
4–36
Altera Corporation
Stratix Device Handbook, Volume 2
June 2006
I/O Pad Placement Guidelines
Table 4–12 shows the DC current specification per pin for each I/O
standard. I/O standards not shown in the table do not exceed these
current limitations.
f
For more information on Altera device packaging, see the Package
Information for Stratix Devices chapter in the Stratix Device Handbook,
Volume 2.
Table 4–12. I/O Standard DC Specification Note (1) Pin I/O Standard
IPIN (mA)
3.3-V VCCIO
2.5-V VCCIO
1.5-V VCCIO
GTL
40
-
GTL+
34
-
SSTL-3 Class I
8
-
SSTL-3 Class II
16
-
CTT
8
-
SSTL-2 Class I
-
8.1
-
SSTL-2 Class II
-
16.4
-
HSTL Class I
-
8
HSTL Class II
-
16
(1)
The current rating on a VREF pin is less than 10μA.
Σ
pin + 9
pin
Ipin < 164 mA