LFE3-95E-PCIE-DKN Lattice, LFE3-95E-PCIE-DKN Datasheet - Page 65

• Manufacturer Part Number: LFE3-95E-PCIE-DKN
• Description: MCU, MPU & DSP Development Tools LatticeECP3 PCI Express Dev Kit
• Manufacturer: Lattice

Specifications of LFE3-95E-PCIE-DKN

• Processor To Be Evaluated: LFE3-95EA-x
• Processor Series: LatticeECP3
• Interface Type: SPI
• Operating Supply Voltage: 1.2 V to 3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
MLVDS25
The LatticeECP3 devices support the differential MLVDS standard. This standard is emulated using complemen-
tary LVCMOS outputs in conjunction with a parallel resistor across the driver outputs. The MLVDS input standard is
supported by the LVDS differential input buffer. The scheme shown in Figure 3-5 is one possible solution for
MLVDS standard implementation. Resistor values in Figure 3-5 are industry standard values for 1% resistors.
Figure 3-5. MLVDS25 (Multipoint Low Voltage Differential Signaling)
Table 3-5. MLVDS25 DC Conditions
16mA
16mA
V
Z
R
R
R
V
V
V
V
I
1. For input buffer, see LVDS table.
DC
Parameter
OUT
OH
OL
OD
CCIO
CM
S
TL
TR
OE
OE
2.5V
2.5V
2.5V
+
+
-
-
35ohms
35ohms
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
R
R
S
R
S
TL
=
=
2.5V
50 to 70 ohms +/-1%
1
6
m
A
35ohms
OE
R
1
S
=
Description
Heavily loaded backplace, effective Zo~50 to 70 ohms differential
2.5V
1
6
m
A
35ohms
R
OE
S
=
3-13
2.5V
1
6
Zo=50
m
50 to 70 ohms +/-1%
10.00
35.00
50.00
50.00
21.74
35ohms
A
2.50
1.52
0.98
0.54
1.25
R
OE
S
=
DC and Switching Characteristics
2.5V
Typical
LatticeECP3 Family Data Sheet
1
6
m
35ohms
A
R
Zo=70
S
OE
10.00
35.00
70.00
70.00
20.00
=
2.50
1.60
0.90
0.70
1.25
35ohms
R
R
TR
S
35ohms
R
=
S
=
Units
mA




V
V
V
V
V
2.5V
2.5V
OE
OE
+
-
16mA
16mA