R
Virtex™-II Platform FPGAs: DC and Switching Characteristics
Table 6: DC Input and Output Levels (Continued)
V
V
V
V
I
I
OH
Input/Output
Standard
SSTL3 II
SSTL2 I
IL
IH
OL
OH
OL
V, Min
– 0.5
– 0.5
– 0.5
– 0.5
V, Max
V, Min
V, Max
V, Max
V, Min
mA
16
mA
– 16
VREF – 0.2
VREF + 0.2
VCCO + 0.5
VCCO + 0.5
VCCO + 0.5
VCCO + 0.5
VREF – 0.8
VREF – 0.65
VREF – 0.80
10% VCCO
VREF + 0.8
VREF + 0.65
VREF + 0.80
90% VCCO
VREF – 0.15
VREF + 0.15
VREF + 0.15
VREF + 0.2
7.6
– 7.6
SSTL2 II
AGP
V
REF – 0.15
15.2
Note 2
– 15.2
Note 2
VREF – 0.2
Notes:
1. VOL and VOH for lower drive currents are sample tested. The DONE pin is always LVTTL 12 mA.
2. Tested according to the relevant specifications.
3. LVTTL and LVCMOS inputs have approximately 100 mV of hysteresis.
LDT Differential Signal DC Specifications (LDT_25)
Table 7: LDT DC Specifications
DC Parameter
Symbol
Conditions
R = 100 Ω across Q and Q signals
Min
500
–15
560
–15
200
–15
500
–15
Typ
Max
Units
mV
mV
mV
mV
mV
mV
mV
mV
Differential Output Voltage
V
600
700
15
OD
T
Change in V Magnitude
∆ V
OD
OD
Output Common Mode Voltage
V
R = 100 Ω across Q and Q signals
600
600
600
640
15
OCM
T
Change in V Magnitude
∆ V
OCM
OS
Input Differential Voltage
V
1000
15
ID
Change in V Magnitude
∆ V
ID
ID
Input Common Mode Voltage
V
700
15
ICM
Change in V
Magnitude
∆ V
ICM
ICM
LVDS DC Specifications (LVDS_33 & LVDS_25)
Table 8: 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
1.575
VOL
0.925
250
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
350
1.2
400
1.375
mV
V
Output Common-Mode Voltage
1.125
100
Differential Input Voltage (Q – Q),
Q = High (Q – Q), Q = High
350
1.25
N/A
mV
V
Input Common-Mode Voltage
0.2
VCCO – 0.5
DS031-3 (v3.0) August 1, 2003
Product Specification
www.xilinx.com
1-800-255-7778
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