XC3S50A-4TQG144C Datasheet, PDF (39/132 Pages) Xilinx, Inc – Spartan-3A FPGA Family

DC and Switching Characteristics
Table 28: Equivalent V_CCO/GND Pairs per Bank
Device
XC3S50A
XC3S200A
XC3S400A
XC3S700A
XC3S1400A
VQ100
1
1
–
–
–
TQ144
2
–
–
–
–
Package Style (including Pb-free)
FT256
FG320
FG400
3
–
–
4
4
–
4
4
5
4
–
5
4
–
–
FG484
–
–
–
5
6
FG676
–
–
–
–
9
Table 29: Recommended Number of Simultaneously Switching
Outputs per VCCO-GND Pair (V_CCAUX=3.3V)
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)
Single-Ended Standards
LVTTL
Slow 2 20
20
60
60
4 10
10
41
41
6 10
10
29
29
8
6
6
22
22
12 6
6
13
13
16 5
5
11
11
24 4
4
9
9
Fast 2 10
10
10
10
4
6
6
6
6
6
5
5
5
5
8
3
3
3
3
12 3
3
3
3
16 3
3
3
3
24 2
2
2
2
QuietIO 2 40
40
80
80
4 24
24
48
48
6 20
20
36
36
8 16
16
27
27
12 12
12
16
16
16 9
9
13
13
24 9
9
12
12
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)
LVCMOS33 Slow 2 24
24
76
76
4 14
14
46
46
6 11
11
27
27
8 10
10
20
20
12 9
9
13
13
16 8
8
10
10
24 –
8
–
9
Fast 2 10
10
10
10
4
8
8
8
8
6
5
5
5
5
8
4
4
4
4
12 4
4
4
4
16 2
2
2
2
24 –
2
–
2
QuietIO 2 36
36
76
76
4 32
32
46
46
6 24
24
32
32
8 16
16
26
26
12 16
16
18
18
16 12
12
14
14
24 –
10
–
10
DS529-3 (v2.0) August 19, 2010
www.xilinx.com
39