82845PE Datasheet, PDF (143/176 Pages) Intel Corporation – 82845GE Graphics and Memory Controller Hub (GMCH) and 82845PE Memory Controller Hub (MCH)

Electrical Characteristics
Electrical Characteristics
6
This chapter contains the thermal characteristics, power characteristics and DC characteristics for
the (G)MCH component.
6.1
Absolute Maximum Ratings
Table 6-1 lists the (G)MCH’s maximum environmental stress ratings. Functional operation at the
absolute maximum and minimum is neither implied nor guaranteed. Functional operating
parameters are listed in the DC characteristics tables.
Warning: Stressing the device beyond the “Absolute Maximum Ratings” may cause permanent damage.
These are stress ratings only. Operating beyond the “operating conditions” is not recommended and
extended exposure beyond “operating conditions” may affect reliability.
Table 6-1. Absolute Maximum Ratings
Symbol
T_die
T_storage
VCC1_5
VTT
VCCSM(DDR)
Parameter
Die Temperature under Bias
Storage Temperature
1.5 V Supply Voltage with respect to VSS
AGTL+ buffer DC input voltage with respect to VSS
2.5 V DDR Supply Voltage with respect to VSS
Min
Max
Unit
0
97
°C
-55
150
°C
-0.3
1.75
V
-0.3
1.75
V
-0.5
3
V
6.2
Thermal Characteristics
The (G)MCH is designed for operation at die temperatures between 0 °C and 97 °C. The thermal
resistance of the package is given in Table 6-2. See the Intel^® 845GE/845PE Chipset Thermal
Design Guide for more information.
Table 6-2. Intel^® (G)MCH Package Thermal Resistance
Parameter
Airflow Velocity in Meters/Second
No Air Flow
1 m/s
Ψ_jt (°C/Watt)**
Θ_ja (°C/Watt)**
(see note)
(see note)
(see note)
(see note)
NOTE: Refer to the Intel^® 845GE/845PE Chipset Thermal Design Guide for more information.
Intel^® 82845GE/82845PE Datasheet
143