SP4082E数据手册集成电路（IC）的驱动器接收器收发器规格书PDF

描述 Description

The SP4082E is designed for reliable, bidirectional communication on multipoint bus transmission lines. The device contains one differential driver and one differential receiver. It is a half-duplex de- vice. The device complys with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compli- ant packages are available.This device is ruggedized for use in harsh operating conditions over the entire common-mode volt- age range from -7V to +\u00182V. Receivers are specially designed to fail-safe to a logic high output state if the inputs are un-driven or shorted. All RS-485 bus-pins are protected against severe ESD events up to ±15kV (Human Body Model). Drivers are protected from excess current flow caused by bus contention or output short-circuits by both an internal current limit and a thermal-overload shutdown. Devices are rated for industrial (-40 to +85oC) operating temperatures. Receivers have exceptionally high input impedance, which places only \u0018/8th 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 device has an independent enable and disable for the driver and receiver and will enter a low power shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance during shutdown or when powered-off.For technical support or help choosing a product please email Exar’s Serial Technical Support group at: serialtechsupport@exar.com.

特性 Features

·5.0V Single Supply Operation
·Controlled Driver Slew Rates 115kbps, Low EMI
·Receiver Failsafe on Open or Shorted Lines
·1/8th Unil Load, 256 Transceivers on Bus
·Robust ESD Protection for RS-485 Pins +/-15KV Human Body Model
·Driver Short Circuit Current Limit and Thermal Shutdown for Overload Protection
·Industry Standard Package Footprints

应用 Application

·Motor Control
·Building Automation
·Security Systems
·Remote Meter Reading