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PBL38812

Voice-switch circuit for Handsfree speakerphone TAM

Ericsson  

PBL 388 12

Maximum Ratings

Parameter

Speech switch supply current

Voltage pin 1-14

Operating temperature

Storage temperature

Symbol

I

D

TAmb

TStg

Min

-0,5

-20

-55

Max

Unit

10

mA

Vpin15+0.5 V

+70

°C

+125

°C

ID

+

15 V +

V+

RxDetin 11

PBL 388 12

RxDetout 10

GND

16

100nF

V Ref

Figure 2. Isolation and measurement of VRef. Reference figure No.2.

+

V Txout

R Txout

V+

ID

10 µF

+

+

100µF/16V

15 V+

5 Txout

F2out

R F2 out

10 µF CTx

+

I Txin

4.7 µF

+

V Txin

+

1 µF

6 TxDetin PBL 388 12

4 F2out

3 +Txin

2-Tx in

N Det

8

TxDetout

7

CMP

9

Rx Detout

10

C TxDet + 0,1µF

CRxDet +

GND 16

Rxout 12

Rx Detin 11

F5out 13

-Rx in

CTR 14

1

R CTR

10 µF

+

VRxout

R Rxout

CRx 10 µF

+

F5out

1 µF

+

I Rxin

RF5out

VRxin

NDet

I TxDet

VNDet

V TxDet

I RxDet

VCMP

VRxDet

I CTR

VCTR

Figure 3. Test circuit. Reference figure No. 3.

2

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