Operating Conditions
Table 5–6. Recommended Operating Conditions for User I/O Pins Using Single-Ended I/O Standards
Note (1) (Part 2 of 2)
VCCIO (V)
VREF (V)
VIL (V)
Max
VIH (V)
Min
I/O Standard
Min
Typ
Max
Min
Typ
Max
SSTL-18 class II
1.7
1.8
1.9
0.833
0.9
0.969 VREF – 0.125 (DC) VREF + 0.125 (DC)
VREF – 0.25 (AC) VREF + 0.25 (AC)
1.8-V HSTL
class I
1.71
1.71
1.8
1.8
1.5
1.5
1.89
1.89
0.85
0.85
0.71
0.71
0.9
0.9
0.95
0.95
0.79
0.79
VREF – 0.1 (DC)
VREF – 0.2 (AC)
VREF + 0.1 (DC)
VREF + 0.2 (AC)
1.8-V HSTL
class II
VREF – 0.1 (DC)
VREF – 0.2 (AC)
VREF + 0.1 (DC)
VREF + 0.2 (AC)
1.5-V HSTL
class I
1.425
1.425
1.575
1.575
0.75
0.75
VREF – 0.1 (DC)
VREF – 0.2 (AC)
VREF + 0.1 (DC)
VREF + 0.2 (AC)
1.5-V HSTL
class II
VREF – 0.1 (DC)
VREF – 0.2 (AC)
VREF + 0.1 (DC)
VREF + 0.2 (AC)
Note to Table 5–6:
(1) Nominal values (Nom) are for TA = 25° C, VCCINT = 1.2 V, and VCCIO = 1.5, 1.8, 2.5, and 3.3 V.
Table 5–7. DC Characteristics of User I/O Pins Using Single-Ended Standards Notes (1), (2) (Part 1 of 2)
Test Conditions Voltage Thresholds
I/O Standard
IOL (mA)
IOH (mA)
Maximum VOL (V)
Minimum VOH (V)
3.3-V LVTTL
4
0.1
1
–4
–0.1
–1
0.45
0.2
2.4
VCCIO – 0.2
2.0
3.3-V LVCMOS
2.5-V LVTTL and
LVCMOS
0.4
1.8-V LVTTL and
LVCMOS
2
2
–2
–2
0.45
VCCIO – 0.45
0.75 × VCCIO
1.5-V LVTTL and
LVCMOS
0.25 × VCCIO
PCI and PCI-X
1.5
8.1
16.4
6.7
13.4
8
–0.5
–8.1
–16.4
–6.7
–13.4
–8
0.1 × VCCIO
VTT – 0.57
0.9 × VCCIO
VTT + 0.57
SSTL-2 class I
SSTL-2 class II
SSTL-18 class I
SSTL-18 class II
1.8-V HSTL class I
1.8-V HSTL class II
V
TT – 0.76
VTT + 0.76
V
TT – 0.475
0.28
VTT + 0.475
VCCIO – 0.28
VCCIO – 0.4
VCCIO – 0.4
0.4
16
–16
0.4
5–6
Altera Corporation
February 2008
Cyclone II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
