NCT80 Datasheet, PDF (1/28 Pages) ON Semiconductor – Hardware Monitor with I2C Serial Interface

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
V_DD
AIN5
INT
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
1
July, 2012 − Rev. 0
Publication Order Number:
NCT80/D