DATA SHEET MOS INTEGRATED CIRCUIT µPD17230,1723.
NEC
UPD17233 - 4-BIT SINGLE-CHIP MICROCONTROLLER
DATA SHEET MOS INTEGRATED CIRCUIT µPD17230,17231,17232,17233,17234,17235,17236 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED .