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SP3085E：Advanced Failsafe RS-485/RS-422 Transceivers 1/8th Unit Load, Slew-Rate Limited, ±15kV ESD-Protected

The SP3080E-SP3088E family of RS-485 devices are designed for reliable, bidirectional communication on multipoint bus transmission lines. Each device contains one differential driver and one differential receiver. The SP3082E, SP3085E and SP3088E are half-duplex devices; other part numbers are full-duplex. All devices comply with TIA/EIA-485 and TIA/EIA-422 standards. Lead-free and RoHS compliant packages are available for all models. These devices are ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7V to +12V. Receivers are 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- 4-2). 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 1/8th the standard load on a shared bus. Up to 256 transceivers may coexist while preserving full signal margin. All devices operate from a single 5.0V power supply and draw negligible quiescent power. All versions except the SP3081E, SP3084E, and SP3087E may independently enable and disable their driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. All outputs maintain high impedance in 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.

技術特性

Half Duplex RS485 Transceiver

5.0V Single Supply Operation

Slew rate controlled driver, Low EMI

500kbps data rate

Receiver failsafe on open, short or terminated lines

1/8th Unit Load, 256 transceivers on bus

Hot Swap glitch protection on control inputs

Driver short circuit current limit and thermal shutdown for overload protection

Ultra-low 400μA Quiescent Current

1μA shutdown mode

Industry standard package footprints

Robust ESD Specifications:

±15KV Human Body Model

±8KV IEC1000-4-2 Contact Discharge

數據手冊S

SP3085E Datasheet

應用指南

AN-207, Advantages of Enhanced Receiver Failsafe Features

AN-214, RS-485 Transient vs. Fault Protection

ANI-13, RS-485 and RS-422 Physical Topologies

ANI-20, Advanced Features of the SP3070E-SP3078E and SP3080E- SP3088E High Performance RS-485 Transceivers

DAN-190, Exar UARTs in RS-485 Applications

產品簡介

Product Brief

Product Change Notification

三月 2012

十二月 2009

七月 2013

五月 2013

七月 2013

十月 2008

規格 參數

電源電壓Vcc(V) 5

發送器數量(Tx) 1

接收器數量(Rx) 1

雙工 Half

數據傳輸速率(kbps) 500

靜電放電ESD(KV) 15

典型關斷集成元件電路(μA) 1

接收開路故障防護 Yes

接收短路故障防護 Yes

關斷 Yes

多點節點 256

訂購型號

器件型號 封裝編碼 最低溫度 最高溫度 狀態

SP3085EEN-L NSOIC8 -40 85 Active

SP3085EEN-L/TR NSOIC8 -40 85 Active

Other

三月 2012 SP4082E

十月 2008 SP4082E

十二月 2009 SP791

七月 2013 SP708

五月 2013 SP3088E

七月 2013 SP4082E

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