EMC1203 Datasheet, PDF (1/10 Pages) SMSC Corporation – Triple/Quad Single-Wire Temp Sensor in MSOP-8 Using SMSC BudgetBus Sensor Interface

EMC1203/EMC1204
Triple/Quad Single-Wire Temp
Sensor in MSOP-8 Using SMSC
BudgetBus^TM Sensor Interface
Datasheet
General Description
The EMC1203 and EMC1204 are temperature sensors
that communicate with a host over a single-wire SMSC
BudgetBus™ Sensor Interface. The EMC1203 has an
internal temperature sensor and monitors up to two
remote diodes. An additional remote diode is added with
the EMC1204 for a total of three remote zones, and both
devices are in a small MSOP-8 package. 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 preserves
battery life in portable applications. The internal 11-bit
sigma delta temperature-to-digital converter provides
superb linearity, high accuracy and excellent noise
immunity.
PART
NUMBER
EMC1203
EMC1204
INTERNAL
TEMPERATURE
MONITOR
1
1
REMOTE
TEMPERATURE
MONITOR
2
3
Features
„ Single-wire SMSC BudgetBus™ Sensor Interface
„ Low Power, 3.0V to 3.6V Supply
— < 50uA at 1 conversion per second
— < 2.5uA in Standby
„ External Temperature Sensor
— Range -63.875º C to +191.875º C
— 0.125º C resolution
— ±1º C Accuracy 60º C to 100º C
— Diode Fault Reporting
„ Self Contained Internal Temperature Sensor
— Range 0º C to +85º C
— 0.125º C resolution
— ±3º C Accuracy 0º C to 85º C
„ MSOP-8 3x3mm packages; green, lead-free
packages also available
Applications
„ Desktop Computers
„ Notebook Computers
„ Server Applications
Simplified Block Diagram
Switching
Current
DP1
DN1
DP2/DN3
DN2/DP3
Local Temp
Diode
EMC1203/EMC1204
11-bit
Sigma Delta
ADC
Temperature
Registers
BBUS
Interface
BBUS
SMSC EMC1203/EMC1204
DATASHEET
Revision 1.1 (06-12-06)