ID 683251
Date 10/31/2022
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## Maximum Allowed Overshoot or Undershoot Voltage

During transitions, input signals may overshoot to the voltage shown in the following table and undershoot to –2.0 V for a magnitude of currents less than 100 mA and for periods shorter than 20 ns. The following table 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 a percentage of high-time over the lifetime of the device.
Note: A DC signal is equivalent to 100% duty cycle. For example, a signal that overshoots to 4.3 V can only be at 4.3 V for 65% over the lifetime of the device; for a device lifetime of 10 years, this amounts to 65/10ths of a year.
Table 2.   Maximum Allowed Overshoot During Transitions over a 10-Year Time Frame for Intel® Cyclone® 10 LP Devices
Symbol Parameter Condition (V) Overshoot Duration as % of High Time Unit
Vi AC Input Voltage VI = 4.20 100 %
VI = 4.25 98 %
VI = 4.30 65 %
VI = 4.35 43 %
VI = 4.40 29 %
VI = 4.45 20 %
VI = 4.50 13 %
VI = 4.55 9 %
VI = 4.60 6 %

In the following figure, the overshoot voltage is shown in red and is present on the input pin of the Intel® Cyclone® 10 LP device at over 4.3 V but below 4.4 V. For example, for an overshoot of 4.3 V, the percentage of high time for the overshoot can be as high as 65% over a 10-year period. Percentage of high time is calculated as ([delta T]/T) × 100. This 10-year period assumes that 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.

Figure 1.  Intel® Cyclone® 10 LP Devices Overshoot Duration