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VIN
RL =
55 OHMS
55 OHMS
35 OHMS
A
2K OHMS
2K OHMS
RECEIVER
TRANSMITTER
TP
TP
*
1:1.4
1.4:1
RXIN
RXEN
TXIN
TXOUT
RXOUT
TXIHB
55 OHMS
55 OHMS
35 OHMS
Notes:
1. TP = Test point.
2. RL removed for terminal input impedance test.
3. TX and RX tied together.
RXIN
TXIN
TXOUT
15pF
15pF
VCC
RXOUT
Figure 6. Direct-Coupled Transceiver with Load
VIN
Figure 7. Transformer-Coupled Transceiver with Load
1:1.4
2K OHMS
2K OHMS
RECEIVER
TP
TP
TRANSMITTER
55 OHMS
55 OHMS
35 OHMS
A
TXIHB
TXIN
RXEN
TXOUT
N:L
L:N
1.4:1
RXIN
RXOUT
*
Notes:
1. TP = Test point.
2. N:L Ratio is dependent on power supply voltage.
3. RL removed for terminal input impedance test.
4. TX and RX tied together.
RXIN
TXIN
TXOUT
RXOUT
15pF
15pF