Intel 1.00 GHz YK80542KC0013M Benutzerhandbuch

23

Overshoot (or undershoot) is the absolute value of the maximum voltage above the nominal 
V

CTERM

 voltage (or below GND), as shown in 

. The overshoot/undershoot specifications 

limit transitions beyond V

CTERM

 or GND due to the fast signal edge rates. The processor can be 

permanently damaged by repeated overshoot or undershoot events on any input, output, or I/O 
buffer if the charge is large enough (that is, if the overshoot/undershoot is great enough). 
Determining the impact of an overshoot/undershoot condition requires knowledge of the 
magnitude, the pulse duration, and the activity factor (AF). 

Magnitude describes the maximum potential difference between a signal and its voltage reference 
level. For the Itanium 2 processor, both are referenced to GND as shown in 

. It is 

important to note that overshoot and undershoot conditions are separate and their impact must be 
determined independently. Overshoot/undershoot magnitude levels must observe the absolute 
maximum specifications listed in 

through 

. These specifications must not be 

violated at any time regardless of bus activity or system state. Within these specifications are 
threshold levels that define different allowed pulse duration. Provided that the magnitude of the 
overshoot/undershoot is within the absolute maximum specifications (1.8 V for overshoot and
–0.60 V for undershoot), the pulse magnitude, duration and activity factor must all be used to 
determine if the overshoot/undershoot pulse is within specifications.

V

in, SMBus

SMBus Buffer DC Input Voltage with 
Respect to GND

–0.1

6.0

V

V

in, AGTL+

AGTL+ Buffer DC Input Voltage with 
Respect to GND

–0.1

1.9

V

5,

 

6

V

CTERM

Any V

CTERM 

Voltage with Respect to 

GND

–0.1

1.9

V

V

in,TAP

TAP Buffer DC Input Voltage with 
Respect to GND.

–0.1

2.1

V

1. Storage temperature is temperature in which the processor can be stored for up to one year.
2. Shipping temperature is temperature in which the processor can be shipped for up to 24 hours.
3. See 

 through 

 inclusive for operating voltages.

4. Parameters are from third party vendor specifications.
5. Maximum instantaneous voltage at receiver buffer input.
6. Specification includes V

in,AGTL+

 and V

in,AGTL+ ASYNCHRONOUS 

(AGTL+ asynchronous buffer DC input voltage with 

respect to GND.