NCT75DR2G Datasheet, PDF (1/14 Pages) ON Semiconductor – Industry Standard Digital Temperature Sensor with 2‐wire Interface

NCT75
Industry Standard Digital
Temperature Sensor with
2‐wire Interface
The NCT75 is a two-wire serially programmable temperature
sensor with an over-temperature/interrupt output pin to signal out of
limit conditions. This is an open-drain pin and can operate in either
comparator or interrupt mode. Temperature measurements are
converted into digital form using a high resolution (12 bit),
sigma-delta, analog-to-digital converter (ADC). The device operates
over the –55C to +125C temperature range.
Communication with the NCT75 is accomplished via the
SMBus/I²C interface. Three address selection pins, A2, A1 and A0,
can be used to connect up to 8 NCT75s to a single bus. Through this
interface the NCT75s internal registers may be accessed. These
registers allow the user to read the current temperature, change the
configuration settings and adjust the temperature limits.
The NCT75 has a wide supply voltage range of 3.0 V to 5.5 V. The
average supply current is 575 mA at 3.3 V. It also offers a shutdown
mode to conserve power. The typical shutdown current is 3 mA.
The NCT75 is available in three, space saving packages – 8-lead
DFN, 8-lead Micro8t and 8-lead SOIC and is also fully pin and
register compatible with the LM75 and TCN75.
Features
 12-bit Temperature-to-Digital Converter
 Input Voltage Range from 3.0 V to 5.5 V
 Temperature Range from −55C to +125C
 SMBus/I²C Interface
 Overtemperature Indicator
 Support for SMBus/ALERT
 Shutdown Mode for Low Power Consumption
 One-shot Mode
 Available in 8-pin DFN, 8-pin Micro8t and SOIC Packages
 These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
 Computer Thermal Monitoring
 Thermal Protection
 Isolated Sensors
 Battery Management
 Office Electronics
 Electronic Test Equipment
 Thermostat Controls
 System Thermal Management
 Semiconductor Components Industries, LLC, 2012
1
August, 2012 − Rev. 3
http://onsemi.com
DFN8
CASE 506AA
SOIC8
CASE 751
Micro8t
CASE 846A
PIN ASSIGNMENT
SDA 1
SCL 2
OS/ALERT 3
GND 4
(Top View)
8 V_DD
7 A0
6 A1
5 A2
MARKING DIAGRAMS
1
XXMG
G
DFN8
8
XXXX
AYWG
G
1
Micro8t
XXXX
M
A
Y
W
G
= Specific Device Code
= Date Code
= Assembly Location
= Year
= Work Week
= Pb-Free Package
(Note: Microdot may be in either location)
8
XXXXX
ALYWX
G
1
SOIC8
XXXXX = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
G
= Pb-Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
Publication Order Number:
NCT75/D