Intel Celeron Processor for the PGA370 Socket up to 1.40 GHz on 0.13 Micron Process Datasheet

52 Datasheet

Intel

Celeron

Processor for PGA370 up to 1.40 GHz on 0.13 µ Process

4.1.2 Thermal Diode

The processor incorporates an on-die diode that may be used to monitor the die temperature

(junction temperature). A thermal sensor located on the motherboard, or a stand-alone

measurement kit, may monitor the die temperature of the processor for thermal management or

instrumentation purposes. Table 32 and Table 33 provide the diode parameter and interface

specifications.

The processor uses an Integrated Heat Spreader (IHS) and has a case temperature requirement.

Please see the Intel

Pentium

III Processor in the FC-PGA2, 370-pin Package Thermal Design

Guidelines document for details on measuring the case temperature. The thermal diode should be

used for system thermal management and not

determining spec compliance.

NOTES:

1. Intel does not support or recommend operation of the thermal diode under reverse bias.

2. Characterized at 75

° C with a forward bias current of 5 – 150 µA.

3. Characterized at 75

° C with a forward bias current of 5 – 300 µA.

4. The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode

equation:

=Is(e^ ((Vd*q)/(nkT)) - 1), where Is = saturation current, q = electronic charge, Vd = voltage across the

diode, k = Boltzmann Constant, and T = absolute temperature (Kelvin).

5. Not 100% tested. Specified by design characterization.

4.2 Thermal Metrology

The thermal metrology for the processor in the FC-PGA2 package should be followed to evaluate

the thermal performance of proposed cooling solutions. The thermal metrology is contained in the

Intel

Pentium

III Processor in the FC-PGA2, 370-pin Package Thermal Design Guidelines.

Please contact your local Intel field office to obtain this document.

Table 32. Thermal Diode Parameters

Symbol Parameter Min Typ Max Unit Notes

Forward Bias Current 5 N/A 150 µA 1

n Diode Ideality Factor 1.001452 1.007152 1.012852 2, 4, 5

Forward Bias Current 5 N/A 300 µA 1

n Diode Ideality Factor 1.000807 1.009528 1.018249 3, 4, 5

Table 33. Thermal Diode Interface

Pin Name PGA370 Socket pin # Pin Description

THERMDP AL31 diode anode (p_junction)

THERMDN AL29 diode cathode (n_junction)