Hitachi (HM) - 16 Megabit


HM51W17400BS6
^^^---------------- HM5 = Hitachi Memory
HM51W17400BS6
    ^-------------- W = 3,3volt / (blank) = 5volt
HM51W17400BS6
     ^------------- 1 = 16 Megabit chip
                    4 = 4  Megabit chip
HM51W17400BS6
      ^------------ 8 = 1K refresh
                    7 = 2K refresh
                    6 = 4K refresh
HM51W17400BS6
       ^^---------- Internal Organization: 
                    10 = 16Meg x 1
                    16 = 1Meg x 16
                    40 = 4Meg x 4
                    80 = 2Meg x 8
HM51W17400BS6
         ^--------- 0 = Fast Page
                    5 = EDO
HM51W17400BS6
            ^------ Speed: 5=50ns / 6=60ns / 7=70ns