[time-freq] Which CPLD work with the Reflock II?

[Luis Cupido]

Hi Michael,

Any cpld EPM1270T144* will fit and will work fine.
the faster C3 version will work up to an higher frequency
(above 200MHz) while the C5 may not reach 200MHz
typical something like 150MHz.
So if your application is for a 10MHz GPS project I would
say that even a C7 would do the job equally well.

So depending on your specific needs you decide what
speed grade is enough for you.

Luis Cupido
ct1dmk.



----- Original Message ----- 
From: "michael taylor" <mctylr at gmail.com>
To: <time-freq at lists.tapr.org>
Sent: Wednesday, October 11, 2006 9:36 PM
Subject: [time-freq] Which CPLD work with the Reflock II?


>I realise this is a basic question, but I cannot seem to find which
> Altera MAX II 1270 CPLD model works with the Reflock II.
> 
> In the photo on the TAPR site the unit uses a EPM1270T144C5 with 10.1
> nS Delay time tpd(1) max), but I see that there is also an
> EPM1270T144C3 device with 6.3 nS Delay time tpd(1) max.
> 
> Would the "faster" part work, and would it be worth using (the faster
> one costs about $60 Cdn versus $30 Cdn)?
> 
> Thanks,
> Michael VE3TIX
> 
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