|
|
PDF NCT210 Data sheet ( Hoja de datos )
| Número de pieza | NCT210 | |
| Descripción | Low Cost Microprocessor System Temperature Monitor Microcomputer | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de NCT210 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
NCT210
Low Cost Microprocessor
System Temperature
Monitor Microcomputer
The NCT210 is a two-channel digital thermometer and
under/overtemperature alarm, intended for use in personal computers
and other systems requiring thermal monitoring and management. The
device can measure the temperature of a microprocessor using a
diode-connected PNP transistor, which can be provided on-chip with
the processor, or can be a low cost discrete NPN/PNP device, such as
the 2N3904/2N3906. A novel measurement technique cancels out the
absolute value of the transistor’s base emitter voltage so that no
calibration is required. The second measurement channel measures the
output of an on-chip temperature sensor to monitor the temperature of
the device and its environment.
The NCT210 communicates over a two-wire serial interface
compatible with SMBus standards. Under/overtemperature limits can
be programmed into the device over the serial bus, and an ALERT
output signals when the on-chip or remote temperature is out of range.
This output can be used as an interrupt or as an SMBus alert.
Features
• Alternative to the ADM1021A
• On-chip and Remote Temperature Sensing
• No Calibration Necessary
• 1°C Accuracy for On-chip Sensor
• 3°C Accuracy for Remote Sensor
• Programmable Over/Undertemperature Limits
• Programmable Conversion rate
• 2-wire SMBus Serial Interface
• Supports System Management Bus (SMBus) Alert
• 200ĂmA Max Operating Current
• 1ĂmA Standby Current
• 3.0ĂV to 5.5ĂV Supply
• Small 16-lead QSOP Package
• This Device is Pb-Free, Halogen Free and is RoHS Compliant
Applications
• Desktop Computers
• Notebook Computers
• Smart Batteries
• Industrial Controllers
• Telecom Equipment
• Instrumentation
http://onsemi.com
QSOP−16
CASE 492
PIN ASSIGNMENT
NC 1
VDD 2
D+ 3
D− 4
NC 5
ADD1 6
GND 7
GND 8
NCT210
(Top View)
16 NC
15 STBY
14 SCLK
13 NC
12 SDATA
11 ALERT
10 ADD0
9 NC
NC = No Connect
MARKING DIAGRAM
NCT210
#YYWW
NCT210
#
YYWW
= Specific Device Code
= Pb-Free Package
= Date Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
© Semiconductor Components Industries, LLC, 2012
September, 2012 − Rev. 2
1
Publication Order Number:
NCT210/D
1 page  
NCT210
TYPICAL PERFORMANCE CHARACTERISTICS
20
15
10
5 D+ To GND
0
−5
−10 D+ To VDD
−15
−20
−25
−30
1
10 100
LEAKAGE RESISTANCE (MW)
Figure 3. Temperature Error vs. PC Board Track
Resistance
9
100 mV p-p
8
7
6
5
4
3 50 mV p-p
2
1
0 25 mV p-p
1 10 100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 5. Temperature Error vs. Common-mode
Noise Frequency
5
4
250 mV p-p REMOTE
3
2
100 mV p-p REMOTE
1
0
100 1k 10k 100k 1M 10M 100M
FREQUENCY (Hz)
Figure 4. Temperature Error vs. Power Supply
Noise Frequency
14
12
10
8
6
4
2
0
−2
2 4 6 8 10 12 14 16 18 20 22 24
CAPACITANCE (nF)
Figure 6. Temperature Error vs. Capacitance
between D+ and D−
70
60
50
40
30
20 VDD = 3.3 V
10
VDD = 5 V
0
1 5 10 25 50 75 100 250 500 750 1000
SCLK FREQUENCY (kHz)
Figure 7. Standby Supply Current vs. Clock
Frequency
4
3
10 mV p-p
2
1
0
100k
1M
10M 100M
1G
FREQUENCY (Hz)
Figure 8. Temperature Error vs. Differential-mode
Noise Frequency
http://onsemi.com
5
5 Page 
NCT210
before the 10th clock pulse, then high during the
10th clock pulse to assert a stop condition.
Any number of bytes of data can be transferred over the
serial bus in one operation, but it is not possible to mix read
and write in one operation, because the type of operation is
determined at the beginning and cannot subsequently be
changed without starting a new operation.
For the NCT210, write operations contain either one or
two bytes, while read operations contain one byte.
To write data to one of the device data registers or read
data from it, the address pointer register must be set so that
the correct data register is addressed, data can then be written
into that register or read from it. The first byte of a write
operation always contains a valid address that is stored in the
address pointer register. If data is to be written to the device,
the write operation contains a second data byte that is written
to the register selected by the address pointer register.
This is illustrated in Figure 13. The device address is sent
over the bus followed by R/W set to 0. This is followed by
two data bytes. The first data byte is the address of the
internal data register to be written to, which is stored in the
address pointer register. The second data byte is the data to
be written to the internal data register.
SCLK
1
91
9
SDATA
A6
START BY
MASTER
A5 A4 A3 A2 A1 A0
FRAME 1
SERIAL BUS ADDRESS BYTE
R/W D7
ACK. BY
NCT210
SCLK (CONTINUED)
1
D6 D5 D4 D3 D2 D1 D0
ACK. BY
FRAME 2
NCT210
ADDRESS POINTER REGISTER BYTE
9
SDATA (CONTINUED)
D7 D6 D5 D4 D3 D2 D1 D0
FRAME 3
DATA BYTE
ACK. BY
NCT210
STOP BY
MASTER
Figure 13. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register
SCLK
1
91
9
SDATA
A6
START BY
MASTER
A5 A4 A3 A2 A1 A0
FRAME 1
SERIAL BUS ADDRESS BYTE
R/W D7
ACK. BY
NCT210
D6 D5 D4 D3 D2 D1 D0
ACK. BY
FRAME 2
NCT210
ADDRESS POINTER REGISTER BYTE
STOP BY
MASTER
Figure 14. Writing to the Address Pointer Register Only
SCLK
1
91
9
SDATA
A6
START BY
MASTER
A5 A4 A3 A2 A1 A0
FRAME 1
SERIAL BUS ADDRESS BYTE
R/W
ACK. BY
NCT210
D7
D6 D5 D4 D3 D2 D1 D0
NO ACK. BY
FRAME 2
MASTER
DATA BYTE FROM NCT210
Figure 15. Reading Data from a Previously Selected Register
STOP BY
MASTER
When reading data from a register there are two
possibilities:
1. If the NCT210’s address pointer register value is
unknown or not the desired value, it is first
necessary to set it to the correct value before data
can be read from the desired data register. This is
done by performing a write to the NCT210 as
before, but only the data byte containing the
register read address is sent, because data is not to
be written to the register. This is shown in
Figure 14.
A read operation is then performed consisting of
the serial bus address, R/W bit set to 1, followed
http://onsemi.com
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NCT210.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| NCT210 | Low Cost Microprocessor System Temperature Monitor Microcomputer | ON Semiconductor |
| NCT214 | Temperature Monitor | ON Semiconductor |
| NCT218 | High Accuracy Temperature Monitor | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |