V tolerant general-purpose I/O with I2C1_SDA, TIM4_CH2 and USART1_RX alternate functions.
60 BOOT0 input Boot mode selection input BOOT0.
61 PB8 bidirectional 5 V tolerant general-purpose I/O with TIM4_CH3, I2C1_SCL and CANRX alternate functions.
62 PB9 bidirectional 5 V tolerant general-purpose I/O with TIM4_CH4, I2C1_SDA and CANTX alternate functions.
63 VSS_3 power_in Ground pin of the device, the reference for all voltages (VSS).
64 VDD_3 power_in Digital supply pin for I/Os and core; the application supply range is 2.0 to 3.6 V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package LQFP-64(10x10)
Category Embedded Processors & Controllers
Pins 64

CAD (KiCad official)

  • Symbol: STM32F103RBT7
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: stm32f103rbt7-etched.step / stm32f103rbt7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32f103rbt7.step / stm32f103rbt7.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (117 pp, sha256 4741c03c5793745c, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF