Cyclone IV price point?

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Historically, how long would it take for a new Altera FPGA to be widely available from the time it is released?

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Time from anouncement to time of delivery is varying, I suppose it depends on what the competition is doing. I think Cyclone IV was a quite early announcement because of Spartan VI.

However, from my experience Altera was always pretty good in meeting the announced schedule. I would not dare to say this about Xilinx. Of course, new parts are always a little bit of risk and you should have close contact with a FAE and order early.