PBL 385 82
+L
1
TO
2
TI
3
+C
4
-L
5
GR
6
18
17
16
15
14
13
12
11
10
RE 2
RE 1
-L
RI
-L
NA
NA
NA
NA
+L
1
TO
2
TI
3
+C
4
-L
5
GR
6
NA
7
NA
8
NA
9
NA
10
20
19
18
17
16
15
14
13
12
11
RE2
RE1
-L
RI
-L
NA
NA
NA
NA
NA
+L
1
TO
2
TI
3
+C
4
-L
5
GR
6
NA
7
NA
8
16
15
14
13
12
11
10
9
RE2
RE1
-L
RI
-L
NA
NA
NA
NA
7
NA
8
NA
9
18-pin DIP
20-pin SO
16-pin SO
Figure 5. Pin configuration.
Pin Descriptions
Refer to figure 5.
DIP
1
2
SO 20 SO 16
1
2
1
2
Name
+L
TO
Function
Output of the transmitter amplifier. Connected to the line through a
polarity guard diode bridge.
Output of the transmitter amplifier. Connected through a resistor of 47 to 100 ohm to -L.
Sets the DC-charateristic of the circuit.The output has a low AC output impedance and
the signal is used to drive a side tone balancing network.
Input of transmit amplifier. Input impedance 17 kΩ
±
20 %.
The positive power supply terminal for most of the circuitry inside the PBL 385 82
(about 1 mA current consumption). The +C-pin is to be connected to a decoupling
capacitor of 47
µF
to 150
µF.
The control input for the gain regulation in the receiver.
3
4
3
4
3
4
TI
+C
6
5
14
16
15
17
18
7
8
9
10
11
12
13
6
5
16
18
17
19
20
7
8
9
10
11
12
13
14
15
4
6
5
12
14
13
15
16
7
8
9
10
11
GR
-L
RI
RE2
RE1
NA
NA
NA
NA
NA
NA
NA
NA
NA
}
}
The negative power terminal, connected to the line through a polarity guard diode
bridge.
Input of the receive signal amplifier. Input impedance is 38 kohm
±
20 %.
The receive signal amplifier outputs. Output impedance is approximately 3 ohm.
ERICSSON [ ERICSSON ]
