DC & Switching Characteristics
Table 6–23. SSTL-2 Class I Specifications (Part 2 of 2)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VOH
High-level output voltage
IOH = –8.1 mA
VTT + 0.57
V
(1)
VOL
Low-level output voltage
IOL = 8.1 mA (1)
VTT – 0.57
V
Table 6–24. SSTL-2 Class II Specifications
Symbol
Parameter
Conditions
Minimum
2.3
Typical
2.5
Maximum
2.7
Units
VCCIO
Output supply voltage
Termination voltage
Reference voltage
V
V
V
V
V
V
VTT
VREF
VIH
VREF – 0.04
1.15
VREF
1.25
VREF + 0.04
1.35
High-level input voltage
Low-level input voltage
High-level output voltage
VREF + 0.18
–0.3
VCCIO + 0.3
VREF – 0.18
VIL
VOH
IOH = –16.4 mA VTT + 0.76
(1)
VOL
Low-level output voltage
IOL = 16.4 mA (1)
VTT – 0.76
V
Table 6–25. SSTL-3 Class I Specifications
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
3.6
Units
V
VCCIO
Output supply voltage
Termination voltage
3.0
3.3
VTT
VREF
VIH
VREF – 0.05 VREF
VREF + 0.05
1.7
V
Reference voltage
1.3
1.5
V
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output voltage
VREF + 0.2
–0.3
VCCIO + 0.3
VREF – 0.2
V
VIL
V
VOH
VOL
IOH = –8 mA (1) VTT + 0.6
IOL = 8 mA (1)
V
VTT – 0.6
V
Table 6–26. SSTL-3 Class II Specifications (Part 1 of 2)
Symbol
Parameter
Output supply voltage
Termination voltage
Reference voltage
Conditions
Minimum
Typical
Maximum
3.6
Units
VCCIO
3.0
3.3
V
V
V
V
VTT
VREF
VIH
VREF – 0.05 VREF
VREF + 0.05
1.7
1.3
1.5
High-level input voltage
VREF + 0.2
VCCIO + 0.3
Altera Corporation
June 2006
6–19
Stratix GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
