使用温度感器TC74多个温度监测节点

TheTC74isaseriallyaccessibledigitaltemperature

sensorthatcandeterminetemperaturesintherangeof

25°Cto85°Cwith±2°absoluteaccuracyor0°Cto

125°Cwith±3°absoluteaccuracy.Temperatureinfor-mationisretrievedfromtheTC74viaatwowire

SMBus/I

2

C

™

compatibleinterface.TheTC74repre-sentsthetemperatureasan8-bittwo’scomplement

signedintegerthathasadirectcorrespondencetothe

device’stemperatureindegreesCresultingina1°tem-peratureresolution.TheTC74isavailableineight

addressversionssothateightdevicescanbemoni-toredonthesametwowireSMBusinterfacewithno

additionalcircuitry.TB050MonitoringMultipleTemperatureNodesUsingTC74ThermalSensorsandaPIC16C505additionalcircuitry,althoughcareshouldbetakentoAuthor:WardBrownensurethatthecombinationofthePIC16C505internalMicrochipTechnologyInc.pull-upimpedancewiththecumulativeloadcapaci-tancemeetsthetimingrequirementsoftheTC74.Proper