Re: CPLDs/FPGAs toolchain

From: Jim Brain <>
Date: Mon, 25 Apr 2016 09:08:17 -0500
Message-ID: <>
On 4/25/2016 7:41 AM, Hegedűs István wrote:
> XC9500XL devices are 5V tolerant and pins can be configured for LVTTL. 
> As output the LVTTL levels are enough to drive 5V logic TTL devices 
> while the input of the CPLD is 5v tolerant. It can be used for the old 
> 8 bit projects just make sure the CPLD gets proper Vcc (3.3v).
> Istvan
I regularly use XL devices (144 and 72 macrocell devices, but my point 
was that the non XL products are no longer produced.  As others have 
noted, sources like utsource and a few others allow me to procure those 
5V products, but they are climbing in price and there is a dwindling supply.


> *From:* Jim Brain <>
> *Sent:* Friday, April 22, 2016 11:07 PM
> *To:* Michał Pleban <> ; 
> <>
> *Subject:* Re: CPLDs/FPGAs toolchain
> Well, I know Xilinx has 5V tolerant parts still in production, but I 
> don't think either offer 5V logic anymore.
> jim
>> On April 22, 2016 at 4:22 PM Michał Pleban <> wrote:
>> Hello!
>> wrote:
>>> What do you guys use for developing your CPLDs and FPGAs? Do you use 
>>> the supplier provided tools or some free / GNU positions worth 
>>> having a closer look at?
>> I am working with Atmel CPLDs so I use their WinCUPL software which is
>> free. However, I am getting more and more tired of the bugs in it so I
>> am contemplating switching to Xilinx or Altera if they still have 5V
>> parts available.
>> Regards,
>> Michau.
>> Message was sent through the cbm-hackers mailing list
> Message was sent through the cbm-hackers mailing list

Jim Brain

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Received on 2016-04-25 15:00:02

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