DC and Switching Characteristics
Table 4–37. 1.8-V HSTL Class II Specifications
Symbol
VCCIO
VREF
Parameter
Conditions
Minimum
1.71
Typical
1.80
Maximum Unit
Output supply voltage
Input reference voltage
Termination voltage
1.89
0.95
0.95
V
V
V
V
V
V
V
V
V
0.85
0.90
VTT
0.85
0.90
V
V
V
V
IH (DC)
IL (DC)
IH (AC)
IL (AC)
DC high-level input voltage
DC low-level input voltage
AC high-level input voltage
AC low-level input voltage
High-level output voltage
Low-level output voltage
VREF + 0.1
–0.3
VREF – 0.1
VREF – 0.2
0.4
VREF + 0.2
VOH
VOL
IOH = 16 mA (1)
IOH = –16 mA (1)
VCCIO – 0.4
Note to Table 4–37:
(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 4–38. 1.8-V HSTL Class I & II Differential Specifications
Symbol
Parameter
Conditions
Minimum
1.71
Typical
Maximum Unit
VCCIO
I/O supply voltage
1.80
1.89
V
V
V
V
V
DIF (DC) DC input differential voltage
0.2
CM (DC) DC common mode input
voltage
0.78
1.12
V
V
DIF (AC) AC differential input voltage
0.4
V
V
OX (AC) AC differential cross point
voltage
0.68
0.9
Altera Corporation
May 2008
4–31
Arria GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
