
2–86
Altera Corporation
Stratix II Device Handbook, Volume 1
May 2007
I/O Structure
■
1.5-V HSTL Class I and II
■
1.8-V HSTL Class I and II
■
1.2-V HSTL
■
SSTL-2 Class I and II
■
SSTL-18 Class I and II
Table 2–16 describes the I/O standards supported by Stratix II devices.
Table 2–16. Stratix II Supported I/O Standards (Part 1 of 2)
I/O Standard
Type
Input Reference
Voltage (VREF) (V)
Output Supply
Voltage (VCCIO) (V)
Board Termination
Voltage (VTT) (V)
LVTTL
Single-ended
-
3.3
-
LVCMOS
Single-ended
-
3.3
-
2.5 V
Single-ended
-
2.5
-
1.8 V
Single-ended
-
1.8
-
1.5-V LVCMOS
Single-ended
-
1.5
-
3.3-V PCI
Single-ended
-
3.3
-
3.3-V PCI-X mode 1
Single-ended
-
3.3
-
LVDS
Differential
-
-
Differential
-
3.3
-
HyperTransport technology Differential
-
2.5
-
Differential 1.5-V HSTL
Differential
0.75
1.5
0.75
Differential 1.8-V HSTL
Differential
0.90
1.8
0.90
Differential SSTL-18 Class
Differential
0.90
1.8
0.90
Differential SSTL-2 Class I
Differential
1.25
2.5
1.25
Voltage-referenced
0.6
1.2
0.6
1.5-V HSTL Class I and II
Voltage-referenced
0.75
1.5
0.75
1.8-V HSTL Class I and II
Voltage-referenced
0.9
1.8
0.9
SSTL-18 Class I and II
Voltage-referenced
0.90
1.8
0.90