LFE3-95EA-7FN672C LATTICE SEMICONDUCTOR, LFE3-95EA-7FN672C Datasheet - Page 65
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LFE3-95EA-7FN672C
Manufacturer Part Number
LFE3-95EA-7FN672C
Description
FPGA LATTICEECP3
Manufacturer
LATTICE SEMICONDUCTOR
Datasheet
1.LFE3-150EA-7FN672C.pdf
(136 pages)
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LFE3-95EA-7FN672C
Manufacturer:
Lattice Semiconductor Corporation
Quantity:
10 000
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Lattice Semiconductor
RSDS25E
The LatticeECP3 devices support differential RSDS and RSDSE standards. This standard is emulated using com-
plementary LVCMOS outputs in conjunction with a parallel resistor across the driver outputs. The RSDS input stan-
dard is supported by the LVDS differential input buffer. The scheme shown in Figure 3-4 is one possible solution for
RSDS standard implementation. Resistor values in Figure 3-4 are industry standard values for 1% resistors.
Figure 3-4. RSDS25E (Reduced Swing Differential Signaling)
Table 3-4. RSDS25E DC Conditions
8mA
8mA
V CCIO = 2.5V
V CCIO = 2.5V
V
Z
R
R
R
V
V
V
V
Z
I
1. For input buffer, see LVDS table.
Parameter
DC
OUT
BACK
CCIO
OH
OL
OD
CM
S
P
T
On-chip
(+/-5%)
(+/-5%)
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
Back Impedance
DC Output Current
Over Recommended Operating Conditions
R
R
S
S
Off-chip
= 294 ohms
= 294 ohms
(+/-1%)
(+/-1%)
1
Description
R
P
Zo = 100 ohm differential
= 121 ohms
(+/-1%)
3-12
Transmission line,
R
T
DC and Switching Characteristics
= 100 ohms
(+/-1%)
Typical
101.5
LatticeECP3 Family Data Sheet
2.50
1.35
1.15
0.20
1.25
3.66
294
121
100
20
Off-chip
Units
mA
V
V
V
V
V
On-chip
+
-
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