
Agere Systems Inc.
5
Data Sheet
May 2001
L8576B Dual Ringing SLIC
Pin Information
12-3361(F).a
Figure 3. 44-Pin PLCC Pin Diagram
Table 1. Pin Descriptions
* On the printed-wiring board (PWB), make the leads to BGND and V
BAT
as wide as possible for thermal and electrical reasons. Also, maxi-
mize the amount of PWB copper on all leads connected to this device for the lowest operating temperature.
Note: I
u
and O
u
indicate a pull-up device is included on this lead.
Pin,
Circuit
a
Pin,
Circuit
b
Symbol
Type
Name/Function
1
44
43
42
41
1
2
3
4
5
V
BAT
*
CF2
CF1
BGND
*
B2
—
—
—
—
I
u
Office Battery Supply.
Negative high-voltage power supply, nominally –65 V.
Filter Capacitor 2.
Connect 0.22
μ
F capacitor to AGND.
Filter Capacitor 1.
Connect 0.22
μ
F capacitor to AGND.
Battery Ground.
Ground return for the battery supply and fault ground.
State Input.
Refer to Operating States section. A pull-up device is included.
7
9
10
11
12
13
14
15
16
17
8
6
4
3
2
1
44
43
42
41
40
5
18
20
21
22
23
24
25
26
27
28
19
39
37
36
35
34
33
32
31
30
29
38
NDISCa
PTa
RPWRa
VITRa
TG2a
TG1a
RTFLTa
RTTHa
PTb
RPWRb
NDISCb
VITRb
TG2b
TG1b
RTFLTb
RTTHb
R
NSTATb
PRb
PRa
R
C
C
V
B
B
B
C
C
B
B
R
NSTATa
DC
OUT
R
I
P
a
R
R
V
C
a
I
P
b
V
C
b
A
A
DC
OUT
b
R
a