Intel III 450 MHz 80525PY450512 Data Sheet

53

The Pentium III processor incorporates an on-die diode that may be used to monitor the die 
temperature (junction temperature). A thermal sensor located on the baseboard, or a stand-alone 
measurement kit, may monitor the die temperature of the Pentium III processor for thermal 
management or instrumentation purposes. 

 provide the diode parameter and 

interface specifications.

1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. At room temperature with a forward bias of 630 mV.
3. n_ideality is the diode ideality factor parameter, as represented by the diode equation: 

I=Io(e (Vd*q)/(nkT) – 1).

4. This specification applies to the Pentium III processor with CPUID=067xh.
5. This specification applies to the Pentium III processor with CPUID=068xh.

I

forward bias

5

500

µA

n_ideality

1.0000 
1.0057

1.0065 
1.0080

1.0173 
1.0125

2, 3, 4 
2, 3, 5

THERMDP

B14

diode anode (p_junction)

THERMDN

B15

diode cathode (n_junction)