Data Sheet
May 2001
L8576B Dual Ringing SLIC
Pin Information
6
5
4
3
2
1
44 43 42 41 40
NSTATa
NSTATb
NDISCb
7
39
NDISCa
RPWRa
PTa
8
38
37
36
35
RPWRb
PTb
9
10
11
PRb
PRa
VITRb
TG2b
VITRa
TG2a
12
13
34
33
TG1b
RTFLTb
RTTHb
DCOUTb
TG1a
14
15
16
17
32
31
30
29
RTFLTa
RTTHa
DCOUTa
18 19 20 21 22 23 24 25 26 27 28
12-3361(F).a
Figure 3. 44-Pin PLCC Pin Diagram
Table 1. Pin Descriptions
Pin, Pin,
Circuit Circuit Symbol Type
Name/Function
a
b
1
1
2
3
4
5
VBAT
*
—
—
—
—
Iu
Office Battery Supply. Negative high-voltage power supply, nominally –65 V.
Filter Capacitor 2. Connect 0.22 µF capacitor to AGND.
44
43
42
41
CF2
CF1
Filter Capacitor 1. Connect 0.22 µF capacitor to AGND.
BGND*
B2
Battery Ground. Ground return for the battery supply and fault ground.
State Input. Refer to Operating States section. A pull-up device is included.
* On the printed-wiring board (PWB), make the leads to BGND and VBAT 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: Iu and Ou indicate a pull-up device is included on this lead.
Agere Systems Inc.
5
AGERE [ AGERE SYSTEMS ]
