am79c30a Advanced Micro Devices, am79c30a Datasheet - Page 78

• Manufacturer Part Number: am79c30a
• Description: Digital Subscriber Controller ?dsc ?circuit
• Manufacturer: Advanced Micro Devices

78
Notes:
1. V
2. R
3. C
4. R
5. R
LOUT2
LOUT1
(see Figure 28).
LOUT2
LOUT1
(s-interface)
L
L
1
3
and R
Figure 26. Equivalent Test Load
is the termination impedence at the S interface.
is the effective capacitance at the S interface.
and R
+
–
LIN1
LIN2
2
4
are the transmitter output series resistors; their value depends upon the characteristics of the pulse transformer
are required for multipoint operation to prevent loading of the line when power is removed from the terminal.
: Transmitter output at the S-interface reference point.
V
+
–
LOUT
Conditions
V
50 ohms
50 ohms
LOUT
200 ohms
R
R
R
R
R
L
2
1
3
4
Figure 25. System Interface to LIU
09893H-19
C
Am79C30A/32A Data Sheet
L
= 200 pF
2 : 1
2 : 1
a
P
U
Between LOUT2 and LOUT1 (Using the
Figure 27. Differential Output Signals
R
R
L
L
High Mark
High Mark
a
V
b
LOUT
Test Circuit in Figure 24)
50%
b
C
C
L
L
c
b
Low Mark
Low Mark
P
+
W
V
V
(s-reference)
(s-reference)
c
09893H-19
09893H-20
50%