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EP3SE80F780I4N Datasheet, PDF (12/341 Pages) Altera Corporation – Chapter Revision Dates | |||
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1â2
Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics
Electrical Characteristics
Table 1â1. Absolute Maximum Ratings for Stratix III Devices (Note 1) (Part 2 of 2)
Symbol
Parameter
Minimum
VCC_CLKIN
Differential clock input power supply (top and bottom I/O
banks only)
-0.5
VCCBAT
Battery back-up power supply for design security volatile
key register
-0.5
VI
DC Input voltage
-0.5
TJ
Operating junction temperature
-55
IOUT
DC output current, per pin
-25
TSTG
Storage temperature (No bias)
-65
Note to Table 1â1:
(1) Supply voltage specifications apply to voltage readings taken at the device pins, not the power supply.
Maximum Unit
3.75
V
3.75
V
4.0
V
125
°C
40
mA
150
°C
Sinusoidal Maximum Allowed Overshoot/Undershoot Voltage
During transitions, input signals may overshoot to the voltage listed in Table 1â2 and
undershoot to â2.0 V for input currents less than 100 mA and periods shorter than
20 ns.
Table 1â2 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 1â1
shows how to determine the overshoot duration.
Figure 1â1. Overshoot Duration
4.1 V
3.15 V
3.0 V
ÎT
T
1 In the example shown in Figure 1â1, the overshoot voltage is shown in red and is
present at the Stratix III pin, up to 4.1 V. From Table 1â2, 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.
Stratix III Device Handbook, Volume 2
© July 2010 Altera Corporation
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