EP2S90F1020C4N Datasheet, PDF (147/238 Pages) Altera Corporation – The Stratix II family offers the following features

DC & Switching Characteristics
Table 5–17. SSTL-18 Class II Specifications
Symbol
Parameter
Conditions
Minimum
Typical Maximum Unit
V_CCIO Output supply voltage
V_REF
Reference voltage
V_TT
Termination voltage
V_IH (DC) High-level DC input voltage
V_IL (DC) Low-level DC input voltage
V_IH (AC) High-level AC input voltage
V_IL (AC) Low-level AC input voltage
V_OH
High-level output voltage
V_OL
Low-level output voltage
I_OH = –13.4 mA (1)
I_OL = 13.4 mA (1)
1.71
0.855
V_REF – 0.04
V_REF + 0.125
V_REF + 0.25
V_CCIO – 0.28
1.80
0.900
V_REF
1.89
V
0.945
V
V_REF + 0.04 V
V
V_REF – 0.125 V
V
V_REF – 0.25 V
V
0.28
V
Note to Table 5–17:
(1) This specification is supported across all the programmable drive settings available for this I/O standard as shown
in the Stratix II Architecture chapter in volume 1 of the Stratix II Device Handbook.
Table 5–18. SSTL-18 Class I & II Differential Specifications
Symbol
Parameter
Conditions Minimum
Typical
V_CCIO Output supply voltage
V_SWING DC differential input voltage
(DC)
V_X (AC) AC differential input cross
point voltage
V_SWING AC differential input voltage
(AC)
V_ISO
Input clock signal offset
voltage
ΔV_ISO
Input clock signal offset
voltage variation
V_OX
(AC)
AC differential cross point
voltage
1.71
1.80
0.25
(V_CCIO/2) – 0.175
0.5
0.5 × V_CCIO
±200
(V_CCIO/2) – 0.125
Maximum Unit
1.89
V
V
(V_CCIO/2) + 0.175 V
V
V
mV
(V_CCIO/2) + 0.125 V
Altera Corporation
April 2011
5–11
Stratix II Device Handbook, Volume 1