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U3761MB

Low Voltage Standard Telephone Circuit with 13 Memories

Description

TEMIC鈥檚 low voltage telephone circuit, U3761MB

performs all the speech and line interface functions

required in an electronic telephone set, the tone ringer, the

pulse and DTMF dialing with redial, notice function, and

13 memories.

Features

Speech Circuit

D

Last number redial up to 32 digits

D

Three by 32 digits direct (one touch) memory

D

Ten by 16 digits indirect (two touch) memory

D

Notice function up to 32 digits

D

Standard low-cost crystal 3.57 MHz or

ceramic resonator

D

Adjustable DC characteristic

D

Symmetrical input of microphone amplifier

D

Receiving amplifier for dynamic or

piezo-electric earpieces

D

Automatic line loss compensation

Dialer

D

DTMF / pulse switchable

D

Pulse dialling 66/33 or 60/40 or DTMF dialling

selectable by pin

Tone Ringer

D

2 Tone ringer

D

Adjustable volume

D

RC oscillator

D

Adjustable threshold

D

Selectable flashing duration by key pad

D

Pause function

Benefits

D

Low number of external components

D

High quality through one IC solution

TELEFUNKEN Semiconductors

Rev. A2, 23-Apr-97

1 (23)

Preliminary Information

next

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