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LFE3-70EA-8FN1156C
LFE3-70EA-8FN1156C | |
|---|---|
| Manufacturer Part Number | LFE3-70EA-8FN1156C |
| Description | 66.5K LUTS, 490 I/O, SERDES, 1.2V, -8 SPEED, PB-FREE |
| Manufacturer | LATTICE SEMICONDUCTOR |
| LFE3-70EA-8FN1156C datasheets |
|
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PrevNext
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)
V CCIO = 2.5V
(+/-5%)
8mA
V CCIO = 2.5V
(+/-5%)
8mA
On-chip
Table 3-4. RSDS25E DC Conditions
Parameter
V
Output Driver Supply (+/-5%)
CCIO
Z
Driver Impedance
OUT
R
Driver Series Resistor (+/-1%)
S
R
Driver Parallel Resistor (+/-1%)
P
R
Receiver Termination (+/-1%)
T
V
Output High Voltage
OH
V
Output Low Voltage
OL
V
Output Differential Voltage
OD
V
Output Common Mode Voltage
CM
Z
Back Impedance
BACK
I
DC Output Current
DC
1. For input buffer, see LVDS table.
R
= 294 ohms
S
(+/-1%)
R
= 121 ohms
P
(+/-1%)
R
= 294 ohms
S
(+/-1%)
Transmission line,
Zo = 100 ohm differential
Off-chip
1
Over Recommended Operating Conditions
Description
3-12
DC and Switching Characteristics
LatticeECP3 Family Data Sheet
+
R
= 100 ohms
T
(+/-1%)
-
Off-chip
On-chip
Typical
Units
2.50
V
20
294
121
100
1.35
V
1.15
V
0.20
V
1.25
V
101.5
3.66
mA
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