LFXP3C-3QN208I LATTICE SEMICONDUCTOR, LFXP3C-3QN208I Datasheet - Page 41

• Manufacturer Part Number: LFXP3C-3QN208I
• Description: FPGA LatticeXP Family 3000 Cells 320MHz 130nm (CMOS) Technology 1.8V/2.5V/3.3V 208-Pin PQFP Tray
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFXP3C-3QN208I

• Package: 208PQFP
• Family Name: LatticeXP
• Device Logic Units: 3000
• Maximum Internal Frequency: 320 MHz
• Typical Operating Supply Voltage: 1.8|2.5|3.3 V
• Maximum Number Of User I/os: 136
• Ram Bits: 55296
• Re-programmability Support: Yes

Lattice Semiconductor
Differential HSTL and SSTL
Differential HSTL and SSTL outputs are implemented as a pair of complementary single-ended outputs. All allow-
able single-ended output classes (class I and class II) are supported in this mode.
LVDS25E
The top and bottom side of LatticeXP devices support LVDS outputs via emulated complementary LVCMOS out-
puts in conjunction with a parallel resistor across the driver outputs. The scheme shown in Figure 3-1 is one possi-
ble solution for point-to-point signals.
Figure 3-1. LVDS25E Output Termination Example
Table 3-1. LVDS25E DC Conditions
BLVDS
The LatticeXP devices support BLVDS standard. This standard is emulated using complementary LVCMOS out-
puts in conjunction with a parallel external resistor across the driver outputs. BLVDS is intended for use when multi-
drop and bi-directional multi-point differential signaling is required. The scheme shown in Figure 3-2 is one possible
solution for bi-directional multi-point differential signals.
V
V
V
V
Z
I
DC
OH
OL
OD
CM
BACK
Parameter
VCCIO = 2.5V (±5%)
VCCIO = 2.5V (±5%)
ON-chip
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
Back impedance
DC output current
OFF-chip
Over Recommended Operating Conditions
CAT16-LV4F12
Description
RS=165 ohms
(±1%)
RS=165 ohms
(±1%)
Bourns
Transmission line, Zo = 100 ohm differential
RD = 140 ohms
(±1%)
3-10
Typical
1.43
1.07
0.35
1.25
3.66
100
RD = 100 ohms
(±1%)
DC and Switching Characteristics
LatticeXP Family Data Sheet
OFF-chip ON-chip
+
-
Units
ohms
mA
V
V
V
V