IC UPD23C128080BLGY-xxx-MJH 型号UPD23C128080BLGY-xxx-MJH 厂商 NEC 产品描述 128M-BIT MASK-PROGRAMMABLE ROM 16M-WORD BY 8-BIT (BYTE MODE) / 8M-WORD BY 16-BIT (WORD MODE) PAGE ACCESS MODE