NCT80DBR2G PDF даташит
Спецификация NCT80DBR2G изготовлена «ON Semiconductor» и имеет функцию, называемую «Hardware Monitor». |
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Детали детали
Номер произв | NCT80DBR2G |
Описание | Hardware Monitor |
Производители | ON Semiconductor |
логотип |
27 Pages
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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
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NCT80
ON−CHIP
TEMPERATURE
SENSOR
AIN0 21
AIN1 20
AIN2 19
AIN3 18
AIN4 17
AIN5 16
AIN6 15
TACH1
4
5
TACH2
ANALOG
MUX
Fan
Speed
Counter
A−TO−D
CONVERTER
A2 A1 A0
24 23 22
SDA
2
SCL
3
I2C INTERFACE
Data
Registers
Limit and
Config
Registers
CI
Status Register
NCT80
Interrupt
Control
11 GPO
12 NTEST_IN/
RST_IN
10 INT
13
RST_OUT/
THERM
9 8 14
7 61
VDD GND AGND
CI BTI INT_IN
Figure 1. Functional Block Diagram of NCT80
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1
INT_IN
Active low digital input. This signal is propagated to the INT output pin of the NCT80.
2
SDA
I2C Serial Bi−directional Data Input/Output. Open−drain pin; needs a pull−up resistor.
3 SCL Serial Clock Input. Open−drain pin; needs a pull−up resistor.
4
TACH1
Digital Input. Fan tachometer input to measure speed of Fan.
5
TACH2
Digital Input. Fan tachometer input to measure speed of Fan.
6 BTI Digital Input. Board Temperature Interrupt driven by O.S. outputs of additional temperature sensors
such as the NCT75.
7 CI Digital I/O. An active high input from an external latch which captures a Chassis Intrusion event.
(Chassis Intrusion) This line can go high without any clamping action, regardless of the powered state of the NCT80
8
GND
Power Supply Ground.
9 VDD Positive Supply Voltage. Bypass to ground with a 0.1 mF bypass capacitor.
10 INT Digital Output. Open drain Interrupt Request pin.
11
GPO
Digital Output. An active low open drain output intended to drive an external
P−channel power MOSFET in order to offer software power control.
12 NTEST_IN/RST_IN Dual function pin. Active low input that enables NAND Tree Test functionality. Once enabled the part
is reset to its power on default.
13 RST_OUT/THERM Dual function pin. RST_OUT: Active low reset output pin. THERM:
Overtemperature shutdown output pin.
14
AGND
Analog Ground.
15
AIN6
Analog Input. 0 V to 2.56 V.
16
AIN5
Analog Input. 0 V to 2.56 V.
17
AIN4
Analog Input. 0 V to 2.56 V.
18
AIN3
Analog Input. 0 V to 2.56 V.
19
AIN2
Analog Input. 0 V to 2.56 V.
20
AIN1
Analog Input. 0 V to 2.56 V.
21
AIN0
Analog Input. 0 V to 2.56 V.
22
A0/NTEST_OUT
Dual function pin. Functions as an I2C address selection bit. This is the LSB of the address. Pin also
functions as an output when performing a NAND test.
23 A1 Functions as an I2C address selection bit.
24 A2 Functions as an I2C address selection bit.
http://onsemi.com
2
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NCT80
Table 2. ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Supply Voltage (VDD)
VDD
−0.3 to +6.5
V
Voltage on any input or output pin
−0.3 to VDD + 0.3
V
Input Current at any pin
IIN ±5 mA
Maximum Junction Temperature
TJ(max)
150.7
°C
Storage Temperature Range
TSTG
−65 to 160
°C
ESD Capability, Human Body Model (Note 2)
ESDHBM
2500
V
ESD Capability, Machine Model (Note 2)
ESDCDM
1000
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
2. This device series incorporates ESD protection and is tested by the following methods:
ESD Human Body Model tested per AEC−Q100−002 (EIA/JESD22−A114)
ESD Machine Model tested per AEC−Q100−003 (EIA/JESD22−A115)
Table 3. OPERATING RANGES
Rating
Symbol
Min
Operating Supply Voltage
VDD
2.8
Operating Ambient Temperature Range
TA −40
3. Refer to ELECTRICAL CHARACTERISTICS and APPLICATION INFORMATION for Safe Operating Area.
Max
5.75
125
Unit
V
°C
Table 4. ELECTRICAL CHARACTERISTICS
(TA = TMIN to TMAX, VDD = 2.8 V to 5.75 V. All specifications for −40°C to +125°C, unless otherwise noted.)
Parameter
Test Conditions
Min Typ
POWER SUPPLY CHARACTERISTICS
Supply Voltage
2.8
Supply Current
Interface inactive
Shutdown Current
Shutdown mode enabled
200
TEMPERATURE TO DIGITAL CONVERTER CHARACTERISTICS
Local Sensor Accuracy
VDD = 2.8 V to 5.75 V
Resolution
TA = 0°C to +100°C
TA = −40°C to +125°C
ANALOG−to−DIGITAL CONVERTER CHARACTERISTICS
ADC Resolution (bits)
10
Resolution (10 bits with full−scale at 2.56 V)
2.5
Total Unadjusted Error (TUE)
Differential Nonlinearity (DNL)
Round Robin Cycle Time
662 728
MULTIPLEXER/ADC INPUT CHARACTERISTICS
On resistance
11.5
Input current (on channel leakage current)
±0.005
Off channel leakage current
±0.005
FAN RPM−to−DIGITAL CONVERTER
Fan RPM Error
Full scale count
TA = −40°C to +125°C
TACH1 & TACH2 Nominal Input RPM
Divisor = 1, Fan count = 153
8800
Max
5.75
0.580
±2
±3
0.0625
±1
±1
810
13
±10
255
Unit
V
mA
mA
°C
°C
°C
Bits
mV
%
LSB
ms
kW
mA
mA
%
(max)
rpm
http://onsemi.com
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