NCT210 Datasheet, PDF (1/16 Pages) ON Semiconductor – Low Cost Microprocessor System Temperature Monitor Microcomputer

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
V_DD 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
1
September, 2012 − Rev. 2
Publication Order Number:
NCT210/D