Download Intel Pentium D 940

Electrical Specifications
Table 4.
Voltage and Current Specifications
Symbol
Parameter
Processor number
IENHANCED_
AUTO_HALT
ITCC
VTT
Min
Typ
Max
—
—
68
2
ICC Enhanced Auto Halt for
775_VR_CONFIG_05B
(Performance)
Extreme Edition 965
3.73 GHz
Extreme Edition 955
3.46 GHz
960
3.60 GHz
60
950
3.40 GHz
60
940
3.20 GHz
60
Processor number
Unit Notes1,
68
ICC Enhanced Auto Halt for
775_VR_CONFIG_05A
(Mainstream)
960
3.60 GHz
950/945
3.40 GHz
940/935
3.20 GHz
48
930/925
3.00 GHz
48
920/915
2.80 GHz
48
ICC TCC active
FSB termination voltage
(DC + AC specifications)
—
—
A
10,11
48
48
—
—
ICC
A
12
1.14
1.20
1.26
V
13, 14
VTT_OUT_
LEFT and
VTT_OUT_
RIGHT ICC
DC Current that may be drawn from VTT_OUT_LEFT and
VTT_OUT_RIGHT per pin
—
—
580
mA
ITT
Steady-state FSB termination current
—
—
4.5
A
15, 16
ITT_POWER-UP
Power-up FSB termination current
—
—
7.5
A
15, 17
ICC_VCCA
ICC for PLL lands
—
—
70
mA
ICC_VCCIOPLL
ICC for I/O PLL land
—
—
52
mA
ICC_GTLREF
ICC for GTLREF
—
—
200
μA
NOTES:
1. Unless otherwise noted, all specifications in this table are based on estimates and simulations or empirical data. These
specifications will be updated with characterized data from silicon measurements at a later date.
2. Adherence to the voltage specifications for the processor are required to ensure reliable processor operation.
3. Each processor is programmed with a maximum valid voltage identification value (VID), which is set at manufacturing and can
not be altered. Individual maximum VID values are calibrated during manufacturing such that two processors at the same
frequency may have different settings within the VID range. Note that this differs from the VID employed by the processor during
a power management event (Enhanced Intel SpeedStep technology or Enhanced HALT State).
4. These voltages are targets only. A variable voltage source should exist on systems in the event that a different voltage is required.
See Section 2.3 and Table 2 for more information.
5. The voltage specification requirements are measured across VCC_SENSE and VSS_SENSE lands at the socket with a 100 MHz
bandwidth oscilloscope, 1.5 pF maximum probe capacitance, and 1 MΩ minimum impedance. The maximum length of ground wire
on the probe should be less than 5 mm. Ensure external noise from the system is not coupled into the oscilloscope probe.
6. Refer to Table 5 and Figure 1 for the minimum, typical, and maximum VCC allowed for a given current. The processor should not
be subjected to any VCC and ICC combination wherein VCC exceeds VCC_MAX for a given current.
7. ICC_MAX specification is based on VCC Maximum loadline. Refer to Figure 1 for details.
8. ICC_RESET is specified while RESET# is active.
9. The current specified is also for AutoHALT State.
10.ISGNT and ICC_ENHANCED_AUTO_HALT are specified at VCC_TYP and TC = 50 °C.
11.These parameters are based on design characterization and are not tested.
12.The maximum instantaneous current the processor will draw while the thermal control circuit is active (as indicated by the
assertion of PROCHOT#) is the same as the maximum ICC for the processor.
13.VTT must be provided via a separate voltage source and not be connected to VCC. This specification is measured at the land.
14.Baseboard bandwidth is limited to 20 MHz.
22
Datasheet