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Intel
®
82845 MCH for SDR Datasheet 119
6 Electrical Characteristics
This chapter contains the absolute maximum operating ratings, power characteristics, and DC
characteristics for the 82845 MCH.
6.1 Absolute Maximum Ratings
Table 18 lists the 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 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 18. Absolute Maximum Ratings
Symbol Parameter Min Max Unit Notes
Tstorage Storage Temperature -55 150 °C
VCC1_5 1.5 V Supply Voltage with respect to VSS -0.72 2.3 V
VCC1_8 1.8 V Supply Voltage with respect to VSS -0.88 2.69 V
VCCSM 3.3 V Supply Voltage with respect to VSS -2.83 6.3 V
VTT AGTL+ buffer DC input voltage with respect
to VSS
-0.55 2.3 V
6.2 Power Characteristics
Table 19. Power Characteristics
Symbol Parameter Min Typ Max Unit Notes
I
VTT
MCH VTT supply current 2.4 A
I
VCC1_5_CORE
1.5 V core supply current 1.5 A 1
I
VCC1_5_AGP
1.5 V AGP supply current 0.37 A 1
I
VCC1_8
1.8 V hub interface supply current 0.20 A
I
VCCSM
3.3 V system memory supply current 2.0 A
I
SUS_3.3
3.3 V standby supply current 25 mA
HVREF, AGPREF, HI_REF, SDREF
supply current
10 mA
NOTES:
1. These current levels can happen simultaneously, and can be summed into one supply.