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Understanding RAM chip numbers: Alliance

Link naar de fabrikant. Link to the manufacturer.

Sample Explanation

 16 Mb Chip organised as: 1M x 16 bits
?K refresh, Extended Data Out (EDO)
Speed = 60ns, Supply = 5 Volt

Alliance (AS) - 4 Megabit

How do I read the type number?

AS4C14405-60JC
^^----------------- AS = Alliance
AS4C14405-60JC
  ^---------------- 4 = DRAM
AS4C14405-60JC
   ^--------------- C = 5volt
AS4C14405-60JC
      ^------------ 6 = 4K refresh
                    7 = 2K refresh
                    8 = 1K refresh
AS4C14405-60JC
      ^^----------- Internal Organization: 
                    40 = 1Meg x 4 : check module size/banks
AS4C14405-60JC
        ^---------- 0 = Fast Page
                    5 = EDO
AS4C14405-60JC
          ^^------- Speed: 50=50ns / 60=60ns / 70=70ns / etc

 

Alliance (AS) - 4/16 Megabit

How do I read the type number?

AS4C1M16E5-60JC
^^----------------- AS = Alliance
AS4C1M16E5-60JC
  ^---------------- 4 = DRAM
AS4C1M16E5-60JC
   ^--------------- C = 5volt
AS4C1M16E5-60JC
      ^------------ 6 = 4K refresh
                    7 = 2K refresh
                    8 = 1K refresh
AS4C1M16E5-60JC
    ^^^^----------- Internal Organization: 
                    256K16 = 256K x 16: check module size/banks
                    1M16   = 1Meg x 16: check module size/banks
AS4C1M16E5-60JC
        ^---------- F = Fast Page
                    E = EDO
AS4C1M16E5-60JC
           ^^------ Speed: 50=50ns / 60=60ns / 70=70ns / etc