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Technology Stocks : Altera
ALTR 53.61+1.3%Jul 7 5:00 PM EST
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To: Sylvia Dupuis who wrote (2028)4/29/1999 5:58:00 PM
From: Lewis M. Carroll  Read Replies (1) of 2389
 
Sylvia, your comment on big CPLDs has a basic problem. At the heart of a CPLD is a somewhat less than 100% populated crosspoint switch. Different people have different ways of implementing the switch but it is still a switch. It's nature is that it grows exponentially in complexity with the number of inputs. This means it sucks up die area and power. Macrocell-based products above about 200 macrocells are inefficient power-hungry expensive beasts. You can match performance for most applications at that level with a 6KA or SpartanXL device. People still use them though because they are afraid of FPGAs or think they need instant-on.

What kind of performance exactly do you think a 30K gate CPLD (which translates to about 1000 macrocells) can provide that is unheard of in FPGAs? Last I checked, Virtex could do damn near 200 MHz. Show me a CPLD that comes close at that density and doesn't consume KW of power.
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