The SP3080E is designed for reliable, bidirectional communication on multipoint bus transmission lines. The device contains one differential driver and one differential receiver. The SP3080E is a full-duplex device. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compliant packages are available for all models. This device is ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7V to +12V. The receiver is a specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events up to 15kV (Air-Gap and Human Body Model) and up to 8kV Contact Discharge (IEC 1000-42). The driver is protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. The device is rated for industrial (-40 to +85C) or extended (-40 to +125C) operating temperatures. The receiver has exceptionally high input impedance, which places only 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin. The device operates from a single 5.0V power supply and draws negligible quiescent power. The SP3080E may independently enable and disable its driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. The output maintains high impedance in shutdown or when powered-off. Rev N 9/15/2006