Chapter 6: SelectIO Resources
HSTL Class III (1.8V)
Figure 6-62
Class III (1.8V).
X-Ref Target - Figure 6-62
Table 6-25
Table 6-25: HSTL Class III (1.8V) DC Voltage Specifications
Notes:
1. V
2. Per EIA/JESD8-6, "The value of V
270
shows a sample circuit illustrating a valid termination technique for HSTL
External Termination
IOB
HSTL_III_18
DCI
IOB
HSTL_III_DCI_18
Figure 6-62: HSTL Class III (1.8V) Termination
lists the HSTL Class III (1.8V) DC voltage specifications.
V
CCO
(2)
V
REF
V
TT
V
IH
V
IL
V
OH
V
OL
(1)
I
at V
(mA)
OH
OH
(1)
I
at V
(mA)
OL
OL
and V
for lower drive currents are sample tested.
OL
OH
the use conditions specified by the user."
www.xilinx.com
V
= 1.8V
TT
IOB
R P = Z 0 = 50Ω
Z 0
V
IOB
V
= 1.8V
CCO
R
= Z 0 = 50Ω
VRP
Z 0
V
Min
1.7
–
–
V
+ 0.1
REF
–
V
– 0.4
CCO
–
–8
24
is to be selected by the user to provide optimum noise margin in
REF
HSTL_III_18
+
–
= 1.1V
REF
HSTL_III_DCI_18
+
–
= 1.1V
REF
ug190_6_59_030306
Typ
Max
1.8
1.9
1.1
–
V
–
CCO
–
–
–
V
– 0.1
REF
–
–
–
0.4
–
–
–
–
Virtex-5 FPGA User Guide
UG190 (v5.0) June 19, 2009