Series: AT89C513x Core Processor: 80C51 Core Size: 8-Bit Speed: 48MHz Connectivity: I²C, SPI, UART/USART, USB Peripherals: LED, POR, PWM, WDT Number of I/O: 34 Program Memory Size: 16KB (16K x 8) FLASH EEPROM Size: 4K x 8 RAM Size: 1.25K x 8 Voltage - Supply (Vcc/Vdd): 2.7 V ~ 5.5 V Data Converters: - Oscillator Type: Internal Operating Temperature: -40°C ~ 85°C (TA) Package / Case: 64-LQFP