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Número de pieza | NCT80DBR2G | |
Descripción | Hardware Monitor | |
Fabricantes | ON Semiconductor | |
Logotipo | ||
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No Preview Available ! NCT80
Hardware Monitor with I2C
Serial Interface
The NCT80 is a two−wire serially programmable hardware monitor.
It can monitor its on chip temperature via its local sensor, 7 analog
inputs and measure the speed of two fans. Each of the measured values
are compared with programmable limits and if any channel is outside
the programmed limit an interrupt is generated via the INT output pin.
It also has a chassis intrusion detection input pin which is latched on
an intrusion event.
Communication with the NCT80 is accomplished via the I2C
interface which is compatible with industry standard protocols.
Through this interface the NCT80s internal registers may be accessed.
These registers allow the user to read the current temperature, fan
speed and voltages, change the configuration settings and adjust each
channels limits.
The NCT80 is available in a 24−lead TSSOP package and operates
over a wide supply range of 2.8 to 5.75 V. This makes the NCT80 ideal
for a wide variety of applications ranging from computers to servers
and test equipment.
Features
• On−chipTemperature Sensor
• 2 Fan Speed Monitoring Inputs
• 7 Analog Inputs for Voltage Monitoring
• Chassis Intrusion Detection
• Overtemperature Output
• Limit Comparison of Monitored Channels
• 3 Address Selection Pins
• Power Saving Shutdown Mode
• I2C Compliant Interface
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
http://onsemi.com
TSSOP−24
DB SUFFIX
CASE 948H
XXXXX
XXXXG
ALYW
XXXX
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
PIN CONNECTIONS
1
INT_IN
A2
SDA
A1
SCL A0/NTEST_OUT
TACH1
AIN0
TACH2
AIN1
BTI AIN2
CI AIN3
GND
AIN4
VINDTD
AIN5
AIN6
GPO
AGND
RST_IN/
RST_OUT/
NTEST_IN
(Top View)
THERM
ORDERING INFORMATION
Device
Package
Shipping†
NCT80DBR2G
TSSOP−24
(Pb−Free)
Tape & Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2012
July, 2012 − Rev. 0
1
Publication Order Number:
NCT80/D
1 page NCT80
TYPICAL CHARACTERISTICS
600 600
500 500
400 400
300 300
200 200
100 100
0
2.8
3.3 3.8 4.3 4.8 5.3
VDD (V)
Figure 2. Supply Current vs. VDD
5.8
0
2.8
3.3 3.8 4.3 4.8 5.3
VDD (V)
Figure 3. Supply Current vs. VDD
(Voltage Conversion)
5.8
600 600
500 500
400 400
300 300
200 200
100 100
0
2.8
3.3 3.8 4.3 4.8 5.3
VDD (V)
Figure 4. Supply Current vs. VDD
(Temperature Conversion)
5.8
0
2.8
3.3 3.8 4.3 4.8 5.3
VDD (V)
Figure 5. Shutdown Current vs. VDD
5.8
Figure 6. TUE vs. Code
1.0
0.8
0.6
0.4
0.2
0
−0.2
−0.4
−0.6
−0.8
−1.0
18
29
3 10
4 11
5 12
6 13
7 14
15 22
16 23
17 24
18 25
19 26
20 28
21 29
2.8 3.0 3.3 3.6 4.125 4.5 5.0 5.75
VDD (V)
Figure 7. Local Temp Error vs. VDD
http://onsemi.com
5
5 Page Table 9. REGISTER MAP
Register Name
CONFIGURATIONREGISTER
STATUSREGISTER1
STATUSREGISTER2
MASKREGISTER1
MASKREGISTER2
FAN_DIVISOR_OUTPUT_PIN_CONFIG
OS_CONFIG_TEMP_RESOLUTION
CONVERSION_RATE
CHANNEL_SELECT_REGISTER
CONVERSION_RATE
IN0_READING
IN1_READING
IN2_READING
IN3_READING
IN4_READING
IN5_READING
IN6_READING
TEMP_READING
TACH1_READING
TACH2_READING
IN0_HIGH_LIMIT
IN0_LOW_LIMIT
IN1_HIGH_LIMIT
IN1_LOW_LIMIT
IN2_HIGH_LIMIT
IN2_LOW_LIMIT
IN3_HIGH_LIMIT
IN3_LOW_LIMIT
IN4_HIGH_LIMIT
IN4_LOW_LIMIT
IN5_HIGH_LIMIT
IN5_LOW_LIMIT
IN6_HIGH_LIMIT
IN6_LOW_LIMIT
HOT_TEMP_HIGH_LIMIT
HOT_TEMP_HYSTERESIS_LIMIT
OS_TEMP_HIGH_LIMIT
OS_TEMP_HYSTERESIS_LIMIT
TACH1_COUNT_LIMIT
TACH2_COUNT_LIMIT
MANUFACTURERID
NCT80
Type
RW
RO
RO
RW
RW
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RO
http://onsemi.com
11
Reset Value
0x08
0x00
0x00
0x00
0x00
0x14
0x01
0x00
0x00
0x00
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x1A
Address Offset
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x20
0x21
0x22
0x23
0x24
0x25
0x26
0x27
0x28
0x29
0x2A
0x2B
0x2C
0x2D
0x2E
0x2F
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
0x38
0x39
0x3A
0x3B
0x3C
0x3D
0x3E
11 Page |
Páginas | Total 27 Páginas | |
PDF Descargar | [ Datasheet NCT80DBR2G.PDF ] |
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