U4089B-PFN ATMEL [ATMEL Corporation], U4089B-PFN Datasheet

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U4089B-PFN

Manufacturer Part Number
U4089B-PFN
Description
Monolithic Integrated Feature Phone Circuit
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet

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U4089B-PFNG3Y
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Microchip Technology
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Features
Benefits
Applications
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 hands-
free operation. 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.
Electrostatic sensitive device.
Observe precautions for handling.
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
Complete System Integration of Analog Signal Processing on One Chip
Very Few External Components
Less Components for EMI protection
Feature Phones
Answering Machines
Fax Machines
Speaker Phones
Monolithic
Integrated
Feature Phone
Circuit
U4089B-P
Rev. 4518A–CORD–05/02
1

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U4089B-PFN Summary of contents

Page 1

... Speaker Phones Description The telephone circuit U4089B 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. ...

Page 2

... DTMF 41 TX TTXA ACL 27 INLDR 26 Acoustical INLDT 29 feedback TLDR suppression 28 control TLDT 25 ATAFS 11 SAO SACL 21 TSACL 23 SAI 22 GSA U4089B-P 2 Speech Audio circuit amplifier Voice switch V GT STO 600 900 TXA Impedance Transmit mute control MUTX RECO GR Dialer SENSE V ...

Page 3

... Speaker amplifier input (for loudspeaker, tone ringer and hands-free use). Note: Filters against electromagnetic interference (EMI) are located at the Pins MIC1, MIC2, RECIN and STI. 4518A–CORD–05/02 sets the slope of the DC characteristic and also L the speaker amplifier is switched off. U4089B-P 3 ...

Page 4

... Input of receiving path; input impedance is typically resistor from this pin to GND sets the amplification of microphone and DTMF signals; the input amplifier can be muted by applying V Note: Filters against electromagnetic interference (EMI) are located at the Pins MIC1, MIC2, RECIN and STI. U4089B ...

Page 5

... NPN BOPT in parallel is unable to conduct current. The U4089B-P contains a series regulator which provides a supply voltage suitable for a microprocessor. Figure 4. DC Line Interface with Electronic Inductance and Generation of Regulated and Unregulated Supply ...

Page 6

... Selection of the active channel is made by comparison of the logarithmically com- pressed TX and RX envelope curves. The system configuration for group listening, which is realized in the U4089B-P, is illus- trated 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). ...

Page 7

... Figure 7. Integration of the Acoustic Feedback-suppression Circuit Into the Speech Circuit Environment GT INLDT VBG SAO GSA SAI SAI TLDR Figure 8. Acoustic Feedback Suppression by Alternative Control of Transmit- and Speaker Amplifier Gain TLDT RLDT INLDT RLDR INLDR TLDR U4089B TLDT STO Zint AFS control Max AGA att. - VBG + INLDR ...

Page 8

... Operating Range of Speaker Amplifier U4089B 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 pro- duce the speech envelopes at TLDT and RLDT. After amplification, a decision is made by the differential pair which direction should be transmitted. ...

Page 9

... ILOFF at line impedance = 600 Ohm = ILON at line impedance = 900 Ohm = ILOFF at line impedance = 900 Ohm Symbol amb T stg P tot V ESD V ESD Symbol R thJA U4089B off on IL RDC = RDC = 130 k RDC = 68 k 14.0 16.0 18.0 20 Value 140 12 125 - 150 0.9 1 ...

Page 10

... Line-loss compensation I = 100 mA, L RAGA = 20 k Mute suppression MIC muted Mutx = open (microphone preamplifier) U4089B mA, RDC = 130 amb = GND, see Figure 22 (AC tests), unless otherwise specified. MUTX Pin = 2 mV, RGT = 27 k, Unless Otherwise Specified MIC 14 mA, = -10 to +60 C rms ...

Page 11

... -7.0 -6 840 900 imp Lmin 35.5 36.5 -3 U4089B-P Max. Unit +2 dB -6. ± 0.5 dB ± 0.5 dB ± 0.5 dB 1.1 Vrms dB V rms mA (peak) -77 dBmp 10 -5.0 dB 960 - 37 ...

Page 12

... INLDT R ATAFS I INLDR Attenuation of speaker I L amplifier I INLDP R ATAFS I INLDR AFS disable I L U4089B mA, RDC = 130 amb = GND, see Figure 22 (AC tests), unless otherwise specified. MUTX Pin = - VMP MUTX = - µ µ ...

Page 13

... C, RGSA = 560 k, MP amb = GND, see Figure 22 (AC tests), unless otherwise specified. MUTX Pin = - GND Symbol Min. Typ. V 3 +20 MUTX I -20 MUTX MUTX 0 MUTX U4089B-P Max. Unit 3.5 V 3.3 V 7.6 V +30 µA -30 µ ...

Page 14

... U4089B-P Control U4089B-P 14 MUTX 0 MIC 1/2 transmit enabled receive enable AFS = on AGA = on TXACL = on Z DTMF transmit enabled receive enable AFS = on AGA = on TXACL = on 1 DTMF transmit enabled DTMF to receive enable AFS = off AGA = off TXACL = off IMPSEL 0 Line impedance = 600 TXA = off ...

Page 15

... Figure 12. Typical DC Characteristic Figure 13. Typical Adjustment Range of the Transmit Gain G (dB) T U4089B-P RGT (kohm) 15 ...

Page 16

... U4089B-P 16 Figure 14. Typical Adjustment Range of the Receive Gain Figure 15. Typical AGA Characteristic 4518A–CORD–05/02 ...

Page 17

... Figure 16. Typical Load Characteristic Characteristic and a 3-mW Loudspeaker Output Figure 17. Typical Load Characteristic of V (RDC = 130 k ) and a 3-mW Loudspeaker Output U4089B-P for a Maximum (RDC = infinity) B for a Medium DC Characteristic B 17 ...

Page 18

... U4089B-P 18 Figure 18. Typical Load Characteristic of V (RDC = and a 3-mW Loudspeaker Output for a Minimum DC Characteristic B 4518A–CORD–05/02 ...

Page 19

... DTMF S5 MIC2 3 MIC1 4 6 IND GND 10 SENSE 9 RSENSE 10 VB RSAO SAO 11 100K CMP 4.7U 13 VMP 20 IMPSEL + 21 TSACL U4089B-P CRIN 47N RECIN 42 CTXA 1U 41 TTXA RGR 68N RECO 39 100 RNW2 36 STI 3K CM 100U open STO 32 RREF 31 IREF 62K ...

Page 20

... Figure 20. DC Voltage Current Test RGS RDC + CB RVMP 1.65K + U4089B open 1 DTMF MIC2 3 MIC1 4 6 IND GND 10 SENSE 9 RSENSE 10 VB RSAO SAO 11 100K CMP 4.7U 13 VMP 20 IMPSEL TSACL 21 CRIN 47N RECIN 42 CTXA 1U 41 TTXA RGR 68N ...

Page 21

... RGS open 1 DTMF MIC2 3 MIC1 4 6 IND GND 10 SENSE 9 RSENSE SAO CMP 4.7U 13 VMP 20 IMPSEL + TSACL 21 U4089B-P CRIN 47N RECIN 42 CTXA 1U 41 TTXA RGR 68N RECO 39 100 RNW2 36 STI 3K CM 100U 33 VM STO offen 32 RREF 31 IREF 62K ...

Page 22

... Figure 22. AC Tests RDC DC CB RSAO 100K 4.7U 1.65K U4089B-P 22 RGS open 1 DTMF MIC2 3 MIC1 4 6 IND GND 10 SENSE 9 RSENSE 10 VB SAO 11 13 VMP 20 IMPSEL + TSACL 21 CRIN 47N RECIN 42 CTXA 1U 41 TTXA RGR 68N RECO 39 100 RNW2 36 STI ...

Page 23

... 100 470 µ U4089B-P Value Name Value > 1 330 k R 330 220 ...

Page 24

... Figure 23. Application for Hands-free Operation U4089B-P 24 4518A–CORD–05/02 ...

Page 25

... Ordering Information Extended Type Number U4089B-PFN U4089B-PFNG3 Package Information Package SSO44 Dimensions in mm 0.3 0 4518A–CORD–05/02 Package Remarks SSO44 Tubes SSO44 Taped and reeled 18.05 17.80 0.25 0.10 16 U4089B-P 9.15 8.65 7.50 7.30 2.35 10.50 10.20 technical drawings according to DIN specifications 0.25 25 ...

Page 26

Atmel Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Room 1219 Chinachem Golden Plaza 77 Mody ...

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