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Jim Granville
08/02/12 15:09
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#187987 - Wide Vcc CPLDs sadly rare
Responding to: Richard Erlacher's previous message
Richard Erlacher said:
Perhaps certain CPLD's would do the job

It is an obvious capability that they SHOULD have, but sadly, CPLD vendors are glacial in joining Microcontrollers in Wide Vcc operation.

The newest 1.8V core CPLD's either limit to 3.3V max, or they have many caveats on what are 'somewhat 5V tolerant' outputs.
NONE will formally specify an ability to drive to 5V on one side, from a 1.8V input on the other.

Best devices for this are the Dual-Rail Voltage Translators, as you can properly drive push-pull with those.

List of 13 messages in thread
CPLD level translators      Mahmood Elnasser      05/15/12 03:42      
   TI Voltage level translators ?        Jim Granville      05/15/12 05:27      
      thanks      Mahmood Elnasser      05/16/12 01:03      
      Why specifically CPLD?      Andy Neil      05/16/12 15:17      
         True      Mahmood Elnasser      05/16/12 22:45      
            Perhaps certain CPLD's would do the job      Richard Erlacher      08/01/12 16:14      
               Wide Vcc CPLDs sadly rare      Jim Granville      08/02/12 15:09      
                  forgive my ignorance, but ...      Richard Erlacher      08/02/12 17:54      
                      some examples      Jim Granville      08/03/12 15:11      
                        Same for ARM      Per Westermark      08/03/12 18:56      
                           some small devices have OCR too      Jim Granville      08/03/12 23:14      
                              Bigger chips      Per Westermark      08/04/12 05:59      
            Altera FPGAs        Oliver Sedlacek      08/06/12 04:07      

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