EMC1402 Standard Microsystems Corp., EMC1402 Datasheet - Page 21

• Manufacturer Part Number: EMC1402
• Description: 1 Degree C Temperature Sensor With Beta Compensation
• Manufacturer: Standard Microsystems Corp.

1°C Temperature Sensor with Beta Compensation
Datasheet
SMSC EMC1402
5.12
Diode Fault
-1
0
0.125
1
64
65
127
127.875
128
190
191
>= 191.875
-64
TEMPERATURE (°C)
Note 5.1
Note 5.2
Note 5.3
Note 5.4
The EMC1402 can be configured to measure a CPU substrate transistor, a discrete 2N3904 thermal
diode, or an AMD processor diode. The diode can be connected in a variety of ways as indicated in
Figure
External Diode Connections
5.5.
In default mode, all temperatures < 0°C will be reported as 0°C.
In the extended range, all temperatures < -64°C will be reported as -64°C.
For the default range, all temperatures > +127.875°C will be reported as +127.875°C.
For the extended range, all temperatures > +191.875°C will be reported as +191.875°C.
000 0000 0000
000 0000 0000
000 0000 0000
000 0000 0000
Note 5.1
000 0000 0001
000 0000 1000
010 0000 0000
010 0000 1000
011 1111 1000
011 1111 1111
011 1111 1111
Note 5.3
011 1111 1111
011 1111 1111
011 1111 1111
Table 5.2 EMC1402 Temperature Data Format
DEFAULT RANGE 0°C TO 127°C
DATASHEET
21
000 0000 0000
000 0000 0000
Note 5.2
001 1111 1111
010 0000 0000
010 0000 0001
010 0000 1000
100 0000 0000
100 0000 1000
101 1111 1000
101 1111 1111
110 0000 0000
111 1111 0000
111 1111 1000
111 1111 1111
Note 5.4
EXTENDED RANGE RANGE -64°C
TO 191°C
Revision 1.30 (05-06-08)