XCV405E-7BG556I XILINX [Xilinx, Inc], XCV405E-7BG556I Datasheet - Page 43
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XCV405E-7BG556I
Manufacturer Part Number
XCV405E-7BG556I
Description
Virtex-E 1.8 V Extended Memory Field Programmable Gate Arrays
Manufacturer
XILINX [Xilinx, Inc]
Datasheet
1.XCV405E-7BG556I.pdf
(116 pages)
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Application Examples
Creating a design with the SelectI/O features requires the
instantiation of the desired library symbol within the design
code. At the board level, designers need to know the termi-
nation techniques required for each I/O standard.
This section describes some common application examples
illustrating the termination techniques recommended by
each of the standards supported by the SelectI/O features.
Termination Examples
Circuit examples involving typical termination techniques for
each of the SelectI/O standards follow. For a full range of
accepted values for the DC voltage specifications for each
standard, refer to the table associated with each figure.
The resistors used in each termination technique example
and the transmission lines depicted represent board level
components and are not meant to represent components
on the device.
GTL
A sample circuit illustrating a valid termination technique for
GTL is shown in
fications.
DS025-2 (v2.1) July 17, 2002
V
GTL
CCO
R
Figure 44: Terminated GTL
= N/A
Figure
50Ω
V
TT
44.
= 1.2V
Table 23
V
REF
= 0.8V
Z = 50
50Ω
V
TT
lists DC voltage speci-
= 1.2V
x133_08_111699
Virtex™-E 1.8 V Extended Memory Field Programmable Gate Arrays
www.xilinx.com
1-800-255-7778
Table 23:
GTL+
A sample circuit illustrating a valid termination technique for
GTL+ appears in
appear in
Table 24:
V
V
V
V
V
V
V
I
I
I
V
V
V
V
V
V
V
I
I
I
OH
OL
OL
OH
OL
OL
OH
OL
OH
OL
CCO
REF
TT
IH
IL
CCO
REF
TT
IH
IL
at V
at V
at V
at V
Note: N must be greater than or equal to 0.653 and less than
or equal to 0.68.
Note: N must be greater than or equal to 0.653 and less than
or equal to 0.68.
= V
= V
= V
at V
= V
at V
= N × V
= N × V
Parameter
REF
OL
OL
REF
OL
OL
REF
REF
Parameter
OH
OH
Table
(mA) at 0.4V
(mA) at 0.2V
(mA) at 0.6V
(mA) at 0.3V
V
(mA)
GTL+ Voltage Specifications
GTL Voltage Specifications
– 0.05
– 0.1
(mA)
CCO
+ 0.05
+ 0.1
TT
Figure 45: Terminated GTL+
TT
24.
1
1
= N/A
50Ω
V
Figure
TT
V
= 1.5V
REF
45. DC voltage specifications
GTL+
Z = 50
0.88
1.35
0.98
Min
= 1.0V
0.3
36
-
-
-
-
-
0.74
1.14
0.79
50Ω
Min
V
32
-
-
-
-
-
-
TT
= 1.5V
x133_09_012400
0.45
Typ
1.0
1.5
1.1
0.9
-
-
-
-
-
0.85
0.75
Typ
N/A
0.8
1.2
0.2
-
-
-
-
Module 2 of 4
Max
1.12
1.65
1.02
0.6
Max
0.86
1.26
0.81
48
0.4
40
-
-
-
-
-
-
-
-
-
-
39
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