2-Channel Digital Thermometer with Under/Overtemperature Alarm

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Overview

The NCT210 is a two-channel digital thermometer and over/undertemperature alarm, intended for use in personal computers and other systems requiring thermal monitoring and management. The device can measure the temperature of a microprocessor using a diode-connected PNP transistor, which can be provided on-chip with the processor, or can be a low cost discrete NPN/PNP device, such as the 2N3904/2N3906. A novel measurement technique cancels out the absolute value of the transistor's base emitter voltage so that no calibration is required. The second measurement channel measures the output of an on-chip temperature sensor to monitor the temperature of the device and its environment. The NCT210 commumicates over a two-wire serial interface compatible with SMBus standards. Under/overtemperature limits can be programmed into the device over the serial bus, and an /ALERT output signals when the on-chip or remote temperature is out of range. This output can be used as an interrupt or as an SMBus alert.

  • Thermal Management
  • Temperature Sensing
  • Smart Electric Meters
  • DSL Line Cards
  • Alternative to the ADM1021A
  • On-Chip and Remote Temperature Sensing
  • No Calibration Necessary
  • 1°C Accuracy for On-Chip Sensor
  • 3°C Accuracy for the Remote Sensor
  • Programmable Over/Undertemperature Limits
  • Programmable Conversion rate
  • 2-Wire SMBus Serial Interface
  • Supports System Management Bus (SMBus) Alert
  • 1 µA Standby Current
  • 3.0 V to 5.5 V Supply

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Status

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

Sensor Type

Data Transmission Standard

ICC Max (mA)

VCC Min (V)

VCC Max (V)

T Min (°C)

T Max (°C)

Temperature Error (°C)

Reference Price

NCT210RQR2G

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Obsolete

CAD Model

Pb

A

H

P

QSOP-16

1

260

REEL

2500

N

Local & Remote

SMBus

0.37

3

5.5

-65

125

±3

Price N/A

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