Developed by ATMEL as a successor to the popular T89C51RD2, AT89C51ED2 is an 8-bit microcontroller with powerful features such as:

64K Flash program memory 2K RAM 2K EEPROM Watchdog Timer, Brownout Detector Capture and Compare Inputs 9-sources of 4-level Interrupts. Hardware UART and SPI serial interfaces 32 general purpose I/O pins ( with 48 I/O pin option in larger packages )

AT89C51ED2 is a highly reliable microcontroller that is used in many BiPOM boards, including some of our custom projects.

AT89C51ED2-3CSIM (40-DIP) $16 AT89C51ED2-RDTIM (64-VQFP) $19 AT89C51ED2-RLTIM (44-VQFP) $19 AT89C51ED2-SLSIM (44-PLCC) $12

Datasheet
ATMEL-based Products
ATMEL Web Site