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AT40K Datasheet(PDF) 27 Page - ATMEL Corporation |
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AT40K Datasheet(HTML) 27 Page - ATMEL Corporation |
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27 / 67 page  27 AT40K/AT40KLV Series FPGA 0896C–FPGA–04/02 AC Timing Characteristics – 5V Operation AT40K Delays are based on fixed loads and are described in the notes. Maximum times based on worst case: VCC = 4.75V, temperature = 70°C Minimum times based on best case: VCC = 5.25V, temperature = 0°C Maximum delays are the average of tPDLH and tPDHL. Clocks and Reset Input buffers are measured from a V IH of 1.5V at the input pad to the internal VIH of 50% of VCC. Maximum times for clock input buffers and internal drivers are measured for rising edge delays only. Cell Function Parameter Path Device -2 Units Notes Global Clocks and Set/Reset GCLK Input Buffer t PD (Maximum) pad -> clock pad -> clock pad -> clock pad -> clock AT40K05 AT40K10 AT40K20 AT40K40 1.1 1.2 1.2 1.4 ns ns ns ns Rising edge clock FCLK Input Buffer t PD (Maximum) pad -> clock pad -> clock pad -> clock pad -> clock AT40K05 AT40K10 AT40K20 AT40K40 0.7 0.8 0.8 0.8 ns ns ns ns Rising edge clock Clock Column Driver tPD (Maximum) clock -> colclk clock -> colclk clock -> colclk clock -> colclk AT40K05 AT40K10 AT40K20 AT40K40 0.8 0.9 1.0 1.1 ns ns ns ns Rising edge clock Clock Sector Driver t PD (Maximum) colclk -> secclk colclk -> secclk colclk -> secclk colclk -> secclk AT40K05 AT40K10 AT40K20 AT40K40 0.5 0.5 0.5 0.5 ns ns ns ns Rising edge clock GSRN Input Buffer tPD (Maximum) pad -> GSRN pad -> GSRN pad -> GSRN pad -> GSRN AT40K05 AT40K10 AT40K20 AT40K40 3.0 3.7 4.3 5.6 ns ns ns ns From any pad to Global Set/Reset network Global Clock to Output tPD (Maximum) clock pad -> out clock pad -> out clock pad -> out clock pad -> out AT40K05 AT40K10 AT40K20 AT40K40 8.3 8.4 8.6 8.8 ns ns ns ns Rising edge clock Fully loaded clock tree Rising edge DFF 20 mA output buffer 50 pf pin load Fast Clock to Output t PD (Maximum) clock pad -> out clock pad -> out clock pad -> out clock pad -> out AT40K05 AT40K10 AT40K20 AT40K40 7.9 8.0 8.1 8.3 ns ns ns ns Rising edge clock Fully loaded clock tree Rising edge DFF 20 mA output buffer 50 pf pin load |
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