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STM32H503RBT6

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

componentembedded processors & controllersstm32h503rbt6factory-2.0.0extractor-text
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Symbol & Footprint

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Contents

README

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STM32H503RBT6

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

STM32H503RBT6 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 battery supply voltage (1.2 V to 3.6 V) for real-time clock, backup registers, and VBAT mode operation.
2 PC13 bidirectional General-purpose I/O port C bit 13; 5V-tolerant with tamper detection, RTC output, and WKUP4 capability.
3 PC14-OSC32_IN bidirectional Port C bit 14 serving as 32.768 kHz low-speed oscillator input for real-time clock; 5V-tolerant.
4 PC15-OSC32_OUT bidirectional Port C bit 15 serving as 32.768 kHz low-speed oscillator output for real-time clock; 5V-tolerant.
5 PH0-OSC_IN bidirectional Port H bit 0 serving as main oscillator input (4 to 50 MHz); 5V-tolerant.
6 PH1-OSC_OUT bidirectional Port H bit 1 serving as main oscillator output; 5V-tolerant.
7 NRST bidirectional System reset pin with embedded weak pull-up resistor, active low; bidirectional reset capability.
8 PC0 bidirectional General-purpose I/O port C bit 0; 5V-tolerant with analog switch and ADC1_INP10 input.
9 PC1 bidirectional General-purpose I/O port C bit 0; 5V-tolerant with analog switch, ADC1_INP11, and WKUP3 capability.
10 PC2 bidirectional General-purpose I/O port C bit 2; 5V-tolerant with analog switch and ADC1_INP12 input.
11 PC3 bidirectional General-purpose I/O port C bit 3; 5V-tolerant with analog switch and ADC1_INP13 input.
12 VSSA power_in Analog ground reference and VREF- supply; must be connected to VSS for proper analog operation.
13 VDDA power_in Analog power supply (1.62 V to 3.6 V) for ADC, DAC, OPAMP, and comparator circuits.
14 PA0 bidirectional General-purpose I/O port A bit 0; 5V-tolerant with analog switch, ADC input, and timer functions.
15 PA1 bidirectional General-purpose I/O port A bit 1; 5V-tolerant with analog switch and ADC1_INP1 input.
16 PA2 bidirectional General-purpose I/O port A bit 2; 5V-tolerant with analog switch, LPUART1_RX, and ADC input.
17 PA3 bidirectional General-purpose I/O port A bit 3; 5V-tolerant with analog switch, LPUART1_TX, and ADC input.
18 VSS power_in Digital ground for core domain; must be connected to external ground plane.
19 VDD power_in Main digital power supply (1.71 V to 3.6 V) for core and I/O domains; requires 100 nF decoupling capacitor.
20 PA4 bidirectional General-purpose I/O port A bit 4 (3.6V-tolerant); supports DAC1_OUT1 and ADC1_INP18.
21 PA5 bidirectional General-purpose I/O port A bit 5 (3.6V-tolerant); supports DAC1_OUT2, ADC input, and SPI clock.
22 PA6 bidirectional General-purpose I/O port A bit 6; 5V-tolerant with analog switch and ADC1_INP3 input.
23 PA7 bidirectional General-purpose I/O port A bit 7 (3.6V-tolerant); supports I2S MCK and ADC1_INP7 input.
24 PC4 bidirectional General-purpose I/O port C bit 4; 5V-tolerant with analog switch and ADC1_INP4 input.
25 PC5 bidirectional General-purpose I/O port C bit 5 (3.6V-tolerant); supports comparator output and ADC input.
26 PB0 bidirectional General-purpose I/O port B bit 0; 5V-tolerant with analog switch and ADC1_INP9 input.
27 PB1 bidirectional General-purpose I/O port B bit 1; 5V-tolerant with analog switch, comparator output, and ADC input.
28 PB2 bidirectional General-purpose I/O port B bit 2; 5V-tolerant with analog switch and comparator output.
29 PB10 bidirectional General-purpose I/O port B bit 10; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
30 VCAP passive External capacitor connection (2.2 µF typical) for embedded LDO regulator stabilization.
31 VSS power_in Digital ground for core domain; must be connected to external ground plane.
32 VDD power_in Main digital power supply (1.71 V to 3.6 V); requires 100 nF decoupling capacitor.
33 PB12 bidirectional General-purpose I/O port B bit 12; 5V-tolerant with high-speed low-voltage mode support.
34 PB13 bidirectional General-purpose I/O port B bit 13; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
35 PB14 bidirectional General-purpose I/O port B bit 14; 5V-tolerant with high-speed low-voltage mode support.
36 PB15 bidirectional General-purpose I/O port B bit 15; 5V-tolerant with analog switch, ADC input, and comparator output.
37 PC6 bidirectional General-purpose I/O port C bit 6; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
38 PC7 bidirectional General-purpose I/O port C bit 7; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
39 PC8 bidirectional General-purpose I/O port C bit 8; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
40 PC9 bidirectional General-purpose I/O port C bit 9; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
41 PA8 bidirectional General-purpose I/O port A bit 8; 5V-tolerant with high-speed low-voltage mode; supports MCO1 clock output.
42 PA9 bidirectional General-purpose I/O port A bit 9; 5V-tolerant with high-speed low-voltage mode; supports LPUART1_TX.
43 PA10 bidirectional General-purpose I/O port A bit 10; 5V-tolerant with high-speed low-voltage mode; supports LPUART1_RX.
44 PA11 bidirectional General-purpose I/O port A bit 11; 5V-tolerant with high-speed low-voltage mode; supports USART1 or USB DM.
45 PA12 bidirectional General-purpose I/O port A bit 12; 5V-tolerant with high-speed low-voltage mode; supports USART1 or USB DP.
46 PA13 bidirectional JTAG/SWD debug interface pin (JTMS/SWDIO); 5V-tolerant with high-speed low-voltage mode.
47 VSS power_in Digital ground for core domain; must be connected to external ground plane.
48 VDD power_in Main digital power supply (1.71 V to 3.6 V); requires 100 nF decoupling capacitor.
49 PA14 bidirectional JTAG/SWD debug interface pin (JTCK/SWCLK); 5V-tolerant with high-speed low-voltage mode.
50 PA15 bidirectional JTAG debug interface pin (JTDI); 5V-tolerant with high-speed low-voltage mode and timer support.
51 PC10 bidirectional General-purpose I/O port C bit 10; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
52 PC11 bidirectional General-purpose I/O port C bit 11; 5V-tolerant Fm+ I2C capable with high-speed low-voltage mode support.
53 PC12 bidirectional General-purpose I/O port C bit 12; 5V-tolerant with high-speed low-voltage mode support.
54 PD2 bidirectional General-purpose I/O port D bit 2; 5V-tolerant with high-speed low-voltage mode support.
55 PB3 bidirectional JTAG debug interface pin (JTDO/TRACESWO); 5V-tolerant Fm+ capable with high-speed low-voltage mode.
56 PB4 bidirectional JTAG debug interface pin (NJTRST); 5V-tolerant Fm+ capable with high-speed low-voltage mode.
57 PB5 bidirectional General-purpose I/O port B bit 5; 5V-tolerant Fm+ capable with high-speed low-voltage mode support.
58 PB6 bidirectional General-purpose I/O port B bit 6; 5V-tolerant Fm+ capable with high-speed low-voltage mode support.
59 PB7 bidirectional General-purpose I/O port B bit 7 with WKUP5 wake-up capability; 5V-tolerant Fm+ capable with high-speed low-voltage mode.
60 BOOT0 input Boot mode selection pin sampled during reset; high selects boot from system memory, low selects boot from flash.
61 PB8 bidirectional General-purpose I/O port B bit 8; 5V-tolerant Fm+ capable with high-speed low-voltage mode support.
62 VCAP passive External capacitor connection (2.2 µF typical) for embedded LDO regulator stabilization.
63 VSS power_in Digital ground for core domain; must be connected to external ground plane.
64 VDD power_in Main digital power supply (1.71 V to 3.6 V); requires 100 nF decoupling capacitor.

Key specifications

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

CAD (KiCad official)

  • Symbol: STM32H503RBT6
  • Footprint: Package_QFP:LQFP-64_10x10mm_P0.5mm
  • 3D model: LQFP-64(10x10) (KiCad packages3D, STEP)
  • 3D model files: stm32h503rbt6-etched.step / stm32h503rbt6-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); stm32h503rbt6.step / stm32h503rbt6.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (174 pp, sha256 292aba1b6fc0225b, retrieved 2026-09-24, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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