PBL388131N 查看數據表（PDF） - Ericsson
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PBL388131N Datasheet PDF : 16 Pages
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PBL 388 13
-Txin 1
+Txin 2
F2out 3
Txout 4
TxDetin 5
TxDetout 6
N Det 7
CMP 8
RxDetout 9
RxDetin 10
Rxout 11
F5out 12
24 CTR
23 LSPin
22 RE
21 RDC
20 +L
19 VOL
18 LSP
17 -C
16 GND
15 V+
14 -Rxin
13 +Rxin
24 pin DIP
Figure 6. Pin configuration.
Pin Descriptions
Refer to figure 6. (24 pin DIP and 24 pin SO package)
Pin
Symbol Description
Pin
1
-Txin
Transmitter channel negative input.
11
Input impedance 3.16 kohm.
2
+Txin Transmitter channel positive input.
12
Input impedance 100 kohm.
3
F2out Output of the second amplifier in the
13
transmitter channel.
4
Txout Transmitter channel output. Min. ac
14
load impedance 10 kohm.
5
TxDetin Input of the transmitter channel signal 15
detector. Input impedance 13 kohm.
6
TxDetout Output of the transmitter channel signal
detector. Goes nagative referred to the 16
internal ref. voltage of appx. 2V when a 17
transmitter signal is present.
18
7
NDet
Background noise detector output.
Goes positive referred to the internal ref.
19
voltage of app. 2V when a background
noise signal is present
8
CMP
Comparator input. External resistance 20
to this point should not be less than
50 kohm. Summing point to the different 21
detector outputs.
22
9
RxDetout Output of the receiver channel signal
23
detector. Goes positive referred to the
internal ref. voltage of appx. 2V when a 24
receiver signal is present
10
RxDetin Input of the receiver channel signal
detector. Input impedance 13 kohm.
-Txin 1
+Txin 2
F2out 3
Txout 4
TxDetin 5
TxDetout 6
N Det 7
CMP 8
RxDetout 9
RxDetin 10
Rxout 11
F5out 12
24 CTR
23 LSP in
22 RE
21 RDC
20 +L
19 VOL
18 LSP
17 -C
16 GND
15 V+
14 -Rxin
13 +Rxin
24 pin SO
Symbol Description
Rxout
F5out
+Rxin
-Rxin
V+
GND
-C
LS
VOL
+L
RDC
RE
LSPin
CTR
Receiver channel output. Min. ac load
impedance 10 kohm.
Output of the second amplifier in the
receiver channel.
Receiver channel positive input. Input
impedance 140 kohm.
Receiver channel negative input. Input
impedance 20 kohm.
Supply of the speech switching circuitry.
A shunt regulator, voltage apprx. 3.3V at
1.0mA.
System ground (- line ).
Loudspeaker power amplifier output.
Volume control input. By sourcing a
current of appx. 0-40 µA into this pin the
gain can be reduced.
Positive supply for the loudspeaker
amplifier.
Power ampl. supply options. Pins - C,
RDC and RE are explained in the text.
Loudspeaker amplifier signal input. Input
impedance 30 kohm.
Control input for gain dynamics
(25 or 50dB), mute and disable.
5
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