PBL 385 70
Maximum Ratings
Parameter
Symbol
VL
Min
0
Max
18
Unit
V
Line voltage, tp = 2 s
Line current, continuous DIP
Line current, continuous SO package
Operating temperature range
Storage temperature range
IL
IL
TAmb
TStg
0
0
-40
-55
130
100
+70
+125
mA
mA
°C
°C
No input should be set on higher level than pin 4 (+C).
MUTE
VM
R
0
= 0-4kΩ
IM
L
ohm when artificial
line is used
5H+5H
I
L
ARTIFICIAL
LINE
Z
= 350Ω
+ LINE
Mic
+
MIC
R
= 400Ω+400Ω
C
feed
V
3
IDC2
PBL 385 70
with external
components
See fig. 4
V
2
600Ω
+
VDC2
V
E = 48.5V
L
IDC1
Z
= 350Ω
Rec
V
V
1
REC
4
VDC1
- LINE
C = 1µF when artificial line is used
470µF when no artificial line
Figure 2. Test set up without rectifier
bridge.
MUTE
VM
IM
Uz= 15-16V
I
L
R
= 0 - 4kΩ
L
5H+5H
+ LINE
Z
= 350Ω
Mic
+
V
MIC
R
= 400Ω+400Ω
L
1µF
feed
V
3
IDC2
VDC2
PBL 385 70
with external
components
See fig. 4
V
2
600Ω
+
E = 50.0V
IDC1
Z
= 350Ω
Rec
V
V
REC
4
1
VDC1
- LINE
Figure 3. Test set up with rectifier
bridge.
+Line
1
C9
220n
PBL 385 70
10
DTMF
input
17
AD
AM
R14
310Ω
AR
AT
Rec.
R16
12
13
350Ω
18
4
Mic.
350Ω
2.7k
DC-supply
9
+
14
8
7
6
5
11
3
2
15
16
C6
47n
Sense input
R11
62k
R7
910Ω
R10
6.2k
Mute
R4
18k
C3
100n
(active low)
R8
R3
*
Gain
regulation
560Ω
R1
910Ω
Figure 4. Circuit with external compon-
ents for test set up.
R12
11k
R13
10Ω
R6
75Ω
DC-output for
external devices
C2
15n
R5
22k
C5
100n
+
R9
11k
+
*
C7
47µF
R2
C1
47µF
* Not used in test set up.
18 pin DIP package.
-Line
2
ERICSSON [ ERICSSON ]
