le79555 Zarlink Semiconductor, le79555 Datasheet - Page 13

• Manufacturer Part Number: le79555
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

DC FEED CHARACTERISTICS
Regions:
1.
2.
Constant current region:
Battery tracking anti-sat:
50
48
46
44
42
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
0
R
0
L
2
4
I
L
6
8
A (TIP)
Figure 2.
B (RING)
Figure 3. Feed Programming
10
R
V
V
Zarlink Semiconductor Inc.
DC
AB
AB
12
=
=
= |BAT| − V
SLIC
Loop Current (mA)
I
R
L
Load Line (Typical)
DC1
14
R
L
13
'
=
+
RSN
RDC
16
---------- - R
R
R
625
2
DC
DC2
Diode
18
L
'
− 7.2 V − I
20
,
where R
22
24
R
R
L
DC1
DC2
(R
L
1
'
DC
=
26
R
/210)
L
28
+
2R
C
F
30
DC