XC2S50 Xilinx, Inc., XC2S50 Datasheet - Page 49

• Manufacturer Part Number: XC2S50
• Description: Spartan-II 2.5V FPGA Family
• Manufacturer: Xilinx, Inc.

Spartan-II 2.5V FPGA Family: Functional Description
SSTL2_I
A sample circuit illustrating a valid termination technique for
SSTL2_I appears in
appear in
Table 26: SSTL2_I Voltage Specifications
Module 2 of 4
42
Notes:
1.
2.
3.
V
V
V
V
V
V
V
I
I
OH
OL
OH
OL
CCO
REF
TT
IH
IL
N must be greater than or equal to –0.04 and less than or
equal to 0.04.
V
V
at V
≤ V
SSTL2 Class I
at V
≥ V
= V
≤ V
IH
IL
≥ V
= 0.5 × V
V
minimum does not conform to the formula.
REF
maximum is V
CCO
REF
REF
OL
REF
OH
REF
Figure 48: Terminated SSTL2 Class I
Parameter
Table 26
(mA)
= 2.5V
– 0.18
(mA)
– 0.61
+ 0.18
+ N
+ 0.61
25Ω
CCO
(1)
CCO
Figure
+ 0.3.
48. DC voltage specifications
Z = 50
V
REF
–0.3
1.15
1.11
1.33
1.76
–7.6
Min
2.3
7.6
-
= 1.25V
(3)
V
50Ω
TT
= 1.25V
1.25
1.25
1.43
1.07
DS001_49_061200
Typ
2.5
-
-
-
-
3.0
Max
1.35
1.39
1.17
0.74
2.7
www.xilinx.com
1-800-255-7778
-
-
-
(2)
SSTL2 Class II
A sample circuit illustrating a valid termination technique for
SSTL2_II appears in
appear in
Table 27: SSTL2_II Voltage Specifications
Notes:
1.
2.
3.
V
V
V
V
V
V
V
I
I
OH
OL
OH
OL
CCO
REF
TT
IH
IL
N must be greater than or equal to –0.04 and less than or
equal to 0.04.
V
V
at V
≤ V
SSTL2 Class II
at V
≥ V
= V
≤ V
IH
IL
≥ V
= 0.5 × V
V
minimum does not conform to the formula.
REF
maximum is V
CCO
Parameter
REF
OL
REF
REF
OH
Figure 49: Terminated SSTL2 Class II
REF
Table
(mA)
= 2.5V
– 0.18
(mA)
+ 0.18
- 0.8
+ N
+ 0.8
25Ω
27.
CCO
(1)
V
50Ω
CCO
TT
Figure
= 1.25V
+ 0.3.
DS001-2 (v2.2) September 3, 2003
49. DC voltage specifications
–0.3
–15.2
V
1.15
1.11
1.33
1.95
15.2
Min
2.3
Z = 50
REF
-
(3)
= 1.25V
V
50Ω
TT
Product Specification
= 1.25V
1.25
1.25
1.43
1.07
Typ
2.5
-
-
-
-
DS001_50_061200
3.0
Max
1.35
1.39
1.17
0.55
2.7
-
-
-
(2)
R