lfsc3ga15e-7f900c Lattice Semiconductor Corp., lfsc3ga15e-7f900c Datasheet - Page 53

• Manufacturer Part Number: lfsc3ga15e-7f900c
• Description: Latticesc/m Fpga Data Sheets
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
BLVDS
The LatticeSC devices support BLVDS standard. This standard is emulated using controlled impedance comple-
mentary LVCMOS outputs in conjunction with a parallel external resistor across the driver outputs. BLVDS is
intended for use when multi-drop and bi-directional multi-point differential signaling is required. The scheme shown
in Figure 3-2 is one possible solution for bi-directional multi-point differential signals.
Figure 3-2. BLVDS Multi-point Output Example
Table 3-2. BLVDS DC Conditions
100
100
2.5V
2.5V
+
+
-
-
Z
R
R
V
V
V
V
I
1. For input buffer, see LVDS table.
DC
OUT
OH
OL
OD
TLEFT
TRIGHT
CM
Symbol
45-90 ohms, +/- 1%
2.5V
100
Heavily loaded backplane, effective Zo ~ 45 to 90 ohms differential
Over Recommended Operating Conditions
Output impedance
Left end termination
Right end termination
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
DC output current
1
2.5V
%
100
Description
+
-
3-9
. . .
. . .
2.5V
Zo = 45
100
1.375
1.125
0.25
1.25
11.2
100
45
45
Nominal
DC and Switching Characteristics
45-90 ohms, +/- 1%
2.5V
LatticeSC/M Family Data Sheet
-
Zo = 90
100
1.48
1.02
0.46
1.25
10.2
100
90
90
+
Units
ohm
ohm
ohm
mA
-
V
V
V
V
2.5V
2.5V
+
-
100
100