參數(shù)資料
      型號(hào): DS3897MX
      廠商: National Semiconductor
      文件頁數(shù): 1/10頁
      文件大?。?/td> 0K
      描述: IC TXRX BTL TRAPEZIODAL 20-SOIC
      標(biāo)準(zhǔn)包裝: 1,000
      類型: 收發(fā)器
      驅(qū)動(dòng)器/接收器數(shù): 4/4
      電源電壓: 4.75 V ~ 5.25 V
      安裝類型: 表面貼裝
      封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
      供應(yīng)商設(shè)備封裝: 20-SOIC
      包裝: 帶卷 (TR)
      其它名稱: *DS3897MX
      OBSOLETE
      SNOSBX0D – JANUARY 1996 – REVISED FEBRUARY 2013
      DS3896/DS3897 BTL Trapezoidal Transceivers
      Check for Samples: DS3896, DS3897
      1
      FEATURES
      DESCRIPTION
      These
      advanced
      transceivers
      are
      specifically
      23
      8 bit DS3896 Transceiver Provides High
      designed to overcome problems associated with
      Package Density
      driving a densely populated backplane, and thus
      4 bit DS3897 Tansceiver Provides Separate
      provide significant improvement in both speed and
      Driver Input and Receiver Output Pins
      data integrity. Their low output capacitance, low
      output signal swing and noise immunity features
      BTL Compatible
      make them ideal for driving low impedance buses
      Less than 5 pF Output Capacitance for Minimal
      with minimum power consumption.
      Bus Loading
      The DS3896 is an octal high speed schottky bus
      1 Volt Bus Signal Swing Reduces Power
      transceiver with common control signals, whereas the
      Consumption
      DS3897 is a quad device with independent driver
      Trapezoidal Driver Waveforms (tr, tf
      6 ns
      input and receiver output pins. The DS3897 has a
      typical) Reduce Noise Coupling to Adjacent
      separate driver disable for each driver and is,
      Lines
      therefore, suitable for arbitration lines. The separate
      driver disable pins (En) feature internal pull ups and
      Temperature Insensitive Receiver Thresholds
      may be left open if not required. On the other hand,
      Track the Bus Logic High Level to Maximize
      the DS3896 provides high package density for
      Noise Immunity in both High and Low States
      data/address lines.
      Guaranteed A.C. Specifications on Noise
      The
      open
      collector
      drivers
      generate
      precise
      Immunity and Propagation Delay Over the
      trapezoidal
      waveforms,
      which
      are
      relatively
      Specified Temperature and Supply Voltage
      independent of capacitive loading conditions on the
      Range
      outputs. This significantly reduces noise coupling to
      Open Collector Driver Output Allows Wire-or
      adjacent lines. In addition, the receivers use a low
      Connection
      pass
      filter
      in
      conjunction
      with
      a
      high
      speed
      comparator, to further enhance the noise immunity
      Advanced Low Power Schottky Technology
      and provide equal rejection to both negative and
      Glitch Free power Up/Down Protection on
      positive going noise pulses on the bus.
      Driver and Receiver Outputs
      To minimize bus loading, these devices also feature a
      TTL Compatible Driver and Control Inputs and
      schottky diode in series with the open collector output
      Receiver Outputs
      that isolates the driver output capacitance in the
      disabled state. The output low voltage is typically “1V”
      and the output high level is intended to be 2V. This is
      achieved by terminating the bus with a pull up resistor
      to 2V at both ends. The device can drive an
      equivalent DC load of 18.5
      Ω (or greater) in the above
      configuration.
      These signaling requirements, including a 1 volt
      signal swing, low output capacitance and precise
      receiver
      thresholds
      are
      referred
      to
      as
      Bus
      Transceiver Logic (BTL).
      1
      Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
      Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
      2
      Trapezoidal is a trademark of dcl_owner.
      3
      All other trademarks are the property of their respective owners.
      PRODUCTION DATA information is current as of publication date.
      Copyright 1996–2013, Texas Instruments Incorporated
      Products conform to specifications per the terms of the Texas
      Instruments standard warranty. Production processing does not
      necessarily include testing of all parameters.
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