TPT7481/TPT7482 Isolated Full- and Half-Duplex RS485 Transce

The TPT7481 is a±15 kV IEC61000 ESD protected,3.0 V~5.5 V isolated RS485 transceivers that meet the RS-485 and RS-422 standards for Half Duplex communication.The TPT7482 is isolated Full Duplex RS485.The TPT748x features a fail-safe receiver,which support the output of the receiver to be logic high when the differential input(bus pin A/B)of the receiver is open,short or idle.Transmitters in this family deliver exceptional differential output voltages into the RS-485 required 54Ωload.The 20 Mbps device has very low bus currents so they present a true“1/8 unit load”to the RS-485 bus.This allows up to 256 transceivers on the network without using repeaters.Receiver(Rx)inputs feature a“Full Fail-Safe”design,which ensures a logic high Rx output if Rx inputs are floating,shorted,or on a terminated but undriven bus.The TPT748x is available in WSOP-16 package and is characterized from−40°C to+125°C.

　　Features

　　ŸExceeds Requirements of EIA-485 Standard

　　ŸHot Plug Circuitry-Tx and Rx Outputs Remain

　　Three-State During Power-up/Power-down

　　ŸSupply voltage:3.0 V~5.5 V

　　ŸData Rate:20 Mbps isolated RS485

　　ŸFull Fail-safe Receiver(Open,Short,Terminated)

　　Ÿ5 kVRMS Isolation Rating

　　Ÿ±200 kV/μs typ static CMTI,±150 kV/μs typ

　　dynamic CMTI

　　ŸLatch-Up performance exceeds 600 mA

　　ŸBus-Pin Protection(Between Bus pins and

　　GNDB)

　　−±15 kV IEC 61000-4-2 Contact Discharge

　　−±18 kV IEC 61000-4-2 Air Discharge

　　ŸSafety-Related Certifications:

　　−VDE Certification according to DIN VDE V

　　0884-17(IEC60747-17)

　　−5000VRMS(WSOP16,WSOP8),3750VRMS

　　(SOP8)Isolation Rating per UL 1577

　　−CQC Certification per GB 4943.1

　　−CAS,TUV and CB certifications

　　Applications

　　ŸHome Appliance

　　ŸMotor Drives

　　ŸIndustrial Control

　　ŸCommunication Infrastructure