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MC34216DW

Programmable Telephone Line Interface Circuit with Loudspeaker Amplifier

Motorola => Freescale 

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MC34216

Product Preview

Programmable Telephone

Line Interface Circuit with

Loudspeaker Amplifier

PROGRAMMABLE

TELEPHONE LINE

INTERFACE CIRCUIT WITH

LOUDSPEAKER AMPLIFIER

The MC34216 is developed for use in telephone applications where

besides the standard telephone functions also the group listening–in feature

is required. In cooperation with a microcontroller, the circuit performs all

basic telephone functions including DTMF generation and pulse dialing. The

listening–in part includes a loudspeaker amplifier, an anti–howling circuit and

a strong supply. In combination with the TCA3385, the ringing is performed

via the loudspeaker.

SEMICONDUCTOR

TECHNICAL DATA

FEATURES

Line Driver and Supply

• DC and AC Termination of the Line

• Selectable Masks: France, U.K., Low Voltage

• Current Protection

• Adjustable Set Impedance for Resistive and Complex Termination

• Efficient Supply Point for Loudspeaker Amplifier and Peripherals

28

1

DW SUFFIX

PLASTIC PACKAGE

CASE 751F

Handset Operation

• Transmit and Receive Amplifiers

• Adjustable Sidetone Network

• Line Length AGC

• Microphone and Earpiece Mute

• Earpiece Gain Increase Switch

• Microphone Squelch Function

• Transmit Amplifier Soft Clipping

Dialing and Ringing

• Generates DTMF, Pilot Tones and Ring Signal

• Interrupter Driver for Pulse–Dialing

• Low Current While Pulse–Dialing

• Optimized for Ringing via Loudspeaker

• Programmable Ring Melodies

• Uses Inexpensive 500 kHz Resonator

Loudspeaking Facility

• Integrated Loudspeaker Amplifier

• Peak–to–Peak Limiter Prevents Distortion

• Programmable Volume

• Anti–Howling Circuitry for Group Listening–In

• Interfacing for Handsfree Conversation

PIN CONNECTIONS

AHO1 1

AHO2 2

MTF 3

MTC 4

AGnd 5

TXI 6

Mic 7

LAO 8

LAI 9

HYN 10

NDC 11

CM 12

IMP 13

SAO 14

28 AGC

27 RXO2

26 RXO1

25 RXI

24 LPI

23 LPO

22 Gnd

21 VCC

20 Iref

19 RS

18 Clk

17 D/HS

16 Osc

15 SAI

(Top View)

Application Areas

• Corded Telephony with Group Listening–In

• Cordless Telephony Base Station with Group Listening–In

• Telephones with Answering Machines

• Fax, Intercom, Modem

ORDERING INFORMATION

Device

Tested Operating

Temperature Range

MC34216DW TA = 0° to +70°C

Package

SO–28L

This document contains information on a product under development. Motorola reserves

© Motorola, Inc. 1995

the right to change or discontinue this product without notice.

MOTOROLA ANALOG IC DEVICE DATA

1

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