VTT (V)
(Board Termination
Voltage)
VREF (V)
(Input Ref
Voltage)
VCCPD (V)
(Pre-Driver
Voltage)
VCCIO (V)
I/O Standard
Output
Input
(11)
Typically does not
require board
termination
0.75
2.5
1.5
VCCPD
SSTL-15
0.675
2.5
1.35
VCCPD
SSTL-135
0.625
2.5
1.25
VCCPD
SSTL-125
0.6
2.5
1.2
VCCPD
HSUL-12
Typically does not
require board
termination
—
2.5
1.5
VCCPD
Differential SSTL-15
—
2.5
1.35
VCCPD
Differential SSTL-135
—
2.5
1.25
VCCPD
Differential SSTL-125
—
2.5
1.2
VCCPD
Differential HSUL-12
Related Information
MultiVolt I/O Interface in Cyclone V Devices
The MultiVolt I/O interface feature allows Cyclone V devices in all packages to interface with systems of
different supply voltages.
Table 5-10: MultiVolt I/O Support in Cyclone V Devices
Output Signal (V)
Input Signal (V)
VCCPD (V)
VCCIO (V)
1.2
2.5
1.2
1.25
2.5
1.25
1.35
2.5
1.35
1.5
1.5, 1.8
2.5
1.5
1.8
1.5, 1.8
2.5
1.8
2.5
2.5, 3.0, 3.3
2.5
3.0
2.5, 3.0, 3.3
3.0
3.3
2.5, 3.0, 3.3
3.3
The pin current may be slightly higher than the default value. Verify that the VOL maximum and VOH
minimum voltages of the driving device do not violate the applicable VIL maximum and VIH minimum
voltage specifications of the Cyclone V device.
(11) Input buffers for the SSTL, HSTL, Differential SSTL, Differential HSTL, LVDS, RSDS, Mini-LVDS, LVPECL,
HSUL, and Differential HSUL are powered by VCCPD
I/O Features in Cyclone V Devices
Altera Corporation
CV-52005
MultiVolt I/O Interface in Cyclone V Devices
5-10
2014.01.10