> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Brian Padalino > Sent: Monday, October 01, 2007 5:53 PM > To: Matt Ettus > Cc: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] Default FPGA I/O standard > > On 10/1/07, Matt Ettus <[EMAIL PROTECTED]> wrote: > > I think 3.3V LVTTL and LVCMOS are really the same. > > > > Matt > > According to this: > > http://www.interfacebus.com/voltage_LV_threshold.html > > They are, indeed, basically the same. > > Brian
They're the same only different. For most purposes, the differences don't matter too much. The biggest difference is in the output drive capability. LVTTL outputs are required to be able to source/sink 2mA while remaining compliant while LVCMOS outputs are only required to source/sink 100uA. For those interested in the "official" word, refer to the actual JEDEC standard: http://www.jedec.org/download/search/jesd8c.pdf _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
