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EMC1212 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EMC1212
기능 BBUS Compliant Dual Temperature Monitor
제조업체 SMSC Corporation
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EMC1212 데이터시트, 핀배열, 회로
EMC1212
BBUS Compliant Dual
Temperature Monitor
with Beta Compensation
PRODUCT FEATURES
GENERAL DESCRIPTION
APPLICATIONS
The EMC1212 is a temperature sensor that
communicates with a host over a single-wire SMSC
BudgetBus™ Sensor Interface. The EMC1212 monitors
one internal diode and one remote temperature zone.
Packaged in a SOT23-5, the EMC1212 provides an
accurate, low-cost, low-current, solution for critical
temperature monitoring in applications such as
embedded systems or computers. 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 extends battery
life in portable applications. The internal 11-bit sigma
delta temperature-to-digital converter provides superb
linearity, high accuracy and excellent noise immunity.
The EMC1212 is designed to operate with 65nm or
90nm PNP substrate transistor used as a thermal diode
with the collector connected to ground.
„ Desktop and Notebook Computers
„ Hardware Management
FEATURES
„ Single Wire BBUS Interface
„ Resistance Error Correction
„ Beta Compensation
„ External Temperature Monitor
— 0.125°C resolution
— ±1°C Accuracy 60°C to 100°C
— Diode Fault Reporting
„ Internal Temperature Monitor
— Range 0°C to +85°C
— 0.125°C resolution
— ±1.5°C Accuracy 50°C to 70°C
„ Supply:
— 3.0V to 3.6V
— <5uA in Standby
SIMPLIFIED BLOCK DIAGRAM
EMC1212
Switching
Current
Local Temp
Diode
Datasheet
DP Beta
Comp
&
DN REC
Analog Mux
and
anti-aliasing
filter
11-bit
delta-sigma
ADC
Temperature
Registers
BBUS
Interface
BBUS
SMSC EMC1212
DATASHEET
Revision 1.1 (02-07-07)




EMC1212 pdf, 반도체, 판매, 대치품
BBUS Compliant Dual Temperature Monitor with Beta Compensation
Chapter 2 Electrical Specifications
Datasheet
2.1 Absolute Maximum Ratings
Table 2.1 EMC1212 Maximum Ratings
DESCRIPTION
Supply Voltage VDD
Voltage on any other pin to GND
Operating Temperature Range
Storage Temperature Range
Lead Temperature Range
Package Thermal Characteristics for SOT23-5
Power Dissipation
Thermal Resistance(at 0 air flow)
ESD Rating, All Pins Human Body Model
RATING
-0.3 to 5.0
-0.3 to VDD +0.3
0 to 85
-55 to 150
Refer to JEDEC
Spec. J-STD-020
TBD
131.7
2000
UNIT
V
V
°C
°C
°C/W
V
2.2
Note:
Stresses above those listed could cause damage to the device. This is a stress rating only
and functional operation of the device at any other condition above those indicated in the
operation sections of this specification is not implied. When powering this device from
laboratory or system power supplies, it is important that the Absolute Maximum Ratings not be
exceeded or device failure can result. Some power supplies exhibit voltage spikes on their
outputs when the AC power is switched on or off. In addition, voltage transients on the AC
power line may appear on the DC output. If this possibility exists, it is suggested that a clamp
circuit be used.
Electrical Specifications
VDD = 3.3V ± 10% TA = 0°C to 85°C, all Typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC
Supply Voltage
Supply Current
Supply Current
Temperature Accuracy
Temperature Resolution
SYMBOL MIN TYP MAX UNIT
DC Power
VDD 3 3.3 3.6 V
IDD 700 1000 uA
IDD 2 5 uA
Internal Temperature Monitor
±1 ±3 °C
±1.5 °C
0.125
°C
CONDITIONS
Active Mode
Standby Mode
50°C < TA < 70°C
Revision 1.1 (02-07-07)
4
DATASHEET
SMSC EMC1212

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EMC1212 전자부품, 판매, 대치품
BBUS Compliant Dual Temperature Monitor with Beta Compensation
Datasheet
Chapter 3 Product Description
The EMC1212 is a SOT23 temperature sensor with a proprietary single wire SMSC BudgetBus™
Sensor Interface. Temperature information is communicated to a host device via the serial bus. All
intelligence regarding the interpretation of temperature resides in the host. The EMC1212 monitors an
internal diode and single external transistor and automatically corrects for errors induced by series
resistance and beta variation. Figure 3.1 shows a typical system overview:
EMC1212
DP
DN
BBUS
Host
(e.g. KBC1122)
BBUS
Interface
3.1
Figure 3.1 System Diagram of EMC1212
Thermal management consists of the host acquiring the temperature data from the EMC1212 and
controlling the speed of one or more fans. Because the EMC1212 incorporates one internal and one
external temperature diode, up to two separate thermal zones can be monitored and controlled. The
host has the ability to compare measured temperature levels to preset limits and take the appropriate
action when values are found to be out of limit.
Power Modes
The EMC1212 has two basic modes of operation that are controlled entirely by the host device.
Standby Mode:
The host can initiate standby mode by actively pulling the BBUS low. When the Host places the device
in standby mode, the device immediately powers down to draw < 2uA of supply current. It will remain
in this state until it is awakened by the host. If the host pulls the BBUS line low while temperature data
is being clocked out, the device will not enter standby mode until completion of the data transfer. After
entering standby mode, the device will remain in this mode until it is forced into active mode by the
host. The transition from standby to active mode occurs when the host is no longer pulling the BBUS
low.
Active Mode:
The host initiates active mode by enabling a weak pull up on the BBUS. In this mode, the EMC1212
continuously converts 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. After a conversion is completed, the device automatically clocks out the data from the
most recent conversion to the host. When the data packet has been entirely clocked out, the BBUS
returns to tri-state mode, and the ADC begins converting the next temperature sample. While BBUS
is in tri-state mode, the host can command the device to standby mode.
SMSC EMC1212
7
DATASHEET
Revision 1.1 (02-07-07)

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부품번호상세설명 및 기능제조사
EMC1212

BBUS Compliant Dual Temperature Monitor

SMSC Corporation
SMSC Corporation

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