Product Category 32-bit MCU Microcontroller Series GD32F103xx Mounting Type SMT Package / Case QFN-36_6X6MM-EP Operating Temperature -40℃ to +85℃ Interface I²C, USART, SPI Part Status Active CPU Core ARM Cortex-M3 Core Speed (Max) 108MHz Number of I/O 26 Program Memory Size 3072KB Program Memory Type Flash Operating Voltage 2.6V to 3.6V Length x Width / Size 6.00 x 6.00mm Storage Temperature -55℃ to +150℃ Original Manufacturer GigaDevice Semiconductor (Beijing) Inc. Country of Origin China Height 0.95mm Component Lifecycle Active Lead Spacing 0.50mm Max Clock Frequency 25MHz Number of Pins 36Pin