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EP3SE80 Datasheet(PDF) 12 Page - Altera Corporation

Part No. EP3SE80
Description  Stratix III Device Handbook, Volume 2
Download  341 Pages
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Maker  ALTERA [Altera Corporation]
Homepage  http://www.altera.com
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EP3SE80 Datasheet(HTML) 12 Page - Altera Corporation

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Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics
Electrical Characteristics
Stratix III Device Handbook, Volume 2
© July 2010
Altera Corporation
Sinusoidal Maximum Allowed Overshoot/Undershoot Voltage
During transitions, input signals may overshoot to the voltage listed in Table 1–2 and
undershoot to –2.0 V for input currents less than 100 mA and periods shorter than
20 ns.
Table 1–2 lists the maximum allowed input overshoot voltage and the 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 15.8% over the lifetime of the device; for a device lifetime
of 10 years, this is equivalent to 15.8% of ten years which is 18.96 months. Figure 1–1
shows how to determine the overshoot duration.
1 In the example shown in Figure 1–1, the overshoot voltage is shown in red and is
present at the Stratix III pin, up to 4.1 V. From Table 1–2, for an overshoot of up to 4.1
V, the percentage of high time for overshoot > 3.15 V can be as high as 46% over an
11.4-year period. The percentage of high time is calculated as (delta T/T) * 100. This
11.4-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 where the device
is in an idle state, lifetimes are increased.
V
CC_CLKIN
Differential clock input power supply (top and bottom I/O
banks only)
-0.5
3.75
V
V
CCBAT
Battery back-up power supply for design security volatile
key register
-0.5
3.75
V
V
I
DC Input voltage
-0.5
4.0
V
T
J
Operating junction temperature
-55
125
°C
I
OUT
DC output current, per pin
-25
40
mA
T
STG
Storage temperature (No bias)
-65
150
°C
Note to Table 1–1:
(1) Supply voltage specifications apply to voltage readings taken at the device pins, not the power supply.
Table 1–1. Absolute Maximum Ratings for Stratix III Devices (Note 1) (Part 2 of 2)
Symbol
Parameter
Minimum
Maximum
Unit
Figure 1–1. Overshoot Duration
3.0 V
3.15 V
4.1 V
T
ΔT


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