
5
Data Device Corporation
www.ddc-web.com
BU-65142 SERIES
V-01/03-0
BU-65142D1
BU-65142F1
DATA BUS
Z0 (70 to 85
55
55
1.4:1
39 VPP
28 VPP
1 FT MAX
2:1
39 VPP
20 VPP
1
8
3
4
1:1.4
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
0.75 Z0
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
DIRECT COUPLED (SHORT STUB)
OR
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
DIRECT COUPLED (SHORT STUB)
BU-65142D2
BU-65142F2
55
55
1:0.83
33 VPP
28 VPP
1 FT MAX
1:0.6
33 VPP
20 VPP
1
8
3
4
1:1.4
0.75 Z0
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
OR
COUPLING
TRANSFORMER
ISOLATION
TRANSFORMER
ISOLATION
TRANSFORMER
DIRECT COUPLED (SHORT STUB)
BU-65142D3
BU-65142F3
55
55
1:2.5
11.6VPP
28 VPP
1 FT MAX
1:1.79
11.6VPP
20 VPP
1
8
3
4
1:1.4
0.75 Z0
TRANSFORMER COUPLED (LONG STUB)
20 FT MAX
28 VPP
OR
Z0
+5V
-15V
)
+5V
-12V
+5V
(70 to 85
)
FIGURE 2. INTERFACE TO 1553 BUS