XC3S50A-4TQG144C Datasheet, PDF (40/132 Pages) Xilinx, Inc – Spartan-3A FPGA Family

DC and Switching Characteristics
Table 29: Recommended Number of Simultaneously Switching
Outputs per VCCO-GND Pair (V_CCAUX=3.3V)(Continued)
Package Type
FT256, FG320,
FG400, FG484,
VQ100, TQ144
FG676
Signal Standard
(IOSTANDARD)
Top,
Bottom
(Banks
0,2)
Left,
Right
(Banks
1,3)
Top,
Bottom
(Banks
0,2)
Left,
Right
(Banks
1,3)
LVCMOS25 Slow 2 16
16
76
76
4 10
10
46
46
6
8
8
33
33
8
7
7
24
24
12 6
6
18
18
16 –
6
–
11
24 –
5
–
7
Fast 2 12
12
18
18
4 10
10
14
14
6
8
8
6
6
8
6
6
6
6
12 3
3
3
3
16 –
3
–
3
24 –
2
–
2
QuietIO 2 36
36
76
76
4 30
30
60
60
6 24
24
48
48
8 20
20
36
36
12 12
12
36
36
16 –
12
–
36
24 –
8
–
8
LVCMOS18 Slow 2 13
13
64
64
4
8
8
34
34
6
8
8
22
22
8
7
7
18
18
12 –
5
–
13
16 –
5
–
10
Fast 2 13
13
18
18
4
8
8
9
9
6
7
7
7
7
8
4
4
4
4
12 –
4
–
4
16 –
3
–
3
QuietIO 2 30
30
64
64
4 24
24
64
64
6 20
20
48
48
8 16
16
36
36
12 –
12
–
36
16 –
12
–
24
Table 29: Recommended Number of Simultaneously Switching
Outputs per VCCO-GND Pair (V_CCAUX=3.3V)(Continued)
Package Type
FT256, FG320,
FG400, FG484,
VQ100, TQ144
FG676
Signal Standard
(IOSTANDARD)
Top,
Bottom
(Banks
0,2)
Left,
Right
(Banks
1,3)
Top,
Bottom
(Banks
0,2)
Left,
Right
(Banks
1,3)
LVCMOS15 Slow 2 12
12
55
55
4
7
7
31
31
6
7
7
18
18
8
–
6
–
15
12 –
5
–
10
Fast 2 10
10
25
25
4
7
7
10
10
6
6
6
6
6
8
–
4
–
4
12 –
3
–
3
QuietIO 2 30
30
70
70
4 21
21
40
40
6 18
18
31
31
8
–
12
–
31
12 –
12
–
20
LVCMOS12 Slow 2 17
17
40
40
4
–
13
–
25
6
–
10
–
18
Fast 2 12
9
31
31
4
–
9
–
13
6
–
9
–
9
QuietIO 2 36
36
55
55
4
–
33
–
36
6
–
27
–
36
PCI33_3
9
9
16
16
PCI66_3
–
9
–
13
HSTL_I
–
11
–
20
HSTL_III
–
7
–
8
HSTL_I_18
13
13
17
17
HSTL_II_18
–
5
–
5
HSTL_III_18
8
8
10
8
SSTL18_I
7
13
7
15
SSTL18_II
–
9
–
9
SSTL2_I
10
10
18
18
SSTL2_II
–
6
–
9
SSTL3_I
7
8
8
10
SSTL3_II
5
6
6
7
40
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DS529-3 (v2.0) August 19, 2010