
Virtex-II Platform FPGAs: DC and Switching Characteristics
R
DS031-3 (v3.5) November 5, 2007
Module 3 of 4
Product Specification
5
LDT Differential Signal DC Specifications (LDT_25)
LVDS DC Specifications (LVDS_33 & LVDS_25)
SSTL3 I
– 0.5
VREF –0.2
VREF + 0.2
VCCO + 0.5
VREF –0.6
VREF + 0.6
8
– 8
SSTL3 II
– 0.5
VREF –0.2
VREF + 0.2
VCCO + 0.5
VREF –0.8
VREF + 0.8
16
– 16
SSTL2 I
– 0.5
VREF –0.15
VREF + 0.15
VCCO + 0.5
VREF –0.65
VREF + 0.65
7.6
– 7.6
SSTL2 II
– 0.5
VREF –0.15
VREF + 0.15
VCCO + 0.5
VREF –0.80
VREF + 0.80
15.2
– 15.2
AGP
– 0.5
VREF –0.2
VREF + 0.2
VCCO + 0.5
10% VCCO
90% VCCO
Note 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.
Table 6: DC Input and Output Levels (Continued)
Input/Output
Standard
VIL
VIH
VOL
VOH
IOL
IOH
V, Min
V, Max
V, Min
V, Max
V, Min
mA
Table 7: LDT DC Specifications
DC Parameter
Symbol
Conditions
Min
Typ
Max
Units
Differential Output Voltage
VOD
RT = 100 Ω across Q and Q signals
500
600
700
mV
Change in VOD Magnitude
Δ V
OD
–
15
mV
Output Common Mode Voltage
VOCM
RT = 100 Ω across Q and Q signals
560
600
640
mV
Change in VOS Magnitude
Δ V
OCM
–
15
mV
Input Differential Voltage
VID
200
600
1000
mV
Change in VID Magnitude
Δ V
ID
–
15
mV
Input Common Mode Voltage
VICM
500
600
700
mV
Change in VICM Magnitude
Δ V
ICM
–
15
mV
Table 8: LVDS DC Specifications
DC Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Voltage
VCCO
3.3 or 2.5
V
Output High Voltage for Q and Q
VOH
RT = 100 Ω across Q and Q signals
1.575
V
Output Low Voltage for Q and Q
VOL
RT = 100 Ω across Q and Q signals
0.925
V
Differential Output Voltage (Q – Q),
Q = High (Q –Q), Q = High
VODIFF
RT = 100 Ω across Q and Q signals
250
350
400
mV
Output Common-Mode Voltage
VOCM
RT = 100 Ω across Q and Q signals
1.125
1.2
1.375
V
Differential Input Voltage (Q – Q),
Q = High (Q –Q), Q = High
VIDIFF
Common-mode input voltage = 1.25 V
100
350
N/A
mV
Input Common-Mode Voltage
VICM
Differential input voltage =
±350 mV
0.2
1.25
VCCO – 0.5
V