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PDF EMC1001 Data sheet ( Hoja de datos )
| Número de pieza | EMC1001 | |
| Descripción | SMBus Temperature Sensor | |
| Fabricantes | Microchip | |
| Logotipo |  |
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EMC1001
±1.5°C SMBus Temperature Sensor in Miniature TSOT
Features
• Self-Contained Internal Temperature Sensor
- +0.25°C resolution
- ±1.5°C Accuracy +40°C to +85°C
• SMBus Address Selected by External Resistor:
- Select 1 of 4 per package, 8 addresses
available
• Maskable Interrupt using ALERT pin
• One-shot Command during Standby
• Low Power, 3.0V to 3.6V Supply
• 47 µA at 0.0625 Conversions per Second
(Typical)
• 4.8 µA in Standby (Typical)
• SMBus 2.0 Compliant interface
• Programmable Temperature Conversion Rate
• Small 6-lead TSOT package
Applications
• Desktop and Notebook Computers
• Thermostats
• Smart batteries
• Industrial/Automotive
• Other Electronic Systems
General Description
The EMC1001 is a tiny SMBus temperature sensor
with ±1.5°C accuracy and two interrupts. Packaged in
a SOT23-6, the EMC1001 provides an accurate,
low-cost, low-current solution for critical temperature
monitoring in a PC or in embedded applications.
The EMC1001 generates two separate interrupts with
programmable thermal trip points. The THERM output
operates as a thermostat with programmable threshold
and hysteresis. The ALERT output can be configured
as a maskable SMBus alert with programmable win-
dow comparator limits, or as a second THERM output.
An efficient fan control system can be created since
this output may be used to control a fan.
A power-down mode extends battery life in portable
applications.
Each part number may be configured to respond to one
of four separate SMBus addresses.
Package Types
EMC1001
6-Lead TSOT
ADDR/THERM 1
GND 2
VDD 3
6 SMDATA
5 ALERT/THERM2
4 SMCLK
2015 Microchip Technology Inc.
DS20005411A-page 1
1 page  
EMC1001
2.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
TSOT
1
2
3
4
5
6
PIN FUNCTION TABLE
Pin Number
Description
ADDR/THERM
GND
VDD
SMCLK
Logic output pin that can be used to turn on/off a fan or throttle a CPU clock
in the event of an overtemperature condition. This is an open-drain output.
This pin is sampled following power-up and the value of the pull-up resistor
determines the SMBus slave address (see Table 1-1). Total capacitance on
this pin must not exceed 100 pF, and the pull-up resistor must be connected
to the same supply voltage as VDD.
Ground pin
Supply Voltage pin, 3.0V to 3.6V
SMBus Clock Input pin
ALERT/THERM2
SMDATA
Logic Output pin used as interrupt, SMBus alert or as a second THERM
output. This is an open-drain output.
SMBus Data Input/Output pin, open-drain output
2015 Microchip Technology Inc.
DS20005411A-page 5
5 Page 
EMC1001
4.4 ADDR/THERM Output
The ADDR/THERM output asserts if the temperature
measurement exceeds the programmable THERM
limit. It can be used to drive a fan or other failsafe
devices. The ADDR/THERM pin is open drain and
requires a pull-up resistor to VDD. The value of this
pull-up resistor determines the slave address per
Table 1-1. The ADDR/THERM pin cannot be masked.
When the ADDR/THERM pin is asserted, it will not
de-assert until the temperature drops below the
THERM limit, minus the THERM Hysteresis value.
Temp
THERM Limit
THERM Limit - THERM Hysterisis
THERM
Hysteresis
FIGURE 4-4:
THERM Response to THERM Limit Exceeded.
4.5 Standby Mode
The EMC1001 can be set to Standby mode (low power)
by setting a bit in the Configuration Register as
described in Section 4.8 “Configuration Register”.
This shuts down all internal analog functions while the
SMBus remains enabled. When the EMC1001 is in
Standby mode, a One-Shot command measurement
can be initiated. The user may also write new values to
the limit registers described in Section 4.10 “Limit
Registers” while in Standby. If the previously stored
temperature is outside any of the new limits, the
ALERT/THERM2 output will respond as described in
Section 4.3 “ALERT/THERM2 Output” and the
ADDR/THERM output will respond as described in
Section 4.4 “ADDR/THERM Output”.
Logic
Level
Logic High
THERM
Time
2015 Microchip Technology Inc.
DS20005411A-page 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet EMC1001.PDF ] | |
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