Altera Corporation
6–19
June 2006
Stratix GX Device Handbook, Volume 1
DC & Switching Characteristics
VOH
High-level output voltage
IOH = –8.1 mA
VTT + 0.57
V
VOL
Low-level output voltage
VTT – 0.57
V
Table 6–24. SSTL-2 Class II Specifications
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VCCIO
Output supply voltage
2.3
2.5
2.7
V
VTT
Termination voltage
VREF – 0.04
VREF
VREF + 0.04
V
VREF
Reference voltage
1.15
1.25
1.35
V
VIH
High-level input voltage
VREF + 0.18
VCCIO + 0.3
V
VIL
Low-level input voltage
–0.3
VREF – 0.18
V
VOH
High-level output voltage
IOH = –16.4 mA
VTT + 0.76
V
VOL
Low-level output voltage
VTT – 0.76
V
Table 6–25. SSTL-3 Class I Specifications
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VCCIO
Output supply voltage
3.0
3.3
3.6
V
VTT
Termination voltage
VREF – 0.05 VREF
VREF + 0.05
V
VREF
Reference voltage
1.3
1.5
1.7
V
VIH
High-level input voltage
VREF + 0.2
VCCIO + 0.3
V
VIL
Low-level input voltage
–0.3
VREF – 0.2
V
VOH
High-level output voltage
VTT + 0.6
V
VOL
Low-level output voltage
VTT – 0.6
V
Table 6–26. SSTL-3 Class II Specifications (Part 1 of 2)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VCCIO
Output supply voltage
3.0
3.3
3.6
V
VTT
Termination voltage
VREF – 0.05 VREF
VREF + 0.05
V
VREF
Reference voltage
1.3
1.5
1.7
V
VIH
High-level input voltage
VREF + 0.2
VCCIO + 0.3
V
Table 6–23. SSTL-2 Class I Specifications (Part 2 of 2)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units