參數(shù)資料
    型號: BU-61586S3-122L
    廠商: DATA DEVICE CORP
    元件分類: 微控制器/微處理器
    英文描述: 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQIP70
    封裝: 1.900 X 1 INCH, 0.165 INCH HEIGHT, LOW PROFILE, CERAMIC, DIP-70
    文件頁數(shù): 27/44頁
    文件大?。?/td> 298K
    代理商: BU-61586S3-122L
    33
    INTERFACE TO MIL-STD-1553 BUS
    FIGURE 18 illustrates the interface from the various versions of
    the ACE series terminals to a 1553 bus. The figure also indicates
    connections for both direct (short stub) and transformer (long
    stub) coupling, plus the peak-to-peak voltage levels that appear
    at various points (when transmitting).
    TABLE 35 lists the characteristics of the required isolation trans-
    formers for the various ACE terminals, the DDC and Beta
    Transformer Technology Corporation corresponding part num-
    ber, and the MIL (DESC) drawing number (if applicable). Beta
    Transformer Technology is a direct subsidiary of DDC.
    For both coupling configurations, the isolation transformer is the
    transformer that interfaces directly to the ACE component. For
    the transformer (long stub) coupling configuration, the trans-
    former that interfaces the stub to the bus is the coupling trans-
    former. The turns ratio of the isolation transformer varies,
    depending upon the peak-to-peak output voltage of the specific
    ACE terminal.
    The transmitter voltage of each model of the BU-65170/61580
    varies directly as a function of the power supply voltage. The
    turns ratios of the respective transformers will yield a secondary
    voltage of approximately 28 volts peak-to-peak on the outer taps
    (used for direct coupling) and 20 volts peak-to-peak on the inner
    taps (used for stub coupling).
    In accordance with MIL-STD-1553B, the turns ratio of the cou-
    pling transformer is 1.0 to 1.4. Both coupling configurations
    require an isolation resistor to be in series with each leg con-
    necting to the 1553 bus; this protects the bus against short cir-
    cuit conditions in the transformers, stubs, or terminal compo-
    nents.
    Notes for TABLE 35 and FIGURE 18:
    (1) Shown for one of two redundant buses that interface to the BU-65170 or BU-
    61580.
    (2) Transmitted voltage level on 1553 bus is 6 Vp-p min, 7 Vp-p nominal, 9 Vp-p
    max.
    (3) Required tolerance on isolation resistors is 2%. Instantaneous power dissipa-
    tion (when transmitting) is approximately 0.5 W (typ), 0.8 W (max).
    (4) Transformer pin numbering is correct for the DDC (e.g., BUS-25679) trans-
    formers. For the Beta transformers (e.g., B-2203) or the QPL-21038-31 transform-
    ers (e.g., M21038/27-02), the winding sense and turns ratio are mechanically the
    same, but with reversed pin numbering; therefore, it is necessary to reverse pins
    8 and 4 or pins 7 and 5 for the Beta or QPL transformers (Note: DDC transformer
    part numbers begin with a BUS- prefix, while Beta transformer part numbers
    begin with a B- prefix).
    (5)The B-2204, B-2388, and B-2344 transformers have a slightly different turns
    ratio on the direct coupled taps then the turns ratio of the BUS-29854 direct cou-
    pled taps. They do, however, have the same transformer coupled ratio. For trans-
    former coupled applications, either transformer may be used. The transcevier in
    the BU-65170X2 and the BU-61580X2 was designed to work with a 1:0.83 ratio
    for direct coupled applictions. For direct coupled applications, the 1.20:1 turns
    ration is recommended, but the 1.25:1 may be used. The 1.25:1 turns ratio will
    result in a slightly lower transmitter amplitude. (Approximateley 3.6% lower) and a
    slight shift in the ACE's receiver threshold.
    TABLE 35. ISOLATION TRANSFORMER GUIDE
    RECOMMENDED XFORMER
    TURNS RATIO
    ACE PART
    NUMBER
    SURFACE
    MOUNT
    PLUG-IN
    XFORMER
    COUPLED
    DIRECT
    COUPLED
    BUS-25679,
    B-2203,
    M21038/27
    -03
    2:1
    1.41:1
    LPB-5001
    LPB-5008
    LPB-6001
    LPB-6008
    BUS-29854
    B-2204,
    M21038/27
    -03
    1:0.6
    1.20:1
    1.25:1
    (Note 5)
    B-3227
    ( supersedes
    B-3072 )
    B-3226
    ( supersedes
    B-3067 )
    1:1.79
    1:2.5
    BU-65170X1
    BU-65171X1
    BU-61580X1
    BU-61581X1
    BU-61585X1
    BU-61586X1
    BU-65170X3
    BU-65171X3
    BU-61580X3
    BU-61581X3
    BU-61585X3
    BU-61586X3
    BU-65170X6
    BU-65171X6
    BU-61580X6
    BU-61581X6
    BU-61585X6
    BU-61586X6
    BU-65170X2
    BU-65171X2
    BU-61580X2
    BU-61581X2
    BU-61585X2
    BU-61586X2
    B-2387
    M21038/27
    -12,
    M21038/27
    -17
    LPB-5002
    LPB-5009
    LPB-6002
    LPB-6009
    B-2388
    M21038/27
    -13,
    B-2334,
    M21038/27
    -18
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