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Features
* * * * * * * * * * * * * * * *
DC Characteristic Adjustable Transmit and Receive Gain Adjustable Symmetrical Input of Microphone Amplifier Anti-clipping in Transmit Direction Automatic Line-loss Compensation Built-in Ear Protection DTMF and MUTE Input Adjustable Sidetone Suppression Independent of Sending and Receiving Amplification Integrated Amplifier for Loudhearing Operation Anti-clipping for Loudspeaker Amplifier Improved Acoustical Feedback Suppression Selectable Line Impedance Voice Switch Supply Voltages for All Functional Blocks of a Subscriber Set Operation Possible from 10-mA Line Current Filters Against EMI on Critical I/O
Monolithic Integrated Feature Phone Circuit U4089B-P
Benefits
* Complete System Integration of Analog Signal Processing on One Chip * Very Few External Components * Less Components for EMI protection
Applications
* * * *
Feature Phones Answering Machines Fax Machines Speaker Phones
Description
The telephone circuit U4089B-P is a linear integrated circuit for use in feature phones, answering machines and fax machines. It contains the speech circuit, sidetone equivalent and ear protection rectifiers. The circuit is line-powered and contains all components necessary for the amplification of signals and adaptation to the line. An integrated voice switch with loudspeaker amplifier enables 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.
Electrostatic sensitive device. Observe precautions for handling.
Rev. 4518A-CORD-05/02
1
Figure 1. Simple Block Diagram
Speech circuit
Audio amplifier
Voice switch
Dialer
Figure 2. Block Diagram
GT
44 4 3 MIC TXA 1
STO
32
VL
7
IMPSEL AGA IND 600
20 30 6
SENSE V B
9 10
V MP
13
MIC1 MIC2
900 Power supply
33
VM
DTMF
41 TX ACL
Impedance control
8
GND
TTXA
27
INLDR INLDT TLDR TLDT ATAFS
26 29 28 25
AGA control Acoustical feedback suppression control
Current supply
31
I REF
Transmit mute control
Supply
11
SAO
21
SACL
Rattenuation
TSACL
23
SAI
22
24
39
40
36
42
GSA
MUTX
RECO
GR
STI
RECIN
2
U4089B-P
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U4089B-P
Pin Configuration
Figure 3. Pinning SSO44
RECIN
ATAFS
INLDR
INLDT
RECO
TTXA
IREF
AGA
STO
MUTX 24 21 TSACL
TLDR
TLDT
STI
GR
VM
NC
NC
NC
NC
GT
30
29
27
26
37
35
34
33
32
38
36
28
44
43
42
41
40
39
25
31
NC 12
VMP 13
NC 14
NC 15
NC 16
NC 17
NC 18
NC 19
20
DTMF
SENSE
GND
Pin Description
Pin 1 3 4 6 7 8 9 10 11 13 Symbol DTMF MIC 2 MIC 1 IND VL GND SENSE VB SAO VMP Function Input for DTMF signals. Also used for the answering machine and hands-free input. Non-inverting input of microphone amplifier. Inverting input of microphone amplifier. The internal equivalent inductance of the circuit is proportional to the value of the capacitor at this pin. A resistor connected to ground may be used to reduce the DC line voltage. Line voltage. Reference point for DC and AC output signals. A small resistor (fixed) connected from this pin to VL sets the slope of the DC characteristic and also affects the line-length equalization characteristics as well as the line current at which the loudspeaker amplifier is switched on. Unregulated supply voltage for peripheral circuits (voice switch); limited to typically 7 V. Output of loudspeaker amplifier. Regulated supply voltage 3.3 V for peripheral circuits. The maximum output current is 2 mA. Control input for selection of line impedance 1) 600 2) 900 3) Mute of second transmit stage (TXA); also used for indication of external supply (answering machine); last chosen impedance is stored. Time constant of anti-clipping of speaker amplifier. Current input for setting the gain of the speaker amplifier. Adjustment characteristic is logarithmical. For RGSA > 2 M, the speaker amplifier is switched off. Speaker amplifier input (for loudspeaker, tone ringer and hands-free use).
20
IMPSEL
21 22 23 Note:
TSACL GSA SA I
Filters against electromagnetic interference (EMI) are located at the Pins MIC1, MIC2, RECIN and STI.
IMPSEL
MIC2
MIC1
GSA 22
SAO 11
NC
NC
IND
VB 10
1
2
3
4
5
6
7
8
VL
9
23
SAI
NC
3
4518A-CORD-05/02
Pin Description
Pin Symbol Function Three-state input of transmit mute: 1) Speech condition; inputs MIC1/MIC2 active. 2) DTMF condition; input DTMF active. A part of the input signal is passed to the receiving amplifier as a confidence signal during dialing. 3) Input DTMF used for answering machine and hands-free use; receive branch is not affected. Attenuation of acoustical feedback suppression. Maximum attenuation of AFS circuit is set by a resistor at this pin. Without the resistor, AFS is switched off. Input of transmit level detector. Input of receive level detector. Time constant of transmit level detector. Time constant of receive level detector. Automatic gain adjustment with line current. A resistor connected from this pin to GND sets the starting point. Maximum gain change is 6 dB. Internal reference current generation; RREF = 62 k; IREF = 20 A Side-tone reduction output. Output resistance is approximately 300 . Maximum load impedance is 10 k. Reference node for microphone-earphone and loudspeaker amplifier. Supply for electret microphone (IM 300 mA). Input for side-tone network. Output of receiving amplifier. A resistor connected from this pin to GND sets the receiving amplification of the circuit; amplifier RA1 can be muted by applying V MP to GR. Time constant of anti-clipping in transmit path. Input of receiving path; input impedance is typically 80 k. A resistor from this pin to GND sets the amplification of microphone and DTMF signals; the input amplifier can be muted by applying VMP to GT.
24
MUTX
25 26 27 28 29 30 31 32 33 36 39 40 41 42 44 Note:
ATAFS INLDT INLDR TLDT TLDR AGA IREF STO VM STI RECO GR TTXA RECIN GT
Filters against electromagnetic interference (EMI) are located at the Pins MIC1, MIC2, RECIN and STI.
4
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U4089B-P
DC Line Interface and Supply-voltage Generation
The DC line interface consists of an electronic inductance and an output stage which charges the capacitor at VB. The value of the equivalent inductance is given by: L = RSENSE x CIND x (RDC x R30) / (RDC + R30) In order to improve the supply during worst-case operating conditions, the PNP current source (IBOPT) supplies an extra amount of current to the supply voltages when the NPN in parallel is unable to conduct current. The U4089B-P contains a series regulator which provides a supply voltage VMP of 3.3 V at 2 mA suitable for a microprocessor. Figure 4. DC Line Interface with Electronic Inductance and Generation of Regulated and Unregulated Supply
VL 10 RSENSE SENSE I BOPT < 5 mA 10 F CIND + IND RDC R30 30 k 7V V OFFS + 3.3 V V MP 3.3 V/ 2 mA
47 F
VB 220 F
Figure 5. Functional Blocks for Power Supply
VB Power supply Voltage regulator 7V V MP
VL
LIDET
ES V LON
IMPED CONTR
IMPSEL
TXA TXACL
OFFSA COMP
SAL, SA SACL
AFS
MIC, DTMF AGA, RA TX MUTE MUT REC, STBAL RECATT
5
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1. In speech condition, the system is supplied by the line current. If the LIDET-block detects a line voltage above the fixed threshold (1.9 V), the internal signal VLON is activated, thus switching on all blocks of the chip. For line voltages below 1.9 V, the switches remain in their quiescent state as shown in Figure 5. OFFSACOMP disables the group listening feature (SAI, SA, SACL, AFS) below line currents of approximately 10 mA. 2. Selecting IMPSEL = high impedance activates all switches at the ES line.
Acoustic Feedback Suppression
Acoustical feedback from the loudspeaker to the handset microphone may cause instability in the system. The U4089B-P offers a very efficient feedback suppression circuit which uses a modified voice switch topology. Figure 6 shows the basic system configuration. Two attenuators (TX ATT and RX ATT) reduce the critical loop gain by introducing an externally adjustable amount of loss either in the transmit or in the receive path. The sliding control in block ATT CONTR determines whether the TX or the RX signal has to be attenuated. The overall loop gain remains constant under all operating conditions. Selection of the active channel is made by comparison of the logarithmically compressed TX and RX envelope curves. The system configuration for group listening, which is realized in the U4089B-P, is illustrated in Figure 7. TXA and SAI represent the two attenuators; the logarithmic envelope detectors are shown in a simplified way (operational amplifiers with two diodes). Figure 6. Basic Voice-switch System
TX attenuation Handset microphone
Logarithmic Hybrid Attenuation control Line
Logarithmic Loud speaker
RX attenuation
6
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U4089B-P
Figure 7. Integration of the Acoustic Feedback-suppression Circuit Into the Speech Circuit Environment
V B VL ZL
GT
INLDT
TLDT
STO
VL
VBG
+ Zint
SAO
AFS control Max att.
AGA
GSA SAI SAI TLDR
+
VBG
RECIN
INLDR
RECO
GR
STI STO STN
Figure 8. Acoustic Feedback Suppression by Alternative Control of Transmit- and Speaker Amplifier Gain
TLDT TXA SAI
RLDT
INLDT AGA IAGAFS INLDR AGA
RLDR IATGSA
IGSA
TLDR RATAFS
ATAFS
GSA
7
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A detailed diagram of the AFS (Acoustic Feedback Suppression) is given in Figure 8. Receive and transmit signals are first processed by logarithmic rectifiers in order to produce the speech envelopes at TLDT and RLDT. After amplification, a decision is made by the differential pair which direction should be transmitted. The attenuation of the controlled amplifiers TXA and SAI is determined by the emitter current IAT which is comprised of three parts: IATAFS IATGSA IAGAFS sets maximum attenuation decreases the attenuation when speaker amplifier gain is reduced decreases the attenuation according to the loop-gain reduction caused by the AGA function
IAT = IATAFS - IATGSA - IAGAFS G = IAT x 0.67 dB/A Figure 9 illustrates the principal relationship between speaker amplifier gain (GSA) and attenuation of AFS (ATAFS). Both parameters can be adjusted independently, but the internal coupling between them has to be considered. The maximum GSA value to be used is 36 dB. The shape of the characteristic is moved in the x-direction by adjusting resistor RATAFS, thus changing ATAFS m . The actual value of the attenuation (ATAFSa), however, can be determined by reading the value which belongs to the actual gain GSAa. If the speaker amplifier gain is reduced, the attenuation of AFS is automatically reduced by the same amount in order to achieve a constant loop gain. Zero attenuation is set for speaker gains GSA GSA0 = 36 dB - ATAFSm. Figure 9. Reducing Speaker Amplifier Gain Results in an Equal Reduction of AFS Attenuation
ATAFS (dB) ATAFS m ATAFS a RATAFS RATAFS not usable
GSA o
GSA a
36 dB
GSA (dB)
Operating Range of Speaker Amplifier
The basic behavior is illustrated in Figure 10. Actual values of ILON/ILOFF vary slightly with the adjustment of the DC characteristics and the selection of the internal line impedance.
8
U4089B-P
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U4089B-P
Figure 10. Threshold of Speaker Amplifier
SA on
SA off IL off IL on IL
Figure 11. Comparator Thresholds Depend on DC Mask and Line Impedance
7 RDC =
6 RDC = 130 k
VL ( V)
5
RDC = 68 k 4
3 10.0
12.0
14.0
16.0
18.0
20.0
I L ( mA )
= ILON at line impedance = 600 Ohm = ILOFF at line impedance = 600 Ohm = ILON at line impedance = 900 Ohm = ILOFF at line impedance = 900 Ohm
Absolute Maximum Ratings
Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C, SSO44 ESD (Human Body Model), ESD S 5.1 Standard ESD (Machine Model), JEDEC A115A Symbol IL VL Tj Tamb Tstg Ptot VESD VESD Value 140 12 125 - 25 to + 75 - 55 to + 150 0.9 1.5 150 Unit mA V C C C W kV V
Thermal Resistance
Parameters Junction ambient Symbol RthJA Value 70 Unit K/W
9
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Electrical Characteristics
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 k, Tamb = 25C, RGSA = 560 k, Zear = 68 nF + 100 , ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 22 (AC tests), unless otherwise specified. Parameters DC voltage drop over circuit Test Conditions IL IL IL IL = 2 mA = 14 mA = 60 mA = 100 mA Pin Symbol VL 4.6 8.8 Min. Typ. 2.4 5.0 7.5 9.4 Max. Unit V V V V DC Characteristics (see Figure 19) 5.4 10.0
Transmission Amplifier, IL = 14 mA, VMIC = 2 mV, RGT = 27 k, Unless Otherwise Specified Adjustment range of transmit gain Transmitting amplification Frequency response Gain change with current Gain deviation CMRR of microphone amplifier Input resistance of MIC amplifier Distortion at line Maximum output voltage RGT = 12 k RGT = 27 k IL > 14 mA VL = 700 mVrms IL > 19 mA, d < 5% Vmic = 25 mV CTXA = 1 F IL > 14 mA GT = 48 dB CTXA = 1 F each 3 dB overdrive IL = 10 mA IMP = 1 mA RDC = 68 k Vmic = 1 mV IM = 300 A IL = 10 mA IM = 300 A IMP = 1 mA RDC = 68 k Vmic = 10 mV IL = 100 mA, RAGA = 20 k IL 14 mA Mutx = open RGT = 12 k RGT = 27 k IL 14 mA, f = 300 to 3400 Hz Pin 30 open (AGA), IL = 14 to 100 mA Tamb = -10 to +60C GT GT GT GT GT CMRR Ri dt VLmax no 1.8 3 60 80 50 75 40 47 39.8 45 48 50 49 41.8 0.5 0.5 0.5 dB dB dB dB dB dB k %
45
110 2
4.2
dBm
Noise at line psophometrically weighted Anti-clipping attack time release time Gain at low operating current
-80
-72
dBmp
0.5 9
ms ms
GT
40
42.5
dB
Distortion at low operating current
dt
5
%
Line-loss compensation Mute suppression a) MIC muted (microphone preamplifier)
GTI
-6.4
-5.8
-5.2
dB
GTM
60
80
dB
10
U4089B-P
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U4089B-P
Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 k, Tamb = 25C, RGSA = 560 k, Zear = 68 nF + 100 , ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 22 (AC tests), unless otherwise specified. Parameters Adjustment range of receiving gain Receiving amplification Amplification of DTMF signal from DTMF IN to RECO Frequency response Gain change with current Gain deviation Ear protection MUTE suppression DTMF operation Output voltage d 2% Maximum output current d 2% Receiving noise psophometrically weighted Output resistance Line-loss compensation AC impedance Gain at low operating current IL = 10 mA IMP = 1 mA IM = 300 A VGEN = 560 mV RDC = 68 k IL = 10 mA IMP = 1 mA VGEN = 560 mV RDC = 68 k No AC signal 23 VSAI = 3 mV, IL = 15 mA, RGSA = 560 k RGSA = 20 k Test Conditions IL 14 mA, single-ended RGR = 62 k RGR = 22 k IL 14 mA VMUTX = VMP IL > 14 mA, f = 300 Hz to 3400 Hz IL = 14 to 100 mA Tamb = -10 to +60C IL 14 mA VGEN = 11 Vrms IL 14 mA VMUTX = VMP IL = 14 mA Zear = 68 nF Zear = 100 Zear = 68 nF + 100 IL 14 mA Output against GND RAGA = 20 k, IL = 100 mA ni Ro GRI Zimp -7.0 840 -6.0 900 Pin Symbol Min. Typ. Max. Unit Receiving Amplifier, IL = 14 mA, RGR = 62 k, Unless Otherwise Specified, VGEN = 300 mV GR GR GRM G RF G R G R EP G R 60 0.5 4 -80 -77 10 -5.0 960 -8 -7.75 -7 1.5 4 +2 -6.25 dB dB dB dB dB dB Vrms dB Vrms mA (peak) dBmp dB
1
7 0.5 0.5 0.5 1.1
GR
-8
-7
-6
dB
Distortion at low operating current
dR
5
%
Speaker Amplifier Minimum line current for operation Input resistance Gain from SAI to SAO ILmin 14 15 22 mA k
GSA
35.5
36.5 -3
37.5
dB dB
11
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Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 k, Tamb = 25C, RGSA = 560 k, Zear = 68 nF + 100 , ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 22 (AC tests), unless otherwise specified. Parameters Output power Test Conditions Load resistance RL = 50 , d < 5% VSAI = 20 mV IL = 15 mA IL = 20 mA IL > 15 mA nSA IL = 15 mA Tamb = -10 to +60C IL = 15 mA, VL = 0 dBm, VSAI = 4 mV Pin 23 open IL = 15 to 100 mA IL = 15 to 100 mA IL = 15 mA f = 300 to 3400 Hz 20 dB over drive G SA 200 Vpsoph dB Pin Symbol Min. Typ. Max. Unit
PSA PSA
3
7 20
mW mW
Output noise (input SAI open) psopho-metrically weighted Gain deviation Mute suppression
1
VSAO G SA RG SA G SA tr tf 5 80 0.8 1.3
-60
dBm
Gain change with current Resistor for turning off speaker amplifier Gain change with frequency Attack time of anti-clipping Release time of anti-clipping
1 2 0.5
dB M dB ms ms
TMF Amplifier Test Conditions: IMP = 2 mA, IM = 0.3 mA, VMUTX = VMP Adjustment range of DTMF gain DTMF amplification IL = 15 mA Mute active IL = 15 mA, VDTMF = 8 mV Mute active: MUTX = VMP IL = 15 mA Tamb = -10 to +60C RGT = 27 k, RGT = 15 k IL 15 mA VL = 0 dBm IL = 15 to 100 mA IL 15 mA IL 15 mA, IINLDT = 0 A RATAFS = 30 k IINLDR = 10 A IL 15 mA IINLDP = 0 RATAFS = 30 k IINLDR = 10 IL 15 mA GT GD 40 50 dB
GD
40.7
41.7
42.7
dB
Gain deviaton Input resistance Distortion of DTMF signal Gain deviation with current Range of attenuation Attenuation of transmit gain
GD Ri dD GD 0 60 26 180 70
0.5 300 130 2 0.5 50
dB k % dB dB
AFS Acousting Feedback Suppression
45
dB
Attenuation of speaker amplifier
G SA VATAFS 1.5
50
dB
AFS disable
V
12
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4518A-CORD-05/02
U4089B-P
Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 k, Tamb = 25C, RGSA = 560 k, Zear = 68 nF + 100 , ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 22 (AC tests), unless otherwise specified. Parameters VMP Test Conditions IL = 14 mA, RDC = 68 k IMP = 2 mA IL w 14 mA, IM = 300 A RDC = 130 k IB = + 20 mA, IL = 0 mA VMUTX = VMP VMUTX = GND Input high Input low Pin Symbol Min. Typ. Max. Unit Supply Voltages, Vmic = 25 mV, Tamb = -10 to +60C VMP 3.1 3.3 3.5 V
VM
VM VB
1.4
3.3
V
VB MUTX Input (see Figure 20) Input current Input voltage
7
7.6
V
IMUTX IMUTX VMUTX VMUTX VMP 0.3 V
+20 -20
+30 -30
A A V
0.3
V
13
4518A-CORD-05/02
U4089B-P Control
MUTX 0 MIC 1/2 transmit enabled receive enable AFS = on AGA = on TXACL = on DTMF transmit enabled receive enable AFS = on AGA = on TXACL = on DTMF transmit enabled DTMF to receive enable AFS = off AGA = off TXACL = off MODE Speech
Z
For answering machine
1
DTMF dialling
IMPSEL 0 Line impedance = 600 TXA = on ES = off Line impedance = 600 TXA = off ES = on Line impedance = 900 TXA = off ES = on Line impedance = 900 TXA = on ES = off
MODE Speech
0 to Z
Transmit mute
1 to Z
Transmit mute
1
Speech
Logic-level 0 = < (0.3 V) Z = > (1 V) < (VMP - 1 V) or (open input) 1 = > (VMP - 0.3 V)
AFS = Acoustical feedback-suppression control AGA = Automatic gain adjustment TXACL = Transmit anti-clipping control ES = External supply
14
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U4089B-P
Figure 12. Typical DC Characteristic
Figure 13. Typical Adjustment Range of the Transmit Gain
GT (dB)
RGT (kohm)
15
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Figure 14. Typical Adjustment Range of the Receive Gain
Figure 15. Typical AGA Characteristic
16
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U4089B-P
Figure 16. Typical Load Characteristic of VB for a Maximum (RDC = infinity) DC Characteristic and a 3-mW Loudspeaker Output
Figure 17. Typical Load Characteristic of VB for a Medium DC Characteristic (RDC = 130 k) and a 3-mW Loudspeaker Output
17
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Figure 18. Typical Load Characteristic of VB for a Minimum DC Characteristic (RDC = 68 k) and a 3-mW Loudspeaker Output
18
U4089B-P
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U4089B-P
Figure 19. DC Voltage Absolute
RGS 44 GT GT RECIN open S5 CMIC 3 MIC2 4 MIC1 68N IDIO 1 DTMF TTXA 41 GR 40 RECO 39 42 CRIN 47N CTXA 1U RGR RH 100 CH 68N
RDC S4 IL 10U CIND 6 IND 7 VL S1 VB DC 8 GND c 9 SENSE RSENSE 10 VB RSAO 11 SAO 100K STO 32 IREF 31 62K RAGA AGA 30 TLDR CMP 4.7U RVMP 1.65K 13 VMP 2.2N INLDR 27 2MEG 2MEG 29 CLDR 1N CLDT 1N on adapter cause of stability open RREF VM 33 10 b STI 36 3K VM RNW2
IB
CB
s2a
CM 100U IM
TLDT 28
2.2N INLDT 26
VIMPSEL
ATAFS
RATAFS 25 VMU TX
MUTX 24 + 20 IMPSEL SAI 23
+
DC
open RGSA
21 TSACL CSACL 1U
GSA 22
VL
DC
19
4518A-CORD-05/02
Figure 20. DC Voltage Current Test
RGS U7 VL 44 GT GT RECIN open 1 DTMF TTXA 41 3 MIC2 CMIC 68N GR 40 4 MIC1 RECO 39 RDC 10U CIND 6 IND 7 VL S1 VB DC + 8 GND 9 SENSE RSENSE 10 VB RSAO 11 SAO S12 100K STO 32 VM 33 10 b S6 RNW2 STI 36 3K 42 CRIN 47N CTXA 1U S10 DC + VTXA + ISTIHS VAGA DC ITXA on adapter cause of stability
4518A-CORD-05/02
RGR RH 100 VM CH 68N
IM
CB
CM 100U
a
s2
ISTO
RREF IREF 31 62K RAGA AGA 30 S5 TLDR CMP 4.7U RVMP 1.65K 13 VMP 2.2N INLDR 27 2MEG 2MEG 29 CLDR 1N CLDT 1N
TLDT 28
2.2N INLDT 26
ATAFS
RATAFS 25 VMU TX
MUTX 24 20 CSACL 1U IMPSEL SAI 23
+
open RGSA
21 TSACL
GSA 22
VSACL
DC
20
U4089B-P
ISACL
S4
+
IAGA
VSTO DC
+
ID C
VM
S8
IL
DC
U4089B-P
Figure 21. DC Ramps
RGS 44 GT GT RECIN open 1 DTMF TTXA 41 3 MIC2 4 MIC1 GR 40 RECO 39 42 CRIN 47N CTXA 1U RGR RH 100 CH 68N
VL
VL
RDC 10U CIND s4 6 IND RNW2 7 VL 8 GND b 9 SENSE RSENSE 10 VB VM 33 10 STI 36 3K
DC
+
IL
CMIC 68N
VM
DC
+ VB
s1
CM 100U
a
s2
IM
CB RSAO 100K a S4
11 SAO STO 32 IREF 31 62K RAGA AGA 30 TLDR 29 CLDR 1N CLDT 1N offen RREF
+ ILCUR
DC
4.7U
b
CMP 4.7U s5 13 VMP
TLDT 28
on adapter cause of stability
1.65K + VMP DC
2.2N INLDR 27
2MEG
2.2N INLDT 26
2MEG
VIMPSEL
ATAFS
25
RATAFS
VMU TX DC
+
MUTX 24 + 20 IMPSEL SAI 23
DC
offen RGSA
21 TSACL 1U CSACL
GSA 22
21
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Figure 22. AC Tests
RGS 44 GT GT RECIN open 1 DTMF TTXA 41 3 MIC2 4 MIC1 GR 40 RECO 39 42 CRIN 47N CTXA 1U RGR RH 100 CH 68N
VL
VL
RDC s4 10U CIND 6 IND 7 VL 8 GND b 9 RSENSE 10 SENSE VM 33 IM 62K RAGA AGA 30 TLDR 4.7U TLDT 28 s5 13 VMP 2.2N + VMP DC INLDR 27 2MEG 2MEG 29 CLDR 1N CLDT 1N on adapter cause of stability
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DC
+
CMIC 68N
IL
STI 36 3K
DC
VB
CB RSAO 100K a S4
10 VB
CM 100U
a
s2
11 SAO STO 32 IREF 31 open RREF
1.65K
+ ILCUR
DC
b
2.2N INLDT 26
VIMPSEL
ATAFS
RATAFS 25 VMU TX
+
DC
+
20
IMPSEL
SAI 23
open RGSA
21 TSACL CSACL 1U
GSA 22
22
U4089B-P
DC
MUTX 24
IDC
VM
RNW2
s1
+
U4089B-P
Table 1. Typical Values of External Components (see Figure 23)
Name C2 C3 C4 C5 C7 C8 C10 C11 C12 C14 C15 Value 4.7 nF 10 F 220 F 47 F 1 F 100 F 150 nF 68 nF 33 nF 100 nF 1 F Name C16 C17 C18 C21 C23 C24 C25 C26 C27 C28 R2 Value 47 F 10 F 10 F 1 F 6.8 nF 10 nF 100 nF 470 nF 33 nF 10 F 20 k Name R3 R4 R6 R8 R9 R10 R11 R12 R13 R14 R15 Value >68 k 10 k 62 k 22 k 330 k 3 k 62 k 30 k 62 k 120 k 47 k Name R16 R17 R18 R21 R22 R23 R24 R25 R26 R29 R30 Value 1 k 1.2 k 30 k 15 k 330 k 220 k 68 k 2 k 3.3 k 1 k 12 k
23
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Figure 23. Application for Hands-free Operation
24
VM hook switch C2 C3 C4 C5 VM R6 R3 R4 C8 C7 R2 13 V R 26 C 25 C 24 phone 4 29 Micro44 32 7 30 6 9 10 3 33 8 31 Ring R1 Tip 3 1 C 21 41 R 30 27 R 29 26 C 18 29 C 17 28 R 18 25 C 16 11
R 25
C 23
R 24
U4089B-P
U4089B-P
C 15 21 C 14 23 22 R 15 R 14 R 13 R 12 C 28 24 39 40 36 42 VB R 11 VL R 10 Earpiece R9 C 12 R8 C 11 BC177 VM VM to pin 32 LOGTX C 10 R 21 Micro controller V MP R 16
DTMF
HF-Mic
R 23
R 22
RECO
C 27
C 26
LOGTX
Loud speaker
VM
R 17
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U4089B-P
Ordering Information
Extended Type Number U4089B-PFN U4089B-PFNG3 Package SSO44 SSO44 Remarks Tubes Taped and reeled
Package Information
Package SSO44
Dimensions in mm
18.05 17.80 9.15 8.65 7.50 7.30
2.35 0.3 0.8 16.8 44 23 0.25 0.10
0.25 10.50 10.20
technical drawings according to DIN specifications
1
22
25
4518A-CORD-05/02
Atmel Headquarters
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(c) Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems.
Atmel(R) is the registered trademark of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper.
4518A-CORD-05/02 xM

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