ID 683181
Date 12/08/2023
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## Maximum Allowed Overshoot and Undershoot Voltage

During transitions, input signals may overshoot to the voltage listed in the following table and undershoot to –1.1 V for input currents less than 100 mA and periods shorter than 20 ns.

The maximum allowed overshoot duration is specified as a percentage of high time over the lifetime of the device. A DC signal is equivalent to 100% duty cycle.

For example, when using VCCIO = 1.8 V, a signal that overshoots to 2.44 V for LVDS I/O can only be at 2.44 V for ~6% over the lifetime of the device.

Table 4.  Maximum Allowed Overshoot During Transitions for Intel® Stratix® 10 Devices (for LVDS I/O)This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
Symbol Description LVDS I/O (V) 7 Overshoot Duration as % at TJ = 100°C Unit
Vi (AC) AC input voltage VCCIO + 0.30 100 %
VCCIO + 0.35 60 %
VCCIO + 0.40 30 %
VCCIO + 0.45 20 %
VCCIO + 0.50 10 %
VCCIO + 0.55 6 %
> VCCIO + 0.55 No overshoot allowed
Table 5.  Maximum Allowed Overshoot During Transitions for Intel® Stratix® 10 Devices (for 3 V I/O)This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
Symbol Description 3 V I/O (V) Overshoot Duration as % at TJ = 100°C Unit
Vi (AC) AC input voltage VCCIO + 0.65 100 %
VCCIO + 0.70 42 %
VCCIO + 0.75 18 %
VCCIO + 0.80 9 %
VCCIO + 0.85 4 %
> VCCIO + 0.85 No overshoot allowed
Table 6.  Maximum Allowed Overshoot During Transitions for Intel® Stratix® 10 Devices (for 3.3 V I/O)This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
Symbol Description 3.3 V I/O (V) Overshoot Duration as % at TJ = 100°C Unit
Vi (AC) AC input voltage VCCIO + 0.33 100 %
VCCIO + 0.41 60 %
VCCIO + 0.47 40 %
VCCIO + 0.69 10 %
VCCIO + 0.95 2 %
> VCCIO + 0.95 No overshoot allowed

For an overshoot of 2.5 V, the percentage of high time for the overshoot can be as high as 100% 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.

Figure 1.  Intel® Stratix® 10 Devices Overshoot Duration
7 The LVDS I/O values are applicable to all dedicated and dual-function configuration I/Os.