參數(shù)資料
    型號: LTC1349CSW
    廠商: Linear Technology
    文件頁數(shù): 5/8頁
    文件大?。?/td> 0K
    描述: IC TXRX 5V RS232 LOW PWR 28-SOIC
    標(biāo)準(zhǔn)包裝: 27
    類型: 收發(fā)器
    驅(qū)動器/接收器數(shù): 3/5
    規(guī)程: RS232
    電源電壓: 4.5 V ~ 5 V
    安裝類型: 表面貼裝
    封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
    供應(yīng)商設(shè)備封裝: 28-SOIC
    包裝: 管件
    其它名稱: LTC1349CS
    5
    LTC1349
    1349fa
    UU
    U
    PI FU CTIO S
    DRIVER IN: RS232 Driver Input Pins. Inputs are TTL/
    CMOS compatible. Inputs should not be allowed to float.
    Tie unused inputs to VCC.
    DRIVER OUT: Driver Outputs at RS232 Voltage Levels.
    Outputs are in a high impedance state when in Shutdown
    mode or VCC = 0V. The driver outputs are protected against
    ESD to ±10kV for human body model discharges.
    RX IN: Receiver Inputs. These pins can be forced to ±25V
    without damage. The receiver inputs are protected against
    ESD to ±10kV for human body model discharges. Each
    receiver provides 0.4V of hysteresis for noise immunity.
    RX OUT: Receiver Outputs with TTL/CMOS Voltage Lev-
    els. Receiver 1, 2 and 3 outputs are in a high impedance
    state when in Shutdown mode to allow data line sharing.
    Receivers 4 and 5 are kept alive in Shutdown.
    SWITCHI G TI E WAVEFOR S
    UW
    W
    Figure 1. Driver Propagation Delay Timing
    Figure 2. Receiver Propagation Delay Timing
    1.4V
    0V
    VCC
    0V
    V+
    V
    0V
    DRIVER
    INPUT
    DRIVER
    OUTPUT
    1.4V
    tHLD
    tLHD
    LTC1349 F01
    0.8V
    VCC
    0V
    2.4V
    RX
    INPUT
    RX
    OUTPUT
    1.3V
    tHLR
    1.7V
    tLHR
    LTC1349 F02
    VCC
    0V
    TEST CIRCUITS
    Driver Timing Test Load
    Receiver Timing Test Load
    DRIVER
    INPUT
    3k
    51pF
    DRIVER
    OUTPUT
    LTC1349 TA03
    RX
    RX INPUT
    51pF
    RX
    OUTPUT
    LTC1349 TA04
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