EP4SGX360KF40C3N Datasheet, PDF (12/82 Pages) Altera Corporation – This chapter covers the electrical and switching characteristics for Stratix IV devices

Chapter 1: DC and Switching Characteristics for Stratix IV Devices
1–4
Electrical Characteristics
Maximum Allowed Overshoot and Undershoot Voltage
During transitions, input signals may overshoot to the voltage shown in Table 1–4 and
undershoot to –2.0 V for input currents less than 100 mA and periods shorter than
20 ns.
Table 1–4 lists the maximum allowed input overshoot voltage and the duration of the
overshoot voltage as a percentage of device lifetime. 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 4.3 V can only be at 4.3 V for ~5% over the lifetime of the device; for a
device lifetime of 10 years, this amounts to half of a year.
Table 1–4. Maximum Allowed Overshoot During Transitions
Symbol
Description
Condition (V)
Overshoot Duration as
% of High Time
Unit
4.0
4.05
4.1
4.15
4.2
4.25
Vi (AC)
AC input voltage
4.3
4.35
4.4
4.45
4.5
4.55
4.6
100.000
%
79.330
%
46.270
%
27.030
%
15.800
%
9.240
%
5.410
%
3.160
%
1.850
%
1.080
%
0.630
%
0.370
%
0.220
%
Temperature Overshoot Above Maximum Allowed Temperature
The maximum allowed operating temperature for Stratix IV industrial grade devices
is 100 °C. It is recommended that the operating temperature of the device is
maintained below 100 °C at all times. The temperature excursions over 100 °C due to
internal heating of the device should not exceed the number of cycles as specified in
the Table 1–5. Exceeding the recommended number of cycles may cause solder
interconnect failures. Altera^® recommends using the Stratix IV military grade devices
if the application requires operating temperatures over 100 °C.
Table 1–5. Temperature Overshoot Above Maximum Allowed Temperature
Description
Device operating
temperature (°C)
Operating Temperature (°C)
100
105
110
115
120
125
Number of Cycles Over 100 °C
3200
768
640
480
320
160
July 2012 Altera Corporation
Stratix IV Device Handbook
Volume 4: Device Datasheet and Addendum