MC34216DW Ver la hoja de datos (PDF) - Motorola => Freescale

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MC34216DW

Programmable Telephone Line Interface Circuit with Loudspeaker Amplifier

Motorola => Freescale 

MC34216

Simplified Block Diagram

DC and AC

Termination

Line +

Handset

Earpiece

Handset

MIcrophone

Base

Loudspeaker

Ear

Mic

LSP

DC Mask Generation

AC Termination

2–4 Wire Conversion

Anti–

Howling

DTMF and

Ring

Generator

Supply

Stabilizer

Line Driver

Microcontroller

Interface

This device contains 6,507 active transistors.

Line –

CIRCUIT DESCRIPTION

With the MC34216, a microcontroller and a switched mode

power supply, a telephone set with listening–in function and

ringing via loudspeaker can be built as shown in Figure 1.

The block diagram of the MC34216 (see Figure 2),

shows the basic blocks of the device plus the essential

external components.

Hookswitch

Figure 1. Telephone Concept with MC34216

Z1

Z0

Z21

T2

VCC

A/B

Handset

MC34216

Micro

SMPS

Loudspeaker

R1

Gnd

MOTOROLA ANALOG IC DEVICE DATA

3

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