
VTT (V)
(Board Termination
Voltage)
VREF (V)
(Input Ref
Voltage)
VCCPD (V)
(Pre-Driver
Voltage)
VCCIO (V)
I/O Standard
Output
Input
(11)
1.25
—
2.5
VCCPD
Differential SSTL-2 Class
I
1.25
—
2.5
VCCPD
Differential SSTL-2 Class
II
0.9
—
2.5
1.8
VCCPD
Differential SSTL-18 Class
I
0.9
—
2.5
1.8
VCCPD
Differential SSTL-18 Class
II
0.75
—
2.5
1.5
VCCPD
Differential SSTL-15 Class
I
0.75
—
2.5
1.5
VCCPD
Differential SSTL-15 Class
II
0.9
—
2.5
1.8
VCCPD
Differential 1.8 V HSTL
Class I
0.9
—
2.5
1.8
VCCPD
Differential 1.8 V HSTL
Class II
0.75
—
2.5
1.5
VCCPD
Differential 1.5 V HSTL
Class I
0.75
—
2.5
1.5
VCCPD
Differential 1.5 V HSTL
Class II
0.6
—
2.5
1.2
VCCPD
Differential 1.2 V HSTL
Class I
0.6
—
2.5
1.2
VCCPD
Differential 1.2 V HSTL
Class II
—
2.5
VCCPD
LVDS
—
2.5
VCCPD
RSDS
—
2.5
VCCPD
Mini-LVDS
—
2.5
—
VCCPD
LVPECL (Differential
clock input only)
—
2.5
—
VCCPD
SLVS (Input only)
—
2.5
—
VCCPD
Sub-LVDS (input only)
—
2.5
—
VCCPD
HiSpi (input only)
(11) Input buffers for the SSTL, HSTL, Differential SSTL, Differential HSTL, LVDS, RSDS, Mini-LVDS, LVPECL,
HSUL, and Differential HSUL are powered by VCCPD
Altera Corporation
I/O Features in Cyclone V Devices
5-9
I/O Standards Voltage Levels in Cyclone V Devices
CV-52005
2014.01.10