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Link naar de fabrikant. Link to the manufacturer.

Sample	Explanation
	16 Mb Chip organised as: 4M x 4 bits 2K refresh, Extended Data Out (EDO) Speed = 60ns, Supply = 3.3 Volt

Hitachi (HM) - 4 Megabit

HM51W4265CJ6
^^^---------------- HM5 = Hitachi Memory
HM51W4265CJ6
    ^-------------- W = 3,3volt / (blank) = 5volt
HM51W4265CJ6
     ^------------- 1 = 16 Megabit chip: Click here
                    4 = 4  Megabit chip
HM51W4265CJ6
      ^------------ 2 = 512 refresh
                    4 = 1K refresh
                    8 = 1K refresh
HM51W4265CJ6
      ^^----------- Internal Organization: 
                    26 = 256K x 16: check module size/banks
                    40 = 1Meg x 4 : check module size/banks
                    80 = 512K x 8 : check module size/banks
HM51W4265CJ6
        ^---------- 0 = Fast Page
                    5 = EDO
HM51W4265CJ6
           ^------- Snelheid: 5=50ns / 6=60ns / 7=70ns

Hitachi (HM) - 16 Megabit

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