* 80C32/8XC52/8XC54/8XC58
* 80C51FA/8XC51FA/8XC51FB/8XC51FC
* 80C51RA+/8XC51RA+/8XC51RB+/8XC51RC+/8XC51RD+ For applications requiring 4K ROM/EPROM, see the 8.

requiring 4K ROM/EPROM, see the 8XC51/80C31 8-bit CMOS (low voltage, low power, and high speed) microcontroller families.

Three different Single-Chip 8-Bit Microcontroller families are presented in this datasheet: FEATURES
* 80C32/8XC52/8XC54/8XC58
* 80C51FA/8XC51FA/8XC51FB/8XC51FC
* 80C51RA+/8XC51RA+/8XC51RB+/8XC51RC+/8XC51RD+ For applications requiring 4.

87C51

87C51FA

87C51FB

87C51FC

87C51FC-20

87C51GB

87C51SL

87C51X2

87C52

87C524

87C528

87C52X2

87C54