EMC1201/EMC1202
Single/Dual Single-Wire Temp
Sensor in SOT23-5 Using
SMSC BudgetBus
TM
Sensor
Interface
PRODUCT FEATURES
General Description
The EMC1201 and EMC1202 are temperature sensors
that communicate with a host over a single-wire SMSC
BudgetBus™ Sensor Interface. The EMC1201 has an
internal temperature sensor and the EMC1202 adds one
remote diode. Packaged in a SOT23-5, the EMC1201
provides an accurate, low-cost, low-current, solution for
critical temperature monitoring in applications such as
embedded systems or computers. When used in
combination with an SMSC Super I/O host, such as a
keyboard controller, a complete thermal management
system is created. A power down mode extends battery
life in portable applications. The internal 11-bit sigma
delta temperature-to-digital converter provides superb
linearity, high accuracy and excellent noise immunity.
Features
Datasheet
Single-wire SMSC BudgetBus™ Sensor Interface
Low Power, 3.0V to 3.6V Supply
— < 50uA at 1 conversion per second
— < 3uA in Standby
External Temperature Sensor
— Range -63.875
º
C to +191.875
º
C
— 0.125
º
C resolution
—
±
1
º
C Accuracy 60
º
C to 100
º
C
— Diode Fault Reporting
Self Contained Internal Temperature Sensor
— Range 0
º
C to +85
º
C
— 0.125
º
C resolution
—
±
3
º
C Accuracy 0
º
C to 85
º
C
SOT23-5 Green, Lead-free Packages
Applications
Desktop and Notebook Computers
Thermostats
Smart batteries
Industrial/Automotive
Other Electronic Systems
PART
NUMBER
INTERNAL
TEMPERATURE
MONITOR
EXTERNAL
TEMPERATURE
MONITOR
EMC1201
EMC1202
1
1
0
1
Simplified Block Diagram
EMC1201/EMC1202
Switching
Current
Local Temp
Diode
DP
Analog
Mux
DN
External
Diode for
EMC1202
Only
11-bit
delta-sigma
ADC
Temperature
Registers
BBUS
Interface
BBUS
SMSC EMC1201/EMC1202
DATASHEET
Revision 1.0 (06-14-06)
SMSC [ SMSC CORPORATION ]
