R
Differential I/O Standards
Table 11: Recommended Operating Conditions for User I/Os Using Differential Signal Standards
VCCO for Drivers(1)
VID
VICM
IOSTANDARD
Attribute
Min
(mV)
Nom
(mV)
Max
(mV)
Min (V)
Nom (V)
2.50
Max (V)
Min (V)
0.30
0.30
0.30
0.5
Nom (V)
Max (V)
2.20
2.20
2.2
LVDS_25
2.375
2.375
2.375
2.625
2.625
2.625
100
100
200
100
100
100
100
100
100
350
600
1.25
BLVDS_25
2.50
350
600
1.25
MINI_LVDS_25
LVPECL_25(2)
RSDS_25
2.50
-
600
-
Inputs Only
2.50
800
1000
1.2
2.0
2.375
1.7
2.625
1.9
200
-
-
-
-
-
0.3
1.20
1.4
DIFF_HSTL_I_18
DIFF_HSTL_III_18
DIFF_SSTL18_I
DIFF_SSTL2_I
1.8
-
-
-
-
0.8
-
-
-
-
1.1
1.7
1.8
1.9
0.8
1.1
1.7
1.8
1.9
0.7
1.1
2.3
2.5
2.7
1.0
1.5
Notes:
1. The V
rails supply only differential output drivers, not input circuits.
CCO
2.
V
inputs are not used for any of the differential I/O standards.
REF
Table 12: DC Characteristics of User I/Os Using Differential Signal Standards
VOD
ΔVOD
Min Max
(mV) (mV)
VOCM
ΔVOCM
VOH
VOL
IOSTANDARD
Attribute
Min
(mV)
Typ
(mV)
Max
(mV)
Min
(V)
Typ
(V)
Max
(V)
Min
Max
Min
(V)
Max
(V)
(mV)
(mV)
LVDS_25
250
250
300
100
–
350
350
–
450
450
600
400
–
–
–
–
–
–
–
–
–
–
–
1.125
–
1.20
–
1.375
–
–
–
–
–
–
–
–
–
–
–
–
–
BLVDS_25
–
1.0
1.1
–
–
1.4
1.4
–
–
MINI_LVDS_25
RSDS_25
50
–
50
–
–
–
–
–
–
–
DIFF_HSTL_I_18
DIFF_HSTL_III_18
DIFF_SSTL18_I
DIFF_SSTL2_I
–
–
–
–
VCCO – 0.4
VCCO – 0.4
0.4
0.4
–
–
–
–
–
–
–
–
VTT + 0.475 VTT – 0.475
VTT + 0.61 VTT – 0.61
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Notes:
1. The numbers in this table are based on the conditions set forth in Table 6, and Table 11.
2. Output voltage measurements for all differential standards are made with a termination resistor (R ) of 100Ωacross the N and P pins of the
T
differential signal pair. The exception is for BLVDS, shown in Figure 5 below.
3. At any given time, no more than two of the following differential output standards may be assigned to an I/O bank: LVDS_25, RSDS_25,
MINI_LVDS_25
DS635 (v2.0) September 9, 2009
www.xilinx.com
Product Specification
13
XILINX [ XILINX, INC ]
