EMC1073 Datasheet, PDF (1/45 Pages) SMSC Corporation – Multiple Channel 1°C Temperature Sensors with Selectable Address

EMC1073 / EMC1074
Multiple Channel 1°C
Temperature Sensors with
Selectable Address
PRODUCT FEATURES
Datasheet
General Description
The EMC1073 and EMC1074 are high accuracy, low
cost, System Management Bus (SMBus) temperature
sensors with pin selectable SMBus addresses.
Each device provides ±1° accuracy (max) for external
diode temperatures and ±2°C accuracy (max) for the
internal diode temperature. The EMC1073 monitors
three temperature channels (two external and one
internal). The EMC1074 monitors four temperature
channels (three external and one internal).
Applications
„ Notebook Computers
„ Desktop Computers
„ Industrial
„ Embedded applications
Features
„ External Temperature Monitors
— ±0.25°C typ accuracy (20°C < T_DIODE < 110°C)
— 0.125°C resolution
— Supports 2N3904 and AMD diodes
— Anti-parallel diodes for extra diode support (EMC1074)
„ Internal Temperature Monitor
— ±0.25°C typ accuracy (-5°C < T_A < 100°C)
„ 3.3V Supply Voltage
„ SMBus 2.0 Compliant
— Programmable SMBus address
„ Programmable Temperature Limits for ALERT and
THERM
„ Available in Small 10-pin MSOP Lead-free RoHS
Compliant Package
Block Diagram
VDD
DP1
DN1
DP2 / DN3*
Anti-parallel
Diode
DN2 / DP3*
EMC1073 / EMC1074
Switching
Current
Analog
Mux
ΔΣ ADC
Internal Temp
Diode
External Temperature
Register(s)
Internal
Temperature Register
Status Registers
* DN3 and DP3 are EMC1074 only
GND
Conversion Rate Register
Low Limit Registers
High Limit Registers
THERM Limit Register
THERM Hysteresis Register
SMCLK
SMDATA
Configuration Register
Interupt Masking
ALERT
SMBus Address Decode
THERM/ADDR
SMSC EMC1073 / EMC1074
DATASHEET
Revision 1.39 (10-11-10)