EP2C8T144I8N Datasheet, PDF (284/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1

Supported I/O Standards
f
For information about the I/O standards supported for external memory
applications, refer to the External Memory Interfaces chapter in volume 1
of the Cyclone II Device Handbook.
Table 10–1. Cyclone II Supported I/O Standards and Constraints (Part 1 of 2)
I/O Standard
Type
3.3-V LVTTL and LVCMOS Single ended
2.5-V LVTTL and LVCMOS Single ended
1.8-V LVTTL and LVCMOS Single ended
1.5-V LVCMOS
Single ended
SSTL-2 class I
SSTL-2 class II
SSTL-18 class I
SSTL-18 class II
Voltage
referenced
Voltage
referenced
Voltage
referenced
Voltage
referenced
HSTL-18 class I
HSTL-18 class II
HSTL-15 class I
HSTL-15 class II
PCI and PCI-X (2)
Voltage
referenced
Voltage
referenced
Voltage
referenced
Voltage
referenced
Single ended
Differential SSTL-2 class I or Pseudo
class II
differential (3)
Differential SSTL-18 class I Pseudo
or class II
differential (3)
V_CCIO Level
Top and
Bottom I/O
Pins
Side I/O Pins
Input
Output
CLK,
DQS
User I/O
Pins
CLK,
DQS
PLL_OUT
User I/O
Pins
3.3 V/ 3.3 V
2.5 V
v
v
v
v
v
3.3 V/ 2.5 V
2.5 V
v
v
v
v
v
1.8 V/ 1.8 V
1.5 V
v
v
v
v
v
1.8 V/ 1.5 V
1.5 V
v
v
v
v
v
2.5 V 2.5 V _v
v
v
v
v
2.5 V 2.5 V _v
v
v
v
v
1.8 V 1.8 V _v
v
v
v
v
1.8 V 1.8 V _v
v
(1)
(1)
(1)
1.8 V 1.8 V _v
v
v
v
v
1.8 V 1.8 V _v
v
(1)
(1)
(1)
1.5 V 1.5 V _v
v
v
v
v
1.5 V 1.5 V _v
v
(1)
(1)
(1)
3.3 V 3.3 V —
—
v
v
v
(4) 2.5 V —
—
—
v
—
2.5 V (4) v
—
v
—
—
(5)
(5)
(4) 1.8 V —
—
v (6)
—
1.8 V (4) v
—
v
—
—
(5)
(5)
10–2
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2008