PBL38812 Ver la hoja de datos (PDF) - Ericsson

Número de pieza

componentes Descripción

Fabricante

PBL38812

Voice-switch circuit for Handsfree speakerphone TAM

Ericsson  

PBL 388 12

CTR 1

-Txin 2

+Txin 3

F2out 4

Txout 5

TxDetin 6

TxDetout 7

NDet 8

16 GND

15 +V

14 -Rxin

13 F5out

12 Rxout

11 RxDetin

10 RxDetout

9 CMP

F2out 1

Txout 2

TxDetin 3

TxDetout 4

N Det 5

CMP 6

RxDetout 7

Rx Detin 8

Rxout 9

18 +Txin

17 -Txin

16 CTR

15 NC

14 GND

13 +V

12 -Rxin

11 +Rxin

10 F5out

16-pin SO

18-pin DIP

Figure 4. Pin configuration.

Pin Descriptions:

Refer to figure 4. (16-pin SO and 18-pin DIP package)

Pin Pin

SO DIP Symbol Description

Pin Pin

SO DIP Symbol

Description

1 16 CTR

Control input for gain dynamics

9 6 CMP

Comparator input..

(25 or 50dB), mute and disable.

Summing point to the different

2 17 -Txin

Transmitter channel negative input.

detector outputs.

Input impedance 3 kohm.

10 7 RxDetout Output of the receiver channel signal

3 18 +Txin

Transmitter channel positive input.

Input impedance 100 kohm.

4 1 F2out

Output of the second amplifier in the

transmitter channel.

5 2 Txout

Transmitter channel output. Min. ac

load impedance 10 kohm.

6 3 TxDetin Input of the transmitter channel signal

detector. Input impedance 13 kohm.

7 4 TxDetout Output of the transmitter channel signal

detector. Goes nagative referred to the

internal ref. voltage of app. 2V when a

11 8 RxDetin

12 9 Rxout

13 10 F5out

11 +Rxin

detector. Goes positive referred to the

internal ref. voltage of app. 2V when a

receiver signal is present

Input of the receiver channel signal

detector. Input impedance 13 kohm.

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.

transmitter signal is present.

14 12 -Rxin

Receiver channel negative input. Input

8 5 NDet

Background noise detector output.

impedance 20 kohm.

Goes positive referred to the internal ref. 15 13 V+

Supply of the speech switching

voltage of app. 2V when a backgrounud

circuitry. A shunt regulator, voltage

noise signal is present

apprx. 3.3V at 1.0mA.

16 14 GND

System ground.

15 NC

Not connected.

5

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