VCC
55 OHMS
2.5:1
35 OHMS
Vin
55 OHMS
RXEN
TXIN
TXIN
RXIN
RXIN
RECEIVER
2KOHMS
RXOUT
15 pF
RXOUT
* TP
15 pF
TP
2KOHMS
TRANSMITTER
TXOUT
1:2.5
55 OHMS
RL = 35 OHMS
A
TXOUT
55 OHMS
Notes:
TXIHB
1. TP = Test point.
2. RL removed for terminal
input impedance test.
3. TXOUT and RXIN tied together.
TXOUT and RXIN tied together.
Figure 6. Direct Coupled Transceiver with Load
VCC
1.4:1
Vin
1.79:1
RXIN
RXIN
RECEIVER
2KOHMS
RXOUT
15 pF
* TP
RXOUT
15 pF
TP
2KOHMS
TXIN
TRANSMITTER
RXEN
TXOUT 1:1.79
1:1.4
.75 ZO
A
35 OHMS
B
TXIN
TXOUT
.75 ZO
TXIHB
Notes:
1. TP = Test point.
2. RL removed for terminal impedance test.
3. TXOUT and RXIN tied together.
TXOUT and RXIN tied together.
Figure 7. Transformer Coupled Transceiver with Load
7