Low Voltage, High
Monitor with I2C Interface
The NCT203 is a digital thermometer and undertemperature/
overtemperature alarm, intended for use in thermal management
systems requiring low power and size. The NCT203 operates over a
supply range of 1.4 V to 2.75 V making it possible to use it in a wide
range of applications including low power devices.
The NCT203 can measure the ambient temperature accurate to
±1.75°C. The device operates over a wide temperature range of −40 to
The NCT203 has a configurable ALERT output and over−
temperature shutdown THERM pin.
Communication with the NCT203 is accomplished via the I2C
interface which is compatible with industry standard protocols.
Through this interface the NCT203s internal registers may be
accessed. These registers allow the user to read the current
temperature, change the configuration settings and adjust limits.
An ALERT output signals when the on−chip temperature is out of
range. The THERM output is a comparator output that can be used to
shut down the system if it exceeds the programmed limit. The ALERT
output can be reconfigured as a second THERM output, if required.
• Small DFN Package
• On−Chip Temperature Sensor
• Low Voltage Operation: 1.4 V to 2.75 V
• Low Quiescent Current:
♦ 44 mA Normal Mode (max)
♦ 20 mA Shutdown (max)
• Power Saving Shutdown Mode
• Operating Temperature Range of −40°C to 125°C
• 2−wire I2C Serial Interface
• Programmable Over/Undertemperature Limits
• This is a Pb−Free Device
• Smart Phones, Tablet PCs, Satellite Navigation, Smart Batteries
J2 = Specific Device Code
M = Date Code
G = Pb−Free Device
(*Note: Microdot may be in either location)
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
June, 2013 − Rev. 2
Publication Order Number: