TPT7488 Isolated RS485 transceiver

The TPT7487 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 TPT7488 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 54 Ω load. The 500 kbps 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 

 Exceeds Requirements of EIA-485 Standard 

 Hot Plug Circuitry - Tx and Rx Outputs Remain Three-State During Power-up/Power-down 

 Supply voltage: 3.0 V ~ 5.5 V 

 Data Rate: 500 kbps isolated RS485 

 Full Fail-safe Receiver (Open, Short, Terminated) 

  Up to 5 kV RMS Isolation Rating 

 10 kV Surge Capability 

 ±150 kV/μs CMTI 

 Latch-Up performance exceeds 500 mA 

 Bus-Pin Protection: − ±12 kV IEC61000-4-2 Contact Discharge − ±15 kV IEC61000-4-2 Air Discharge 

 Safety-Related Certifications: − VDE Reinforced Insulation according to DIN VDE V 0884-11: 2017-01 − 5000 Vrms Isolation Rating per UL 1577 − CSA C22.2 No. 62368-1:19 3rd, IEC 62368- 1:2018 Ed. 3 and EN 62368-1:2020 − TUV Certification according to EN 60950-1 and EN 61010-1 − CQC Certification per GB4943.1-2011 Applications 

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