EP3SL50F780C4 Datasheet, PDF (12/341 Pages) Altera Corporation – Stratix III Device Handbook

1–2
Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics
Electrical Characteristics
Table 1–1. Absolute Maximum Ratings for Stratix III Devices (Note 1) (Part 2 of 2)
Symbol
Parameter
Minimum
V_{CC_CLKIN}
Differential clock input power supply (top and bottom I/O
banks only)
-0.5
V_CCBAT
Battery back-up power supply for design security volatile
key register
-0.5
V_I
DC Input voltage
-0.5
T_J
Operating junction temperature
-55
I_OUT
DC output current, per pin
-25
T_STG
Storage temperature (No bias)
-65
Note to Table 1–1:
(1) Supply voltage specifications apply to voltage readings taken at the device pins, not the power supply.
Maximum Unit
3.75
V
3.75
V
4.0
V
125
°C
40
mA
150
°C
Sinusoidal Maximum Allowed Overshoot/Undershoot Voltage
During transitions, input signals may overshoot to the voltage listed in Table 1–2 and
undershoot to –2.0 V for input currents less than 100 mA and periods shorter than
20 ns.
Table 1–2 lists the maximum allowed input overshoot voltage and the duration of the
overshoot voltage as a percentage over the lifetime of the device. The maximum
allowed overshoot duration is specified as 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
4.2 V can only be at 4.2 V for 15.8% over the lifetime of the device; for a device lifetime
of 10 years, this is equivalent to 15.8% of ten years which is 18.96 months. Figure 1–1
shows how to determine the overshoot duration.
Figure 1–1. Overshoot Duration
4.1 V
3.15 V
3.0 V
ΔT
T
1 In the example shown in Figure 1–1, the overshoot voltage is shown in red and is
present at the Stratix III pin, up to 4.1 V. From Table 1–2, for an overshoot of up to 4.1
V, the percentage of high time for overshoot > 3.15 V can be as high as 46% over an
11.4-year period. The percentage of high time is calculated as (delta T/T) * 100. This
11.4-year period assumes the device is always turned on with 100% I/O toggle rate
and 50% duty cycle signal. For lower I/O toggle rates and situations where the device
is in an idle state, lifetimes are increased.
Stratix III Device Handbook, Volume 2
© July 2010 Altera Corporation