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EMC1423 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EMC1423
기능 (EMC1423 / EMC1424) Temperature Sensor
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EMC1423 데이터시트, 핀배열, 회로
EMC1423/EMC1424
1°C Temperature Sensor with
Hardware Thermal Shutdown
PRODUCT FEATURES
Datasheet
General Description
The EMC1423 and EMC1424 are high accuracy, low
cost, System Management Bus (SMBus) temperature
sensors. Advanced features such as Resistance Error
Correction (REC), Beta Compensation (to support CPU
diodes requiring the BJT/transistor model including
45nm, 65nm and 90nm processors) and automatic
diode type detection combine to provide a robust
solution for complex environmental monitoring
applications.
Additionally, the EMC1423 and EMC1424 provide a
hardware programmable system shutdown feature that
is programmed at part power-up via two pull-up resistor
values and that cannot be masked or corrupted through
the SMBus.
Each device provides ±1° accuracy for external diode
temperatures and ±2°C accuracy for the internal diode
temperature. The EMC1423 monitors three temperature
channels (two external and one internal). The EMC1424
monitors four temperature channels (three external and
one internal).
Resistance Error Correction automatically eliminates the
temperature error caused by series resistance allowing
greater flexibility in routing thermal diodes. Beta
Compensation eliminates temperature errors caused by
low, variable beta transistors common in today's fine
geometry processors. The automatic beta detection
feature monitors each external diode/transistor and
determines the optimum sensor settings for accurate
temperature measurements regardless of processor
technology. This frees the user from providing unique
sensor configurations for each temperature monitoring
application. These advanced features plus ±1°C
measurement accuracy provide a low-cost, highly
flexible and accurate solution for critical temperature
monitoring applications.
Applications
„ Notebook Computers
„ Desktop Computers
„ Industrial
„ Embedded applications
Features
„ Hardware Thermal Shutdown
— triggers dedicated SYS_SHDN pin
— hardware configured range 77°C to 112°C in 1°C steps
— cannot be disabled or modified by software
„ Support for diodes requiring the BJT/transistor model
— supports 45nm, 65nm, and 90nm CPU thermal diodes.
„ Automatically determines external diode type and
optimal settings
„ Resistance Error Correction
„ External Temperature Monitors
— ±1°C Accuracy (60°C < TDIODE < 100°C)
— 0.125°C Resolution
— Supports up to 2.2nF diode filter capacitor
— Anti-parallel diodes for extra diode support
„ Internal Temperature Monitor
— ±2°C accuracy
„ 3.3V Supply Voltage
„ Programmable temperature limits for ALERT
„ Available in Small 10-pin MSOP Lead-free RoHS
Compliant Package
SMSC EMC1423/EMC1424
DATASHEET
Revision 2.0 (08-10-12)




EMC1423 pdf, 반도체, 판매, 대치품
1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
6.10
6.11
6.12
6.13
6.14
6.15
6.16
6.17
6.18
6.19
6.20
6.21
6.22
Software Thermal Shutdown Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Hardware Thermal Shutdown Limit Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Channel Mask Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Consecutive ALERT Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Beta Configuration Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
External Diode Ideality Factor Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
High Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Low Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
THERM Limit Status Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Filter Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
SMSC ID Register (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Revision Register (FFh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 7 Typical Operating Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Chapter 8 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Chapter 9 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Revision 2.0 (08-10-12)
4
DATASHEET
SMSC EMC1423/EMC1424

4페이지










EMC1423 전자부품, 판매, 대치품
1°C Temperature Sensor with Hardware Thermal Shutdown
Datasheet
Chapter 1 Block Diagram
Switching
Current
VDD
EMC1423 / EMC1424
DP1
DN1
DP2
Anti-parallel
diodes
DN2
Analog
Mux
ΔΣ ADC
External
Temperature
Register(s)
Internal
Temperature
Register
Internal
Temp Diode
Status Registers
GND
SYS_SHDN Limit
Conversion Rate Register
Low Limit Registers
High Limit Registers
Configuration Register
Interupt Masking
SMCLK
SMDATA
ALERT
SYS_SHDN
Figure 1.1 EMC1423/EMC1424 Block Diagram
1.1 Part Selection
The EMC1423 and EMC1424 device configuration is highlighted below.
PART
NUMBER
EMC1423 - 1
SMBUS
ADDRESS
100_1100b
Table 1.1 Part Selection
FUNCTIONALITY
EXTERNAL
DIODES
2
DIODE 1
DEFAULT
CONFIGURATION
Detect Diode w/ REC
enabled
DIODE 2
DEFAULT
CONFIGURATION
Detect Diode w/ REC
enabled
OTHER
Software program-
mable and mask-
able High Limits
Software program-
mable and mask-
able SYS_SHDN
Limits
Hardware set
SYS_SHDN Limit
on External Diode
1
PRODUCT
ID
23h
SMSC EMC1423/EMC1424
7
DATASHEET
Revision 2.0 (08-10-12)

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