XA3S500E-4PQG208I Datasheet, PDF (13/37 Pages) Xilinx, Inc – Proven advanced 90-nanometer process technology

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Differential I/O Standards
Table 11: Recommended Operating Conditions for User I/Os Using Differential Signal Standards
V_CCO for Drivers⁽¹⁾
V_ID
V_ICM
IOSTANDARD
Attribute
Min (V) Nom (V) Max (V)
Min
(mV)
Nom
(mV)
Max
(mV)
Min (V) Nom (V)
LVDS_25
2.375
2.50
2.625
100
350
600
0.30
1.25
BLVDS_25
2.375
2.50
2.625
100
350
600
0.30
1.25
MINI_LVDS_25
2.375
2.50
2.625
200
-
600
0.30
-
LVPECL_25⁽²⁾
Inputs Only
100
800
1000
0.5
1.2
RSDS_25
2.375
2.50
2.625
100
200
-
0.3
1.20
DIFF_HSTL_I_18
1.7
1.8
1.9
100
-
-
0.8
-
DIFF_HSTL_III_18
1.7
1.8
1.9
100
-
-
0.8
-
DIFF_SSTL18_I
1.7
1.8
1.9
100
-
-
0.7
-
DIFF_SSTL2_I
2.3
2.5
2.7
100
-
-
1.0
-
Max (V)
2.20
2.20
2.2
2.0
1.4
1.1
1.1
1.1
1.5
Notes:
1. The V_CCO rails supply only differential output drivers, not input circuits.
2. V_REF inputs are not used for any of the differential I/O standards.
Table 12: DC Characteristics of User I/Os Using Differential Signal Standards
V_OD
ΔV_OD
V_OCM
ΔV_OCM
V_OH
IOSTANDARD
Min Typ Max Min Max Min Typ Max Min Max
Min
Attribute
(mV) (mV) (mV) (mV) (mV) (V)
(V)
(V) (mV) (mV)
(V)
V_OL
Max
(V)
LVDS_25
250 350 450
–
– 1.125 – 1.375 –
–
–
–
BLVDS_25
250 350 450
–
–
–
1.20
–
–
–
–
–
MINI_LVDS_25
300
–
600
–
50 1.0
–
1.4
–
50
–
–
RSDS_25
100
–
400
–
–
1.1
–
1.4
–
–
–
–
DIFF_HSTL_I_18
–
–
–
–
–
–
–
–
–
– V_CCO – 0.4
0.4
DIFF_HSTL_III_18
–
–
–
–
–
–
–
–
–
– V_CCO – 0.4
0.4
DIFF_SSTL18_I
–
–
–
–
–
–
–
–
–
–
V_TT + 0.475 V_TT – 0.475
DIFF_SSTL2_I
–
–
–
–
–
–
–
–
–
– V_TT + 0.61 V_TT – 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_T) of 100Ω across the N and P pins of the
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