Chapter 1: Cyclone III Device Datasheet
Electrical Characteristics
1–11
Max
(1)
Table 1–14. Cyclone III Devices Single-Ended SSTL and HSTL I/O Reference Voltage Specifications
(2)
V
CCIO (V)
Typ
VREF (V)
Typ
VTT (V)
I/O
Standard
Min
Max
Min
Max
Min
Typ
SSTL-2
Class I, II
VREF
0.04
–
VREF
0.04
+
2.375 2.5 2.625
1.19
1.25
0.9
1.31
VREF
SSTL-18
Class I, II
VREF
0.04
–
VREF
0.04
+
1.7
1.8
1.8
1.9
0.833
0.85
0.71
0.969
0.95
0.79
VREF
0.9
HSTL-18
Class I, II
1.71
1.89
0.9
0.85
0.71
0.95
0.79
HSTL-15
Class I, II
1.425 1.5 1.575
0.75
0.75
(3)
(4)
(3)
(4)
(3)
(4)
0.48 * VCCIO
0.47 * VCCIO
0.5 * VCCIO
0.5 * VCCIO
0.52 * VCCIO
0.53 * VCCIO
HSTL-12
Class I, II
0.5 *
VCCIO
1.14
1.2
1.26
—
—
Notes to Table 1–14:
(1) For an explanation of terms used in Table 1–14, refer to “Glossary” on page 1–27.
(2) VTT of 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 1–15. Cyclone III Devices Single-Ended SSTL and HSTL I/O Standards Signal Specifications
VIL(DC) (V)
Min Max
VREF
VIH(DC) (V)
Max
VIL(AC) (V)
Min Max
VREF
VIH(AC) (V)
Min Max
VOL (V)
Max
VOH (V)
Min
I/O
IOL
IOH
Standard
(mA) (mA)
Min
SSTL-2
Class I
–
VREF
0.18
+
–
VREF
0.35
+
VTT
–
VTT
+
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
8.1
16.4 –16.4
6.7 –6.7
13.4 –13.4
–8.1
0.18
0.35
0.57
0.57
SSTL-2
Class II
VREF
0.18
–
VREF
0.18
+
VREF
–
VREF
0.35
+
VTT
–
VTT
+
—
0.35
0.76
0.76
SSTL-18
Class I
VREF
0.125
–
VREF
+
VREF
–
VREF
0.25
+
VTT
–
VTT +
0.475
—
0.125
0.25
0.475
SSTL-18
Class II
VREF
0.125
–
VREF
+
VREF
–
VREF
0.25
+
VCCIO
–
—
0.28
0.4
0.4
0.4
0.4
0.125
0.25
0.28
HSTL-18
Class I
VREF
0.1
–
–
–
–
–
VREF
0.1
+
+
+
+
+
VREF
0.2
–
VREF
0.2
+
VCCIO
0.4
–
—
8
16
8
–8
–16
–8
HSTL-18
Class II
VREF
0.1
VREF
0.1
VREF
0.2
–
–
–
–
VREF
0.2
+
+
+
+
VCCIO
0.4
–
–
–
—
HSTL-15
Class I
VREF
0.1
VREF
0.1
VREF
0.2
VREF
0.2
VCCIO
0.4
—
HSTL-15
Class II
VREF
0.1
VREF
0.1
VREF
0.2
VREF
0.2
VCCIO
0.4
—
16
8
–16
–8
HSTL-12
Class I
VREF
0.08
VREF
0.08
VREF
VREF
VCCIO
+
+
0.25 ×
VCCIO
0.75 ×
VCCIO
–0.15
–0.15
V
V
CCIO + 0.15 –0.24
CCIO + 0.15 –0.24
0.15
0.15
0.24
HSTL-12
Class II
VREF
0.08
–
VREF
0.08
+
VREF
–
VREF
+
VCCIO
0.24
0.25 ×
VCCIO
0.75 ×
VCCIO
14
–14
0.15
0.15
July 2012 Altera Corporation
Cyclone III Device Handbook
Volume 2
ALTERA [ ALTERA CORPORATION ]
