55 OHMS
1:1.4
VIN 35 OHMS
55 OHMS
RXEN
TXIN
TXIN
RXIN
RXIN
RECEIVER
2K OHMS
RXOUT
15pF
* TP
RXOUT
15pF
TP
VCC
2K OHMS
TRANSMITTER
TXOUT
1.4:1
55 OHMS
RL = 35 OHMS
A
TXOUT
55 OHMS
Notes:
TXIHB
1. TP = Test point.
2. RL removed for terminal input impedance test.
3. TX and RX tied together.
Figure 6. Direct-Coupled Transceiver with Load
1.4:1
RECEIVER
2K OHMS
2K OHMS
RXOUT
L:N
RXIN
15pF
* TP
VIN
RXIN
RXOUT
15pF
TP
TXIN
RXEN
TRANSMITTER
TXOUT N:L
1:1.4
TXIN
TXIHB
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.
A
TXOUT
55 OHMS
35 OHMS
55 OHMS
Figure 7. Transformer-Coupled Transceiver with Load
8