Model:P89C664HFBD/00,557 BRAND:NXP SERIES:89C pack:tray Part status:Discontinued Core processor:8051 speed:33MHz Coprocessor/DSP:I2C,UART/USART RAM Controller:POR,PWM,WDT Voltage:4.75V ~ 5.25V Operating temperature:- Safety features:interior Encapsulation/Shell:-40°C ~ 85°C(TA) Supplier device packaging:Surface mount type description:IC MCU 8BIT 64KB FLASH 44LQFP