Fusion Family of Mixed Signal FPGAs
Revision 4
2-167
Overview of I/O Performance
Summary of I/O DC Input and Output Levels – Default I/O Software Settings
Table 2-86 Summary of Maximum and Minimum DC Input and Output Levels Applicable to Commercial and
Industrial Conditions
Applicable to Pro I/Os
I/O Standard
Drive
Strength
Slew
Rate
VIL
VIH
VOL
VOH
IOL IOH
Min.
V
Max.
V
Min.
V
Max.
V
Max.
V
Min.
VmA mA
3.3 V LVTTL /
3.3 V LVCMOS
12 mA
High –0.3
0.8
2
3.6
0.4
2.4
12
2.5 V LVCMOS
12 mA
High –0.3
0.7
1.7
3.6
0.7
1.7
12
1.8 V LVCMOS
12 mA
High –0.3 0.35 * VCCI
0.65 * VCCI
3.6
0.45
VCCI – 0.45 12
12
1.5 V LVCMOS
12 mA
High –0.3 0.35 * VCCI
0.65 * VCCI
3.6
0.25 * VCCI 0.75 * VCCI 12
12
3.3 V PCI
Per PCI Specification
3.3 V PCI-X
Per PCI-X Specification
3.3 V GTL
20 mA2
High –0.3 VREF – 0.05 VREF + 0.05
3.6
0.4
–
20
2.5 V GTL
20 mA2
High –0.3 VREF – 0.05 VREF + 0.05
3.6
0.4
–
20
3.3 V GTL+
35 mA
High –0.3
VREF – 0.1
VREF + 0.1
3.6
0.6
–
35
2.5 V GTL+
33 mA
High –0.3
VREF – 0.1
VREF + 0.1
3.6
0.6
–
33
HSTL (I)
8 mA
High –0.3
VREF – 0.1
VREF + 0.1
3.6
0.4
VCCI – 0.4
8
HSTL (II)
15 mA2
High –0.3
VREF – 0.1
VREF + 0.1
3.6
0.4
VCCI – 0.4
15
SSTL2 (I)
15 mA
High –0.3
VREF – 0.2
VREF + 0.2
3.6
0.54
VCCI – 0.62 15
15
SSTL2 (II)
18 mA
High –0.3
VREF – 0.2
VREF + 0.2
3.6
0.35
VCCI – 0.43 18
18
SSTL3 (I)
14 mA
High –0.3
VREF – 0.2
VREF + 0.2
3.6
0.7
VCCI – 1.1
14
SSTL3 (II)
21 mA
High –0.3
VREF – 0.2
VREF + 0.2
3.6
0.5
VCCI – 0.9
21
Notes:
1. Currents are measured at 85°C junction temperature.
2. Output drive strength is below JEDEC specification.
3. Output slew rate can be extracted by the IBIS models.
Table 2-87 Summary of Maximum and Minimum DC Input and Output Levels Applicable to Commercial and
Industrial Conditions
Applicable to Advanced I/Os
I/O Standard
Drive
Strength
Slew
Rate
VIL
VIH
VOL
VOH
IOL IOH
Min.
V
Max.
V
Min.
V
Max.
V
Max.
V
Min.
VmA mA
3.3 V LVTTL /
3.3 V LVCMOS
12 mA
High
–0.3
0.8
2
3.6
0.4
2.4
12
2.5 V LVCMOS
12 mA
High
–0.3
0.7
1.7
2.7
0.7
1.7
12
1.8 V LVCMOS
12 mA
High
–0.3
0.35 * VCCI 0.65 * VCCI
1.9
0.45
VCCI – 0.45
12
1.5 V LVCMOS
12 mA
High
–0.3
0.35 * VCCI 0.65 * VCCI 1.575 0.25 * VCCI 0.75 * VCCI
12
3.3 V PCI
Per PCI specifications
3.3 V PCI-X
Per PCI-X specifications
Note: Currents are measured at 85°C junction temperature.