EP3SL200 datasheet(12/341 Pages) ALTERA

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Chapter 1: Stratix III Device Datasheet: DC and Switching Characteristics

Electrical Characteristics

Stratix III Device Handbook, Volume 2

Altera Corporation

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.

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.

CC_CLKIN

Differential clock input power supply (top and bottom I/O

banks only)

-0.5

3.75

CCBAT

Battery back-up power supply for design security volatile

key register

-0.5

3.75

DC Input voltage

-0.5

4.0

Operating junction temperature

-55

125

°C

OUT

DC output current, per pin

-25

STG

Storage temperature (No bias)

-65

150

°C

Note to Table 1–1:

(1) Supply voltage specifications apply to voltage readings taken at the device pins, not the power supply.

Table 1–1. Absolute Maximum Ratings for Stratix III Devices (Note 1) (Part 2 of 2)

Symbol

Parameter

Minimum

Maximum

Unit

Figure 1–1. Overshoot Duration

3.0 V

3.15 V

4.1 V

ΔT

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