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TEMIC Semiconductors - Multi Standard Feature Phone Integrated Circuit

Numéro de référence U3810BM
Description Multi Standard Feature Phone Integrated Circuit
Fabricant TEMIC Semiconductors 
Logo TEMIC Semiconductors 





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U3810BM fiche technique
TELEFUNKEN Semiconductors
U3810BM
Multi Standard Feature Phone Integrated Circuit
Description
The U3810BM multi-standard feature phone circuit is
designed to be used with a microcontroller using a 2-wire
serial bus. It performs all speech and line interface
functions required in an electronic telephone set: the
ringing function with switching regulator and melody
generator, the DTMF dialling, the loudhearing with
antilarsen and antidistortion systems, a power supply, a
clock and a reset for the microcontroller. Transmit, receive
and loudhearing gains control / AGC range / DTMF
frequencies, pre-emphasis and level / melody generator,
and mutes are programmable through the serial bus.
Block diagramm
Speech
circuit
LH
Loudhearing
and
Tone ringing
DTMF
dialer
Tone
ringer
Figure 1
MC
with
EEPROM
93 7600 e
Applications
D Feature phones
D Answering machines
D Fax machines
Rev. A1: 19.01.1996
Benefits
D Complete system integration of analog signal
processing and digital control circuitry
D One IC for various PTT standards, e.g. programmable
specification via mC
D Only three low-cost transducers needed (instead of
four)
1 (31)

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