1. Home
  2. Field-Programmable Gate Arrays
  3. Xilinx Package/Logic Options

Xilinx Package/Logic Options

Hello:

This is a question/comment for the Xilinx people here. Is there a technical (or Marketing) reason that there are not more FPGA's that have lots of logic and RAM resources in a very small package. FOr example an XC3S1500 in a VQ100 or VQ44? I have applications which I need very few I/O but need lots of logic. For example, a CPU that streams A/D data in serially and spits data back out serailly.

Also, BRING BACK Ceramic PGA! I understand its an expensive package, but with the high cost of FPGAs, I would rather pay the money to have easier PCB and hand assembly. I love FPGAs work but hate working with BGA's. Its expensive to protoype with. It would nice to lots more logic and RAM in the QFP packages!

-Eli

Reply to
Eli Hughes
Loading thread data ...

"Eli Hughes" schrieb im Newsbeitrag news:dknncg$1ik2$ snipped-for-privacy@f04n12.cac.psu.edu...

possible the FPGA vendors see no interest in that. pitty.

I would really welcome some FPGA in QFN40, with onchip USB and etherner PHY :)

but the FPGAs in small packages are rather small. The best small is possible s3e-500 in CP132 8b8 mm

for ceramic packages i bet the times are over forever.

Antti

Reply to
Antti Lukats

BGA packages are FAR easier to deal with in automated reflow for a number of reasons. BGAs are also the smallest footprint/connection technology around, which is important to a lot of people. Another thread was noting that to get high levels of logic usually entails getting a lot of pins as well.

I understand the desire for non-BGA versions (There's been a number of times I wished for it), but the commercial market probably won't sustain it in very high pin count packages.

Cheers

PeteS

Reply to
PeteS

What are military/space people using these days? (I thought that was the reason for ceramic packages in the old days.)

-- The suespammers.org mail server is located in California. So are all my other mailboxes. Please do not send unsolicited bulk e-mail or unsolicited commercial e-mail to my suespammers.org address or any of my other addresses. These are my opinions, not necessarily my employer's. I hate spam.

Reply to
Hal Murray

The last space project I was on (earlier this year) was to use a Virtex2 in a ceramic column grid array. It's basically a ceramic BGA with solder columns instead of balls. I believe the reasoning behind the columns is that they will allow more differential thermal expansion before the stress pops the part off the board. It is still a ceramic package, but not in a form factor that is any easier for a hobbyist to use than a bga package, and it is a heck of a lot more expensive.

--
--Ray Andraka, P.E.
President, the Andraka Consulting Group, Inc.
401/884-7930     Fax 401/884-7950
email ray@andraka.com  
http://www.andraka.com  

 "They that give up essential liberty to obtain a little 
  temporary safety deserve neither liberty nor safety."
                                          -Benjamin Franklin, 1759
Reply to
Ray Andraka

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.