TEA7088AFP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TEA7088AFP

LOW-RANGE PHONE DEDICATED CHIP

STMicroelectronics 

TEA7088A

Figure 17 : Test 6 (DTMF)

33Ω

100 F C2

4 .7 nF

620Ω

IL

600Ω

VCC

13V

82 kΩ

1 . 6 kΩ

S ide tone

15kΩ

VCC

1F

47 F

VREF

560kΩ

100nF

100nF

10 F

10 F

100 F

47Ω

47nF

10 F

3 . 9 kΩ

100nF

82

11

12

3

4 AGC

1 SOFT

GTR 7

26 VRMC

GREC 14

28 DTMF

27 VREF

13 VMC

17 BUZ

TEA7088A

EAR+ 16

EAR- 15

MIC2 6

MIC1 5

1 8 VRING

IVLS 10

25 24 23 22 21 20 19 9

VREF

1 . 3 kΩ

1 0kΩ

15kΩ

2.2 F

300Ω

2kΩ

470nF

1 N4 1 4 8

VCC

ILS

47 F

6 bit s e rial code (00XXXX/Fi/010010) ; OSCIN = 1.79MHz e xterna l clock (de fault mode )

or 3.5 8MHz e xterna l ce ramic/crystal (with code ”101 000” to s e lect interna l o s cillator)

15/17

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