INTEGRATED CIRCUITS 89C51RB2/89C51RC2/89C51RD2 80.
89C51RC2 - 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
T89C51RC2 - (T89C51RB2/RC2) 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
AT89C51RC2 - 8-bit Microcontroller
P89C51RC2 - 8-bit Flash microcontroller