R
DC and Switching Characteristics
VINP
VINN
Differential
I/O Pair Pins
P
N
Internal
Logic
VINN
V
50%
ID
VINP
V
ICM
GND level
VINP + VINN
V
ICM = Input common mode voltage =
2
V
VINP - VINN
ID = Differential input voltage =
DS099-3_01_012304
Figure 1: Differential Input Voltages
Table 9: Recommended Operating Conditions for User I/Os Using Differential Signal Standards
VCCO for Drivers(1)
VID
VICM
VIH
VIL
IOSTANDARD
Attribute
Min
(V)
Nom
(V)
Max
(V)
Min
(mV)
Nom
(mV)
Max
(mV)
Min
(V)
Nom
(V)
Max
(V)
Min
(V)
Max
(V)
Min
(V)
Max
(V)
LVDS_25
2.375
2.375
2.375
2.50
2.50
2.625
2.625
2.625
100
100
200
100
100
350
350
-
600
600
600
1000
-
0.30
0.30
0.30
0.3
1.25
1.25
-
2.20
2.20
2.2
-
-
-
-
-
-
-
-
BLVDS_25
MINI_LVDS_25
LVPECL_25(2)
RSDS_25
2.50
Inputs Only
2.50
800
200
1.2
1.20
2.2
0.8
-
2.0
-
0.5
-
1.7
-
2.375
2.625
0.3
1.4
Notes:
1. The V
rails supply only differential output drivers, not input circuits.
CCO
2. Spartan-3E devices support this standard for inputs only, not for outputs.
3. inputs are not used for any of the differential I/O standards.
V
REF
8
www.xilinx.com
DS312-3 (v1.0) March 1, 2005
Advance Product Specification
XILINX [ XILINX, INC ]
