Chapter 6: I/O Features in Cyclone IV Devices 6–7
OCT Support
March 2016 Altera Corporation Cyclone IV Device Handbook,
Volume 1
Tab le 6 –2 lists the I/O standards that support impedance matching and series
termination.
Table 6–2. Cyclone IV Device I/O Features Support (Part 1 of 2)
I/O Standard
IOH/IOL Current Strength
Setting (mA)
(1)
,
(9)
R
S
OCT with
Calibration
Setting, Ohm ()
R
S
OCT Without
Calibration
Setting, Ohm ()
Cyclone
IV E I/O
Banks
Support
Cyclone
IV GX I/O
Banks
Support
Slew
Rate
Option
(6)
PCI-
clamp
Diode
Support
Column I/O Row I/O
Column
I/O
Row
I/O
(8)
Column
I/O
Row
I/O
(8)
3.3-V LVTTL 4,8 4,8 — — — —
1,2,3,4,
5,6,7,8
3,4,5,6,
7,8,9
— v
3.3-V LVCMOS 2 2 — — — — — v
3.0-V LVTTL 4,8,12,16 4,8,12,16 50,25 50,25 50,25 50,25
0,1,2
v
3.0-V LVCMOS 4,8,12,16 4,8,12,16 50,25 50,25 50,25 50,25 v
3.0-V PCI/PCI-X — — — — — — — v
2.5-V
LVTTL/LVCMOS
4,8,12,16 4,8,12,16 50,25 50,25 50,25 50,25
0,1,2
v
1.8-V
LVTTL/LVCMOS
2,4,6,8,10,12,1
6
2,4,6,8,10,12,1
6
50,25 50,25 50,25 50,25 —
1.5-V LVCMOS
2,4,6,8,10,12,1
6
2,4,6,8,10,12,1
6
50,25 50,25 50,25 50,25 —
1.2-V LVCMOS 2,4,6,8,10,12 2,4,6,8,10 50,25 50 50,25 50
4,5,6,7,
8
—
SSTL-2 Class I 8,12 8,12 50505050
3,4,5,6,
7,8,9
—
SSTL-2 Class II 16 16 25 25 25 25 —
SSTL-18 Class I 8,10,12 8,10,12 50 50 50 50 —
SSTL-18 Class II 12,16 12,16 25 25 25 25 —
HSTL-18 Class I 8,10,12 8,10,12 50 50 50 50 —
HSTL-18 Class II 16 16 25 25 25 25 —
HSTL-15 Class I 8,10,12 8,10,12 50 50 50 50 —
HSTL-15 Class II 16 16 25 25 25 25 —
HSTL-12 Class I 8,10,12 8,10 50 50 50 50
4,5,6,7,
8
—
HSTL-12 Class II 14 — 25 — 25 — 3,4,7,8 4,7,8 —
Differential SSTL-2
Class I
(2),
(7)
8,12 8,12 50 50 50 50
1,2,3,4,
5,6,7,8
3,4,5,6,
7,8
0,1,2
—
Differential SSTL-2
Class II
(2),
(7)
16 16 25 25 25 25 —
Differential SSTL-
18
(2),
(7)
8,10,12 — 50 — 50 — —
Differential HSTL-
18
(2),
(7)
8,10,12 — 50 — 50 — —
Differential HSTL-
15
(2),
(7)
8,10,12 — 50 — 50 — —
Differential HSTL-
12
(2),
(7)
8,10,12 — 50 — 50 — 3,4,7,8 4,7,8 —
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