ep3c120f780c8nes Altera Corporation, ep3c120f780c8nes Datasheet - Page 412

• Manufacturer Part Number: ep3c120f780c8nes
• Description: Cyclone Iii Device Family
• Manufacturer: Altera Corporation

Cyclone III Device Datasheet: DC & Switching Characteristics
Altera Corporation-Preliminary
March 2007
Maximum Allowed Overshoot/Undershoot Voltage
During transitions, input signals may overshoot to the voltage shown in
Table 1–2
for periods shorter than 20 ns.
Table 1–2
duration of the overshoot voltage as a percentage over the lifetime of the
device. The maximum allowed overshoot duration is specified as
percentage of high-time over the lifetime of the device.
A DC signal is equivalent to 100% duty cycle. For example, a signal that
overshoots to 4.2 V can only be at 4.2 V for 10.74% over the lifetime of the
device; for device lifetime of 10 years, this amounts to 10.74/10ths of a
year.
Table 1–2. Maximum Allowed Overshoot During Transitions
Symbol
Vi
and undershoot to -2.0 V for input currents less than 100
lists the maximum allowed input overshoot voltage and the
DC Input Voltage
Parameter
Condition
V
V
V
V
V
V
V
V
V
V
V
V
V
V
I
I
I
I
I
I
I
I
I
I
I
I
I
=3.95V
=4.05V
=4.10V
=4.15V
=4.20V
=4.25V
=4.30V
=4.35V
=4.40V
=4.45V
=4.50V
=4.60V
=4.70V
I
=4.0V
Overshoot Duration as
% of High Time
95.67
55.24
31.97
18.52
10.74
0.047
Cyclone III Handbook
6.23
3.62
1.22
0.71
0.41
0.14
100
2.1
μA
Unit
and
%
%
%
%
%
%
%
%
%
%
%
%
%
%
1–2