EP2S90F1020C4N Datasheet, PDF (196/238 Pages) Altera Corporation – The Stratix II family offers the following features

Timing Model
Table 5–75. Stratix II I/O Output Delay for Column Pins (Part 4 of 8)
I/O Standard
Drive
Strength
Parameter
SSTL-18
Class I
SSTL-18
Class II
1.8-V HSTL
Class I
4 mA
t_{O P}
t_{D I P}
6 mA
t_{O P}
t_{D I P}
8 mA
t_{O P}
t_{D I P}
10 mA t_{O P}
t_{D I P}
12 mA t_{O P}
(1)
t_{D I P}
8 mA
t_{O P}
t_{D I P}
16 mA t_{O P}
t_{D I P}
18 mA t_{O P}
t_{D I P}
20 mA t_{O P}
(1)
t_{D I P}
4 mA
t_{O P}
t_{D I P}
6 mA
t_{O P}
t_{D I P}
8 mA
t_{O P}
t_{D I P}
10 mA t_{O P}
t_{D I P}
12 mA t_{O P}
(1)
t_{D I P}
Minimum Timing
Industrial Commercial
-3
Speed
Grade
(3)
-3
Speed
Grade
(4)
-4
Speed
Grade
-5
Speed
Grade
Unit
909
953
1690 1773 1942 2012 ps
929
975
1756 1843 2018 2102 ps
914
958
1656 1737 1903 1973 ps
934
980
1722 1807 1979 2063 ps
894
937
1640 1721 1885 1954 ps
914
959
1706 1791 1961 2044 ps
898
942
1638 1718 1882 1952 ps
918
964
1704 1788 1958 2042 ps
891
936
1626 1706 1869 1938 ps
911
958
1692 1776 1945 2028 ps
883
925
1597 1675 1835 1904 ps
903
947
1663 1745 1911 1994 ps
894
937
1578 1655 1813 1882 ps
914
959
1644 1725 1889 1972 ps
890
933
1585 1663 1821 1890 ps
910
955
1651 1733 1897 1980 ps
890
933
1583 1661 1819 1888 ps
910
955
1649 1731 1895 1978 ps
912
956
1608 1687 1848 1943 ps
932
978
1674 1757 1924 2033 ps
917
962
1595 1673 1833 1928 ps
937
984
1661 1743 1909 2018 ps
896
940
1586 1664 1823 1917 ps
916
962
1652 1734 1899 2007 ps
900
944
1591 1669 1828 1923 ps
920
966
1657 1739 1904 2013 ps
892
936
1585 1663 1821 1916 ps
912
958
1651 1733 1897 2006 ps
5–60
Stratix II Device Handbook, Volume 1
Altera Corporation
April 2011