For more information www.linear.com/LTC485 ELECTRICAL CHARACTERISTICS Note 1: Stresses b" />
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    參數(shù)資料
    

    


    


    
型號：
LTC485IS8#PBF

    

    
廠商：
Linear Technology

    

    
文件頁數(shù)：
8/14頁

    

    
文件大?。?/td>
0K

    

    
描述：
IC TXRX INTRFC RS485 LOPWR 8SOIC

    

    
標準包裝：
100

    

    
類型：
收發(fā)器
    		

    

    
驅動器/接收器數(shù)：
1/1
    		

    

    
規(guī)程：
RS485
    		

    

    
電源電壓：
4.75 V ~ 5.25 V
    		

    

    
安裝類型：
表面貼裝
    		

    

    
封裝/外殼：
8-SOIC（0.154"，3.90mm 寬）
    		

    

    
供應商設備封裝：
8-SOIC
    		

    

    
包裝：
管件
    		

    

    
產(chǎn)品目錄頁面：
1354 (CN2011-ZH PDF)
    		

    

    

    

	
    
    
    

    
    
	
    LTC485
    3
    485fk
    For more information www.linear.com/LTC485
    ELECTRICAL CHARACTERISTICS
    Note 1: Stresses beyond those listed under Absolute Maximum Ratings
    may cause permanent damage to the device. Exposure to any Absolute
    Maximum Rating condition for extended periods may affect device
    reliability and lifetime.
    Note 2: All currents into device pins are positive; all currents out ot device
    pins are negative. All voltages are referenced to device ground unless
    otherwise specified.
    The l denotes the specifications which apply over the full operating
    temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3)
    SWITCHING CHARACTERISTICS The
    l
    denotes the specifications which apply over the full operating
    temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3)
    SYMBOL PARAMETER
    CONDITIONS
    MIN
    TYP
    MAX
    UNITS
    ICC
    Supply Current
    No Load, Pins 2, 3, 4 = 0V or 5V
    Outputs Enabled
    Outputs Disabled
    l
    500
    300
    900
    500
    μA
    IOSD1
    Driver Short-Circuit Current, VOUT = HIGH VO = – 7V
    l
    35
    100
    250
    mA
    IOSD2
    Driver Short-Circuit Current, VOUT = LOW VO = 10V
    l
    35
    100
    250
    mA
    IOSR
    Receiver Short-Circuit Current
    0V ≤ VO ≤ VCC
    l
    7
    85
    mA
    tPLH
    Driver Input to Output
    RDIFF = 54Ω, CL1 = CL2 = 100pF,
    (Figures 3 and 5)
    l
    10
    30
    50
    ns
    tPHL
    Driver Input to Output
    l
    10
    30
    50
    ns
    tSKEW
    Driver Output to Output
    l
    5
    10
    ns
    tr, tf
    Driver Rise or Fall Time
    l
    3
    15
    25
    ns
    tZH
    Driver Enable to Output High
    CL = 100pF (Figures 4 and 6) S2 Closed
    l
    40
    70
    ns
    tZL
    Driver Enable to Output Low
    CL = 100pF (Figures 4 and 6) S1 Closed
    l
    40
    70
    ns
    tLZ
    Driver Disable Time from Low
    CL = 15pF (Figures 4 and 6) S1 Closed
    l
    40
    70
    ns
    tHZ
    Driver Disable Time from High
    CL = 15pF (Figures 4 and 6) S2 Closed
    l
    40
    70
    ns
    tPLH
    Receiver Input to Output
    RDIFF = 54Ω, CL1 = CL2 = 100pF,
    (Figures 3 and 7)
    l
    30
    90
    200
    ns
    tPHL
    l
    30
    90
    200
    ns
    tSKD
    |tPLH – tPHL| Differential Receiver Skew
    l
    13
    ns
    tZL
    Receiver Enable to Output Low
    CRL = 15pF (Figures 2 and 8) S1 Closed
    l
    20
    50
    ns
    tZH
    Receiver Enable to Output High
    CRL = 15pF (Figures 2 and 8) S2 Closed
    l
    20
    50
    ns
    tLZ
    Receiver Disable from Low
    CRL = 15pF (Figures 2 and 8) S1 Closed
    l
    20
    50
    ns
    tHZ
    Receiver Disable from High
    CRL = 15pF (Figures 2 and 8) S2 Closed
    l
    20
    50
    ns
    SYMBOL
    PARAMETER
    CONDITIONS
    MIN
    TYP
    MAX
    UNITS
    VIL
    Input Low Voltage
    DE, DI, RE
    l
    0.8
    V
    IIN1
    Input Current
    DE, DI, RE
    l
    ±2
    μA
    IIN2
    Input Current (A, B)
    DE = 0, VCC = 0V or 5.25V
    VIN = 12V
    C-, I-Grade
    VIN = –7V
    l
    1
    –0.8
    mA
    M-Grade
    VIN = 12V
    VIN = –7V
    l
    2
    –1.6
    mA
    VTH
    Differential Input Threshold Voltage for Receiver –7V ≤ VCM ≤ 12V
    l
    –0.2
    0.2
    V
    ΔVTH
    Receiver Input Hysteresis
    VCM = 0V
    l
    70
    mV
    VOH
    Receiver Output High Voltage
    IO = –4mA, VID = 200mV
    l
    3.5
    V
    VOL
    Receiver Output Low Voltage
    IO = 4mA, VID = –200mV
    l
    0.4
    V
    IOZR
    Three-State (High Impedance) Output Current
    at Receiver
    VCC = Max, 0.4V ≤ VO ≤ 2.4V
    l
    ±1
    μA
    RIN
    Receiver Input Resistance
    –7V ≤ VCM ≤ 12V (C-, I-Grade)
    (M-Grade)
    l
    12
    6
    kΩ
    Note 3: All typicals are given for VCC = 5V and TA = 25°C.
    Note 4: The LTC485 is guaranteed by design to be functional over a supply
    voltage range of 5V ±10%. Data sheet parameters are guaranteed over the
    tested supply voltage range of 5V ±5%.
    
    
    
    
    
    


    


    

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