XP2 Datasheet, PDF (52/92 Pages) Lattice Semiconductor – LatticeXP2 Family Data Sheet

Lattice Semiconductor
DC and Switching Characteristics
LatticeXP2 Family Data Sheet
sysIO Differential Electrical Characteristics
LVDS
Over Recommended Operating Conditions
Parameter
Description
V_INP, V_INM
V_CM
V_THD
I_IN
V_OH
V_OL
V_OD
ΔV_OD
Input Voltage
Input Common Mode Voltage
Differential Input Threshold
Input Current
Output High Voltage for V_OP or V_OM
Output Low Voltage for V_OP or V_OM
Output Voltage Differential
Change in V_OD Between High and
Low
V_OS
ΔV_OS
Output Voltage Offset
Change in V_OS Between H and L
I_SA,I_SA
Output Short Circuit Current
I_SAB
Output Short Circuit Current
Test Conditions
Half the Sum of the Two Inputs
Difference Between the Two Inputs
Power On or Power Off
R_T = 100 Ohm
R_T = 100 Ohm
(V_OP - V_OM), R_T = 100 Ohm
(V_OP + V_OM)/2, R_T = 100 Ohm
V_OD = 0V Driver Outputs Shorted to
Ground
V_OD = 0V Driver Outputs Shorted to
Each Other
Min.
0
0.05
+/-100
—
—
0.9V
250
—
1.125
—
—
Typ.
—
—
—
—
1.38
1.03
350
—
1.20
—
—
Max.
2.4
2.35
—
+/-10
1.60
—
450
Units
V
V
mV
µA
V
V
mV
50
mV
1.375 V
50
mV
24
mA
—
—
12
mA
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.
For further information on LVPECL, RSDS, MLVDS, BLVDS and other differential interfaces please see details of
additional technical information at the end of this data sheet.
LVDS25E
The top and bottom sides of LatticeXP2 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
VCCIO = 2.5V (±5%)
8 mA
RS=158 ohms
(±1%)
VCCIO = 2.5V (±5%)
8 mA
RS=158 ohms
(±1%)
RP = 140 ohms
(±1%)
RT = 100 ohms
(±1%)
Transmission line, Zo = 100 ohm differential
ON-chip OFF-chip
OFF-chip ON-chip
3-8