Intel 1.00 GHz BX80530F1000256 Data Sheet

68

The Celeron processor incorporates an on-die diode that can be used to monitor the die 
temperature. A thermal sensor located on the motherboard or a standalone measurement kit may 
monitor the die temperature of the Intel Celeron processor for thermal management purposes. 

 provide the diode parameter and interface specifications.

The reading of the thermal sensor connected to the thermal diode will not necessarily reflect the 
temperature of the hottest location on the die. This is due to inaccuracies in the thermal sensor, on-
die temperature gradients between the location of the thermal diode and the hottest location on the 
die at a given point in time, and time based variations in the die temperature measurement. Time 
based variations can occur when the sampling rate of the thermal diode (by the thermal sensor) is 
slower than the rate at which the T

junction

 temperature can change.

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. Not 100% tested. Specified by design characterization. 

1. Intel does not support or recommend operation of the thermal diode under reverse bias.
2. Characterized at 100

°

 C with a forward bias current of 5–300 

µ

A.

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

equation: 
I

fw

=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).

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

I

forward bias

5

500

uA

1

n_ideality

1.0000

1.0065

1.0173

2,3

I

forward bias

5

300

uA

1

n_ideality

1.0057

1.0080

1.0125

2, 3

THERMDP

B14

AL31

diode anode (p junction)

THERMDN

B15

AL29

diode cathode (n junction)