u4089b-m ATMEL Corporation, u4089b-m Datasheet

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u4089b-m

Manufacturer Part Number
u4089b-m
Description
Multi-standard Feature Phone Circuit With Voice Switch
Manufacturer
ATMEL Corporation
Datasheet

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Monolithic Integrated Feature Phone Circuit
Description
The telephone circuit U4089B-M 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.
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 Built-in ear protection
D DTMF and MUTE input
D Adjustable sidetone suppression independent
D Integrated amplifier for loudhearing operation
D Anti-clipping for loudspeaker amplifier
D Improved acoustical feedback suppression
Ordering Information
Rev. A3, 06-Mar-01
of sending and receiving amplification
U4089B-MFNG3
U4089B-MSD
U4089B-MFN
Type
Speech
switch
circuit
Voice
Package
SDIP30
SSO44
SSO44
amplifier
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.
D Selectable line impedance
D Voice switch
D Supply voltages for all functional blocks of a
D Operation possible from 10-mA line current
Benefits
D Complete system integration of analog signal
D Very few external components
Applications
Feature phone, answering machine, fax machine,
speaker phone
Audio
subscriber set
processing on one chip
Dialer
U4089B-M
Taped and reeled
Remarks
Tubes
Tubes
12683
1 (23)

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u4089b-m Summary of contents

Page 1

... Monolithic Integrated Feature Phone Circuit 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

... U4089B-M Block Diagram GT 12685 1(44) 4(4) MIC1 MIC 3(3) MIC2 2(1) DTMF 29(41) TX TTXA ACL 19(27) INLDR 18(26) INLDT Acoustical 21(29) feedback TLDR Transmit suppression 20(28) mute TLDT control 17(25) control ATAFS 10(11) SAO SACL 13(21) TSACL 15(23) SAI 14(22) GSA MUTX Table 1. Typical values of external components (figure next page) Name Value Name C 4 ...

Page 3

... Rev. A3, 06-Mar-01 Figure 2. Application for hands-free operation U4089B-M 3 (23) ...

Page 4

... U4089B-M Pin Description DTMF 3 MIC2 4 MIC1 5 IND GND SENSE SAO IMPSEL 12 TSACL 13 GSA 14 15 SAI 12687 Figure 3. Pinning SDIP30 4 (23 DTMF RECIN TTXA MIC2 MIC1 27 RECO STI IND ...

Page 5

... RECO 28 (40 (41) TTXA 30 (42) RECIN U4089B-M Function Speaker amplifier input (for loud- speaker, tone ringer and hands-free use) 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 ...

Page 6

... Figure 6. The supply of functional blocks is controlled by input voltages V 6 (23) supplies an extra amount of current to the supply voltages . when the NPN in parallel is unable to conduct current The U4089B-M contains a series regulator which provides a supply voltage V * for a microprocessor. BOPT I BOPT < – ...

Page 7

... Selection of the active channel is made by comparison of the logarithmically compressed TX- and RX- envelope curve. The system configuration for group listening, which is realized in the U4089B-M, is illustrated in figure 8. TXA and SAI represent the two attenuators; the logarithmic en- velope detectors are shown in a simplified way (operational amplifiers with two diodes). ...

Page 8

... U4089B-M GT SAO GSA SAI SAI TLDR Figure 8. Integration of the acoustic feedback-suppression circuit into the speech circuit environment RLDT INLDT RLDR INLDR Figure 9. Acoustic feedback suppression by alternative control of transmit- and speaker amplifier gain 8 (23) INLDT TLDT STO – VBG + AFS control Max AGA att ...

Page 9

... SA off Figure 11. Threshold of speaker amplifier 8957 9131 not usable = ILON = ILOFF = ILON = ILOFF 36 dB GSA (dB) Figure 12. Comparator thresholds depend on DC mask and line U4089B-M 13284 IL IL off =130kW DC R =68kW ...

Page 10

... U4089B-M Absolute Maximum Ratings Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation amb Thermal Resistance Parameters Junction ambient SDIP30 SSO44 Electrical Characteristics kHz, 0 dBm = 775 rms 100 nF, Pin 20 open, V ...

Page 11

... 300 560 mV GEN RDC = imp 560 mV GEN RDC = 68 kW U4089B-M Min. Typ. Max. Unit 40 42 –6.4 –5.8 –5 300 mV GEN – – 7 – 6. " ...

Page 12

... U4089B-M Electrical Characteristics (continued) Parameters Speaker amplifier Minimum line current for operation Input resistance Gain from SAI to SAO Output power Output noise (input SAI open) psophometrically weighted Gain deviation Mute suppression Gain change with current Resistor for turning off speaker amplifier ...

Page 13

... Attenuation of speaker amplifier AFS disable Supply voltages mV, T mic MUTX input Input current Input voltage U4089B-M Control 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 ...

Page 14

... U4089B-M G (dB) T Figure 14. Typical adjustment range of the transmit gain 14 (23) Figure 13. Typical DC characteristic RGT (kohm) 94 8856 94 8860 Rev. A3, 06-Mar-01 ...

Page 15

... Figure 15. Typical adjustment range of the receive gain 948855 Rev. A3, 06-Mar-01 Figure 16. Typical AGA characteristic U4089B-M 94 9680 15 (23) ...

Page 16

... U4089B-M Figure 17. Typical load characteristic of V Figure 18. Typical load characteristic (23) for a maximum (RDC = infinity characteristic and a 3-mW loudspeaker output for a medium DC characteristic B (RDC = 130 kW) and a 3-mW loudspeaker output 94 8858 94 8874 Rev. A3, 06-Mar-01 ...

Page 17

... Figure 19. Typical load characteristic of V Rev. A3, 06-Mar-01 for a minimum DC characteristic B (RDC = 68 kW) and a 3-mW loudspeaker output U4089B-M 94 8861 17 (23) ...

Page 18

... U4089B-M 18 (23) Figure 20. DC voltage absolut Rev. A3, 06-Mar-01 ...

Page 19

... Rev. A3, 06-Mar-01 Figure 21. DC voltage current test U4089B-M 19 (23) ...

Page 20

... U4089B-M 20 (23) Figure 22. DC ramps Rev. A3, 06-Mar-01 ...

Page 21

... Rev. A3, 06-Mar-01 Figure 23. AC tests U4089B-M 21 (23) ...

Page 22

... U4089B-M Package Information Package SDIP30 Dimensions in mm 1.778 30 1 Package SSO44 Dimensions in mm 18.05 17.80 0.3 0.8 16 (23) 27.5 27.1 27.3 27.1 0.9 4.8 4.2 3.3 0.53 1.1 0.43 0.9 24.892 16 technical drawings according to DIN specifications 15 2.35 0.25 0. 10.26 10.06 8.7 8.5 0.35 0.25 12.2 11.0 13046 9.15 8.65 7.50 7.30 0.25 10.50 10.20 technical drawings according to DIN specifications 13040 Rev. A3, 06-Mar-01 ...

Page 23

... Data sheets can also be retrieved from the Internet: Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A3, 06-Mar-01 U4089B-M http://www.atmel–wm.com 23 (23) ...

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