LFE3-150EA-AMC-EVN Lattice Semiconductor Corp., LFE3-150EA-AMC-EVN Datasheet - Page 63
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LFE3-150EA-AMC-EVN
Manufacturer Part Number
LFE3-150EA-AMC-EVN
Description
Specifications: Type: FPGA ; Contents: Board ; For Use With/Related Products: LFE3-150EA ; Lead Free Status: Contains Lead ; RoHS Status: RoHS Non-Compliant
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.LFE3-150EA-AMC-EVN.pdf
(141 pages)
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BLVDS25
The LatticeECP3 devices support the BLVDS standard. This standard is emulated using complementary 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. BLVDS25 Multi-point Output Example
Table 3-2. BLVDS25 DC Conditions
V
Z
R
R
R
V
V
V
V
I
1. For input buffer, see LVDS table.
DC
16mA
16mA
OUT
CCIO
OH
OL
OD
CM
S
TL
TR
Parameter
2.5V
2.5V
+
-
R
R
Output Driver Supply (+/- 5%)
Driver Impedance
Driver Series Resistor (+/- 1%)
Driver Parallel Resistor (+/- 1%)
Receiver Termination (+/- 1%)
Output High Voltage
Output Low Voltage
Output Differential Voltage
Output Common Mode Voltage
DC Output Current
90 ohms
S
S
45-90
ohms
= 90 ohms
R
= 90 ohms
Heavily loaded backplane, effective Zo ~ 45 to 90 ohms differential
S
=
2.5V
Over Recommended Operating Conditions
R
16mA
1
TL
Description
90 ohms
2.5V
R
S
=
16mA
3-10
-
. . .
. . .
90 ohms
R
2.5V
S
=
16mA
Zo = 45
10.00
90.00
45.00
45.00
11.24
2.50
1.38
1.12
0.25
1.25
90 ohms
DC and Switching Characteristics
R
2.5V
S
45-90
ohms
Typical
=
LatticeECP3 Family Data Sheet
16mA
Zo = 90
90 ohms
90 ohms
10.00
90.00
90.00
90.00
10.20
R
R
2.50
1.48
1.02
0.46
1.25
R
S
S
TR
=
=
-
Units
2.5V
2.5V
mA
V
V
V
V
V
16mA
16mA
+
-
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