lfsc3ga15e-7f900c Lattice Semiconductor Corp., lfsc3ga15e-7f900c Datasheet - Page 54

• Manufacturer Part Number: lfsc3ga15e-7f900c
• Description: Latticesc/m Fpga Data Sheets
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
LVPECL
The LatticeSC devices support differential LVPECL standard. This standard is emulated using controlled imped-
ance complementary LVCMOS outputs in conjunction with a parallel resistor across the driver outputs. The scheme
shown in Figure 3-3 is one possible solution for point-to-point signals.
Figure 3-3. Differential LVPECL
Table 3-3. LVPECL DC Conditions
For further information on LVPECL, BLVDS, MLVDS and other differential interfaces please see details of additional
technical documentation at the end of this data sheet.
On-die Differential Common Mode Termination
~16 ohms
~16 ohms
24mA
24mA
Z
R
R
R
V
V
V
V
Z
I
1. For input buffer, see LVDS table.
DC
C
OUT
OH
OL
OD
BACK
S
P
T
CM
CMT
Symbol
Symbol
3.3V
3.3V
ON-chip
Capacitance V
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
Over Recommended Operating Conditions
1
Description
OFF-chip
Description
85 ohms
85 ohms
+/-1%
+/-1%
CMT
Transmission line, Zo = 100 ohm differential
to GND
3-10
ohms
150
Min.
—
Nominal
DC and Switching Characteristics
Typ.
Zback
2.03
1.27
0.76
1.65
12.6
150
100
40
16
85
86
LatticeSC/M Family Data Sheet
Max.
—
ohms
100
Units
ohm
ohm
ohm
ohm
ohm
Units
mA
V
V
V
V
pF
+
-