AT87C51RB2-SLSUL
AT87C51RB2-SLSUM
AT87C51RB2TUL
AT87C51RB2TUM
AT87C51RC2-3CSUL
AT87C51RC2-3CSUM
AT87C51RC2-RLTUL
AT87C51RC2-RLTUM
AT87C51RC2-SLSUL
AT87C51RC2-SLSUM