Utc Tea1098a Linear Integrated Circuit

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UTC TEA1098A LINEAR INTEGRATED CIRCUIT SPEECH AND HANDSFREE DESCRIPTION The UTC TEA1098A is designed to includes a line interface, handset (HS) microphone and earpiece amplifiers, handsfree (HF),microphone and loudspeaker amplifiers and a duplex controller with signal and noise monitors on both channels for telephony applications. It also equipped with Digital volume control for both earphone and loudspeaker amplifiers. SSOP-40 FEATURES Line interface *Operating voltage down to 1.6 V . *Built-in adjustable DC voltage regulator *Transmitting amplifier Usable with dynamic, magnetic , piezo-electric or electricmicrophones *Receiving amplifier for dynamic, magnetic or piezo-electric earpieces with AGC for line loss compensation. *DTMF input for confidence tone *MUTE input for pulse or DTMF dialling Supplies *Provides 3.35V regulated supply for microcontrollers or dialers * Optimized power supply that depends on line current *Filtered 2.0V for electric microphone *Pd pin that can have chip power-down. SOP-40 *Pb-free plating product number: TEA1098AL APPLICATIONS *Line powered telephone sets. Handsfree *Asymmetrical high input impedance for electreic microphone *Loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain * Loudspeaker amplifier with Dynamic limiter and 8 steps digital volume control *Duplex controller with Signal and noise envelope monitors for both channels and have sensitivities and switch-over and idle mode timing adjustable. * Voice switch control have adjustable switching range and constant sum of gain during switching UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION PD 40 HFC HFTX 2 39 BPC 3 38 RECO EVCI 4 37 GARX MUTE UTC 1 LVCI 5 36 EARO HFRX 6 35 DTMF TNOI 7 34 MIC+ TENV 8 33 MIC- TSEN 9 32 GNDTX TXIN RNOI 10 31 RSEN 11 30 GATX RENV 12 29 TXOUT DLC 13 28 IDT VBB 14 27 SWT GALS 15 26 SWR LSAO 16 25 STAB GND 17 24 MICS SLPE 18 23 VDD LN 19 22 AGC REG 20 21 IR UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION SYMBOL PD MUTE BPC EVCI LVCI HFRX TNOI TENV TSEN RNOI RSEN RENV DLC VBB GALS LSAO n.c. GND SLPE LN REG IR AGC VDD MICS STAB SWR n.c. SWT IDT TXOUT GATX TXIN GNDTX MICMIC+ DTMF EARO GARX RECO HFTX HFC UTC PIN No. PAD No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 40 41 42 43 44 1 2 3 4 5 6 7 8 9 10 11 12 13 14 and 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 and 31 32 33 34 35 36 37 38 39 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 DESCRIPTION Power-down input (active LOW) Logic input (active LOW) Logic input (active LOW) Logic input for digital volume control (earpiece and loudspeaker LSB) Logic input for digital volume control (loudspeaker MSB) Receive input for loudspeaker amplifier Transmit noise envelope timing adjustment Transmit signal envelope timing adjustment Transmit signal envelope sensitivity adjustment Receive noise envelope timing adjustment Receive signal envelope sensitivity adjustment Receive signal envelope timing adjustment Dynamic limiter capacitor for the loudspeaker amplifier Stabilized supply for internal circuitry Loudspeaker amplifier gain adjustment Loudspeaker amplifier output Not connected Ground reference Line current sense Positive line terminal Line voltage regulator decoupling Receive amplifier input Automatic gain control or line loss compensation 3.35V regulated voltage supply for microcontrollers Microphone supply Reference current adjustment Switching range adjustment Not connected Switch-over timing adjustment Idle mode timing adjustment Handsfree microphone amplifier output Handsfree microphone amplifier gain adjustment Handsfree microphone amplifier input Ground reference for microphone amplifiers Negative handset microphone amplifier input Positive handset microphone amplifier input Dual tone multi-frequency input Earpiece amplifier output Earpiece amplifier gain adjustment Receive amplifier output Transmit input for line amplifier Logic input UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL Positive continuous line voltage Repetitive line voltage during switch-on or line interruption Maximum voltage on pins REG, SLPE, IR and AGC Maximum voltage on all other pins except VDD Maximum line current Total power dissipation (Ta=75℃) Storage temperature Ambient temperature Junction temperature VLN Vn (max) IIine Ptot Tstg Ta Tj RATINGS UNIT -0.4 ~ +12 -0.4 ~ +13.2 -0.4 ~ VLN+0.4 -0.4 ~ VBB+0.4 130 400 -40 ~ +125 -25 ~ +75 125 V V V V mA mW ℃ ℃ ℃ ELECTRIC CHARACTERISTICS (Iline=15mA, RSLPE=20Ω, Zline=600Ω, f=1kHz, Ta=25℃, pin AGC connected to pin LN, PD=HIGH, HFC=LOW, MUTE=HIGH, BPC=HIGH, all DC levels are referenced to GND, unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT 3.4 5.7 3.7 6.1 4 6.5 V V Supplies LINE INTERFACE AND INTERNAL SUPPLY (pins LN,SLPE,REG and VBB) Stabilized voltage between IIine=15mA VSLPE pins SLPE and GND IIine=70mA Stabilized voltage with an external resistor RVA between REG and RVA = 40 kΩ VREF SLPE Stabilized voltage variation with temperature referenced △VREF(T) Ta=-25 to +75℃ to 25 ℃ Line voltage VLN Regulated supply voltage for internal circuitry VBB Line current for voltage increase IIine Regulated voltage variation with temperature referenced to 25℃ △VBB(T) Current available on pin VBB IBB IIine=1mA IIine=4mA IIine=15mA IIine=130mA IIine=15mA, IBB=0 IIine=70mA, IBB=0 Start current Stop current 3.7 2.75 4.9 Ta=-25 ~ +75℃ In speech mode In handsfree mode 4.5 V ±60 mV 1.55 2.35 4.0 8.7 3.0 5.3 18 45 V V V V V V mA mA 4.3 9.3 3.25 5.7 ±30 mV 11 9 mA SUPPLY FOR PERIPHERALS (pin VDD) Regulated supply voltage on VDD Regulated voltage variation with temperature referenced to 25℃ Current consumption on VDD VDD △VDD(T) IDD Current sunk from external source IDD(ext) Current available for peripherals IDD(o) UTC VBB>3.35V+0.25V(typ.) Otherwise Ta=-25 to +75℃, VBB>3.35V+0.25V(typ.) In trickle mode, IIine=0mA, VDD=1.5V, VBB discharging In ringer mode, Iline = 0, VDD = 3.35 V VDD=3.3V 3.1 3.35 VBB-0.25 3.6 ±30 15 V V mV 150 nA 75 mA -3 mA UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R108-016,C UTC TEA1098A PARAMETER LINEAR INTEGRATED CIRCUIT SYMBOL SUPPLY FOR MICROPHONE (pin MICS) Supply voltage for a microphone VMICS POWER-DOWN INPUT (PIN PD) LOW-level input voltage VIL HIGH-level input voltage VIH Input current at low voltage Ii(PD)(l) Current consumption on VBB IBB(PD) during power-down phase TEST CONDITIONS MIN TYP MAX 2.0 -0.4 1.4 -3 PD=LOW UNIT V +0.3 VBB+0.3 -6 V V μA μA 460 TX Amplifiers TX HANDSET MICROPHONE AMPLIFIER (pins MIC+, MIC- and LN) Voltage gain from pins MIC+/MICGv(MIC-LN) VMIC = 5 mV (RMS) to LN Gain variation with frequency △Gv(f) f = 300 ~ 3400 Hz referenced to 1 kHz Gain variation with temperature △Gv(T) Ta = -25 ~ +75°C referenced to 25°C Common mode rejection ratio CMRR Total harmonic distortion at LN Noise output voltage at pin LN, pins MIC+/MIC- shorted through 200Ω Gain reduction when muted THD △Gv(mute) DTMF AMPLIFIER (pins DTMF, LN and RECO) Voltage gain from Gv(DTMF-LN) pins DTMF to LN Gain variation with frequency △Gv(f) referenced to 1 kHz Gain variation with temperature △Gv(T) referenced to 25°C Gain reduction if not active △Gv(mute) Voltage gain from pin DTMF to Gv(DTMF-RECO) RECO in handsfree mode Digital volume control adjustment range in handset mode Digital volume control adjustment step in handset mode Gv(DTMF-RECO) △Gv(DTMF-RECO) △Gv(DTMF-RECO) UTC THD VHFTX(rms) 45.3 MUTE=0, see Table 2 VMIC = 10 mV (RMS), MUTE = 1, BPC = 0, see Table 2 60 VDTMF = 50 mV (RMS) 24.35 dB dB ±0.25 dB 80 2 dB % 10 % VLN = 1.4 V (RMS) Iline = 4 mA, VLN = 0.12 V (RMS) -77 dBmp 80 dB 60 dB 25.35 26.35 dB f = 300 ~ 3400 Hz ±0.25 dB Ta = −25 ~ +75°C ±0.25 dB MUTE=1, see Table 2 VDTMF = 50 mV (RMS), MUTE = 0, HFC = 1 VDTMF = 50 mV (RMS), MUTE = 0, HFC = 0, EVCI=0 VDTMF = 50 mV (RMS), MUTE = 0, HFC = 0 MUTE = 0, HFC = 0, per step TX AMPLIFIER USING HFTX (pins HFTX AND LN Voltage gain from pin HFTX to LN Gv(HFTX-LN) VHFTX = 15 mV (RMS) Gain variation with frequency △Gv(f) f = 300 ~ 3400 Hz referenced to 1 kHz Gain variation with temperature △Gv(T) Ta = -25 ~ +75°C referenced to 25°C Total harmonic distortion at LN Maximum input voltage at HFTX (RMS value) 44.3 ±0.25 Vno(LN) Gain reduction in microphone mute △Gv(MIC)(mute) mode Voltage gain from pin DTMF to RECO in handset mode 43.3 VLN = 1.4 V (RMS) Iline = 70 mA, THD = 2% 60 33.5 80 dB -17 dB -28.2 dB -12.75 dB 4.25 dB 34.7 35.9 dB ±0.25 dB ±0.35 dB 2 85 % mV UNISONIC TECHNOLOGIES CO., LTD. 5 QW-R108-016,C UTC TEA1098A PARAMETER LINEAR INTEGRATED CIRCUIT SYMBOL TEST CONDITIONS Noise output voltage at pin LN; pin HFTX shorted to GND Vno(LN) through 200Ω in series with 10μF Gain reduction when muted △Gv(mute) MUTE = 0, see Table 2 Gain reduction in microphone mute MUTE = 1, BPC=0, △Gv(MIC)(mute) mode see Table 2 MIN 60 TYP MAX UNIT -77 dBmp 80 dB 60 dB RX Amplifiers RX AMPLIFIERS USING IR(pins IR and RECO) Roltage gain from pin IR to RECO Gv(IR-RECO)(HF) (handset mode) Voltage gain from pin IR to RECO Gv(IR-RECO)(HS) (handsfree mode) Digital volume control adjustment △Gv(IR-RECO) range in handset mode Digital volume control adjustment △Gv(IR-RECO) step in handset mode Gain variation with frequency △Gv(f) referenced to 1 kHz Gain variation with temperature △Gv(T) referenced to 25℃ Maximum input voltage on IR VIR(rms)(max) (referenced to LN) (RMS value) Maximum output voltage on VRECO(rms)(max) RECO (RMS value) Noise output voltage at pin RECO, pin IR is an Vno(RECO)(rms) open-circuit (RMS value) Gain reduction if not activated △Gv(mute) VIR=4mV(RMS), HFC=1 VIR=4mV(RMS), HFC=0, EVCI=0 VIR=4mV(RMS), HFC= 0, EVCI = VDD UTC 30.4 dB 16.2 17.2 18.2 dB 13 14.5 16 dB +4.85 dB f = 300 ~ 3400 Hz ±0.25 dB Ta = -25 ~ +75℃ ±0.3 dB 50 mV 0.9 V -84 dBVp 80 dB Iline= 70 mA, THD = 2% THD=2%, Gv(RECO-EARO)=12dB Logic Inputs(pins HFC MUTE and BPC) LOW-level input voltage VIL HIGH-level input voltage VIH Ii(l) 29.4 HFC = 0, per step MUTE = 0, see Table 2 RX EARPIECE AMPLIFIER (pins GARX and EARO) Gain voltage range between △Gv(RECO-EARO) pins RECO and EARO Maximum output voltage on EARO sine wave drive, VEARO(rms)(max) (RMS value) RL=150Ω, THD < 2% Noise output voltage at pin EARO, Gv(EARO)=12dB, pin IR is an open-circuit Vno(EARO)(rms) EVCI=0 (RMS value) Automatic Gain Control (pin AGC) Gain control range for transmit Iline = 70mA, Gv(MIC-LN), and receive amplifiers affected Gv(IR-RECO), RAGC=0 △Gv(trx) by the AGC, with respect to Iline= 70mA for Iline = 15mA Gv(HFTX-LN), RAGC=0 Highest line current for maximum Istart gain Lowest line current for maximum Istop gain Istart adjustment range with RAGC △Istart Input current at low voltage for pin HFC for pin MUTE for pin BPC 28.4 0.75 60 0 0.75 20 0.9 V -84 dBVp 5.45 6.45 7.45 dB 5.8 6.8 7.8 dB 23 mA 57 -0.4 1.4 VBB = 3.0 V dB mA 40 mA +0.3 VBB+0.3 V V 0 -5 -2.5 μA UNISONIC TECHNOLOGIES CO., LTD. 6 QW-R108-016,C UTC TEA1098A PARAMETER LINEAR INTEGRATED CIRCUIT SYMBOL Input current at high voltage for pin HFC for pin MUTE for pin BPC Ii(h) TEST CONDITIONS MIN TYP MAX 2.5 0 0 VBB = 3.0 V UNIT μA Handsfree mode (HFC = HIGH) HF MICROPHONE AMPLIFIER (pins TXIN, TXOUT and GATX) Voltage gain from pin TXIN to VTXIN = 3 mV (RMS), Gv(TXIN-TXOUT) TXOUT RGATX = 30.1kΩ Voltage gain adjustment with △Gv RGATX Gain variation with frequency △Gv(f) f = 300 ~ 3400 Hz referenced to 1 kHz Gain variation with temperature △Gv(T) Ta = -25 ~ +75 ℃ referenced to 25 ℃ Noise output voltage at pin TXOUT, pin TXIN is shorted Gv(TXIN)=15dB, Vno(TXOUT)(rms) through 200Ω in series with RMS value 10μF to GNDTX △Gv(mute) Gain reduction when muted MUTE = 0, see Table 2 VTXIN = 10 mV (RMS), △Gv(SEC) Gain reduction in secret mode MUTE = 1, BPC = 0, see Table 2 HF LOUDSPEAKER AMPLIFIER (pins HFRX, LSAO, GALS and DLC) VHFRX = 30 mV (RMS), Voltage gain from pin HFRX to Gv(HFRX-LSAO) RGALS = 255 kΩ, LSAO LVCI=VDD, EVCI=VDD Digital volume control adjustment VHFRX = 30 mV (RMS), △Gv(HFRX-LSAO) range RGALS = 255 kΩ Digital volume adjustment step △Gv(step) Per step Voltage gain adjustment with △Gv RGALS Gain variation with frequency f = 300 ~ 3400 Hz △Gv(f) referenced to 1 kHz Gain variation with temperature △Gv(T) Ta = -25 ~ +75℃ referenced to 25℃ Iline = 70 mA, RGALS = 33 kΩ, for Maximum input voltage at pin VHFRX(rms) (max) HFRX (RMS value) THD = 2% in the input stage Noise output voltage at pin LSAO, pin HFRX is Vno(LSAO)(rms) LVCI=VDD, EVCI=VDD open-circuit (RMS value) △Gv(mute) See Table 2 Gain reduction if not activated Output voltage capability (RMS IBB = 0 mA, IDD = 1 mA value) at pin LSAO with sine Iline = 18 mA wave signal and loaded VLSAO(rms) Iline = 30 mA with 50Ω + 220μF, GvLSAO = 28 dB Iline > 50 mA Maximum output current at ILSAO(max) pin LSAO (peak value) DYNAMIC LIMITER (pins LSAO AND DLC) VHFRX jumps up from 20 mV to 20 mV + 10 Attack time tatt dB VBB jumps below VBB(th) UTC 12.7 15.2 -15 60 17.7 dB +16 dB ±0.1 dB ±0.15 dB -101 dBVp 80 dB 60 dB 24.5 27 29.5 dB 25.5 27 28.5 dB 3.85 -28 dB +7 ±0.3 dB ±0.3 dB 580 mV -79 dBVp 60 150 dB dB 0.9 1.3 1.6 V 300 mA 5 1 ms ms UNISONIC TECHNOLOGIES CO., LTD. 7 QW-R108-016,C UTC TEA1098A PARAMETER Total harmonic distortion LINEAR INTEGRATED CIRCUIT SYMBOL TEST CONDITIONS THD VHFRX = 20 mV +10 dB; t > tatt MIN TYP MAX UNIT 1 2 % VBB limiter threshold VBB(th) 2.7 MUTE RECEIVE (pin DLC) Threshold voltage required on pin DLC to obtain mute receive VDLC(th) 0.2 condition Threshold current sourced by pin DLC in mute receive IDLC(th) VDLC = 0.2 V 100 condition Voltage gain reduction in mute △Gvrx(mute) VDLC = 0.2 V 60 80 receive condition TX and RX ENVELOPE and NOISE DETECTORS (pins TSEN, TENV, TNOI, RSEN, RENV and RNOI) Logarithmic compressor and sensitivity adjustment Sensitivity detection on pin TSEN, voltage change on △Vdet(TSEN) ITSEN = 0.8 ~ 160μA 18 pin TENV when doubling the current from TSEN Sensitivity detection on pin RSEN, voltage change on pin RENV when △Vdet(RSEN) IRSEN = 0.8 ~ 160μA 18 doubling the current from RSEN Signal envelope detectors Maximum current sourced from Isource(ENV) 120 pin TENV or RENV Maximum current sunk by pin Isink(ENV) -1.25 -1 -0.75 TENV or RENV 10μA is sourced from Voltage difference between pins both RSEN and TSEN, △VENV ±3 RENV and TENV signal detectors tracking, note 1 Noise envelope detectors Maximum current sourced from Isource(NOI) 0.75 1 1.25 pin TNOI or RNOI Maximum current sunk by Isink(NOI) -120 pin TNOI or RNOI 5μA is sourced from Voltage difference between both RSEN and TSEN, △VNOI ±3 pins RNOI and TNOI noise detectors tracking, note 1 DIAL TONE DETECTOR Threshold level at pin HFRX RRSEN = 10 kΩ, 25 VHFRX(th)(rms) (RMS value) CRSEN=100nF TX LEVEL LIMITER Threshold level at pin TXIN RTSEN = 10 kΩ VTXIN(th)(rms) 0.75 (RMS value) DECISION LOGIC (pins IDT AND SWT) Signal recognition Threshold voltage between RENV/ RNOI or between TENV/TNOI to VHFRX < VHFRX(th), △VSrx(th) 13 VTXIN < VTXIN(th), note 2 switch-over from Idle mode to RX/ TX mode Switch-over Current sourced from pin SWT Isource(SWT) 7.5 10 12.5 when switching to receive mode Current sunk by pin SWT when Isink(SWT) -12.5 -10 -7.5 switching to transmit mode UTC UNISONIC TECHNOLOGIES CO., LTD. V V μA dB mV mV μA μA mV μA μA mV mV mV mV μA μA 8 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL TEST CONDITIONS MIN Current sourced from pin SWT in Iidle(SWT) Idle mode VOICE SWITCH (pins STAB AND SWR) Switching range SWR Switching range adjustment RSWR =365 kΩ △SWR Voltage gain variation from SWRA=40 dB transmit or receive mode to Idle △Gv mode Gain tracking (Gvtx + Gvrx) during Gtr switching, referenced to Idle mode Notes 1. Corresponds to ±1dB tracking. 2. Corresponds to 4.3dB noise/speech recognition level. TYP MAX UNIT 0 μA 40 -40 dB dB +12 ±20 dB ±0.5 dB TEST CIRCUIT Iline Zimp 620Ω i=15mA RSLPE 20Ω VIR Cemc 10nF Dz Vd=10V Cimp 100μF 4.7μF SLPE REG AGC LN 22 19 18 20 CIR + + CREG IR CVBB 470μF + VBB 14 21 100nF CMICS + MICS 4.7μF VMIC RMIC 200Ω 24 MIC+ MIC- CHFTX HFTX TXOUT CTXIN VHFTX GATX 100nF TSEN TENV VDTMF TNOI 39 UTC TEA1098A 29 30 TXIN 100nF CDTMF DTMF VTXIN 31 35 11 9 12 8 7 10 17 RTSEN 10kΩ CTSEN 100nF UTC GND CTENV 470nF + CGAR Re2 RQR 100pF 100kΩ 150Ω + CQR CGARS Re1 4.7μF 1nF 100kΩ Ccxe RECO 100nF 38 VHFRX CHFRX HFRX 6 100nF GALS 15 CGALS RGALS LSAO 255kΩ 150pF 16 37 33 100nF RGATX 30.1kΩ 34 CVDD 47μF VDD 23 4 EVCI LVCI 5 BPC 3 1 PD HFC 40 MUTE 2 EARO 36 + CTNOI 4.7μF 32 GNDTX 25 26 STAB SWR RSTAB 3.65kΩ RSWR 365kΩ 13 27 DLC 28 GARX RSEN RENV + RNOI IDT SWT + CDLC 470nF CSWT 220nF RRSEN 10kΩ RIDT 2.2MΩ CRNOI 4.7μF CRENV 470nF UNISONIC TECHNOLOGIES CO., LTD. CLSAO 220μF RLSAO 50Ω CRSEN 100nF 9 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT RVCIL Rbal2 820Ω D2 10nF + RSLPE CREG CVBB CVDD 4.7μF 20Ω 180kΩ + 470μF + 47μF SLPE REG AGC LN VBB EVCI LVCI VDD 4 5 22 19 14 23 18 20 Rbal1 Rast3 Zimp 620Ω Cemc D3 Dz Vd=10V 220nF 130Ω Rast2 3.92kΩ + 392Ω CIR IR 21 100nF Cimp 22μF 3 Rast1 130kΩ MICS MICS RMICP 1kΩ 22nF handset micro A Ctx2 CMICH 33nF Ctx1 B 15kΩ Rtx1 MIC+ Rtx3 8.2kΩ MICCHFTX 1kΩ 100nF TXOUT RBMICS 2kΩ RGATX 30.1kΩ HFTX GATX CTXIN CMICB 100nF 33nF TXIN CDTMF DTMF 100nF TSEN TENV TNOI D1 D4 1 40 24 4.7μF 22nF 15kΩ RMICM from MICS handsfree micro CMICS + Rtx2 LV0 360kΩ RVCIH Cbal 2 34 36 37 33 LV1 LV2 BPC PD HFC MUTE 38 6 30 15 31 16 35 11 9 12 8 10 17 RTSEN 10kΩ 32 GND + CTENV CTNOI 470nF CQR MUTE 10μF GARX CGAR + Re2 100PF 100kΩ CGARS 1nF 100kΩ UTC TEA1098A 100nF HFC Re1 29 CTSEN PD EARO 39 7 from microcontroller BPC 25 GNDTX 26 STAB 4.7μF 13 27 DLC SWR 28 Crxe RECO HFRX 100nF CHFRX 100nF RGALS 255kΩ GALS CGALS 150pF LSAO 220μF RSEN RENV RNOI IDT SWT RRSEN 10kΩ RIDT 2.2MΩ + RSTAB RSWR 3.65kΩ 365kΩ CLSAO + CDLC CSWT 470nF 220nF CRNOI 4.7μF CRENV CRSEN 100nF 470nF DUPLEX CONTROLLER to microphone from amplifier SWT VOICE SWITCH from volume control 25 STAB RSTAB 26 SWR RSWR to loudspeaker amplifier Fig. 7 Voice switch UTC UNISONIC TECHNOLOGIES CO., LTD. 10 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT Logic Inputs Table 2 Selection of transmit and receive channels for 5 different application modes LOGIC INPUTS FEATURES HFC MUTE BPC 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1 APPLICATION EXAMPLES DTMF to RECO, RECO to EARO, MICS is active DTMF to LN, DTMF to RECO, RECO to EARO, MICS is active IR to RECO, RECO to EARO, MICS is active MIC to LN, IR to RECO, RECO to EARO, MICS is active DTMF to RECO, HFRX to LSAO, MICS is active DTMF to LN, DTMF to RECO, HFRX to LSAO, MICS is active IR to RECO, HFRX to LSAO, MICS is active TXIN to TXOUT, HFTX to LN, IR to RECO, HFRX to LSAO, MICS is active handset beep mode handset dialling mode handset secret mode handset conversation mod handsfree beep mode handsfree dialling mod handsfree secret mode handsfree conversation mode 160 Iline (mA) 120 (1) (2) (3) (4) (5) (6) 80 40 0 2 4 8 6 10 12 VSLPE (V) CURVE Ta(℃) Ptot(mW) (1) 25 790 (2) 35 710 (3) 45 630 (4) 55 550 (5) 65 470 (6) 75 390 Safe operating area UTC UNISONIC TECHNOLOGIES CO., LTD. 11 QW-R108-016,C UTC TEA1098A LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UTC UNISONIC TECHNOLOGIES CO., LTD. 12 QW-R108-016,C