?Semiconductor Components Industries, LLC, 2013
October, 2013 Rev. 3
1
Publication Order Number:
NCT214/D
NCT214
+15C Temperature Monitor
with Series Resistance
Cancellation
The NCT214 is a dual-channel digital thermometer and
undertemperature/overtemperature alarm, intended for use in PCs and
thermal management systems. It is register-compatible with the
ADM1032 and ADT7461. A feature of the NCT214 is series resistance
cancellation, where up to 1.5 kW (typical) of resistance in series with the
temperature monitoring diode can be automatically cancelled from the
temperature result, allowing noise filtering. The NCT214 has a
configurable ALERT
output and an extended, switchable temperature
measurement range.
The NCT214 can measure the temperature of a remote thermal diode
accurate to ?癈 and the ambient temperature accurate to ?癈. The
temperature measurement range defaults to 0癈 to +127癈, compatible
with the ADM1032, but it can be switched to a wider measurement
range of 64癈 to +191癈.
The NCT214 communicates over a 2-wire serial interface,
compatible with system management bus (SMBus/I
2
C) standards. The
NCT214 has two address pins which allow up to 9 NCT214s to be used
on the same bus.
An ALERT
output signals when the on-chip or remote temperature is
out of range. The THERM
output is a comparator output that allows
on/off control of a cooling fan. The ALERT
output can be reconfigured
as a second THERM
output, if required.
Features
" On-chip and Remote Temperature Sensor
" 0.25?/SPAN>C Resolution/1?/SPAN>C Accuracy on Remote Channel
" 1?/SPAN>C Resolution/1?/SPAN>C Accuracy on Local Channel
" Series Resistance Cancellation Up to 1.5 kW
" Extended, Switchable Temperature Measurement Range
0癈 to +127癈 (Default) or 64癈 to +191癈
" Register-compatible with ADM1032 and ADT7461
" 2-wire SMBus/I
2
C Serial Interface with SMBus Alert Support
" Programmable Over/Undertemperature Limits
" Offset Registers for System Calibration
" Up to Two Overtemperature Fail-safe THERM
Outputs
" 240 mA Operating Current, 5 mA Standby Current
" This Device is Pb-Free, Halogen Free and is RoHS Compliant
Applications
" Desktop and Notebook Computers
" Industrial Controllers
" Smart Batteries
" Automotive
" Embedded Systems
MARKING DIAGRAM
http://onsemi.com
PIN ASSIGNMENT
See detailed ordering and shipping information in the package
dimensions section on page 18 of this data sheet.
ORDERING INFORMATION
WDFN10
CASE 522AA
(Note: Microdot may be in either location)
NCT
214
ALYWG
G
(Top View)
ADD0
SCLK
SDATA
ALERT
/THERM2
GND
ADD1
V
DD
D+
D
THERM
1
NCT214 = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb-Free Package
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