HI-2579, HI-2581
MIL-STD-1553
BUS A
(Direct Coupled)
Transceiver A
Transceiver B
Isolation
Transformer
BUSA
55Ω
BUSA
55Ω
1:2.5
Isolation
Transformer
BUSB
1:2.5
BUSB
MIL-STD-1553
Stub Coupler
52.5Ω
MIL-STD-1553
BUS B
(Transformer Coupled)
52.5Ω
1:1.4
TXA/B
TXA/B
RXA/B
RXA/B
TXA/B
TXA/B
RXA/B
RXA/B
HI-2579
Figure 3. Bus Connections Example using HI-2579
VDD
Each Bus
Isolation
Transformer
BUSA/B
55Ω
MIL-STD-1553
Transceiver
35Ω
BUSA/B
55Ω
HI-2579
GND
Figure 4. Direct Coupled Test Circuit
VDD
Each Bus
Isolation
Transformer
BUSA/B
MIL-STD-1553
Transceiver
70Ω
BUSA/B
HI-2579
GND
Figure 5. Transformer Coupled Test Circuit
Point
“AD”
Point
“AT”
HOLT INTEGRATED CIRCUITS
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