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参数资料
| 型号： | BU-65743F3-300 |
| 厂商： | DATA DEVICE CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP80 |
| 封装： | 0.880 INCH, CERAMIC, QFP-80 |
| 文件页数： | 43/75页 |
| 文件大小： | 532K |
| 代理商： | BU-65743F3-300 |
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48
Data Device Corporation
www.ddc-web.com
BU-65743/65843/65863/65864
D-06/04-0
FIGURE 18. PCI MINI-ACE MARK3/MICRO-ACE TE /3.3V TRANSCEIVER INTERFACE TO MIL-STD-1553 BUS
PCI
Mini-ACE Mark3
DATA
BUS
Z
0
55
55
TX/RX
(1:3.75)
7.4
Vpp
28 Vpp
1 FT MAX
Z
0
(1:2.7)
7.4
Vpp
20 Vpp
(1:1.41)
COUPLING
TRANSFORMER
0.75 Z
0
0.75 Z
0
LONG STUB
(TRANSFORMER
COUPLED)
20 FT MAX
28 Vpp
SHORT STUB
(DIRECT COUPLED)
OR
Z
0 =
70 TO 85 OHMS
TRANSFORMER-COUPLED
ISOLATION
TRANSFORMER
BETA B-3372
DIRECT-COUPLED
ISOLATION
TRANSFORMER
BETA B-3383
7 Vpp
PCI
Mini-ACE Mark3
3.3V
.01F
10F
GND
.01F
10F
GND
3.3V TRANSFORMERS (PCI MINI-ACE MARK3/PCI
MICRO-ACE TE WITH 3.3V TRANSCEIVER OPTION)
In selecting 3.3V isolation transformers to be used with the PCI
Mini-ACE Mark3/Micro-ACE TE, there is a limitation on the max-
imum amount of leakage inductance. If this limit is exceeded, the
transmitter rise and fall times may increase, possibly causing the
bus amplitude to fall below the minimum level required by MIL-
STD-1553. In addition, an excessive leakage imbalance may
result in a transformer dynamic offset that exceeds 1553 specifi-
cations.
The maximum allowable leakage inductance is a function of the
coupling method. For Transformer Coupled applications, it is a
maximum of 5.0 H. For Direct it is a maximum of 10.0 H, and
is measured as follows:
The side of the transformer that connects to the device is defined
as the "primary" winding. If one side of the primary is shorted to
the primary center-tap, the inductance should be measured
across the "secondary" (stub side) winding.
This inductance must be less than 5.0 H (Transformer Coupled)
and 10.0 H (Direct Coupled). Similarly, if the other side of the
primary is shorted to the primary center-tap, the inductance
measured across the "secondary" (stub side) winding must also
be less than 5.0 H (Transformer Coupled) and 10.0 H (Direct
Coupled).
The difference between these two measurements is the "differ-
ential" leakage inductance. This value must be less than 1.0 H
(Transformer Coupled) and 2.0 H (Direct Coupled).
Beta Transformer Technology Corporation (BTTC), a subsidiary
of DDC, manufactures 3.3V transformers in a variety of mechan-
ical configurations with the required turns ratios of 1:3.75 direct
coupled, and 1:2.7 transformer coupled. Table 65 provides a list-
ing of these transformers.
For further information, contact BTTC at 631-244-7393 or at
www.bttc-beta.com.
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| BU-65863F3-220 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, CQFP80 |
| BU-65843B3-E02 | 2 CHANNEL(S), 1M bps, MIL-STD-1553 CONTROLLER, PBGA324 |
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