參數(shù)資料
    型號: CAT24WC256
    元件分類: DRAM
    英文描述: 64K 8K x 8 Battery-Voltage CMOS E2PROM
    中文描述: 64K的8K的× 8電池電壓的CMOS E2PROM的
    文件頁數(shù): 3/7頁
    文件大?。?/td> 92K
    代理商: CAT24WC256
    CAT24C01B
    3
    Doc. No. 25085-00 7/99 S-1
    A.C. CHARACTERISTICS
    VCC = +1.8V to +6.0V, CL=1TTL Gate and 100pF (unless otherwise specified).
    Read & Write Cycle Limits
    Symbol
    Parameter
    1.8V, 2.5V
    4.5V-5.5V
    Min.
    Max.
    Min.
    Max.
    Units
    FSCL
    Clock Frequency
    100
    400
    kHz
    TI(1)
    Noise Suppression Time
    100
    ns
    Constant at SCL, SDA Inputs
    tAA
    SCL Low to SDA Data Out
    3.5
    1
    s
    and ACK Out
    tBUF(1)
    Time the Bus Must be Free Before
    4.7
    1.2
    s
    a New Transmission Can Start
    tHD:STA
    Start Condition Hold Time
    4
    0.6
    s
    tLOW
    Clock Low Period
    4.7
    1.2
    s
    tHIGH
    Clock High Period
    4
    0.6
    s
    tSU:STA
    Start Condition Setup Time
    4.7
    0.6
    s
    (for a Repeated Start Condition)
    tHD:DAT
    Data In Hold Time
    0
    ns
    tSU:DAT
    Data In Setup Time
    250
    100
    ns
    tR(1)
    SDA and SCL Rise Time
    1
    0.3
    s
    tF(1)
    SDA and SCL Fall Time
    300
    ns
    tSU:STO
    Stop Condition Setup Time
    4.7
    0.6
    s
    tDH
    Data Out Hold Time
    100
    ns
    Note:
    (1) This parameter is tested initially and after a design or process change that affects the parameter.
    (2) tPUR and tPUW are the delays required from the time VCC is stable until the specified operation can be initiated.
    The write cycle time is the time from a valid stop
    condition of a write sequence to the end of the internal
    program/erase cycle. During the write cycle, the bus
    interface circuits are disabled, SDA is allowed to remain
    high, and the device does not respond to its input.
    Write Cycle Limits
    Symbol
    Parameter
    Min.
    Typ.
    Max
    Units
    tWR
    Write Cycle Time
    10
    ms
    Power-Up Timing(1)(2)
    Symbol
    Parameter
    Max.
    Units
    tPUR
    Power-up to Read Operation
    1
    ms
    tPUW
    Power-up to Write Operation
    1
    ms
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