LFEC3E-3FN256C LATTICE SEMICONDUCTOR, LFEC3E-3FN256C Datasheet - Page 44

• Manufacturer Part Number: LFEC3E-3FN256C
• Description: FPGA LatticeEC Family 3100 Cells 340MHz 130nm (CMOS) Technology 1.2V 256-Pin FBGA
• Manufacturer: LATTICE SEMICONDUCTOR

Specifications of LFEC3E-3FN256C

• Package: 256FBGA
• Family Name: LatticeEC
• Device Logic Units: 3100
• Maximum Internal Frequency: 340 MHz
• Typical Operating Supply Voltage: 1.2 V
• Maximum Number Of User I/os: 160
• Ram Bits: 56320
• In System Programmability: 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 LatticeECP/EC devices support LVDS outputs via emulated complementary LVCMOS
outputs in conjunction with a parallel resistor across the driver outputs. The scheme shown in
Figure 3-1 is one possible solution for point-to-point signals.
Figure 3-1. LVDS25E Output Termination Example
Table 3-1. LVDS25E DC Conditions
VCCIO = 2.5V (±5%)
VCCIO = 2.5V (±5%)
V
V
V
V
Z
OH
OL
OD
BACK
CM
Parameter
ON-chip
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
Back impedance
OFF-chip
CAT16-LV4F12
RS=165 ohms
(±1%)
RS=165 ohms
(±1%)
Bourns
Transmission line, Zo = 100 ohm differential
Description
RD = 140 ohms
(±1%)
3-8
DC and Switching Characteristics
Typical
LatticeECP/EC Family Data Sheet
RD = 100 ohms
(±1%)
1.42
1.08
0.35
1.25
100
OFF-chip ON-chip
Units
V
V
V
V
Ω
+
-