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U4030B の電気的特性と機能

U4030BのメーカーはTEMIC Semiconductorsです、この部品の機能は「Telephone Speech Circuit」です。


製品の詳細 ( Datasheet PDF )

部品番号 U4030B
部品説明 Telephone Speech Circuit
メーカ TEMIC Semiconductors
ロゴ TEMIC Semiconductors ロゴ 




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U4030B Datasheet, U4030B PDF,ピン配置, 機能
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Telephone Speech Circuit
U4030B
Description
The U4030B is an electronic speech circuit for standard
and feature telephones. It replaces the hybrid transformer,
earphone and microphone interface and the supply
voltage generation for external components, e.g. dialer or
microcomputers. Using the U4030B in telephone circuit
designs can improve transmission quality and results in
cost savings through shorter and more flexible design
procedures. It reduces the amount of external components
needed. The U4030B uses TEMIC’s reliable bipolar
technology and is offered in a SO20 package.
Features
D Microphone amplifier with
– Symmetrical input
– Privacy function
– Anticlipping
D Built in ear protection
D Power down input
D Mute input
D DTMF interface
D Low line impedance during pulse dialing
Benefits
D Independent adjustment of
– Transmission gain
– Receiving gain
– Sidetone suppression
– Frequency response
D Low-impedance supply voltage for all external blocks
D Supply voltage for an electret microphone
Applications
D Standard telephone
D Fax machine
D Answering machine
D Cordless telephone
Block Diagram
10
DTMF
PRIV
MIC1
MIC2
16
12
13
GT MICO
11 9
+
ST
5
+
TXA
GR RECO
67
+–
Ear protection
REC.ATT.
4 CK
Limiter
3
CLIM
Mute
8
MUTE
17
PD
Power supply
U 4030 B
14
GND
18 1
SWAMP VM
15 VL
19 RDC
2 VC
20
VD
Figure 1.
Ordering Information
93 7618 e
Extended Type Number
U4030B-AFL
U4030B-AFLG3
Package
SO20
SO20
Remarks
Taped and reeled
Rev. A2, 27-Jan-98
1 (14)

1 Page





U4030B pdf, ピン配列
U4030B
Circuit Description
Reference for all descriptions is figure 9, unless otherwise
specified.
Power Supply
DC characteristic
The power supply stage determines the voltage/ current
characteristic of the circuit. The DC-slope is adjusted to
100 W. A resistor connected from Pin 2 to Pin 14 may be
used to reduce the line voltage ( figure 2 ).
16
300 W and the maximum output current is 300 m A. The
VM-pin is virtual ground for the receiving amplifier.
6
IL = 50 mA
4
19 mA
24 mA
2
12
RC =
8
RC = 100 kW
4
0
0
93 7620 e
V (MIC) = 10 mVeff
4 8 12 16
Supply current ID ( mA )
Figure 3. Supply voltage, VD
20
0
0
93 7619 e
RDC = 10 kW
20 40 60
IL ( mA )
80
Figure 2. DC characteristics
100
2
1
VL = ( 0.0033 IDC + IOFFSET ) ( R30 || RC) + VRS +
IRDC RDC
with:
IOFFSET
VRS
R30
IDC
= 150 m A
= 150 mV
= 30 kW
= IL - ( 750 m A + 0.023
IL )
VD
An unregulated voltage, VD, is generated to supply the
internal and external circuits. The maximum voltage at
this pin is limited by an internal Z-diode to a value of
6.2 V. The available output current is shown in figure 3.
VM
The supply voltage for an electret microphone is derived
from VD (see figure 4). The output resistance is set to
0
3
93 7621 e
45
Supply voltage VD ( mA )
6
Figure 4. Electret microphone supply, VM
Swamp
Line current which is not used for internal and external
circuits is converted into heat via resistance Rswamp in
order to prevent the IC from thermal destruction at high
line currents.
The speech circuit will be high ohmic when the voltage
at SWAMP reaches 6 V. Typical characteristics for
various resistors are shown in figure 5.
Rev. A2, 27-Jan-98
3 (14)


3Pages


U4030B 電子部品, 半導体
U4030B
PD
VL
Pulse
“4”
“2”
Figure 8. Recommended timing diagram for power down diagram
Absolute Maximum Ratings
Parameters
Line current (according to figure 9)
DC line voltage
Storage temperature range
Junction temperature
Ambient temperature range
Power dissipation
SO20
Tamb = 60_ C
Thermal Resistance
Junction ambient
SO20
Parameters
Symbol
IL
VL
Tstg
Tj
Tamb
Ptot
Value
200
16
– 55 to +150
150
– 25 to + 65
640
Symbol
RthJA
Value
140
93 7625 e
Unit
mA
V
°C
°C
°C
mW
Unit
K/W
6 (14)
Rev. A2, 27-Jan-98

6 Page



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部品番号部品説明メーカ
U4030B

Telephone Speech Circuit

TEMIC Semiconductors
TEMIC Semiconductors


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