EMC1001 Datasheet, PDF (1/16 Pages) SMSC Corporation – 1.5°C SMBus Temperature Sensor in Miniature SOT-23

EMC1001
1.5°C SMBus
Temperature Sensor in
Miniature SOT-23
PRODUCT FEATURES
Datasheet
General Description
The EMC1001 is a tiny SMBus temperature sensor with
±1.5°C accuracy and two interrupts. Packaged in a
SOT23-6, the EMC1001 provides an accurate, low-cost,
low-current, solution for critical temperature monitoring
in a PC or embedded applications.
The EMC1001 generates two separate interrupts with
programmable thermal trip points. The THERM output
operates as a thermostat with programmable threshold
and hysteresis. The ALERT output can be configured
as a maskable SMBus alert with programmable
window comparator limits, or as a second THERM
output. An efficient fan control system can be created
since this output may be used to control a fan.
A power down mode extends battery life in portable
applications.
Each part number may be configured to respond to one
of four separate SMBus addresses.
Features
„ Self Contained Internal Temperature Sensor
— 0.25°C resolution
— ±1.5°C Accuracy 40°C to 85°C
„ Small 6-lead SOT lead-free RoHS compliant
packages
„ SMBus address selected by external resistor
— Select 1 of 4 per package, 8 addresses available
„ Maskable Interrupt using ALERT
„ One-shot Command during standby
„ Low Power, 3.0V to 3.6V Supply
— 47uA at 0.0625 Conversions per Second (Typical)
— 4.8uA in Standby (Typical)
„ SMBus 2.0 Compliant interface
„ Programmable temperature conversion rate
Applications
„ Desktop and Notebook Computers
„ Thermostats
„ Smart batteries
„ Industrial/Automotive
„ Other Electronic Systems
Simplified Block Diagram
Switching
Current
Internal
Temp Diode
10-bit
delta-sigma
ADC
EMC1001
Temperature
Register
Status Register
Address Pointer Register
Conversion Rate Register
High Limit Registers
Low Limit Registers
THERM Limit Register
THERM Hysteresis Register
Configuration Register
Interrupt Masking
SMSC EMC1001
DATASHEET
SMCLK
SMDATA
ALERT
THERM
Revision 1.6 (01-29-07)