DC Characteristics for Different Pin Types
Table 5–11 specifies the bus hold parameters for general I/O pins.
Table 5–11. Bus Hold Parameters
Note (1)
VCCIO Level
2.5 V
Parameter
Conditions
Unit
1.8 V
3.3 V
Min
Max
Min
Max
Min
Max
Bus-hold low, sustaining
current
VIN
>
30
—
50
—
70
—
μA
μA
VIL(maximum)
Bus-hold high, sustaining
current
VIN
<
–30
—
–50
—
–70
—
VIL(minimum)
Bus-hold low, overdrive
current
0 V < VIN < VCCIO
—
—
200
–200
1.07
—
—
300
–300
1.7
—
—
500
–500
2.0
μA
μA
V
Bus-hold high, overdrive
current
0 V < VIN < VCCIO
—
Bus-hold trip point (2)
0.68
0.7
0.8
Notes to Table 5–11:
(1) There is no specification for bus-hold at VCCIO = 1.5 V for the HSTL I/O standard.
(2) The bus-hold trip points are based on calculated input voltages from the JEDEC standard.
On-Chip Termination Specifications
Table 5–12 defines the specifications for internal termination resistance
tolerance when using series or differential on-chip termination.
Table 5–12. Series On-Chip Termination Specifications
Resistance Tolerance
Extended/
Symbol
Description
Conditions
Commercial Industrial
Automotive Unit
Temp Max
Max
Max
25-Ω RS
50-Ω RS
50-Ω RS
Internal series termination without VCCIO = 3.3V
calibration (25-Ω setting)
30
30
40
40
50
%
%
%
Internal series termination without VCCIO = 2.5V
calibration (50-Ω setting)
30
30
40
Internal series termination without VCCIO = 1.8V
calibration (50-Ω setting)
30 (1)
Note to Table 5–12:
(1) For commercial –8 devices, the tolerance is 40%.
5–12
Altera Corporation
February 2008
Cyclone II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
