MC34216 Datasheet, PDF (1/5 Pages) Motorola, Inc – PROGRAMMABLE TELEPHONE LINE INTERFACE CIRCUIT WITH LOUDSPEAKER AMPLIFIER

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MC34216
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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
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