LFXP2-5E-5FT256I LATTICE SEMICONDUCTOR, LFXP2-5E-5FT256I Datasheet - Page 55

• Manufacturer Part Number: LFXP2-5E-5FT256I
• Description: FPGA LatticeXP2 Family 5000 Cells Flash Technology 1.2V 256-Pin FTBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFXP2-5E-5FT256I

• Package: 256FTBGA
• Family Name: LatticeXP2
• Device Logic Units: 5000
• Typical Operating Supply Voltage: 1.2 V
• Maximum Number Of User I/os: 172
• Ram Bits: 169984
• Re-programmability Support: Yes

Lattice Semiconductor
LVPECL
The LatticeXP2 devices support the differential LVPECL standard. This standard is emulated using complementary
LVCMOS outputs in conjunction with a parallel resistor across the driver outputs. The LVPECL input standard is
supported by the LVDS differential input buffer. 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
V
V
V
Z
R
R
R
V
V
V
V
Z
I
1. For input buffer, see LVDS table.
DC
CCIO
CCIO
OUT
OH
OL
OD
BACK
CCIO
T
CM
S
P
Parameter
(+/-5%)
(+/-5%)
On-chip
= 3.3V
= 3.3V
R
R
Over Recommended Operating Conditions
Output Driver Supply (+/-5%)
Driver Impedance
Driver Series Resistor (+/-1%)
Driver Parallel Resistor (+/-1%)
Receiver Termination (+/-1%)
Output High Voltage (After R
Output Low Voltage (After R
Output Differential Voltage (After R
Output Common Mode Voltage
Back Impedance
DC Output Current
S
S
1
Off-chip
= 93.1 ohms
= 93.1 ohms
(+/-1%)
(+/-1%)
Description
Zo = 100 ohm differential
R
P
Transmission line,
= 196 ohms
(+/-1%)
3-11
P
P
)
)
P
)
R
T
= 100 ohms
DC and Switching Characteristics
(+/-1%)
Typical
12.11
100.5
3.30
2.05
1.25
0.80
1.65
196
100
LatticeXP2 Family Data Sheet
10
93
Off-chip
Units
mA





V
V
V
V
V
On-chip
+
-