ThePCA9617AisaCMOSintegratedcircuitthatprovideslevelshiftingbetweenlowvoltage(0.8Vto5.5V)andhighervoltage(2.2Vto5.5V)Fast-modePlus(Fm+)I2C-busorSMBusapplications.WhileretainingalltheoperatingmodesandfeaturesoftheI2C-bussystemduringthelevelshifts,italsopermitsextensionoftheI