DS681 Datasheet, PDF (32/56 Pages) Xilinx, Inc – Fast look-ahead carry logic

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Table 28: Recommended Number of Simultaneously
Switching Outputs per V_CCO-GND Pair
(V_CCAUX=3.3V)
Package Type
FTG256, FGG400, FGG484
Signal Standard
(IOSTANDARD)
Top, Bottom
(Banks 0,2)
Left, Right
(Banks 1,3)
Single-Ended Standards
LVTTL
Slow
2
60
60
4
41
41
6
29
29
8
22
22
12
13
13
16
11
11
24
9
9
Fast
2
10
10
4
6
6
6
5
5
8
3
3
12
3
3
16
3
3
24
2
2
QuietIO 2
80
80
4
48
48
6
36
36
8
27
27
12
16
16
16
13
13
24
12
12
Table 28: Recommended Number of Simultaneously
Switching Outputs per V_CCO-GND Pair
(V_CCAUX=3.3V)(Continued)
Package Type
FTG256, FGG400, FGG484
Signal Standard
(IOSTANDARD)
Top, Bottom
(Banks 0,2)
Left, Right
(Banks 1,3)
LVCMOS33 Slow
2
76
76
4
46
46
6
27
27
8
20
20
12
13
13
16
10
10
24
–
9
Fast
2
10
10
4
8
8
6
5
5
8
4
4
12
4
4
16
2
2
24
–
2
QuietIO 2
76
76
4
46
46
6
32
32
8
26
26
12
18
18
16
14
14
24
–
10
32
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DS681 (v1.1) February 3, 2009
Product Specification