U4090B Datasheet PDF - TEMIC Semiconductors
| Part Number | U4090B | |
| Description | Monolithic Integrated Feature Phone Circuit | |
| Manufacturers | TEMIC Semiconductors | |
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Monolithic Integrated Feature Phone Circuit
U4090B
Description
The µc controlled telephone circuit U4090B 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 circuit 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 loudhearing or handsfree operation. With an
anti-feedback function, acoustical feedback during
loudhearing can be reduced significantly. The generated
supply voltage is suitable for a wide range of peripheral
circuits.
Features
D DC characteristic adjustable
D Transmit and receive gain adjustable
D Symmetrical input of microphone amplifier
D Anti-clipping in transmit direction
D Automatic line loss compensation
D Symmetrical output of earpiece amplifier
D Built-in ear protection
D DTMF and MUTE input
D Adjustable sidetone suppression independent
of sending and receiving amplification
D Speech circuit with two sidetone networks
D Built-in line detection circuit
D Integrated amplifier for loudhearing operation
D Anti-clipping for loudspeaker amplifier
D Improved acoustical feedback suppression
D Power down
D Voice switch
D Tone ringer interface with dc/dc converter
D Zero crossing detection
D Common speaker for loudhearing and tone ringer
D Supply voltages for all functional blocks of a
subscriber set
D Integrated transistor for short circuiting the line
voltage
D Answering machine interface
D Operation possible from 10 mA line currents
Benefits
D Savings of one piezo electric transducer
D Complete system integration of analog signal proces-
sing on one chip
D Very few external components
Applications
Feature phone, answering machine, fax machine, speaker
phone
Speech
circuit
Voice
switch
Audio
amplifier
Tone
ringer
Loudhearing
and
Tone ringing
MC with
EEPROM/
DTMF
94 8741
TELEFUNKEN Semiconductors
Rev. C1, 28-Oct-96
Preliminary Information
1 (34)
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Typical value of external components
C1 100 nF
C2 4.7 nF
C3 10 mF
C4 220 mF
C5 47 mF
C6 470 mF
C7 820 nF
C8 100 mF
C9 100 nF
C10 150 nF
C11 68 nF
C12 33 nF
C13 10 mF
C14 100 nF
C15 F1 m
C16 47 mF
C17 10 mF
C18
F10 m
C19 68 nF
C20 68 nF
C21 1 mF
C22 100 nF
C23 6.8 nF
C24 10 nF
C25 100 nF
C26 470 nF
C27 33 nF
L1 2.2 mH
R1 27 kW
R2 20 kW
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
R30
R31
U4090B
> 68 kW
10 W
1.5 kW
62 kW
680 kW
22 kW
330 W
3 kW
62 kW
30 kW
62 kW
120 kW
47 kW
1 kW
1.2 W
30 kW
6.8 kW
6.8 kW
15 kW
330 kW
220 kW
68 kW
2 kW
3.3 kW
18 kW
2 kW
1 kW
12 kW
56 kW
TELEFUNKEN Semiconductors
Rev. C1, 28-Oct-96
Preliminary Information
5 (34)
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for U4090B electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ U4090B.PDF Datasheet ] | |
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