le79489 Zarlink Semiconductor, le79489 Datasheet - Page 12

• Manufacturer Part Number: le79489
• Description: Subscriber Line Interface Circuit
• Manufacturer: Zarlink Semiconductor

DC FEED CHARACTERISTICS
R
Notes:
Graph is for illustration only.
1.
2.
3a.
3b.
DC
(Volts)
V
V
V
V
V
= R
V
AB
AB
AB
AB
AB
AB
41.5 V
DC1
=
=
=
=
=
+ R
52 V I
0.8
0.8
0.8
I
60
LIMIT
0
DC2
V
V
V
–
0
BAT1
BAT1
BAT1
•
= 11.67 kΩ,
L
RCL I


RDC
------------ -
GDC
+
+
–
R
1.0
2.2
2.2
L
–


L
–
3
–
–
•
I
I
I
L
L
L
RCL


b
a




----------------------- -
5
----------------------- -
----------------------- -
5 GDC
5 GDC
•
RDC
•
•
RDC
RDC
GDC
I
L
Feed current programmed by R
RFA = 0 Ω
Figure 1. DC Feed Characteristics
 , OVH = 0

 , OVH = 1
 , OVH = 1


A
B
b. Feed Programming
Zarlink Semiconductor Inc.
a. Load Line (Typical)
SLIC
No fuse resistors
18.8 mA, 38.8 V
12
RSN
RDC
I
L
(mA)
DC1
2
and R
DC2
OVH = 1
R
R
DC1
DC2
1
C
48.0 mA, 18.5 V
DC
BAT1 = –50 V
50.0 mA
60