TP8485E

± 18K ESD Protection, Full Fail-Safe RS-485 Transceiver

Datasheet

TP8485E.pdf

产品特性

  • Exceeds Requirements of EIA-485 Standard

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

  • Data Rate: Up to 250 kbps

  • Full Fail-safe (Open, Short, Terminated)Receivers

  • Up to 256 Nodes on a Bus (1/8 unit load)

  • Wide Supply Voltage 3V to 5.5V

  • SOIC-8 Package for Backward Compatibility

  • Bus-Pin Protection:±18 kV HBM protection

典型应用

  • E-Metering Networks

  • Industrial Automation

  • HVAC Systems

  • Process Control

  • DMX512-Networks

  • Battery-Powered Applications


产品概述

The TP8485E are 3V~5.5V powered transceivers that meet the RS-485 and RS-422 standards for balanced communication. Driver outputs and receiver inputs are protected against ±18kV ESD strikes without latch-up.Transmitters in this family deliver exceptional differential output voltages (2.5V min/5Vcc), into the RS-485 required 54Ω load, for better noise immunity, or to allow up to eight 120Ω terminations in “star” topologies.


These devices have 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. Rx outputs feature high drive levels- typically 25mA @ VOL= 1V (to ease the design of optocoupled isolated interfaces).The TP8485E is available in an SOIC-8 and MSOP-8 package, and is characterized from –40°C to 125°C.

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