87C51/80C51BH/80C31BH CHMOS SINGLE-CHIP 8-BIT MICR.
Intel
TP87C51 - (TP8xCx1BH) CMOS Single-Chip 8-Bit Microcontroller
87C51/80C51BH/80C31BH CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER Commercial/Express 87C51/80C51BH/80C51BHP/80C31BH *See Table 1 for Proliferation Options.