TEA7089AFP View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TEA7089AFP

LOW-RANGE PHONE DEDICATED CHIP

STMicroelectronics 

TEA7089A

Figure 17 : Test 6 (DTMF)

33Ω

100µF C2

4.7nF

620Ω

600Ω

IL

VCC

13V

82kΩ

1.6kΩ

Sidetone

15kΩ

VCC

1µF

47µF

VREF

560kΩ

100nF

100nF

10µF

10µF

100µF

47Ω

47nF

10µF

3.9kΩ

100nF

82

11

12

3

4 AGC

1 SOFT

GTR 7

26 VRMC

GREC 14

28 DTMF

27 VREF

13 VMC

17 BUZ

TEA7089A

EAR+ 16

EAR- 15

MIC2 6

MIC1 5

18 VRING

IVLS 10

25 24 23 22 21 20 19 9

VREF

1.3kΩ

10kΩ

15kΩ

2.2µF

300Ω

2kΩ

470nF

1N4148

VCC

ILS

47µF

6 bit serial code (00XXXX/Fi/010010) ; OSCIN = 1.79MHz external clock (default mode)

or 3.58MHz external ceramic/crystal (with code ”101000” to select internal oscillator)

15/17

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