47
Data Device Corporation
www.ddc-web.com
BU-6474X/6484X/6486X
J-07/05-0
+5.0 VOLT ISOLATION TRANSFORMERS
In selecting isolation transformers to be used with the Mini-ACE
Mark3 / Micro-ACE-TE, there is a limitation on the maximum
amount of leakage inductance. If this limit is exceeded, the trans-
mitter 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 Mini-ACE Mark3
/ Micro-ACE-TE is defined as the “primary” winding. If one side
of the primary is shorted to the primary center-tap, the induc-
tance 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 primary 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 47 provides a list-
ing of many of these transformers.
For further information, contact BTTC at 631-244-7393 or at
www.bttc-beta.com.
DSS-1005
Dual epoxy transformer, side by side, surface mount, transformer coupled or direct coupled
depending on pins selected, 0.960” x 0.575” x 0.165” max. height.
LPB-5015
TLP-1005
HLP-6015
Dual epoxy transformer, side by side, surface mount, 0.930" X 0.630", 0.155" max height
DLP-7215
Dual epoxy transformer, side by side, surface mount, 1.410" X 0.750", 0.130" max height
Single metal transformer, hermetically sealed, surface mount, 0.630" X 0.630", 0.175" max height
TLP-1105
HLP-6014
Dual epoxy transformer, side by side, flat pack, 0.930" X 0.630", 0.155" max height
Single metal transformer, hermetically sealed, flat pack, 0.630" X 0.630", 0.175" max height
TLP-1205
Dual epoxy transformer, side by side, through-hole, 0.930" X 0.630", 0.155" 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
B-3819
LPB-5014
Single epoxy transformer, surface mount, hi-temp solder, 0.625" X 0.625", 0.220" max height.
May be used with BU-6XXXXX4 versions of the Mini-ACE Mark3 / Micro-ACE-TE
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-3818
B-3067
B-3226
Single epoxy transformer, through-hole, 0.625" X 0.625", 0.220" max height.
May be used with BU-6XXXXX4 versions of the Mini-ACE Mark3 / Micro-ACE-TE
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
B-3229
Single epoxy transformer, through hole, transformer coupled only, 0.500" X 0.350", 0.250" max height
TABLE 47. BTTC TRANSFORMERS FOR USE WITH 5.0 VOLT Mini-ACE Mark3 / MICRO-ACE-TE
Notes:
1. For the BU-6XXXXX4 versions of the Mini-ACE Mark3 / Micro-ACE-TE, which include the McAir-compatible transceivers, only the B-3818 or B-3819 transformers
(shown in bold in the table) may be used.
2. For the BU-6XXXXX3 versions of the Mini-ACE Mark3 / Micro-ACE-TE with -1553B transceivers, any of the transformers listed in the table may be used.
3. The list of approved transformers for use with Mini-ACE Mark3 / Micro-ACE-TE is constantly being updated. Please see the Beta Transformer Technology Corporation
web site (www.bttc-beta.com) for the latest transformer configuration information.