LCMXO256 Lattice Semiconductor Corp., LCMXO256 Datasheet - Page 36

• Manufacturer Part Number: LCMXO256
• Description: Machxo Family Data Sheet
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Table 3-2. BLVDS DC Conditions
LVPECL
The MachXO family supports the differential LVPECL standard through emulation. This output standard is emu-
lated using complementary LVCMOS outputs in conjunction with a parallel resistor across the driver outputs on all
the devices. The LVPECL input standard is supported by the LVDS differential input buffer on certain devices. 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
16mA
16mA
Z
R
R
V
V
V
V
Z
I
1. For input buffer, see LVDS table.
DC
OUT
OH
OL
OD
BACK
P
T
CM
Z
R
R
V
V
V
V
I
1. For input buffer, see LVDS table.
V
V
DC
Symbol
OUT
OH
OL
OD
CCIO
CCIO
TLEFT
TRIGHT
CM
Symbol
On-chip
= 3.3V
= 3.3V
Output impedance
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
Over Recommended Operating Conditions
Output impedance
Left end termination
Right end termination
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
DC output current
1
1
Off-chip
100 ohms
100 ohms
Description
Description
Transmission line, Zo = 100 ohm differential
150 ohms
3-10
Zo = 45
1.375
1.125
0.25
1.25
11.2
100
45
45
100 ohms
Nominal
Nominal
DC and Switching Characteristics
2.03
1.27
0.76
1.65
85.7
12.7
100
150
100
Zo = 90
1.48
1.02
0.46
1.25
10.2
100
Off-chip
90
90
MachXO Family Data Sheet
Units
ohm
ohm
ohm
Units
mA
ohm
ohm
ohm
ohm
mA
V
V
V
V
V
V
V
V
On-chip
+
-