PBL 3764A/4, /6
R
FB
U
C
HP
U
1
2
-5V
1 HPR
2 RD
HPT 22
VTX 21
VEE 21
RSN 19
AGND 18
RDC 17
C1 16
R
R
D
R
RT
R
1
TX
C
RT
R
3
-
+
R
R
3 DT
B
T
R
R
2
4
-5V
4 DR
R
F1
V
BAT
R
RX
Tip
K1 K1
5 TIPX
R
DC1
V
CODEC/Filter
A
G
B
Ring
6 RINGX
7 BGND
8 VCC
K2 K2
R
C
DC2
TISP
C
C
RC
TC
R
F2
C
U
3
DC
Note 1
+5V
C2 15
+5V
9 RINGRLY
10 VBAT
11 RSG
DET 14
E0 13
D
To other line
interfaces
PTC
D
C
1
K
2
Bat
R
V
R
B
Bat
E1 12
R
SG
-5V
Ringing
+90V
System Control
Interface
(V
)
Bat
RMS
U1
U2
SLIC (Subscriber Line Interface Circuit)
PBL 3764A/4
Combination CODEC/Filter, e.g.
TP3054 or programmable CODEC/
filter, e.g. SLAC
Secondary protection (e.g. Texas
Instruments TISP PBL2)
Relay, 2C contacts, 12V coil
Diode, e.g. 1N4004
Line resistor, 40 Ω, 1%
200 kΩ, 5%, 1/4 W
RBat
RD
5.1 Ω, 5%, 1/4 W
39 kΩ, 5%, 1/4 W
41.2 kΩ, 5%, 1/4 W
24.3 kΩ, 1%, 1/4 W
261 kΩ, 1%, 1/4 W
Short Circuit
523 kΩ, 1%, 1/4 W
20 kΩ, 1%, 1/4 W
150 Ω, 5%, 2W
0.47 µF, 20%, VBat +20 V
1.5 µF, 20%, 10V
0.01 µF, 20%, 100V
0.39 µF, 20%, 100V
C
CTISP
TC, CRC
2200 pF, 20%, 100V
220nF, 20%, 100V
RDC1, RDC2
Note 1. The ground terminals of the
secondary protection should be
connected to the ground terminal of
the SLIC, and to the common ground
on the Printed Board Assembly with a
track as short and wide as possible,
preferable a groundplane.
RFB
RRX
RSG
RT
RTX
RRT
CBat
CDC
CHP
CRT
U3
KR
D1, D2
R
F1, RF2
R1, R3
R2
R4
910 kΩ, 5%, 1/4 W
1.2 MΩ, 5%, 1/4 W
17.8 kΩ, 1%, 1/4 W
RB
Figure 12. Single-channel subscriber line interface with PBL 3764A/4 and combination CODEC/filter.
I
Ldc
V
-2.5 V
TIPX
5
6
BGND
+
17 RDC
TR
V
R
1
TR
L
-
V
Bat
RINGX
I
Ldc
+
V
V
>V
<V
1
0
TR
TR
SG Ref
SG Ref
R
R
Comp.
DC2
-
V
SG Ref
C
DC
RSG 11
4.9 105
17300+RSG
2.9 105
VSG Ref = 12.9 +
0.6
R
DC1
VSG = -7.7
-
SG
V
SG
17300+RSG
Saturation Guard
V
EE
19 RSN
I
Ldc
1000
PBL 3764A/4
Figure 13. Battery feed (C1, C2 = 0,1 active state)
12
ERICSSON [ ERICSSON ]
