
3-11
DC and Switching Characteristics
Lattice Semiconductor
LatticeXP Family Data Sheet
Figure 3-2. BLVDS Multi-point Output Example
Table 3-2. BLVDS DC Conditions
1
Over Recommended Operating Conditions
Typical
Symbol
Description
Zo = 45
Zo = 90
Units
ZOUT
Output impedance
100
ohms
RTLEFT
Left end termination
45
90
ohms
RTRIGHT
Right end termination
45
90
ohms
VOH
Output high voltage
1.375
1.48
V
VOL
Output low voltage
1.125
1.02
V
VOD
Output differential voltage
0.25
0.46
V
VCM
Output common mode voltage
1.25
V
IDC
DC output current
11.2
10.2
mA
1. For input buffer, see LVDS table.
Heavily loaded backplane, effective Zo ~ 45 to 90 ohms differential
100
2.5V
+
-
100
2.5V
+
-
100
2.5V
+
-
100
2.5V
+
-
. . .
45-90 ohms, +/- 1%
+
-
+
-
. . .
-
%