R
Virtex-II Platform FPGAs: DC and Switching Characteristics
Extended LVDS DC Specifications (LVDSEXT_33 & LVDSEXT_25)
Table 9: Extended LVDS DC Specifications
DC Parameter
Supply Voltage
Symbol
VCCO
VOH
Conditions
Min
Typ
Max
Units
3.3 or 2.5
V
V
V
Output High voltage for Q and Q
Output Low voltage for Q and Q
RT = 100 Ω across Q and Q signals
RT = 100 Ω across Q and Q signals
1.785
VOL
0.705
440
Differential output voltage (Q – Q),
Q = High (Q – Q), Q = High
VODIFF
VOCM
VIDIFF
VICM
RT = 100 Ω across Q and Q signals
RT = 100 Ω across Q and Q signals
Common-mode input voltage = 1.25 V
Differential input voltage = ±350 mV
820
1.375
mV
V
Output common-mode voltage
1.125
100
1.200
350
Differential input voltage (Q – Q),
Q = High (Q – Q), Q = High
N/A
mV
V
Input common-mode voltage
0.2
1.25
VCCO – 0.5
LVPECL DC Specifications
These values are valid when driving a 100 Ω differential
load only, i.e., a 100 Ω resistor between the two receiver
common-mode ranges. Table 10 summarizes the DC output
specifications of LVPECL. For more information on using
LVPECL, see the Virtex-II User Guide.
pins. The V levels are 200 mV below standard LVPECL
OH
levels and are compatible with devices tolerant of lower
Table 10: LVPECL DC Specifications
DC Parameter
Min
Max
Min
Max
Min
Max
Units
V
3.0
3.3
3.6
V
V
V
V
V
V
CCO
V
1.8
0.96
1.49
0.86
0.3
2.11
1.27
2.72
2.125
–
1.92
1.06
1.49
0.86
0.3
2.28
1.43
2.72
2.125
–
2.13
1.30
1.49
0.86
0.3
2.41
1.57
2.72
2.125
–
OH
V
OL
V
IH
V
IL
Differential Input Voltage
DS031-3 (v3.5) November 5, 2007
Product Specification
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