?Semiconductor Components Industries, LLC, 2012
September, 2012 Rev. 2
1
Publication Order Number:
NCT210/D
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 transistors 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?/SPAN>C Accuracy for On-chip Sensor
" 3?/SPAN>C Accuracy for Remote Sensor
" Programmable Over/Undertemperature Limits
" Programmable Conversion rate
" 2-wire SMBus Serial Interface
" Supports System Management Bus (SMBus) Alert
" 200mA Max Operating Current
" 1mA Standby Current
" 3.0V to 5.5V 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
See detailed ordering and shipping information in the package
dimensions section on page 14 of this data sheet.
ORDERING INFORMATION
MARKING DIAGRAM
PIN ASSIGNMENT
QSOP16
CASE 492
SCLK
NC
STBY
NC
SDATA
ADD0
NC
ALERT
NC
V
DD
D+
D
NC
ADD1
GND
GND
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
NCT210
NC = No Connect
(Top View)
NCT210 = Specific Device Code
#
= Pb-Free Package
YYWW
= Date Code
NCT210
#YYWW
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