KA8601C Просмотр технического описания (PDF) - Samsung

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производитель

KA8601C

SPEAKER PHONE WITH SPEECH NETWORK

Samsung 

KA8601C

SPEAKER PHONE WITH SPEECH NETWORK

PIN DESCRIPTION (continued)

Pin No

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

Symbol

RXO+

NC

NC

RXO-

RXI

RXO SUM

ZB

MS

VCC

VDD

TXOATT

TXIATT

VB

PD TX

DETITX2

DETOTX2

DETORX2

DETIRX2

CT

VC

MT

MICI

MICO

DETTX1

DETOTX1

DETORX1

DETIRX1

PD RX

GND

RXI ATT

RXO ATT

DTI

DTO -

Description

RX amp non-inverting differential output.

No connection.

No connection.

RX amp inverting differential output.

Input to the RX amp.

Summed output of the RX current amp.

Input to the RX current amp.

Mode select input. A logic “1” → pulse dialing, A logic “0” → tone (DTMF) dialing.

A supply voltage pin for the speaker phone part.

A regulated 3.3 volt output for an external dialer.

Output of the TX attenuator.

Input to the TX attenuator.

This voltage is a system AC ground, and biases the volume control. A filter cap is required.

An RC at this pin sets the time constant for the TX background monitor.

Input to the TX level detector on the mike/speaker side.

Output of the TX level detector on the mike/speaker side.

Output of the RX level detector on the mike/speaker side.

Input to the RX level detector on the mike/speaker side.

This pin sets the response time for the circuit to switch modes.

Volumn control input.

Mute input. A logic low (<0.8V) sets normal operation. A logic high (>2.0V) mutes the

mic amp.

Input and summing node of the mic amp.

Output of the mic amp is set by external resistors.

Input to the TX level detector on the line side.

Output of the TX level detector on the line side.

Output of the RX level detector on the line side.

Input to the RX level detector on the line side.

A RC at this pin sets the time constant for the RX background monitor.

Ground pin for the speaker phone part.

Input to the RX attenuator and dial tone detector.

Output of the RX attenuator.

Input and summing node of the mic amp.

Output of the first hybrid amplifier.

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