Common and Uncommon RAM for PCBs

[AskJacob]

Hi people,

 

I am looking at ordering a selection of RAM for repairs.

 

I was wondering if anyone has any input to some types of RAM it is worth getting, and perhaps also rare types to keep an eye out for.

 

Is there already a resource like this?

 

Cheers

 

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Here are some I have so far:

 

2016

2018

2101

2114 - 1k x 4

4116

41256

4164

5101

6264 - 8k x 8

62256

 

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Edited August 14, 2008 by AskJacob

[Ric]

these guys have a great range

 

http://www.arcadechips.com

 

the dollar makes it a pain atm

[hamish_nz]

arcadechips is in trouble (bad rep) which is a shame as I never had issues with them.

 

coinopchips.com is the new kid on the block, Ive ordered from him (very good)

[AskJacob]

I can pick up some of the ram listed here from futurlec.com.au - some people don't like the fact they are based overseas, but I have had no problems with the past 3 years os so I have dealt with them...

 

Cheers

[hamish_nz]

+1

 

put in an order with them last week

[Womble]

Unicorn electronics is the source for me.

 

Unfortunatley its hard to know what ram types you will come across until you start working on boards. If you are lucky you will end up with a lot of scrap not-worth-fixing boards, I find that most ram types I need are to be found on those. Also if everytime you buy RAM you buy at least 25 chips you will end up with a useful stock.

 

It also depends on what vintage of boards you intend to work on, early 80s boards use different ram chips from the later 80s/90s boards.

[Johns-Arcade]

Some common RAM you should have is:

 

2114, used in LOTS of pcb's.

4116 for older Williams stuff.

5101 used as memory back up in older pins and some vids. (Make sure you get the low power version)

And maybe some 2101.

 

Most of the other RAM used I wouldn't stock if you don't have a large board collection or repair many boards.

 

Mind you, this is mainly for older pcb's.

 

Regards,

 

Johns-Arcade.

[AskJacob]

Thanks mate.

 

Added them to the list...

 

Not looking to stockpile as such, just things to keep an eye out for when I'm stripping boards or ordering something.

 

Cheers

[Womble]

2016/2018s are very very commonly found on boards I seems to come across.

[AskJacob]

Thanks mate, added them too.

 

Cheers

[dj10555]

Also check the speed of the ram you need. Some sites don't mention it, and sell the slower ram which may be no good in certain boards.