EP2C5F256C7N Datasheet, PDF (95/168 Pages) Altera Corporation – Section I. Cyclone II Device Family Data Sheet

DC Characteristics and Timing Specifications
Single-Ended I/O Standards
Tables 5–6 and 5–7 provide operating condition information when using
single-ended I/O standards with Cyclone II devices. Table 5–5 provides
descriptions for the voltage and current symbols used in Tables 5–6 and
5–7.
Table 5–5. Voltage and Current Symbol Definitions
Symbol
V_{C C I O}
V_{R E F}
V_{I L}
V_{I H}
V_{O L}
V_{O H}
I_{O L}
I_{O H}
V_{T T}
Definition
Supply voltage for single-ended inputs and for output drivers
Reference voltage for setting the input switching threshold
Input voltage that indicates a low logic level
Input voltage that indicates a high logic level
Output voltage that indicates a low logic level
Output voltage that indicates a high logic level
Output current condition under which V_{O L} is tested
Output current condition under which V_{O H} is tested
Voltage applied to a resistor termination as specified by
HSTL and SSTL standards
Table 5–6. Recommended Operating Conditions for User I/O Pins Using Single-Ended I/O Standards
Note (1) (Part 1 of 2)
I/O Standard
V_CCIO (V)
Min Typ Max
V_REF (V)
Min Typ Max
V_IL (V)
Max
V_IH (V)
Min
3.3-V LVTTL and 3.135 3.3 3.465 —
—
—
0.8
1.7
LVCMOS
2.5-V LVTTL and 2.375 2.5 2.625 —
—
—
0.7
1.7
LVCMOS
1.8-V LVTTL and 1.710 1.8 1.890 —
—
—
0.35 × V_{C C I O}
LVCMOS
0.65 × V_{C C I O}
1.5-V LVCMOS 1.425 1.5 1.575 —
—
—
0.35 × V_{C C I O}
0.65 × V_{C C I O}
PCI and PCI-X 3.000 3.3 3.600 —
—
—
0.3 × V_{C C I O}
0.5 × V_{C C I O}
SSTL-2 class I 2.375 2.5 2.625 1.19 1.25 1.31 V_{RE F} – 0.18 (DC) V_{R E F} + 0.18 (DC)
V_{R E F} – 0.35 (AC) V_{R E F} + 0.35 (AC)
SSTL-2 class II 2.375 2.5 2.625 1.19 1.25 1.31 V_{RE F} – 0.18 (DC) V_{R E F} + 0.18 (DC)
V_{R E F} – 0.35 (AC) V_{R E F} + 0.35 (AC)
SSTL-18 class I 1.7
1.8
1.9 0.833 0.9 0.969 V_{R E F} – 0.125 (DC) V_{R E F} + 0.125 (DC)
V_{R E F} – 0.25 (AC) V_{R E F} + 0.25 (AC)
Altera Corporation
February 2008
5–5
Cyclone II Device Handbook, Volume 1