Operating Conditions
Table 4–31. CTT I/O Specifications
Symbol
Parameter
Conditions
Minimum
2.05
Typical
3.3
Maximum
3.6
Unit
V
VCCIO
TT/VREF
Output supply voltage
V
Termination and input
reference voltage
1.35
1.5
1.65
V
VIH
VIL
VOH
VOL
IO
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output voltage
VREF + 0.2
VREF + 0.4
–10
V
V
VREF – 0.2
IOH = –8 mA
IOL = 8 mA
V
VREF – 0.4
10
V
Output leakage current
GND ≤VOUT
≤
μA
(when output is high Z)
VCCIO
Table 4–32. Bus Hold Parameters
V
CCIO Level
Parameter
Conditions
Unit
1.5 V
1.8 V
Min Max
2.5 V
3.3 V
Min
Max
Min
Max
Min
Max
Low sustaining VIN > VIL
current
25
30
50
70
μA
μA
μA
μA
V
(maximum)
High sustaining VIN < VIH
-25
–30
–50
–70
current
(minimum)
Low overdrive
current
0 V < VIN
VCCIO
<
160
-160
1.0
200
300
–300
1.7
500
–500
2.0
High overdrive 0 V < VIN
<
–200
1.07
current
VCCIO
Bus-hold trip
point
0.5
0.68
0.7
0.8
4–16
Altera Corporation
July 2005
Stratix Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
