Altera Corporation
6–17
June 2006
Stratix GX Device Handbook, Volume 1
DC & Switching Characteristics
VIPU
Input pull-up voltage
0.7 ×
VCCIO
V
VOH
High-level output voltage
IOUT = –500
μA0.9 ×
VCCIO
V
VOL
Low-level output voltage
IOUT = 1,500
μA0.1 ×
VCCIO
V
Table 6–19. GTL+ I/O Specifications
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VTT
Termination voltage
1.35
1.5
1.65
V
VREF
Reference voltage
0.88
1.0
1.12
V
VIH
High-level input voltage
VREF + 0.1
V
VIL
Low-level input voltage
VREF –
0.1
V
VOL
Low-level output voltage
0.65
V
Table 6–20. GTL I/O Specifications
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VTT
Termination voltage
1.14
1.2
1.26
V
VREF
Reference voltage
0.74
0.8
0.86
V
VIH
High-level input voltage
VREF +
0.05
V
VIL
Low-level input voltage
VREF –
0.05
V
VOL
Low-level output voltage
0.4
V
Table 6–21. SSTL-18 Class I Specifications (Part 1 of 2)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units
VCCIO
Output supply voltage
1.65
1.8
1.95
V
VREF
Reference voltage
0.8
0.9
1.0
V
VTT
Termination voltage
VREF – 0.04
VREF
VREF + 0.04
V
VIH(DC)
High-level DC input voltage
VREF +
0.125
V
Table 6–18. PCI-X Specifications (Part 2 of 2)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Units