"Manfred Balik" <manfred.balik@tuwien.ac.at> wrote in message 
news:436f32f9$0$11868$3b214f66@tunews.univie.ac.at...
>I want to use an Altera CPLD to do the interface between an ISA-Bus and a 
>Cyclone II-FPGA.
> The CPLD should satisfy the criteria of the ISA-Bus timing to 
> enable/disable the FPGA and do the level-conversion between the 5V 
> ISA-Bus-levels and the logic levels of the FPGA (3,3V or 2,5V or 1,8V).
>
> I found this Altera CPLDs:
> MAX II doesn't support 5V I/Os
> MAX 3000A
> MAX 7000B doesn't support 5V I/Os
> MAX 7000AE
> MAX 7000S
> What is the main difference between this 3 remaining CPLDs?
> Is one of them a mature device?
> Which Altera CPLD should I use, I'm unfortunately not so familiar with 
> CPLDs.
>

I would recommend the MAX 3000A as it is 3.3V with 5V tolerant
I/O and will interface to the Cyclone II using 3.3V I/O levels.
The MAX 7000AE will also work (3.3V with 5V tolerance) but
is more expensive.  The MAX7000S is an older 5V family
(cannot interface directly to the Cyclone II).

Daniel Lang

I want to use an Altera CPLD to do the interface between an ISA-Bus and a 
Cyclone II-FPGA.
The CPLD should satisfy the criteria of the ISA-Bus timing to enable/disable 
the FPGA and do the level-conversion between the 5V ISA-Bus-levels and the 
logic levels of the FPGA (3,3V or 2,5V or 1,8V).

I found this Altera CPLDs:
MAX II doesn't support 5V I/Os
MAX 3000A
MAX 7000B doesn't support 5V I/Os
MAX 7000AE
MAX 7000S
What is the main difference between this 3 remaining CPLDs?
Is one of them a mature device?
Which Altera CPLD should I use, I'm unfortunately not so familiar with 
CPLDs.

Thanks for help, Manfred