Operating Conditions
Table 4–26. SSTL-18 Class I Specifications
Symbol
VCCIO
VREF
Parameter
Conditions
Minimum
1.71
Typical
1.8
Maximum Unit
Output supply voltage
Reference voltage
1.89
0.945
V
V
V
V
V
V
V
V
V
0.855
0.9
VTT
Termination voltage
VREF – 0.04
VREF + 0.125
VREF
VREF + 0.04
V
V
V
V
IH (DC)
IL (DC)
IH (AC)
IL (AC)
High-level DC input voltage
Low-level DC input voltage
High-level AC input voltage
Low-level AC input voltage
High-level output voltage
Low-level output voltage
VREF – 0.125
VREF – 0.25
VTT – 0.475
VREF + 0.25
VTT + 0.475
VOH
VOL
IOH = –6.7 mA (1)
IOL = 6.7 mA (1)
Note to Table 4–26:
(1) This specification is supported across all the programmable drive settings available for this I/O standard as shown
in the Arria GX Architecture chapter in volume 1 of the Arria GX Device Handbook.
Table 4–27. SSTL-18 Class II Specifications
Symbol
VCCIO
VREF
Parameter
Output supply voltage
Reference voltage
Termination voltage
Conditions
Minimum
1.71
Typical
1.8
Maximum Unit
1.89
0.945
V
V
V
V
V
V
V
V
V
0.855
0.9
VTT
VREF – 0.04
VREF + 0.125
VREF
VREF + 0.04
V
V
V
V
IH (DC) High-level DC input voltage
IL (DC) Low-level DC input voltage
IH (AC) High-level AC input voltage
IL (AC) Low-level AC input voltage
VREF – 0.125
VREF – 0.25
0.28
VREF + 0.25
VOH
VOL
High-level output voltage
Low-level output voltage
IOH = –13.4 mA (1) VCCIO – 0.28
IOL = 13.4 mA (1)
Note to Table 4–27:
(1) This specification is supported across all the programmable drive settings available for this I/O standard as shown
in the Arria GX Architecture chapter in volume 1 of the Arria GX Device Handbook.
4–26
Altera Corporation
May 2008
Arria GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
