NCT75DR2G 12bit 800uA Digital Temperature Sensors

• 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 Micro8 and SOIC Packages
• These Devices are Pb-Free, Halogen Free/BFR Free and are RoHS Compliant

General Description

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 A at 3.3 V. It also offers a shutdown
mode to conserve power. The typical shutdown current is 3 A.

The NCT75 is available in three, space saving packages – 8-lead DFN, 8-lead Micro8 and 8-lead SOIC and is also fully pin and register
compatible with the LM75 and TCN75.