What DIP package to use?

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jgrant3

Joined: 24 Jul 2008
Posts: 11

28 Aug 2008 17:49 What DIP package to use?

Hello.

I may have posted this in the incorrect forum so apologies if this is so.

I'd like to canvas people's opinions on what DIP package is best to use. My CMOS IC will be 5 mm of 5 mm in size onto which I will have some basic microfluidics. I plan on using a DIP package for this chip and was thinking of the side brazed variety. Does this architecture sound good?

Also I'll have several chips to work with so I want to adopt a plug and play approach when it comes to mounting the DIP package to my PCB. I'm thinking of using a Zero-Insertion-Force (ZIP) socket. Again I ask is this a good idea?

Does anyone have any good guides to packaging of chips, interfacing chips with PCBs etc?

Thanks,

James

electronrancher

Joined: 24 Mar 2002
Posts: 474
Helped: 34

28 Aug 2008 21:42 What DIP package to use?

Sidebrazed ceramic DIP is fine - tell them not to solder the lid on so you can get access to the die. They can tape the lid on.

ZIF is OK, but the more connectors, etc that you put between the IC and the external circuit the more capacitance and parasitic inductance you have. ZIF would be fine for DC signals or low-frequency (<1MHZ) but if you have high-frequency clocks or high-frequency analog you may just want to solder each IC to the board.

It's easier to make 20 hardwired boards than it is to spend weeks debugging a fake noise problem.

This place can advise you on ceramic DIP assembly, as well as give you the blank bond diagrams for you to draw your bondout diagram.

http://www.promex-ind.com/index_files/PromexCeramicPackageICAssembly.htm

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