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Adapter to replace SRAM, 18 - 28 pin Pdip

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    Adapter to replace SRAM, 18 - 28 pin Pdip

    I have been designing adapters for the now very hard to get and ever failing SRAM chips such as the 2114, 2148, 2015, 2016, 2018, 6116, 6264, cy7c185, 8464, 2063 etc and I received the first of my test board back and I am very happy with how its turned out. The boards will be a piggy back design with a top board having the new 256kb SRAM installed on it and then a selection of bottom boards for the different pin out configurations which will map the pins to the required locations.

    I put the 24pin socket next to the board to show the size, and the board is also sitting over the pins of another 24pin socket which is upside down to show that the holes line up perfectly. There is a socket on the base board and there will be a plug on the top board. I have pushed a plug into this socket though to test the connectivity and height, and there is no way its coming out now! When the two board are connected together, there is about a 2-3mm so the entire stack should end up being no taller than a normal dip socket with a chip installed.

    24pinbaseboard.jpg
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    #2
    Here is the cad images of the top board and the 18pin base board for the 2114 / 2148.

    TopBoardangled.png 1024x4angled.png
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      #3
      I have just sent the 18 and 24 pin base boards off for the first small run of 100 of each. Just trying to finalise the top board so that I can send it off as well. All going well I will have some of these ready in about 2 weeks time.
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        #4
        I have 10,000 cy7c185
        Australian Distributors for Planetary Pinball, Chicago Gaming, American Pinball.
        Your one Stop Shop For New Pinball & Arcade Games.

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          #5
          Originally posted by Ballypinball View Post
          I have 10,000 cy7c185
          In what package?
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            #6
            normal dip same as original all Williams NOS stock
            Australian Distributors for Planetary Pinball, Chicago Gaming, American Pinball.
            Your one Stop Shop For New Pinball & Arcade Games.

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              #7
              Exactly why I asked. They are PDIP 28 and not 18 or 24pin 1k, 2k, 8k or 16k chips which is why I am making these adapters
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                #8
                Although not the final product, here is what the boards will look like in regards to the size. The connectors I have used are really quite amazing. Im really impressed with how well they connect and how much force is required to pull them apart.

                length.png sideview.png width.png
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                  #9
                  Added 24 pin 600 mil (wide) adapter boards.

                  24pinwbottom.png 24pinwtop.png
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                    #10
                    Juts received a number of the boards I have been making... Like a kid in a candy store.

                    Left to right: Konami 054544 module, Konami 054986A (messed these up so they will be going straight in the bin), front right 24pin narrow SRAM base boards, rear right 18pin SRAM base boards.

                    unbocking.png
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