preferably in a dip package is there an eight pin pone,, only thing i can find is like 40pin soic
anyway i am finishing up the idea that i started about the computer ram as a delay module. thanks to peter Snowberg for the original breakdown.
also if you have anything to add please do, as you were the brainCHild of this idea
i am using a tc514256dram
What bit width are you looking for? I would recommend looking for something about 12 bits wide.
Things are getting pretty small these days, but Surfboards (http://www.capitaladvanced.com/) make it easy to use a singe SOIC chip when the rest of your circuit is all DIP and you're using perf. I don't know if they have an adapter for the chip you're looking at, but they have a bunch.
in DIP land, the LTC1450 has a 12 bit parallel input and it comes in a 24 pin PDIP package. For a 12 bit A/D on the other side, something like the LTC1272. It has built in sample and hold, takes a single +5 supply (bias your input to 2.5V), and is pretty easy to use.
Now the DRAM on the other hand.... that stuff is a serious pain to use unless you have a DRAM controller which usually means a gate array or a fast microcontroller and some programming. I would suggest using an SRAM because you can get 2 meg SRAMs these days in a single package and you don't have to deal with any kind of refresh circuits. The absolute easiest memory chips to use are FIFOs which is short for First-In-First-Out. They work like digital BBDs, but they're expensive on a per-bit basis. There are not many FIFOs these days, but I think they're still made by TI, Cypress Semiconductor, and OKI for a couple of sources. The great thing about FIFOs is that you don't need any address generation logic to make them work as delays.
Take care,
-Peter
ahh ok.. well i was lookin at that on the net, seeing as i do not know jack about ram and such, lol so much appreciated for that.
afar as converters i dont' rem which ones i already have, i do however have the 12bit one as you suggested, i ordered a few of them a while back, and got them in recnetly. i guess i will have to find some Sram.
and get me a 12bit d to a.
thank you peter
also just checked out the surfboards.. hmmmm very interesting, was wodnering what it was called when you do stuff like that, very handy indeed