lamxo256e Lattice Semiconductor Corp., lamxo256e Datasheet - Page 35

• Manufacturer Part Number: lamxo256e
• Description: La-machxo Automotive Family Data Sheet
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Table 3-1. LVDS DC Conditions
BLVDS
The LA-MachXO automotive family supports the BLVDS standard through emulation. The output is emulated using
complementary LVCMOS outputs in conjunction with a parallel external resistor across the driver outputs. The
input standard is supported by the LVDS differential input buffer on certain devices. 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
Z
R
R
R
V
V
V
V
Z
I
DC
OUT
OH
OL
OD
CM
BACK
S
P
T
Parameter
16mA
16mA
2.5V
2.5V
+
-
Output impedance
Driver series resistor
Driver parallel resistor
Receiver termination
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
Back impedance
DC output current
80
80
Heavily loaded backplane, effective Zo ~ 45 to 90 ohms differential
2.5V
Over Recommended Operating Conditions
45-90 ohms
80
16mA
Description
2.5V
80
16mA
3-9
-
. . .
. . .
LA-MachXO Automotive Family Data Sheet
2.5V
80
16mA
Typical
1.43
1.07
0.35
1.25
3.66
294
121
100
100
20
DC and Switching Characteristics
2.5V
80
45-90 ohms
16mA
80
-
2.5V
2.5V
16mA
16mA
+
-
Units
mA
Ω
Ω
Ω
Ω
Ω
V
V
V
V