Maximum Allowed Overshoot and Undershoot Voltage
During transitions, input signals may overshoot to the voltage listed in the following table and undershoot to –2.0 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, a signal that overshoots to 2.70 V for LVDS I/O can only be at 2.70 V for ~4% over the lifetime of the device.
|Symbol||Description||Condition (V)||Overshoot Duration as % at TJ = 100°C||Unit|
|LVDS I/O 7||3 V I/O|
|Vi (AC)||AC input voltage||2.50||3.80||100||%|
|> 2.70||> 4.00||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.
Did you find the information on this page useful?