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    參數(shù)資料
    型號(hào): M87C257-80C6X
    廠商: 意法半導(dǎo)體
    元件分類: DRAM
    英文描述: ADDRESS LATCHED 256K 32K x 8 UV EPROM and OTP EPROM
    中文描述: 地址鎖存256K 32K的× 8紫外線EPROM和檢察官辦公室存儲(chǔ)器
    文件頁數(shù): 2/13頁
    文件大?。?/td> 143K
    代理商: M87C257-80C6X
    A1
    A0
    Q0
    Q1
    Q2
    A7
    A6
    A5
    A4
    A3
    A2
    A13
    A8
    A9
    A11
    G
    A10
    E
    Q7
    Q6
    A14
    Q5
    Q4
    Q3
    VSS
    A12
    ASVPP
    VCC
    AI00929
    M87C257
    8
    9
    10
    11
    12
    13
    14
    1
    2
    3
    4
    5
    6
    7
    16
    15
    28
    27
    26
    25
    24
    23
    22
    21
    20
    19
    18
    17
    Figure 2A. DIP Pin Connections
    Warning:
    NC = Not Connected, DU = Dont’t Use.
    AI00930
    A
    A8
    A9
    A11
    NC
    G
    A10
    E
    Q
    17
    A0
    NC
    Q0
    Q
    Q
    D
    Q
    A6
    A5
    A4
    A3
    A2
    A1
    9
    A
    1
    A
    Q6
    A
    Q7
    32
    D
    V
    M87C257
    A
    Q
    25
    V
    Figure 2B. LCC Pin Connections
    DEVICE OPERATION
    The modes of operation of the M87C257 are listed
    in the Operating Modes. A single power supply is
    required in the read mode. All inputs are TTL levels
    except for V
    PP
    and 12V on A9 for Electronic Signa-
    ture.
    Read Mode
    The M87C257 has two control functions, both of
    which must be logically active in order to obtain
    data at the outputs. Chip Enable (E) is the power
    control and should be used for device selection.
    Output Enable (G) is the output control and should
    Symbol
    Parameter
    Value
    Unit
    T
    A
    Ambient Operating Temperature
    –40 to 125
    °
    C
    T
    BIAS
    Temperature Under Bias
    –50 to 125
    °
    C
    T
    STG
    Storage Temperature
    –65 to 150
    °
    C
    V
    IO (2)
    Input or Output Voltages (except A9)
    –2 to 7
    V
    V
    CC
    Supply Voltage
    –2 to 7
    V
    V
    A9 (2)
    A9 Voltage
    –2 to 13.5
    V
    V
    PP
    Program Supply Voltage
    –2 to 14
    V
    Notes:
    1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings"
    may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other
    conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum
    Rating conditions for extended periods may affect device reliability. Refer also to the SGS-THOMSON SURE Program and other
    relevant quality documents.
    2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC
    voltage on Output is V
    CC
    +0.5V with possible overshoot to V
    CC
    +2V for a period less than 20ns.
    Table 2. Absolute Maximum Ratings
    (1)
    2/13
    M87C257
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