[hpsdr] [OZY] QFP or BGA?

[KD5NWA]

Have oven, will solder.

There is no need to fear, Toasty oven is here.


< http://www.qrpradio.com/pub/Ham/SDR/SMT/SMT.html >


At 10:40 AM 5/11/2006, you wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>I'd vote YES.
>
>I just verified with a reliable source in the packaging / circuit 
>assembly field. It is economical to deal with BGA.
>Higher density for smaller size. If you're worried about 
>reliability, the bigger problem is the QFN.
>
>My source got a chuckle out of the "toaster oven and solder paste" 
>comment. So don't fear the BGA. Go for the extra I/O lines, you can 
>never have too many I/O lines.
>
>I can deal with populating the OZY alpha boards.
>
>Alex, N3NP
>
>----- Original Message ----
>From: Philip Covington <p.covington at gmail.com>
>To: HPSDR List <hpsdr at hpsdr.org>
>Sent: Thursday, May 11, 2006 10:42:37 AM
>Subject: [hpsdr] [OZY] QFP or BGA?
>
>***** High Performance Software Defined Radio Discussion List *****
>
>Hi group,
>
>Let's have a yes/no vote on using BGAs in the HPSDR project.
>
>---------------------------------------------------------------------------------------------
>Why:
>---------------------------------------------------------------------------------------------
>I intend to use the Cyclone II EP2C5 on the OZY board.  I am running
>out of I/O pins with the QFP208 part unless I disconnect some of the
>FX2 lines from the FPGA.
>
>The QFP208 package (in the current OZY schematic) gives me around 142
>I/O.  If we bumped up to the BGA256 package it looks like I get around
>158 I/O lines (16 more).
>
>The QFP208 package EP2C5Q208C8 is $13.90/qty 1 Digikey
>
>The BGA256 EP2C5F256C8 is $14.90/qty 1 Digikey
>
>Another alternative is the EP2C8 part with more LE/RAM/ETC...:
>
>EP2C8Q208C8 in QFP208 with 138 I/O is $20.30/qty 1 Digikey <-less I/O,
>not a real choice>
>
>EP2C8F256C8 is BGA256 with 182 I/O is $23.50/qty 1 Digikey
>
>73 de Phil N8VB
>
>P.S. Eventually we will have to deal with the BGA/CSP/QFN packages.
>The LTC2208, for example, only comes in the 64 lead QFN package.
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Cecil Bayona
KD5NWA
www.qrpradio.com

"Windows, the most successful software virus ever" Don Seglio Batuna 



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