Nxp 8 bit cmos microcontrollers nxp 87c52ebpn the 87c52 is a high performance static 80c51 design fabricated with high density cmos technology with operation from 27 v to 55 vcontains a 256 x 8 ram 32x io lines three 16 bit countertimers a six source four priority level nested interrupt structure a serial io port for either multi processor communications io expansion or full duplex uart and on chip oscillator and clock circuitsin addition the device is a low power static desig