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EMC1438 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EMC1438
기능 Multiple Temperature Sensor
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EMC1438 데이터시트, 핀배열, 회로
EMC1438
1°C Multiple Temperature Sensor
with Hardware Controlled Standby &
Hottest of Multiple Zones
PRODUCT FEATURES
Datasheet
General Description
The EMC1438 is a high accuracy, low cost, System
Management Bus (SMBus) temperature sensor.
Advanced features such as Resistance Error Correction
(REC), Beta Compensation (to CPU diodes requiring the
BJT or transistor model) and automatic diode type
detection combine to provide a robust solution for
complex environmental monitoring applications.
Additionally, the hardware controlled STANDBY pin
allows for system level power shutdown to support
energy saving initiatives.
The EMC1438 monitors up to eight temperature
channels (up to seven external and one internal). The
device provides ±1°C accuracy for the internal and
external diode temperatures.
Temperature monitoring includes two tiers of protection:
one that can be masked and causes the ALERT pin to
be asserted, and the other that cannot be masked and
causes the THERM pin to be asserted.
Applications
„ Notebook Computers
„ Desktop Computers
„ Industrial
„ Embedded Applications
Features
„ Hardware Set Standby Mode
— 200uA (typical) quiescent current in Standby
„ Designed to support 45nm, 65nm, and 90nm CPU
diodes
„ Supports diodes requiring the BJT or transistor model
„ Resistance Error Correction (up to 100 Ohms)
„ Up to seven External Temperature Monitors
— ±1°C Accuracy (40°C < TDIODE < 110°C)
— 0.125°C Resolution
— Supports up to 2.2nF filter capacitor
— Anti-parallel diodes for extra diode support and
compact design
„ Internal Temperature Monitor
— ±1°C Accuracy
— 0.125°C Resolution
„ Programmable temperature limits for ALERT and
THERM
„ 3.3V Supply Voltage
„ SMBus 2.0 interface
— Pin-selectable SMBus address
— Block Read and Write
„ Available in a 16-pin 4mm x 4mm QFN Lead-free
RoHS Compliant package
Block Diagram
DP1
DN1
DP2 / DN3
DN2 / DP3
DP4 / DN5
DN4 / DP5
DP6 / DN7
DN6 / DP7
External
Temp
Diode
Inputs
Anti-
parallel
Diode
Analog
Mux
Internal
Temp
Diode
11 bit Σ Δ
ADC
Voltage to Temp
Conversion
Voltage Register
Temp Registers
Hottest of
Comparison
SMBus
Slave
Protocol
ADDR_SEL
SMCLK
SMDATA
ALERT
THERM
STANDBY
SMSC EMC1438
DATASHEET
Revision 1.0 (04-29-10)




EMC1438 pdf, 반도체, 판매, 대치품
1°C Multiple Temperature Sensor with Hardware Controlled Standby & Hottest of Multiple Zones
Datasheet
6.4
6.5
6.6
6.7
6.8
6.9
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
6.23
6.24
6.25
Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Conversion Rate Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Temperature Limit Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
One Shot Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Therm Hysteresis Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Therm Limit Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
External Diode Fault Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Channel Interrupt Mask Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Consecutive ALERT Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Beta Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Hottest Temperature Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Hottest Temperature Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
High Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Low Limit Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
THERM Limit Status Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
REC Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Hottest Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Channel Configuration Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Filter Control Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Product ID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Manufacturer ID Register (FEh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Revision Register (FFh) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Chapter 7 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.1 EMC1438 Package Drawing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.2 Package Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.2.1 EMC1438 (16-Pin 4mm x 4mm QFN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Chapter 8 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Revision 1.0 (04-29-10)
4
DATASHEET
SMSC EMC1438

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EMC1438 전자부품, 판매, 대치품
1°C Multiple Temperature Sensor with Hardware Controlled Standby & Hottest of Multiple Zones
Datasheet
Chapter 1 Delta
1.1
Delta from EMC1428 to EMC1438
1. Order numbers EMC1438-1 and EMC1438-2.
2. Pin 5 was changed from TRIP_SET to ADDR_SEL.
3. Pin 6 was changed from SYS_SHDN to THERM.
4. Pin 13 was changed from N/C to STANDBY.
5. Added Standby low power state (see Section 5.2, "Power States") and STANDBY register bit (see
Section 6.4, "Configuration Register").
6. Added pin-selectable SMBus address (see Section 4.1.2, "SMBus Address and RD / WR Bit").
7. Added support for SMBus block read and write.
8. Changed default for MASK_ALL bit to 1, which prevents ALERT# pin assertion in interrupt mode
(see Section 6.4, "Configuration Register").
9. Removed SYS_SHDN Configuration Register 1Dh.
10. Changed default Channel Interrupt Mask Register 1Fh from F0h to 00h so all of the enabled
channels will assert the ALERT pin in comparator mode (see Section 6.11, "Channel Interrupt Mask
Register").
11. EMC1438-1 changed default Channel Configuration Register 3Bh from 00h to 0Eh so all of the
DPx/DNx and DNx/DPx pins power up with APD enabled, thereby enabling all temperature
channels at power up (see Section 6.21, "Channel Configuration Register"). EMC1438-2 leaves the
register default set at 00h.
SMSC EMC1438
7
DATASHEET
Revision 1.0 (04-29-10)

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EMC1438

Multiple Temperature Sensor

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