NXP Semiconductors P89C664HFBD/00,557 Connectivity: I??C, UART/USART Core Processor: 8051 Core Size: 8-Bit Data Converters: - Eeprom Size: - Number Of I /o: 32 Operating Temperature: -40?°C ~ 85?°C Oscillator Type: Internal Package / Case: 44-LQFP Peripherals: POR, PWM, WDT Program Memory Size: 64KB (64K x 8) Program Memory Type: FLASH Ram Size: 2K x 8 Series: 89C Speed: 33MHz Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V Other Names: 568-1274, 935267818557, P89C664HFBD