4 194 304 BY 4-BIT/2 097 152 BY 8-BIT/1 048 576 BY 16-BIT BY 4-BANK SYNCHRONOUS DYNAMIC RANDOM-ACCESS MEMORIES4 194 304 4 - BIT / 2 097 152 ×8位/ 1 048 576 ×16位× 4 -BANK同步动态随机存取存储器