U4030B TEMIC Semiconductors, U4030B Datasheet

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U4030B

Manufacturer Part Number
U4030B
Description
Telephone Speech Circuit
Manufacturer
TEMIC Semiconductors
Datasheet

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Rev. A2, 27-Jan-98
Telephone Speech Circuit
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
Features
D Microphone amplifier with
D Built in ear protection
D Power down input
D Mute input
D DTMF interface
D Low line impedance during pulse dialing
Block Diagram
Ordering Information
– Symmetrical input
– Privacy function
– Anticlipping
Extended Type Number
U4030B-AFLG3
U4030B-AFL
DTMF
PRIV
MIC1
MIC2
10
16
12
13
Limiter
www.DataSheet4U.com
CLIM
3
GT
11
+
Mute
MUTE
MICO
8
9
Package
SO20
SO20
PD
TXA
17
Figure 1.
ST
+
5
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.
Benefits
D Independent adjustment of
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
GND
14
Power supply
– Transmission gain
– Receiving gain
– Sidetone suppression
– Frequency response
U 4030 B
SWAMP
REC.ATT.
GR
Taped and reeled
6
18
+
Ear protection
V
1
M
V
RECO
D
20
7
15
19
Remarks
4
2
CK
VL
RDC
VC
U4030B
93 7618 e
1 (14)

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U4030B Summary of contents

Page 1

... Telephone Speech Circuit 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 Features D Microphone amplifier with – ...

Page 2

... U4030B Pin Description CLIM RECO 14 7 MUTE MICO DTMF Pin Symbol Function 1 V Supply voltage for an elecret M microphone, virtual ground 2 V The internal inductance of the C circuit is proportional to the value of the capacitor at this pin. ...

Page 3

... 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. U4030B A. The ...

Page 4

... R30 = 120 100 RC = infinite Transmit Microphone amplifier The microphone amplifier of U4030B has symmetrical inputs ( MIC1 and MIC2 ) with an input resistance typical). It has a gain which is adjustable W D with resistances RS1 and RS2 as follows MICO = 20 log [ (RS1 / RS2 ) + low pass function can be realised with CSLP ...

Page 5

... CVD will not be discharged, because an internal power down switches off all internal amplifiers. In order to avoid cracks recommended to activate power down while sending the dial pulses ( figure ZNW + – STX = 18.8 mS Figure 7. Schematic of the sidetone U4030B ( transconductance STX ), the – APP TX APP ...

Page 6

... U4030B Pulse 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 amb Thermal Resistance Parameters Junction ambient ...

Page 7

... Omax CMRR 60.0 60 – 3 – 0 600 Omax 0.7 – U4030B Typ. Max. Unit 6.5 6.8 V 7.2 V 10.5 11 60.0 80.0 k 44.7 45.2 dB +0.5 dB – 75.0 dBmp 33.5 dB 5.5 6.3 dBm 80 – 3.4 – 2.9 dB 0.5 dB – 78 dBmp 650 mVrms 1 ...

Page 8

... U4030B Parameters Test Conditions / Pins Mute input, (figure 12) MUTE input current MUTE V = 0.3 V MUTE MUTE-off input voltage MUTE-on input voltage Supply voltages (figure 10) Output voltage 4 MIC MIC Output voltage ...

Page 9

CVM m 10 CLIM 470 n RR2 CR RR1 680 m 2 RNW2 RNW3 CRNW3 CRNW2 18 k 2.7 k 100 n 100 RNW4 150 390 CRNW4 470 n 53n DTMF CK ...

Page 10

IVM CVM m 10 CLIM 470 680 m 2 CRNW 2 CRNW 3 RNW 3 RNW 2.7 k 100 n 100 n CRECO m 10 ...

Page 11

DTMF 470 n CVM CLIM CLIM 470 RR2 GR RR1 m 2.2 680 RECO 33 k MUTE MICO DTMF CRNW2 CRNW3 RNW2 RNW3 RS1 100 100 n 2.7 k ...

Page 12

... CRECO 10 m RNW4 390 ROUT IMUTE 150 CRNW4 100 n VMUTE ZEAR CVD 1000 U4030B VM VD RDC VC RDC RSWAMP 10 CLIM SWAMP IPD 68 VPRIV PRIV GR VL RECO GND 15 V MUTE MIC2 MICO MIC1 ...

Page 13

... R PD 150k Figure 13. PD input Package Information Package SO20 Dimensions in mm 12.95 12.70 0.4 1.27 11. Rev. A2, 27-Jan-98 D MUTE D 93 7630 e Figure 14. Mute input 2.35 0.25 0.10 11 technical drawings according to DIN specifications 10 U4030B 20k R 50k 9.15 8.65 7.5 7.3 0.25 10.50 10.20 13038 13 (14) ...

Page 14

... U4030B Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment ...

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