PBL 385 70
Maximum Ratings
Parameter
Symbol
Min
Max
Unit
Line voltage, t
p
= 2 s
Line current, continuous DIP
Line current, continuous SO package
Operating temperature range
Storage temperature range
No input should be set on higher level than pin 4 (+C).
V
L
I
L
I
L
T
Amb
T
Stg
0
0
0
-40
-55
18
130
100
+70
+125
V
mA
mA
°C
°C
MUTE
R = 0-4kΩ
L
0 ohm when artificial
line is used
5H+5H
V
M
I
M
I
L
+
R
feed = 400Ω+400Ω
C
ARTIFICIAL
LINE
+ LINE
I
DC2
MIC
Z
Mic = 350Ω
V
3
+
E = 48.5V
V
2
600Ω
V
L
V
DC2
I
DC1
V
DC1
PBL 385 70
with external
components
See fig. 4
REC
V
1
V
4
Z
Rec= 350Ω
- LINE
C = 1µF when artificial line is used
470µF when no artificial line
Figure 2. Test set up without rectifier
bridge.
MUTE
V
M
Uz= 15-16V
I
L
V
I
M
5H+5H
R
RL = 0 - 4kΩ
+ LINE
Z
Mic = 350Ω
MIC
+
feed = 400Ω+400Ω
1µF
V
2
600Ω
L
I
DC2
V
DC2
I
DC1
V
1
V
DC1
V
3
+
E = 50.0V
PBL 385 70
with external
components
See fig. 4
REC
V
4
Z
Rec = 350Ω
- LINE
Figure 3. Test set up with rectifier
bridge.
+Line
1
C9
220n
DTMF
input
10
PBL 385 70
AD
AT
AR
17
R14
310Ω
Rec.
350Ω
R16
Mic.
350Ω
2.7k
12
13
DC-supply
AM
18
8
Mute
(active low)
9
7
Sense input
6
5
11
3
2
R7
910Ω
R8
560Ω
R10
6.2k
15
C6
47n
16
14
R11
62k
+
4
R4
18k
C3
100n
*
R1
DC-output for
external devices
C7
Gain
regulation
+
47µF
R2
*
R5
22k
R6
75Ω
R12
11k
R9
11k
C5
100n
R13
10Ω
R3
910Ω
C2
15n
+
C1
47µF
-Line
Figure 4. Circuit with external compon-
ents for test set up.
* Not used in test set up.
18 pin DIP package.
2
ERICSSON [ ERICSSON ]
