|
EP3C5_1 Datasheet, PDF (3/34 Pages) Altera Corporation – Cyclone III Device Data Sheet | |||
|
◁ |
Chapter 1: Cyclone III Device Data Sheet
1â3
Electrical Characteristics
Table 1â2. Cyclone III Devices Maximum Allowed Overshoot During Transitions over a 10-Year Time
Frame (Note 1)
Symbol Parameter
Condition
Overshoot Duration as % of High Time Unit
VI = 3.95 V
100
%
VI = 4.0 V
95.67
%
VI = 4.05 V
55.24
%
VI = 4.10 V
31.97
%
VI = 4.15 V
18.52
%
VI = 4.20 V
10.74
%
Vi
AC Input
Voltage
VI = 4.25 V
VI = 4.30 V
6.23
%
3.62
%
VI = 4.35 V
2.1
%
VI = 4.40 V
1.22
%
VI = 4.45 V
0.71
%
VI = 4.50 V
0.41
%
VI = 4.60 V
0.14
%
VI = 4.70 V
0.047
%
Note to Table 1â2:
(1) Figure 1â1 shows the methodology to determine the overshoot duration. In the example in Figure 1â1, overshoot
voltage is shown in red and is present on the input pin of the Cyclone III device at over 4.1 V but below 4.2 V. From
Table 1â1, for an overshoot of 4.1 V, the percentage of high time for the overshoot can be as high as 31.97% over
a 10-year period. Percentage of high time is calculated as ([delta T]/T) Ã 100. This 10-year period assumes the
device is always turned on with 100% I/O toggle rate and 50% duty cycle signal. For lower I/O toggle rates and
situations in which the device is in an idle state, lifetimes are increased.
© January 2010 Altera Corporation
Cyclone III Device Handbook, Volume 2
|
▷ |