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      SN74CBT3345C 具有 -2V 下沖保護的 8 位 FET 總線開關

      數據：

      描述

      The SN74CBT3345C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3345C provides protection for undershoot up to ?2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.

      The SN74CBT3345C is organized as an 8-bit bus switch with two output-enable (OE, OE\) inputs. When OE is high or OE\ is low, the bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is low and OE\ is high, the bus switch is OFF and the high-impedance state exists between the A and B ports.

      This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not backflow through the device when it is powered down.

      To ensure the high-impedance state during power up or power down, OE\ should be tied to VCC through a pullup resistor and OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver.

      特性

      • 對A和B端口上的隔離進行下沖保護，最高可達?? 2
      • 雙向數據流，帶近零傳播延遲
      • 低導通電阻（r on ）特性（r on = 3 典型的）
      • 低輸入/輸出電容可最大限度地減少加載和信號失真C io（OFF） = 5.5 pF典型值）
      • 數據和控制輸入提供下沖鉗位二極管
      • 低功耗I CC =3μAMax）
      • V CC 工作范圍4 V至5.5 V
      • 數據I /O支持0至5 V信號電平（0.8 V，1.2 V，1.5 V， 1.8 V，2.5 V，3.3 V，5 V）
      • 控制輸入可由TTL或5 V /3.3 V CMOS輸出驅動
      • I off 支持部分斷電模式操作
      • 閂鎖性能超過每JESD 78 mA，Class II
      • 每個JESD 22測試的ESD性能
        • 2000-V Hu人體模型（A114-B，II類）
        • 1000 V充電設備模型（C101）
      • 支持數字和模擬應用：USB接口，存儲器交錯，總線隔離，低失真信號門控

      參數 與其它產品相比?模擬開關/多路復用器

      ?
      Configuration
      Number of Channels (#)
      Power Supply Type
      Vss (Min) (V)
      Vss (Max) (V)
      Vdd (Min) (V)
      Vdd (Max) (V)
      Ron (Typ) (Ohms)
      Bandwidth (MHz)
      Rating
      Operating Temperature Range (C)
      Package Size: mm2:W x L (PKG)
      Package Group
      Supply Range (Max)
      Ron (Max) (Ohms)
      Input/Output Continuous Current (Max) (mA)
      Supply Current (Max) (uA)
      Features
      OFF-state leakage current (Max) (μA)
      Input/Output ON-state Capacitance (Typ) (pF)
      Input/Output OFF-state Capacitance (Typ) (pF)
      ESD Charged Device Model (kV)
      ESD HBM (kV)
      VIL (Max) (V)
      VIH (Min) (V)
      SN74CBT3345C
      1:1 SPST ? ?
      8 ? ?
      Single ? ?
      N/A ? ?
      N/A ? ?
      4 ? ?
      5.5 ? ?
      3 ? ?
      200 ? ?
      Catalog ? ?
      -40 to 85 ? ?
      20SOIC: 132 mm2: 10.3 x 12.8(SOIC)
      20SSOP: 52 mm2: 6 x 8.65(SSOP)
      20TSSOP: 42 mm2: 6.4 x 6.5(TSSOP) ? ?
      SOIC
      SSOP
      TSSOP ? ?
      5.5 ? ?
      12 ? ?
      128 ? ?
      50 ? ?
      Powered off protection
      -2V undershoot protection ? ?
      10 ? ?
      14 ? ?
      5.5 ? ?
      1 ? ?
      2 ? ?
      0.8 ? ?
      2 ? ?

      技術文檔

      數據手冊（1）
      元器件購買 SN74CBT3345C 相關庫存