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GL640 датащи(PDF) 36 Page - List of Unclassifed Manufacturers |
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GL640 датащи(HTML) 36 Page - List of Unclassifed Manufacturers |
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36 / 39 page ![]() Revision 1.1 Jun. 7, 1999 -35- GL640USB, GL640USB-A 11.4 Switching Characteristics SYMBOL Description MIN TYP MAX UNIT FX1 X1 crystal frequency 11.97 12 12.03 MHz TCYC X1 cycle time 83.3 ns TX1L X1 clock LOW time 0.45Tcyc ns TX1H X1 clock HIGH time 0.45Tcyc ns Tr30pf Output pad rise time from 10% to 90% swing with 30pF loading 6 8 12 ns Tf30pf Output pad fall time from 10% to 90% swing with 30pF loading 5.3 7 10.4 ns Tr50pf Output pad rise time from 10% to 90% swing with50pF loading 9.5 13 19 ns Tf50pf Output pad fall time from 10% to 90% swing with 50pF loading 7.7 10 16 ns TrUSB D+/D- rise time with 50pF loading 4 20 ns TfUSB D+/D- fall time with 50pF loading 4 20 ns |
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