1–12
Chapter 1: Cyclone III Device Data Sheet
Electrical Characteristics
Table 1–14. Cyclone III Devices Single-Ended SSTL and HSTL I/O Reference Voltage Specifications (Note 1)
V
CCIO (V)
VREF (V)
Typ
VTT (V) (Note 2)
I/O
Standard
Min
Typ
Max
Min
Max
Min
Typ
Max
SSTL-2
Class I, II
2.375 2.5 2.625
1.19
1.25
0.9
1.31
V
V
REF – 0.04
REF – 0.04
0.85
VREF
VREF
VREF + 0.04
SSTL-18
Class I, II
1.7
1.8
1.8
1.9
0.833
0.85
0.969
0.95
VREF + 0.04
0.95
HSTL-18
Class I, II
1.71
1.89
0.9
0.9
HSTL-15
Class I, II
1.425 1.5 1.575
0.71
0.75
0.79
0.71
0.75
0.79
0.48 * VCCIO (3) 0.5 * VCCIO (3)
0.47 * VCCIO (4) 0.5 * VCCIO (4)
0.52 * VCCIO (3)
0.53 * VCCIO (4)
HSTL-12
Class I, II
1.14
1.2
1.26
—
0.5 * VCCIO
—
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
V
IL(DC) (V)
Max
VREF
VIH(DC) (V)
Max
VIL(AC) (V)
VIH(AC) (V)
Max
VOL (V)
VOH (V)
Min
I/O
IOL
IOH
Standard
(mA) (mA)
Min
Min
Min
Max
VREF
0.35
Min
Max
SSTL-2
Class I
–
VREF
+
–
VREF
+
VTT –
0.57
VTT +
0.57
—
—
—
—
—
—
—
—
—
—
—
—
8.1
–8.1
0.18
0.18
0.35
SSTL-2
Class II
VREF
–
VREF
+
VREF
0.35
–
VREF
+
VTT –
0.76
—
—
—
—
—
—
—
—
VTT +0.76 16.4 –16.4
0.18
0.18
0.35
SSTL-18
Class I
VREF
–
VREF
+
VREF
0.25
–
VREF
+
VTT –
0.475
VTT +
—
—
—
6.7
–6.7
0.125
0.125
0.25
0.475
VCCIO
0.28
SSTL-18
Class II
VREF
–
VREF
+
VREF
0.25
–
VREF
+
–
—
0.28
0.4
0.4
0.4
0.4
13.4 –13.4
0.125
0.125
0.25
HSTL-18
Class I
VREF
0.1
–
–
VREF
0.1
+
+
VREF
0.2
–
VREF
+
—
—
V
CCIO – 0.4
8
16
8
–8
–16
–8
0.2
HSTL-18
Class II
VREF
VREF
VREF
0.2
–
–
VREF
+
VCCIO
0.4
–
–
–
—
—
0.1
0.1
0.2
HSTL-15
Class I
VREF
–
VREF
+
VREF
0.2
VREF
+
VCCIO
0.4
—
—
0.1
0.1
0.2
HSTL-15
Class II
VREF
–
VREF
+
VREF
0.2
–
VREF
+
VCCIO
0.4
—
—
16
8
–16
–8
0.1
0.1
0.2
HSTL-12
Class I
VREF
–
VREF
+
VREF
0.15
–
VREF
+
0.25 ×
VCCIO
0.75 ×
VCCIO
–0.15
–0.15
VCCIO + 0.15 –0.24
V
V
CCIO + 0.24
CCIO + 0.24
0.08
0.08
0.15
HSTL-12
Class II
VREF
–
VREF
+
VREF
0.15
–
VREF
+
0.25 ×
VCCIO
0.75 ×
VCCIO
VCCIO + 0.15 –0.24
14
–14
0.08
0.08
0.15
f
For more illustrations of receiver input and transmitter output waveforms, and for
other differential I/O standards, refer to the High-Speed Differential Interfaces in
Cyclone III Devices chapter.
Cyclone III Device Handbook, Volume 2
© January 2010 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
