Datasheet

Electrical Characteristics
R
172 Datasheet
Symbol Parameter Min Typ Max Unit Notes
2.5 V DDR SDRAM System Memory
Clock Buffers Supply Current (DDR266
SDRAM)
0.14 A
I
VCCQSM
2.5 V DDR SDRAM System Memory
Clock Buffers Supply Current (DDR333
SDRAM)
0.18 A
I
SUS_VCCSM
2.5 V DDR SDRAM System Memory
Interface Standby Supply Current
1 mA
I
SMVREF_0
1.25 V DDR SDRAM System Memory
Interface Reference Voltage Supply
Current
0.05 mA
I
SUS_SMVREF_0
1.25 V DDR SDRAM System Memory
Interface Reference Voltage Standby
Supply Current
0.05 mA
I
TTRC/RCOMP
1.25 V DDR SDRAM System Memory
Interface Resister Compensation
Voltage Supply Current
40 mA
I
SUS_TTRC
1.25 V DDR SDRAM System Memory
Interface Resister Compensation
Voltage Standby Supply Current
0 mA
NOTE: This spec is the Thermal Design Power and is the estimated maximum possible expected power
generated in a component by a realistic application. It is based on extrapolations in both hardware and
software technology over the life of the component. It does not represent the expected power
generated by a power virus. Studies by Intel indicate that no application will cause thermally significant
power dissipation exceeding this specification, although it is possible to concoct higher power synthetic
workloads that write but never read. Under realistic read/write conditions, this higher power workload
can only be transient and is accounted in the Icc (Max) spec.
8.4 Signal Groups
The signal description includes the type of buffer used for the particular signal:
Signal Type Description
AGTL+ Open Drain AGTL+ interface signal. Refer to the AGTL+ I/O Specification for
complete details. The Intel 855GM/855GME GMCH integrate most AGTL+ termination
resistors
DVO/AGP DVO buffers, these are 1.5 V tolerant.
Hub Compatible to Hub Interface 1.5
SSTL_2 Stub Series Termination Logic compatible signals (2.5 V tolerant)
LVTTL Low Voltage TTL compatible signals (3.3 V tolerant)
CMOS CMOS buffers (3.3 V tolerant)
LVDS Low Voltage Differential signal interface
Analog Analog signal interface
Ref Voltage reference signal