EMCT03
1°C Triple SMBus
Temperature Sensor
Data Brief
General Description
The EMCT03 is a System Management Bus (SMBus)
temperature sensor that is capable of monitoring three
temperature zones for a PC or embedded environment.
The three temperature zones consist of two external and
one internal temperature diode. The internal 11 bit
sigma-delta ADC architecture with digital filtering
attributes to superb linearity and immunity to
interference and noise. An extended temperature format
may be selected for compatibility with a broad range of
CPUs. Selectable conversion rates and standy mode
support low-power operation.
■
Features
Low Power; 3.0V to 3.6V Supply
— Programmable conversion rate
— < 1mA at 16 Conversions per Second
— < 3uA in Standy Mode
■
■
SMBus 2.0 Compliant interface
Two External Temperature Monitors:
—
—
—
—
Range -64°C to +191°C
0.125°C resolution
±1°C
Accuracy 40°C to 80°C
Diode Fault Reporting
■
Internal Temperature Monitor
— Range 0°C to +85°C
— 0.125°C resolution
—
±3°C
Accuracy 0°C to 85°C
Applications
■
■
■
■
Desktop and Notebook Computers
Thermostats
Smart batteries
Industrial / Automotive
■
■
Programmable Conversion Rate
MSOP-8 3x3mm Package
Simplified Block Diagram
EMCT03
Switching
Current
Remote Temp
Register 1
SMBus Interface
Analog Mux
Configuration
Register
DP1
DN1
DP2
DN2
Local Temp
Diode
11-bit
Sigma Delta
ADC
Remote Temp
Register 2
Digital Mux
and
Byte Interlock
Local Temp
Register
Status Register
SMCLK
SMDATA
SMSC EMCT03
PRODUCT PREVIEW
Revision 2.1 (09-03-04)
1°C Triple SMBus Temperature Sensor
Package Outline
Figure 1 8-Pin MSOP Package Outline - 3x3mm Body 0.65mm Pitch
Table 1 8-Pin MSOP Package Parameters
MIN
A
A1
A2
D
E
E1
H
L
L1
e
0.80
0.05
0.75
2.80
4.65
2.80
0.08
0.40
NOMINAL
~
~
0.85
3.00
4.90
~
~
~
0.95 REF
0.65 BSC
0
o
0.22
~
~
~
~
8
o
0.38
0.10
MAX
1.10
0.15
0.95
3.20
5.15
3.20
0.23
0.80
REMARKS
Overall Package Height
Standoff
Body Thickness
X Body Size
Y Span
Y body Size
Lead Foot Thickness
Lead Foot Length
Lead Length
Lead Pitch
Lead Foot Angle
Lead Width
Coplanarity
θ
W
ccc
Notes:
1. Controlling Unit: millimeters.
2. Tolerance on the true position of the leads is ± 0.065 mm maximum.
3. Package body dimensions D and E1 do not include mold protrusion or flash. Dimensions D and
E1 to be determined at datum plane H. Maximum mold protrusion or flash is 0.15mm (0.006 inches)
per end, and 0.15mm (0.006 inches) per side.
4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.
5. Details of pin 1 identifier are optional but must be located within the zone indicated.
Revision 2.1 (09-03-04)
PRODUCT PREVIEW
2
SMSC EMCT03
1°C Triple SMBus Temperature Sensor
ORDER NUMBER(S):
EMCT03-ACZB for 8-pin MSOP package
EMCT03-ACZB-TR for 8-pin MSOP package (Tape and Reel)
EMCT03-ACZL for 8-pin MSOP package (Lead Free)
EMCT03-ACZL-TR for 8-pin MSOP package (Lead Free, Tape and Reel)
Evaluation Board Available upon request.
80 Arkay Drive
Hauppauge, NY 11788
(631) 435-6000
FAX (631) 273-3123
Copyright © SMSC 2004. All rights reserved.
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SMSC EMCT03
PRODUCT PREVIEW
3
Revision 2.1 (09-03-04)
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