EMC1203 Standard Microsystems Corporation, EMC1203 Datasheet

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EMC1203

Manufacturer Part Number
EMC1203
Description
Triple/quad Single-wire Temp Sensor in Msop-8 Using SMSC Budgetbus Sensor Interface
Manufacturer
Standard Microsystems Corporation
Datasheet
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.
SMSC EMC1203/EMC1204
NUMBER
EMC1203
EMC1204
PART
DP2/DN3
DN2/DP3
DN1
DP1
General Description
TEMPERATURE
INTERNAL
MONITOR
Local Temp
Switching
Current
Diode
1
1
TEMPERATURE
MONITOR
REMOTE
2
3
Sigma Delta
EMC1203/EMC1204
DATASHEET
11-bit
ADC
Simplified Block Diagram
Single-wire SMSC BudgetBus™ Sensor Interface
Low Power, 3.0V to 3.6V Supply
External Temperature Sensor
Self Contained Internal Temperature Sensor
MSOP-8 3x3mm packages; green, lead-free
Desktop Computers
Notebook Computers
Server Applications
— < 50uA at 1 conversion per second
— < 2.5uA in Standby
— Range -63.875
— 0.125
— Diode Fault Reporting
— Range 0
— 0.125
— ±3º C Accuracy 0º C to 85º C
packages also available
Triple/Quad Single-Wire Temp
Sensor in MSOP-8 Using SMSC
BudgetBus
EMC1203/EMC1204
Temperature
±
Registers
1
º
C Accuracy 60
º
º
C resolution
C resolution
Features
Applications
º
C to +85
º
C to +191.875
º
º
TM
C to 100
C
Interface
BBUS
Sensor Interface
º
º
C
Revision 1.1 (06-12-06)
C
Datasheet
BBUS

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EMC1203 Summary of contents

Page 1

... 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 ...

Page 2

... Datasheet EMC1203-ACZL- PIN MSOP PACKAGE (GREEN, LEAD-FREE) EMC1204-ACZL- PIN MSOP PACKAGE (GREEN, LEAD-FREE) Evaluation Board available upon request. (EVB-KBC1100) 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2006 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given ...

Page 3

... Triple/Quad Single-Wire Temp Sensor in MSOP-8 Using SMSC BudgetBus Datasheet Chapter 1 Pin Configuration DP1 DN1 DN2/DP3 DP2/DN3 Figure 1.1 EMC1203 and EMC1204 Pin Configuration 1.1 Pin Description Table 1.1 EMC1203 and EMC1204 Pin Description PIN PIN NO. DP1 1 DN1 2 DN2/DP3 3 DP2/DN3 4 BBUS 5 SCLK 6 GND 7 VDD 8 SMSC EMC1203/EMC1204 ...

Page 4

... Absolute Maximum Ratings Table 1.2 EMC1203 and EMC1204 Maximum Ratings DESCRIPTION Supply Voltage V DD Voltage on any other pin Operating Temperature Range Storage Temperature Range Lead Temperature Range Package Thermal Characteristics for MSOP-8 Power Dissipation Thermal Resistance(at 0 air flow) ESD Rating, All Pins Human Body Model Note: Stresses above those listed could cause damage to the device ...

Page 5

... External Temperature Measurement Temperature Accuracy Remote Diode 60°C to 100°C Remote Diode 0°C to 125°C Remote Diode 0°C to 125°C ADC Resolution Conversion Time per sensor SMSC EMC1203/EMC1204 TM Sensor Interface Table 2.1 Electrical Characteristics = 0°C to +85°C, Typical values 27°C unless otherwise noted A A ...

Page 6

... The EMC1203 and the DP1/DN1 port of the EMC1204 are compatible with CPU substrate diodes. Two separate temperature zones are monitored using only two pins on the EMC1204. This is ...

Page 7

... EMC1203 Temperature Monitoring The EMC1203, incorporates one internal diode and can monitor two additional temperature zones with two external diodes.An internal analog multiplexer switches between the internal and external diodes. Total conversion time for one internal and two external temperature readings is about 60ms. The external diodes can be either a CPU substrate diode or a discrete diode connected transistor like the 2N3904 or 2N3906 ...

Page 8

... Active Mode: The host initiates active mode by enabling a weak pull up on the BBUS. In this mode, the EMC1203 and EMC1204 continuously convert temperature data. During the time that the device is actively converting a temperature, the BBUS is in tri-state mode, and the Host places a weak pull-up on the bus to prevent it from floating ...

Page 9

... DP and DN pins. 3.5 Conversion Rate The conversion rate can be controlled by the host. This is accomplished by periodically placing the device in standby as described in SMSC EMC1203/EMC1204 TM Sensor Interface shows example temperature readings and the value that will be reported on the Table 3.1 Temperature Data Format 2’ ...

Page 10

... Triple/Quad Single-Wire Temp Sensor in MSOP-8 Using SMSC BudgetBus MAX 1.10 Overall Package Height 0.15 0.95 Body Thickness 3.20 5.15 3.20 0.23 Lead Foot Thickness 0.80 Lead Foot Length o 8 Lead Foot Angle 0.38 0.10 8 DATASHEET TM Sensor Interface Datasheet REMARKS Standoff X Body Size Y Span Y body Size Lead Length Lead Pitch Lead Width Coplanarity SMSC EMC1203/EMC1204 ...

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