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T4090B-PC bảng dữ liệu(PDF) 2 Page - ATMEL Corporation

tên linh kiện T4090B-PC
Giải thích chi tiết về linh kiện  Monolithic Integrated Feature Phone Circuit EMI Improved
PDF  35 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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T4090B-PC bảng dữ liệu(HTML) 2 Page - ATMEL Corporation

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4741C–CORD–11/05
U4090B-P
1.
Description
The microcontroller-controlled telephone circuit U4090B-P is a linear integrated circuit for use in
feature phones, answering machines and fax machines. It contains the speech circuit, tone
ringer interface with DC/DC converter, sidetone equivalent and ear protection rectifiers. The cir-
cuit is line powered and contains all components necessary for amplification of signals and
adaptation to the line.
An integrated voice switch with loudspeaker amplifier allows loud-hearing or hands-free opera-
tion. With an anti-feedback function, acoustical feedback during loud-hearing can be reduced
significantly. The generated supply voltage is suitable for a wide range of peripheral circuits.
Figure 1-1.
Block Diagram
MC with
EEPROM/
DTMF
Audio
amplifier
Speech
circuit
Voice
switch
Tone
ringer
Loudhearing
and
Tone ringing



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