1–2

Chapter 1: DC and Switching Characteristics of HardCopy III Devices

Electrical Characteristics

HardCopy III Device Handbook, Volume 3

© December 2008

Altera Corporation

Maximum Allowed Overshoot and Undershoot Voltage

During transitions, input signals may overshoot to the voltage shown 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. The maximum allowed

overshoot duration is specified as the percentage of high time over the lifetime of the

device. A DC signal is equivalent to 100% duty cycle.

T

STG

Storage temperature (no bias)

–65

150

°C

Notes to Table 1–1:

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

(2) In Stratix III devices, this power supply is also used for programmable power technology.

(3) In HardCopy III devices, this power supply is not used.

Symbol

Parameter

Minimum

Maximum

Unit

Table 1–2. Maximum Allowed Overshoot During Transitions – Preliminary

Symbol

Parameter

Condition

Overshoot

Duration as % of

High Time

Unit

Vi (AC)

AC Input Voltage

4100.000

%

4.05

79.330

%

4.1

46.270

%

4.15

27.030

%

4.2

15.800

%

4.25

9.240

%

4.3

5.410

%

4.35

3.160

%

4.4

1.850

%

4.45

1.080

%

4.5

0.630

%

4.55

0.370

%

4.6

0.220

%

4.65

0.130

%

4.7

0.074

%

4.75

0.043

%

4.8

0.025

%

4.85

0.015

%