TP8485E-SR ±12K ESD保护，全故障安全RS-485收发器

The TP8485E are 3V~5.5V powered transceivers that meet the RS-485and RS-422 standards for balanced communication.Driver outputs andreceiver inputs are protected against±12kV ESD strikes withoutlatch-up.Transmitters in this family deliver exceptionaldifferential output voltages(2.5V min/5Vcc),into the RS-485required 54Ωload,for better noise immunity,or to allow up to eight120Ωterminations in“star”topologies.These devices have very low buscurrents so they present a true“1/8 unit load”to the RS-485bus.This allows up to 256 transceivers on the network without usingrepeaters.Receiver(Rx)inputs feature a“Full Fail-Safe”design,whichensures a logic high Rx output if Rx inputs are floating,shorted,oron a terminated but undriven bus.Rx outputs feature high drivelevels-typically 25mA VOL=1V(to ease the design of optocoupledisolated interfaces).The TP8485E is available in an SOIC-8 andMSOP-8 package,and is characterized from–40°C to 125°C. FeaturesExceeds Requirements of EIA-485 Standard Hot Plug Circuitry-Txand Rx Outputs Remain Three-State During Power-up/Power-down DataRate:Up to 250 kbps Full Fail-safe(Open,Short,Terminated)Receivers Up to 256 Nodes on a Bus(1/8 unit load) Wide SupplyVoltage 3V to 5.5V SOIC-8 Package for Backward CompatibilityBus-Pin Protection: –±12 kV HBM protection ApplicationsE-Metering Networks Industrial Automation HVAC Systems ProcessControl DMX512-Networks Battery-Powered Applications