Visible to Intel only — GUID: eqy1492145439298
Ixiasoft
Visible to Intel only — GUID: eqy1492145439298
Ixiasoft
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.
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 | — |
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 | — |
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.