Operating Conditions
Table 4–30. SSTL-2 Class II Specifications (Part 2 of 2)
Symbol
Parameter
Conditions
Minimum
VREF + 0.18
–0.3
Typical
Maximum Unit
VIH (DC)
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
VCCIO + 0.3
VREF – 0.18
V
V
V
V
V
V
V
V
V
IL (DC)
IH (AC)
IL (AC)
VREF + 0.35
VREF – 0.35
VTT – 0.76
VOH
VOL
IOH = –16.4 mA (1) VTT + 0.76
IOL = 16.4 mA (1)
Note to Table 4–30:
(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 4–31. SSTL-2 Class I & II Differential Specifications
Note (1)
Symbol
Parameter
Conditions
Minimum
Typical
Maximum
Unit
V
VCCIO
Output supply voltage
2.375
0.36
2.5
2.625
V
V
SWING (DC) DC differential input voltage
V
X (AC)
AC differential input cross
point voltage
(VCCIO/2) – 0.2
(VCCIO/2) + 0.2
V
V
SWING (AC) AC differential input voltage
0.7
V
V
VISO
Input clock signal offset
voltage
0.5 VCCIO
200
ΔVISO
Input clock signal offset
voltage variation
mV
V
VOX (AC)
AC differential output cross
point voltage
(VCCIO/2) – 0.2
(VCCIO/2) + 0.2
Note to Table 4–31:
(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 4–32. 1.2-V HSTL Specifications (Part 1 of 2)
Symbol
VCCIO
Parameter
Output supply voltage
Reference voltage
Conditions
Minimum
1.14
Typical
1.2
Maximum
1.26
Unit
V
VREF
0.48 VCCIO
VREF + 0.08
–0.15
0.5 VCCIO
0.52 VCCIO
VCCIO + 0.15
VREF – 0.08
VCCIO + 0.24
V
V
V
V
IH (DC) High-level DC input voltage
V
IL (DC) Low-level DC input voltage
IH (AC) High-level AC input voltage
V
VREF + 0.15
V
4–28
Altera Corporation
May 2008
Arria GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
