Description

The MAX9940 signal-line overvoltage protector for low-voltagedigital communication ports provides protectionagainst high-voltage faults and ESD strikes. TheMAX9940 is especially useful for sensitive communicationprotocols such as Maxim 1-Wire® that cannotafford standard means of fault protection, such as largeseries resistors or large line capacitances.The MAX9940 operates from a single supply voltage of+2.2V to +5.5V and consumes only 13µA of quiescentsupply current. The EXT port is protected up to 28V.The device features a reaction time of 60ns for fastaction during fault conditions and operates over the-40°C to +125°C automotive temperature range.ApplicationsIndustrial EquipmentNotebook ComputersPortable Devices