During transitions, the toggling input data or clock signals may overshoot to the voltage listed in the following tables and undershoot to the following limits for input currents less than 100 mA and periods shorter than 20 ns.
- Undershoot limit of –1.1 V when using VCCIO_HPS or VCCIO_SDM of 1.8 V.
- Undershoot limit of –0.3 V when using VCCIO_PIO of 1.3 V, 1.2 V , 1.1 V, and 1.05 V.
No overshooting beyond 1.602 V and undershooting below 0.273 V is allowed when using True Differential Signaling I/O standard at VCCIO_PIO = 1.3 V.
No overshooting beyond 1.177 V and undershooting below 0.573 V is allowed when using True Differential Signaling I/O standard at VCCIO_PIO = 1.2 V, 1.1 V, and 1.05 V.
The maximum allowed overshoot duration is specified as a percentage of high time (calculated as ([delta T]/T) × 100) over the lifetime of the device. A DC signal is equivalent to 100% duty cycle.
Table 4. Maximum Allowed Overshoot During Transitions (for 1.05 V I/O in GPIO-B Bank) This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
For specification status, see the Data Sheet Status table
Symbol |
Description |
Condition (V) |
Overshoot Duration as % at TJ = 100°C |
Unit |
Vi (AC) |
AC input voltage |
VCCIO_PIO + 0.25 |
100 |
% |
VCCIO_PIO + 0.309 |
30 |
% |
VCCIO_PIO + 0.35 |
4 |
% |
> VCCIO_PIO + 0.40 |
No Overshoot Allowed |
% |
Table 5. Maximum Allowed Overshoot During Transitions (for 1.1 V I/O in GPIO-B Bank) This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
For specification status, see the Data Sheet Status table
Symbol |
Description |
Condition (V) |
Overshoot Duration as % at TJ = 100°C |
Unit |
Vi (AC) |
AC input voltage |
VCCIO_PIO + 0.25 |
100 |
% |
VCCIO_PIO + 0.3010 |
30 |
% |
VCCIO_PIO + 0.35 |
4 |
% |
> VCCIO_PIO + 0.40 |
No Overshoot Allowed |
% |
Table 6. Maximum Allowed Overshoot During Transitions (for 1.2 V I/O in GPIO-B Bank) This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
For specification status, see the Data Sheet Status table
Symbol |
Description |
Condition (V) |
Overshoot Duration as % at TJ = 100°C |
Unit |
Vi (AC) |
AC input voltage |
VCCIO_PIO + 0.25 |
100 |
% |
VCCIO_PIO + 0.3011 |
30 |
% |
VCCIO_PIO + 0.35 |
4 |
% |
> VCCIO_PIO + 0.40 |
No Overshoot Allowed |
% |
Table 7. Maximum Allowed Overshoot During Transitions (for 1.3 V I/O in GPIO-B Bank) This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
For specification status, see the Data Sheet Status table
Symbol |
Description |
Condition (V) |
Overshoot Duration as % at TJ = 100°C |
Unit |
Vi (AC) |
AC input voltage |
VCCIO_PIO + 0.25 |
100 |
% |
VCCIO_PIO + 0.3012 |
65 |
% |
VCCIO_PIO + 0.35 |
7 |
% |
> VCCIO_PIO + 0.40 |
No Overshoot Allowed |
% |
Table 8. Maximum Allowed Overshoot During Transitions (for 1.8 V I/O in HPS and SDM I/O Banks) This table lists the maximum allowed input overshoot voltage and the duration of the overshoot voltage as a percentage of device lifetime.
For specification status, see the Data Sheet Status table
Symbol |
Description |
Condition (V) |
Overshoot Duration as % at TJ = 100°C |
Unit |
Vi (AC) |
AC input voltage |
VCCIO_SDM + 0.30, VCCIO_HPS + 0.30 |
100 |
% |
VCCIO_SDM + 0.35, VCCIO_HPS + 0.35 |
60 |
% |
VCCIO_SDM + 0.40, VCCIO_HPS + 0.40 |
30 |
% |
VCCIO_SDM + 0.45, VCCIO_HPS + 0.45 |
20 |
% |
VCCIO_SDM + 0.50, VCCIO_HPS + 0.50 |
10 |
% |
VCCIO_SDM + 0.55, VCCIO_HPS + 0.55 |
6 |
% |
> VCCIO_SDM + 0.55, > VCCIO_HPS + 0.55 |
No Overshoot Allowed |
% |
For example, when using 1.2 V I/O standard with 1.26 V VCCIO_PIO, a signal that overshoots to 1.61 V can only be at 1.61 V for ~4% over the lifetime of the device. For an overshoot of 1.51 V, the percentage of high time for the overshoot can be as high as 100% over the lifetime of the device.
Figure 1. Overshoot Duration Example (for 1.2 V GPIO-B Bank at VCCIO_PIO = 1.26 V)
9 For LVCMOS pin utilization of equal to or less than 25 pins within a bank, the V
i (AC) for the LVCMOS input can go up to V
CCIO_PIO + 0.3 V at an overshoot duration of 100%.
10 For LVCMOS pin utilization of equal to or less than 25 pins within a bank, the V
i (AC) for the LVCMOS input can go up to V
CCIO_PIO + 0.3 V at an overshoot duration of 100%.
11 For LVCMOS pin utilization of equal to or less than 25 pins within a bank, the V
i (AC) for the LVCMOS input can go up to V
CCIO_PIO + 0.3 V at an overshoot duration of 100%.
12 For LVCMOS pin utilization of equal to or less than 25 pins within a bank, the V
i (AC) for the LVCMOS input can go up to V
CCIO_PIO + 0.3 V at an overshoot duration of 100%.