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SP4082E 5V RS-485, Slew Rate Limited 1/8 UL

SP4082E 5V RS-485, Slew Rate Limited 1/8 UL. Hensen Wong January 2008. SP4082E Features. 5V RS-485 15kV ESD HBM 1/8 Unit Load = 256 Transceivers Fail Safe Feature 115kbps, Slew Rate Limited Small SOIC-8 Package Standard Industry Pin out Bi-directional bus on a single-pair wire

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SP4082E 5V RS-485, Slew Rate Limited 1/8 UL

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  1. SP4082E 5V RS-485, Slew Rate Limited 1/8 UL Hensen Wong January 2008

  2. SP4082E Features • 5V RS-485 • 15kV ESD HBM • 1/8 Unit Load = 256 Transceivers • Fail Safe Feature • 115kbps, Slew Rate Limited • Small SOIC-8 Package • Standard Industry Pin out • Bi-directional bus on a single-pair wire • Most commonly used RS-485 architecture Company Confidential

  3. Competitive Analysis Company Confidential

  4. Robust ESD Protection • Enhanced durability for use in demanding applications • Built-in protection against accidental static discharge • ±15kV Human Body Model • Eliminate costly external TVS components Company Confidential

  5. SP4082 “1/8th Unit Load” • A standard RS-485, 1 UL transceiver can drive enough signal to support up to 32 “unit loads” • Requires only 1/8th the input-signal current of standard RS-485 transceivers • Less loading equals more signal margin, better noise rejection • Run with eight times as many transceivers on a multi-drop bus • Support large networks of RS485-connected nodes • Eliminate costly repeaters • 256 maximum instead of 32 • Slew limited may eliminate line-termination • Possible to support HUNDREDSof nodes per network segment (1/8th) Company Confidential

  6. B A R Failsafe Protection • Failsafe protection if inputs either open or shorted • Protects if there is a termination resistor on the line • Protects if bus-driver is off (tri-state) or loses power • Protects if wires were pinched together, bridged or shorted • Most standard RS-485 will only failsafe if the receiver inputs are OPEN • i.e. if the cable is unplugged, inputs floating • Advanced Failsafe guarantees logic 1 if A=B (shorted or open) Company Confidential

  7. Optimized for Distance and Reliability Communicate reliably over long, noisy lines without complex line-termination Low EMI 115kbps Slew Limited: Company Confidential

  8. Remote E-meter Monitoring Applications • Ideal for long cables in noisy environments • Communicate up to 256 nodes • Robust features (ESD and Failsafe) Company Confidential

  9. Industrial Applications Utility Meters, Instrumentation Valves &Actuators Control-Automation • Ideal for long cables in noisy environments • Communicate up to 256 nodes • Robust features (ESD and Failsafe) Remote Monitor Company Confidential

  10. Security Networks • Many nodes, long cable-runs in noisy conditions Control, Pan, Zoom Control and Monitoring AccessPoints Alarms & Sensors Video Surveillance Company Confidential

  11. SP4082 Value Proposition • High ESD Protection • Higher Reliability = Reduced Overhead Cost with Repairs and Maintenance • High Node Count • Only 1/8th Unit Load = 256 transceivers on the bus • Reduce cost with less repeaters and cables • Lowest Supply Current • Lower Power Consumption = Lower Operating Cost Company Confidential

  12. Call to Action • Visit Your Industrial Customers • Communicate the major benefits • High Reliability (15kV ESD Protection) • High Density Network (1/8 UL) • Low Power • Industry Standard Footprints • Get the Design Win! Company Confidential

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