Chapter 1: Cyclone IV Device Datasheet
1–13
Operating Conditions
December 2013
Altera Corporation
Table 1–16. Single
-Ended SSTL and HSTL I/O Reference Voltage Specifications for Cyclone IV
Devices (1)I/O
Standard
VCCIO (V)
VREF (V)
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
SSTL
-2
Class I, II
2.375
2.5
2.625
1.19
1.25
1.31
VREF –
0.04
VREF
VREF +
0.04
SSTL
-18
Class I, II
1.7
1.8
1.9
0.833
0.9
0.969
VREF –
0.04
VREF
VREF +
0.04
HSTL
-18
Class I, II
1.71
1.8
1.89
0.85
0.9
0.95
0.85
0.9
0.95
HSTL
-15
Class I, II
1.425
1.5
1.575
0.71
0.75
0.79
0.71
0.75
0.79
HSTL
-12
Class I, II
1.14
1.2
1.26
—
0.5 x
VCCIO
—
(2) VTT of the transmitting device must track VREF of the receiving device.
(3) Value shown refers to DC input reference voltage, VREF(DC).
(4) Value shown refers to AC input reference voltage, VREF(AC).
Table 1–17. Single
-Ended SSTL and HSTL I/O Standards Signal Specifications for Cyclone IV Devices
I/O
Standard
VIL(DC) (V)
VIH(DC) (V)
VIL(AC) (V)
VIH(AC) (V)
VOL (V)
VOH (V)
IOL
(mA)
IOH
(mA)
Min
Max
Min
Max
Min
Max
Min
Max
Min
SSTL
-2
Class I
—
VREF –
0.18
VREF +
0.18
——
VREF –
0.35
VREF +
0.35
—
VTT –
0.57
VTT +
0.57
8.1
–8.1
SSTL
-2
Class II
—
VREF –
0.18
VREF +
0.18
——
VREF –
0.35
VREF +
0.35
—
VTT –
0.76
VTT +
0.76
16.4
–16.4
SSTL
-18
Class I
—
VREF –
0.125
VREF +
0.125
——
VREF –
0.25
VREF +
0.25
—
VTT –
0.475
VTT +
0.475
6.7
–6.7
SSTL
-18
Class II
—
VREF –
0.125
VREF +
0.125
——
VREF –
0.25
VREF +
0.25
—0.28
VCCIO –
0.28
13.4
–13.4
HSTL
-18
Class I
—
VREF –
0.1
VREF +
0.1
——
VREF –
0.2
VREF +
0.2
—0.4
VCCIO –
0.4
8–8
HSTL
-18
Class II
—
VREF –
0.1
VREF +
0.1
——
VREF –
0.2
VREF +
0.2
—0.4
VCCIO –
0.4
16
–16
HSTL
-15
Class I
VREF –
0.1
VREF +
0.1
——
VREF –
0.2
VREF +
0.2
—0.4
VCCIO –
0.4
8–8
HSTL
-15
Class II
—
VREF –
0.1
VREF +
0.1
——
VREF –
0.2
VREF +
0.2
—0.4
VCCIO –
0.4
16
–16
HSTL
-12
Class I
–0.15
VREF –
0.08
VREF +
0.08
VCCIO + 0.15 –0.24
VREF –
0.15
VREF +
0.15
VCCIO +
0.24
0.25 ×
VCCIO
0.75 ×
VCCIO
8–8
HSTL
-12
Class II
–0.15
VREF –
0.08
VREF +
0.08
VCCIO + 0.15 –0.24
VREF –
0.15
VREF +
0.15
VCCIO +
0.24
0.25 ×
VCCIO
0.75 ×
VCCIO
14
–14