Features • • • • • • • • • • • • • • • • Adjustable DC Characteristic 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 Open-listening 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 Benefits Monolithic Integrated Feature Phone Circuit U4089B-P • 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 1. 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 open-listening or hands-free operation. With an anti-feedback function, acoustical feedback during open listening 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. 4518C–CORD–10/05 Figure 1-1. Simple Block Diagram Speech circuit Audio amplifier Voice switch Figure 1-2. Block Diagram GT STO 44 MIC1 MIC2 Dialer 32 VL 7 IMPSEL AGA IND 600Ω 3 MIC 41 TTXA TLDT 9 10 13 900Ω 26 29 28 Power supply Impedance control 33 8 VM GND TX ACL 27 TLDR 6 TXA 1 INLDT 30 4 DTMF INLDR 20 V MP SENSE V B Current supply AGA control Acoustical feedback suppression control 25 Transmit mute control 31 I REF Supply ATAFS 11 SAO 21 Rattenuation SACL TSACL 23 SAI 22 GSA 2 24 39 MUTX RECO 40 GR 36 STI 42 RECIN U4089B-P 4518C–CORD–10/05 U4089B-P 2. Pin Configuration AGA TLDR TLDT INLDR INLDT 33 32 31 30 29 28 27 26 25 24 23 NC 12 VMP 13 NC 14 NC 15 NC 16 NC 17 NC 18 NC 19 IMPSEL 20 TSACL 21 GSA 22 SAI IREF 34 SAO 11 MUTX STO 35 VB 10 VM 36 9 SENSE NC 37 8 GND NC NC 38 7 VL STI NC 39 6 IND RECO 40 5 NC TTXA GR 41 4 MIC1 RECIN 42 3 MIC2 43 2 NC Table 2-1. ATAFS Pinning SSO44 NC 44 1 DTMF GT Figure 2-1. Pin Description Pin Symbol 1 DTMF Input for DTMF signals. Also used for the answering machine and hands-free input. 3 MIC 2 Non-inverting input of microphone amplifier. 4 MIC 1 Inverting input of microphone amplifier. 6 IND 7 VL 8 GND 9 SENSE Function 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 affects the line-length equalization characteristics, and the line current at which the loudspeaker amplifier is switched on. Unregulated supply voltage for peripheral circuits (voice switch); limited to typically 7V. 10 VB 11 SAO Output of loudspeaker amplifier. 13 VMP Regulated supply voltage 3.3V for peripheral circuits. The maximum output current is 2 mA. 20 IMPSEL Control input for selection of line impedance 1) 600Ω 2) 900Ω 3) Mute of second transmit stage (TXA); also used for indication of external supply (answering machine); last chosen impedance is stored. 21 TSACL Time constant of anti-clipping of speaker amplifier. 22 GSA Current input for setting the gain of the speaker amplifier. Adjustment characteristic is logarithmical. For RGSA > 2 MΩ, the speaker amplifier is switched off. 23 SAI Speaker amplifier input (for loudspeaker, tone ringer and hands-free use). Note: Filters against electromagnetic interference (EMI) are located at pins MIC1, MIC2, RECIN and STI. 3 4518C–CORD–10/05 Table 2-1. Pin Symbol Function 24 MUTX 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. 25 ATAFS 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. 26 INLDT Input of transmit level detector. 27 INLDR Input of receive level detector. 28 TLDT Time constant of transmit level detector. 29 TLDR Time constant of receive level detector. 30 AGA Automatic gain adjustment with line current. A resistor connected from this pin to GND sets the starting point. Maximum gain change is 6 dB. 31 IREF Internal reference current generation; RREF = 62 kΩ; IREF = 20 µA 32 STO Side-tone reduction output. Output resistance is approximately 300Ω. Maximum load impedance is 10 kΩ. 33 VM Reference node for microphone-earphone and loudspeaker amplifier. Supply for electret microphone (IM ≥ 300 mA). 36 STI Input for side-tone network. 39 RECO Output of receiving amplifier. 40 GR 41 TTXA Time constant of anti-clipping in transmit path. 42 RECIN Input of receiving path; input impedance is typically 80 kΩ. 44 GT Note: 4 Pin Description (Continued) A resistor connected from this pin to GND sets the receiving amplification of the circuit; amplifier RA1 can be muted by applying VMP to GR. 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. Filters against electromagnetic interference (EMI) are located at pins MIC1, MIC2, RECIN and STI. U4089B-P 4518C–CORD–10/05 U4089B-P 3. 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 × CIND × (RDC × 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 3.3V at 2 mA suitable for a microprocessor. Figure 3-1. VL DC Line Interface With Electronic Inductance and Generation of Regulated and Unregulated Supply 10 SENSE RSENSE I BOPT < 5 mA V MP CIND 10 µF IND + + - - R30 30 kΩ RDC 3.3V/ 2 mA 3.3V VB 7V 220 µF V OFFS Figure 3-2. 47 µF Functional Blocks for Power Supply VB VL 7V Voltage regulator Power supply V MP ES LIDET V LON TXA TXACL OFFSA COMP SAL, SA SACL AFS IMPED CONTR IMPSEL MIC, DTMF AGA, RA TX MUTE MUT REC, STBAL RECATT 5 4518C–CORD–10/05 1. In speech condition, the system is supplied by the line current. If the LIDET block detects a line voltage above the fixed threshold (1.9V), the internal signal VLON is activated, thus switching on all blocks of the chip. For line voltages below 1.9V, the switches remain in their quiescent state as shown in Figure 3-2. 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 on the ES line. 4. 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 4-1 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 4-2. TXA and SAI represent the two attenuators; the logarithmic envelope detectors are shown in a simplified way (operational amplifiers with two diodes). Figure 4-1. Basic Voice-switch System TX attenuation Handset microphone Logarithmic Hybrid Attenuation control Line Logarithmic Loud speaker 6 RX attenuation U4089B-P 4518C–CORD–10/05 U4089B-P Figure 4-2. Integration of the Acoustic Feedback-suppression Circuit Into the Speech Circuit Environment V B GT INLDT TLDT VBG STO V L VL Z L + Zint SAO AFS control Max att. - GSA + AGA VBG RECIN SAI SAI TLDR RECO INLDR GR STI STO STN Figure 4-3. Acoustic Feedback Suppression by Alternative Control of Transmit and Speaker Amplifier Gain TLDT TXA RLDT SAI INLDT AGA AGA IAGAFS RLDR INLDR IATGSA TLDR ATAFS IGSA GSA RATAFS 7 4518C–CORD–10/05 Figure 4-3 on page 7 provides a detailed diagram of the AFS (Acoustic Feedback Suppression). 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 × 0.67 dB/µA Figure 4-4 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 ATAFSm. 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 4-4. Reducing Speaker Amplifier Gain Results in an Equal Reduction of AFS Attenuation ATAFS (dB) ATAFS m ATAFS a GSA o 8 RATAFS RATAFS GSA a 36 dB not usable GSA (dB) U4089B-P 4518C–CORD–10/05 U4089B-P 5. Operating Range of Speaker Amplifier The basic behavior is illustrated in Figure 5-1. Actual values of ILON/ILOFF vary slightly with the adjustment of the DC characteristics and the selection of the internal line impedance. Figure 5-1. Threshold of Speaker Amplifier SA on SA off IL off Figure 5-2. IL on IL Comparator Thresholds Depend on DC Mask and Line Impedance 7 RDC = ∞ 6 VL ( V ) RDC = 130 k 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 9 4518C–CORD–10/05 6. Absolute Maximum Ratings Parameters Symbol Value Unit Line current IL 140 mA DC line voltage VL 12 V Junction temperature Tj 125 °C Ambient temperature Tamb –25 to +75 °C Storage temperature Tstg –55 to +150 °C Total power dissipation, Tamb = 60° C, SSO44 Ptot 0.9 W ESD (Human Body Model), ESD S 5.1 Standard VESD 1.5 kV ESD (Machine Model), JEDEC A115A VESD 150 V Symbol Value Unit RthJA 70 K/W 7. Thermal Resistance Parameters Junction ambient 8. Electrical Characteristics f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25° C, RGSA = 560 kΩ, Zear = 68 nF + 100Ω, ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 8-11 on page 22 (AC tests), unless otherwise specified. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit DC Characteristics (see Figure 8-8 on page 19) DC voltage drop over circuit IL = 2 mA IL = 14 mA IL = 60 mA IL = 100 mA VL 4.6 8.8 2.4 5.0 7.5 9.4 10.0 V V V V 5.4 Transmission Amplifier, IL = 14 mA, VMIC = 2 mV, RGT = 27 kΩ, unless otherwise specified Adjustment range of transmit gain GT 40 45 50 dB GT 47 39.8 48 49 41.8 dB Transmitting amplification RGT = 12 kΩ RGT = 27 kΩ Frequency response IL ≥ 14 mA, f = 300Hz to 3400Hz ∆GT ±0.5 dB Gain change with current Pin 30 open (AGA), IL = 14 mA to 100 mA ∆GT ±0.5 dB Gain deviation Tamb = –10° C to +60° C ∆GT ±0.5 dB CMRR of microphone amplifier CMRR 60 80 45 50 75 Input resistance of MIC amplifier RGT = 12 kΩ RGT = 27 kΩ Ri Distortion at line IL > 14 mA VL = 700 mVrms dt Maximum output voltage IL > 19 mA, d < 5% Vmic = 25 mV CTXA = 1 µF 10 VLmax 1.8 3 dB 110 kΩ 2 % 4.2 dBm U4089B-P 4518C–CORD–10/05 U4089B-P 8. Electrical Characteristics (Continued) f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25° C, RGSA = 560 kΩ, Zear = 68 nF + 100Ω, ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 8-11 on page 22 (AC tests), unless otherwise specified. Parameters Test Conditions Noise at line psophometrically weighted IL > 14 mA GT = 48 dB Anti-clipping attack time release time CTXA = 1 µF each 3 dB overdrive Pin Symbol Min. no Typ. Max. Unit –80 –72 dBmp 0.5 9 Gain at low operating current IL = 10 mA IMP = 1 mA RDC = 68 kΩ Vmic = 1 mV IM = 300 µA GT Distortion at low operating current IL = 10 mA IM = 300 µA IMP = 1 mA RDC = 68 kΩ Vmic = 10 mV dt Line-loss compensation IL = 100 mA, RAGA = 20 kΩ ∆GTI –6.4 –5.8 Mute suppression a) MIC muted (microphone preamplifier) IL ≥ 14 mA Mutx = open GTM 60 80 40 ms ms 42.5 dB 5 % –5.2 dB dB Receiving Amplifier, IL = 14 mA, RGR = 62 kΩ, unless otherwise specified, VGEN = 300 mV Adjustment range of receiving gain IL ≥ 14 mA, single ended GR Receiving amplification RGR = 62 kΩ RGR = 22 kΩ GR Amplification of DTMF signal from DTMF IN to RECO IL ≥ 14 mA VMUTX = VMP GRM Frequency response IL > 14 mA, f = 300Hz to 3400Hz Gain change with current –8 +2 dB –7.75 –7 1.5 –6.25 1 4 7 dB ∆GRF ±0.5 dB IL = 14 mA to 100 mA ∆GR ±0.5 dB Gain deviation Tamb = –10° C to +60° C ∆GR ±0.5 dB Ear protection IL ≥ 14 mA VGEN = 11Vrms EP 1.1 Vrms MUTE suppression DTMF operation IL ≥ 14 mA VMUTX = VMP ∆GR Output voltage d ≤2% dB 60 dB IL = 14 mA Zear = 68 nF 0.5 Vrms Maximum output current d ≤2% Zear = 100Ω 4 mA (peak) Receiving noise psophometrically weighted Zear = 68 nF + 100Ω IL ≥ 14 mA ni Output resistance Output against GND Ro Line-loss compensation RAGA = 20 kΩ, IL = 100 mA AC impedance –80 –77 dBmp 10 Ω ∆GRI –7.0 –6.0 –5.0 dB Zimp 840 900 960 Ω 11 4518C–CORD–10/05 8. Electrical Characteristics (Continued) f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25° C, RGSA = 560 kΩ, Zear = 68 nF + 100Ω, ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 8-11 on page 22 (AC tests), unless otherwise specified. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Gain at low operating current IL = 10 mA IMP = 1 mA IM = 300 µA VGEN = 560 mV RDC = 68 kΩ GR –8 –7 –6 dB Distortion at low operating current IL = 10 mA IMP = 1 mA VGEN = 560 mV RDC = 68 kΩ dR 5 % ILmin 15 mA 22 kΩ 37.5 dB dB Speaker Amplifier Minimum line current for operation No AC signal Input resistance 23 14 Gain from SAI to SAO VSAI = 3 mV, IL = 15 mA, RGSA = 560 kΩ RGSA = 20 kΩ Output power Load resistance RL = 50 Ω, d < 5% VSAI = 20 mV IL = 15 mA IL = 20 mA PSA PSA Output noise (input SAI open) psophometrically weighted IL > 15 mA nSA 200 µVpsoph Gain deviation IL = 15 mA Tamb = –10° C to +60° C ∆GSA ±1 dB Mute suppression IL = 15 mA, VL = 0 dBm, VSAI = 4 mV Pin 23 open VSAO –60 dBm Gain change with current IL = 15 mA to 100 mA ∆GSA ±1 dB Resistor for turning off speaker amplifier IL = 15 mA to 100 mA RGSA 2 MΩ Gain change with frequency IL = 15 mA f = 300Hz to 3400Hz ∆GSA ±0.5 dB Attack time of anti-clipping 20 dB overdrive Release time of anti-clipping GSA 35.5 36.5 –3 3 7 20 0.8 1.3 mW mW tr 5 ms tf 80 ms TMF Amplifier Test Conditions: IMP = 2 mA, IM = 0.3 mA, VMUTX = VMP Adjustment range of DTMF gain IL = 15 mA Mute active GD 40 DTMF amplification IL = 15 mA, VDTMF = 8 mV Mute active: MUTX = VMP GD 40.7 Gain deviaton IL = 15 mA Tamb = –10° C to +60° C GD 12 41.7 50 dB 42.7 dB ±0.5 dB U4089B-P 4518C–CORD–10/05 U4089B-P 8. Electrical Characteristics (Continued) f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kΩ, Tamb = 25° C, RGSA = 560 kΩ, Zear = 68 nF + 100Ω, ZM = 68 nF, Pin 30 open (AGA), VMUTX = GND, see Figure 8-11 on page 22 (AC tests), unless otherwise specified. Parameters Test Conditions Input resistance Pin Symbol Min. Typ. Max. Unit RGT = 27 kΩ, RGT = 15 kΩ Ri 60 26 180 70 300 130 kΩ Distortion of DTMF signal IL ≥ 15 mA VL = 0 dBm dD 2 % Gain deviation with current IL = 15 mA to 100 mA ∆GD ±0.5 dB 50 dB AFS Acousting Feedback Suppression Range of attenuation IL ≥ 15 mA Attenuation of transmit gain IL ≥ 15 mA, IINLDT = 0 µA RATAFS = 30 kΩ IINLDR = 10 µA ∆GT 45 dB Attenuation of speaker amplifier IL ≥ 15 mA IINLDP = 0 µΑ RATAFS = 30 kΩ IINLDR = 10 µΑ ∆GSA 50 dB AFS disable IL ≥ 15 mA VATAFS 1.5 0 V Supply Voltages, Vmic = 25 mV, Tamb = –10° C to +60° C VMP IL = 14 mA, RDC = 68 kΩ IMP = 2 mA VMP 3.1 VM IL ≥ 14 mA, IM = 300 µA RDC = 130 kΩ VM 1.4 VB IB = +20 mA, IL = 0 mA VB VMUTX = VMP VMUTX = GND IMUTX IMUTX Input high VMUTX Input low VMUTX 3.3 3.5 V 3.3 V 7 7.6 V +20 –20 +30 –30 µA µA MUTX Input (see Figure 8-9 on page 20) Input current Input voltage VMP – 0.3V V 0.3 V 13 4518C–CORD–10/05 Table 8-1. U4089B-P Control MUTX MODE 0 MIC1, MIC2 transmit enabled receive enable AFS = on AGA = on TXACL = on Speech Z DTMF transmit enabled receive enable AFS = on AGA = on TXACL = on For answering machine 1 DTMF transmit enabled DTMF to receive enable AFS = off AGA = off TXACL = off DTMF dialling IMPSEL MODE 0 Line impedance = 600Ω TXA = on ES = off Speech 0 to Z Line impedance = 600Ω TXA = off ES = on Transmit mute 1 to Z Line impedance = 900Ω TXA = off ES = on Transmit mute 1 Line impedance = 900Ω TXA = on ES = off Speech Logic level 0 = < (0.3V) Z = > (1V) < (VMP – 1V) or (open input) 1 = > (VMP – 0.3V) AFS = Acoustical feedback-suppression control AGA = Automatic gain adjustment TXACL = Transmit anti-clipping control ES = External supply 14 U4089B-P 4518C–CORD–10/05 U4089B-P Figure 8-1. Typical DC Characteristic Figure 8-2. Typical Adjustment Range of the Transmit Gain GT (dB) RGT (kohm) 15 4518C–CORD–10/05 16 Figure 8-3. Typical Adjustment Range of the Receive Gain Figure 8-4. Typical AGA Characteristic U4089B-P 4518C–CORD–10/05 U4089B-P Figure 8-5. Typical Load Characteristic of VB for a Maximum (RDC = infinity) DC Characteristic and a 3-mW Loudspeaker Output Figure 8-6. Typical Load Characteristic of VB for a Medium DC Characteristic (RDC = 130 kΩ) and a 3-mW Loudspeaker Output 17 4518C–CORD–10/05 Figure 8-7. 18 Typical Load Characteristic of VB for a Minimum DC Characteristic (RDC = 68 kΩ) and a 3-mW Loudspeaker Output U4089B-P 4518C–CORD–10/05 U4089B-P DC Voltage Absolute RGS 44 GT GT RECIN open IDIO 68N CMIC S5 1 DTMF 3 MIC2 42 TTXA 41 CRIN 47N VL Figure 8-8. CTXA 1U RGR GR 40 CH 68N RH 4 MIC1 RECO 39 100 RDC 7 VL 3K 10 9 SENSE RSENSE 10 VB RSAO VM 33 CM 100U IM 11 SAO 100K STO 32 open RREF IREF 31 62K RAGA AGA 30 TLDR CMP 4.7U RVMP 29 TLDT 28 CLDR 1N CLDT 1N 13 VMP 1.65K INLDR 27 2MEG 2.2N 2MEG DC 25 20 IMPSEL GSA 22 + open RGSA CSACL 21 TSACL SAI 23 RATAFS VMU TX ATAFS MUTX 24 + 1U 26 DC VIMPSEL 2.2N INLDT on adapter cause of stability s2a b IB CB RNW2 STI 36 8 GND c DC VB S1 6 IND VM IL 10U CIND S4 19 4518C–CORD–10/05 DC Voltage Current Test GR 40 4 MIC1 RH RECO 39 VM 3K RSAO 11 SAO 100K CM 100U IM 10 VB VM 33 ISTO STO 32 + S12 s2 b 10 a CB S6 8 GND 9 SENSE RSENSE RREF IREF 31 62K RAGA AGA 30 TLDR CMP 4.7U RVMP 29 TLDT 28 CLDR 1N CLDT 1N 13 VMP 1.65K INLDR 27 2MEG 2.2N 2MEG 2.2N 26 ATAFS 25 CSACL ISACL GSA 22 open RGSA S4 1U VSACL DC 20 21 TSACL SAI 23 + DC + IMPSEL RATAFS + VMU TX INLDT MUTX 24 20 ISTIHS RNW2 STI 36 VAGA DC 7 VL S8 6 IND VSTO DC 10U CIND IL VB DC + CH 68N 100 RDC S1 + DC RGR IAGA CMIC 68N 3 MIC2 VTXA TTXA 41 CTXA 1U on adapter cause of stability 1 DTMF CRIN 47N VM open 42 ITXA RECIN VL 44 GT GT ID C U7 S10 RGS S5 Figure 8-9. U4089B-P 4518C–CORD–10/05 U4089B-P Figure 8-10. DC Ramps RGS 44 GT GT open CMIC 68N VL TTXA 41 CTXA 1U RGR GR 40 RH 4 MIC1 RECO 39 CH 68N 100 RDC 10U CIND s4 s1 IL + VB RNW2 7 VL STI 36 3K b 10 a 11 SAO VM 33 b STO 32 offen RREF + ILCUR IREF 31 62K RAGA AGA 30 TLDR 4.7U s5 29 TLDT 28 CLDR 1N CLDT 1N 13 VMP + VMP INLDR 27 2MEG 2.2N 2MEG ATAFS 25 MUTX 24 + 20 IMPSEL GSA 22 + offen RGSA 1U CSACL 21 TSACL SAI 23 RATAFS DC DC 26 VMU TX VIMPSEL 2.2N INLDT on adapter cause of stability CMP 4.7U 1.65K DC CM 100U IM 10 VB a S4 s2 9 SENSE RSENSE RSAO 100K 6 IND 8 GND CB DC 42 VM DC DTMF 3 MIC2 + DC 1 CRIN 47N VL RECIN 21 4518C–CORD–10/05 Figure 8-11. AC Tests RGS RECIN open CMIC 68N VL 42 TTXA 41 CTXA 1U RGR GR 40 RH 4 MIC1 RECO 39 CH 68N 100 RDC RNW2 7 VL STI 36 3K CM 100U STO 32 open RREF + ILCUR IREF 31 62K RAGA AGA 30 TLDR 29 4.7U TLDT 28 CLDT 1N s5 13 VMP INLDR 27 + VMP DC 1.65K CLDR 1N 2MEG 2.2N 2MEG DC 25 20 IMPSEL GSA 22 + open RGSA CSACL 21 TSACL SAI 23 RATAFS DC ATAFS MUTX 24 + 1U 26 VMU TX VIMPSEL 2.2N INLDT on adapter cause of stability 11 SAO VM 33 IM a 10 VB b 100K SENSE a S4 s2 9 RSENSE IDC b 10 RSAO 22 VM 10U CIND s4 VB s1 IL + DC 6 IND 8 GND CB DC DTMF 3 MIC2 + DC 1 CRIN 47N VL 44 GT GT U4089B-P 4518C–CORD–10/05 U4089B-P Table 8-2. Typical Values of External Components (see Figure 8-12 on page 24) Name Value Name Value Name Value Name Value C2 4.7 nF C16 47 µF R3 >68 kΩ R16 1 kΩ C3 10 µF C17 10 µF R4 10 kΩ R17 1.2 kΩ C4 220 µF C18 10 µF R6 62 kΩ R18 30 kΩ C5 47 µF C21 1 µF R8 22 kΩ R21 15 kΩ C7 1 µF C23 6.8 nF R9 330 kΩ R22 330 kΩ C8 100 µF C24 10 nF R10 3 kΩ R23 220 kΩ C10 150 nF C25 100 nF R11 62 kΩ R24 68 kΩ C11 68 nF C26 470 nF R12 30 kΩ R25 2 kΩ C12 33 nF C27 33 nF R13 62 kΩ R26 3.3 kΩ C14 100 nF C28 10 µF R14 120 kΩ R29 1 kΩ C15 1 µF R2 20 kΩ R15 47 kΩ R30 12 kΩ 23 4518C–CORD–10/05 DTMF 24 C 26 C 27 R 16 R 17 Loud speaker LOGTX RECO R 22 R 23 R 29 R 30 C 25 R 14 C 14 C 15 C 16 C 17 C 18 C 21 Microphone R 18 R 15 C 24 R 26 23 21 11 25 28 29 26 27 22 44 41 1 3 4 R 13 R1 32 R 12 C2 24 7 13 V 30 Earpiece 39 R2 C3 6 C 28 R3 9 R 11 40 U4089B-P VM R 24 HF-Mic C 23 R 25 VM R 10 R4 10 to pin 32 VM VL 8 VM VM R8 36 33 C8 C 11 R9 3 C5 C 12 C4 C 10 LOGTX 42 29 31 R6 R 21 BC177 VB Micro controller hook switch V MP Ring C7 Tip Figure 8-12. Application for Hands-free Operation U4089B-P 4518C–CORD–10/05 U4089B-P 9. Ordering Information Extended Type Number Package Remarks U4089B-PFNY SSO44 Tubes, Pb-free U4089B-PFNG3Y SSO44 Taped and reeled, Pb-free 10. Package Information 9.15 8.65 Package SSO44 Dimensions in mm 18.05 17.80 7.50 7.30 2.35 0.3 0.25 0.10 0.8 16.8 44 0.25 10.50 10.20 23 technical drawings according to DIN specifications 1 22 25 4518C–CORD–10/05 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Regional Headquarters Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland Tel: (41) 26-426-5555 Fax: (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany Tel: (49) 71-31-67-0 Fax: (49) 71-31-67-2340 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France Tel: (33) 2-40-18-18-18 Fax: (33) 2-40-18-19-60 ASIC/ASSP/Smart Cards 1150 East Cheyenne Mtn. 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