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| 型號： | BU-61705F4-470S |
| 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, CQFP72 |
| 封裝： | CERAMIC, QFP-72 |
| 文件頁數(shù)： | 26/54頁 |
| 文件大小： | 576K |
| 代理商： | BU-61705F4-470S |
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32
Data Device Corporation
www.ddc-web.com
BU-61703/61705
D1 web-09/02-0
PULSE TRANSFORMERS
In selecting isolation transformers to be used with the Simple
System RT, there is a limitation on the maximum amount of leak-
age 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 specifications.
The maximum allowable leakage inductance is 6.0 H, and
is measured as follows:
The
side
of
the
transformer
that
connects
to
the
Simple System RT 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 6.0 H.
Similarly, if the other side of the primary is shorted to the prima-
ry center-tap, the inductance measured across the “secondary”
(stub side) winding must also be less than 6.0 H.
The difference between these two measurements is the
“differential” leakage inductance. This value must be less than
1.0 H.
Beta Transformer Technology Corporation (BTTC), a subsidiary
of DDC, manufactures transformers in a variety of mechanical
configurations with the required turns ratios of 1:2.5 direct cou-
pled, and 1:1.79 transformer coupled. TABLE 4 provides a listing
of many of these transformers.
For further information, contact BTTC at 631-244-7393 or at
www.bttc-beta.com.
TABLE 4. RECOMMENDED BETA TRANSFORMERS FOR USE WITH SSRT
B-3819
Single epoxy transformer, surface mount, hi-temp solder, 0.625" X 0.625", 0.220" max height.
(May be used with BU-6170XX4 version of SSRT)
B-3310
Dual epoxy transformer, side by side, surface mount, 0.930" X 0.630", 0.155" max height
B-3261
Dual epoxy transformer, side by side, flat pack, 0.930" X 0.630", 0.155" max height
B-3300
LPB-5015
Dual epoxy transformer, side by side, through-hole, 0.930" X 0.630", 0.155" max height
B-3818
HLP-6015
Single metal transformer, hermetically sealed, surface mount, 0.630" X 0.630", 0.175" max height
HLP-6014
Single metal transformer, hermetically sealed, flat pack, 0.630" X 0.630", 0.175" max height
TST-9027
Dual epoxy transformer, twin stacked, flat pack, 0.625" X 0.625", 0.280" max height
TST-9017
Dual epoxy transformer, twin stacked, surface mount, 0.625" X 0.625", 0.280" max height
TST-9007
Dual epoxy transformer, twin stacked, 0.625" X 0.625", 0.280" max height
LPB-5014
Single epoxy transformer, flat pack, 0.625" X 0.625", 0.150" max height
B-3227
Single epoxy transformer, surface mount, 0.625" X 0.625", 0.275" max height
B-3231
Single epoxy transformer, flat pack, 0.625" X 0.625", 0.275" max height
B-3226
Single epoxy transformer, through-hole, 0.625" X 0.625", 0.250" max height
BTTC PART NO.
TRANSFORMER CONFIGURATION
Single epoxy transformer, surface mount, 0.625" X 0.625", 0.150" max height
Single epoxy transformer, through-hole, 0.625" X 0.625", 0.220" max height.
(May be used with BU-6170XX4 version of SSRT)
B-3229
Single epoxy transformer, through hole, transformer coupled only, 0.500" X 0.350", 0.250" max
height
Dual epoxy transformer, side by side, surface mount, 1.410" X 0.750", 0.130" max height
DLP-7115 (see note 3)
Notes:
1. For McAIR version of the Simple System RT (BU-6170XX4), only the B-3818 or B-3819 transformers (shown in bold in the table) may be used.
2. For all other applications, any of the other transformers listed may be used.
3. DLP-7115 operates to +105°C max. All other transformers listed operate to +130°C max..
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