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DS681 Datasheet, PDF (33/56 Pages) Xilinx, Inc – Fast look-ahead carry logic
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Table 28: Recommended Number of Simultaneously
Switching Outputs per VCCO-GND Pair
(VCCAUX=3.3V)(Continued)
Package Type
FTG256, FGG400, FGG484
Signal Standard
(IOSTANDARD)
Top, Bottom
(Banks 0,2)
Left, Right
(Banks 1,3)
LVCMOS25 Slow
2
76
76
4
46
46
6
33
33
8
24
24
12
18
18
16
–
11
24
–
7
Fast
2
18
18
4
14
14
6
6
6
8
6
6
12
3
3
16
–
3
24
–
2
QuietIO 2
76
76
4
60
60
6
48
48
8
36
36
12
36
36
16
–
36
24
–
8
LVCMOS18 Slow
2
64
64
4
34
34
6
22
22
8
18
18
12
–
13
16
–
10
Fast
2
18
18
4
9
9
6
7
7
8
4
4
12
–
4
16
–
3
QuietIO 2
64
64
4
64
64
6
48
48
8
36
36
12
–
36
16
–
24
Table 28: Recommended Number of Simultaneously
Switching Outputs per VCCO-GND Pair
(VCCAUX=3.3V)(Continued)
Package Type
FTG256, FGG400, FGG484
Signal Standard
(IOSTANDARD)
Top, Bottom
(Banks 0,2)
Left, Right
(Banks 1,3)
LVCMOS15 Slow
2
55
55
4
31
31
6
18
18
8
–
15
12
–
10
Fast
2
25
25
4
10
10
6
6
6
8
–
4
12
–
3
QuietIO 2
70
70
4
40
40
6
31
31
8
–
31
12
–
20
LVCMOS12 Slow
2
40
40
4
–
25
6
–
18
Fast
2
31
31
4
–
13
6
–
9
QuietIO 2
55
55
4
–
36
6
–
36
PCI33_3
16
16
HSTL_I
–
20
HSTL_III
–
8
HSTL_I_18
17
17
HSTL_II_18
–
5
HSTL_III_18
10
8
SSTL18_I
7
15
SSTL18_II
–
9
SSTL2_I
18
18
SSTL2_II
–
9
SSTL3_I
8
10
SSTL3_II
6
7
DS681 (v1.1) February 3, 2009
www.xilinx.com
33
Product Specification
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