參數(shù)資料
    型號: K4S640432H-TC75
    廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
    英文描述: 64Mb H-die SDRAM Specification 54 TSOP-II with Pb-Free
    中文描述: 64兆?芯片與內(nèi)存規(guī)格鉛54 TSOP-II免費
    文件頁數(shù): 11/14頁
    文件大小: 144K
    代理商: K4S640432H-TC75
    SDRAM 64Mb H-die (x4, x8, x16)
    CMOS SDRAM
    Rev. 1.8 August 2004
    1. Parameters depend on programmed CAS latency.
    2. If clock rising time is longer than 1ns, (tr/2-0.5)ns should be added to the parameter.
    3. Assumed input rise and fall time (tr & tf) = 1ns.
    If tr & tf is longer than 1ns, transient time compensation should be considered,
    i.e., [(tr + tf)/2-1]ns should be added to the parameter.
    Notes :
    DQ BUFFER OUTPUT DRIVE CHARACTERISTICS
    Parameter
    Symbol
    Condition
    Min
    Typ
    Max
    Unit
    Notes
    Output rise time
    trh
    Measure in linear
    region : 1.2V ~ 1.8V
    1.37
    4.37
    Volts/ns
    3
    Output fall time
    tfh
    Measure in linear
    region : 1.2V ~ 1.8V
    1.30
    3.8
    Volts/ns
    3
    Output rise time
    trh
    Measure in linear
    region : 1.2V ~ 1.8V
    2.8
    3.9
    5.6
    Volts/ns
    1,2
    Output fall time
    tfh
    Measure in linear
    region : 1.2V ~ 1.8V
    2.0
    2.9
    5.0
    Volts/ns
    1,2
    1. Rise time specification based on 0pF + 50
    to V
    SS
    , use these values to design to.
    2. Fall time specification based on 0pF + 50
    to V
    DD
    , use these values to design to.
    3. Measured into 50pF only, use these values to characterize to.
    4. All measurements done with respect to V
    SS
    .
    Notes :
    AC CHARACTERISTICS
    (AC operating conditions unless otherwise noted)
    Parameter
    Symbol
    60
    70
    75
    Unit
    Note
    Min
    Max
    Min
    Max
    Min
    Max
    CLK cycle time
    CAS latency=3
    t
    CC
    6
    1000
    7
    1000
    7.5
    1000
    ns
    1
    CAS latency=2
    10
    10
    10
    CLK to valid
    output delay
    CAS latency=3
    t
    SAC
    -
    5
    -
    6
    -
    5.4
    ns
    1,2
    CAS latency=2
    -
    6
    -
    6
    -
    6
    Output data
    hold time
    CAS latency=3
    t
    OH
    2.5
    -
    3
    -
    3
    -
    ns
    2
    CAS latency=2
    3
    -
    3
    -
    3
    -
    CLK high pulse width
    t
    CH
    2.5
    -
    3
    -
    2.5
    -
    ns
    3
    CLK low pulse width
    t
    CL
    2.5
    -
    3
    -
    2.5
    -
    ns
    3
    Input setup time
    t
    SS
    1.5
    -
    2
    -
    1.5
    -
    ns
    3
    Input hold time
    t
    SH
    1
    -
    1
    -
    0.8
    -
    ns
    3
    CLK to output in Low-Z
    t
    SLZ
    1
    -
    1
    -
    1
    -
    ns
    2
    CLK to output
    in Hi-Z
    CAS latency=3
    t
    SHZ
    -
    5
    -
    6
    -
    5.4
    ns
    CAS latency=2
    -
    6
    -
    6
    -
    6
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