8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONT.
Intel
N87C251SP - (N87C251SA/SB/SP/SQ) High Performance CHMOS Microcontroller
8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER J Real Time and Programmed Wait State Bus Operation Binary-code Compatible with MCS® 51 J J.