U3762MB Universal Telephone IC * All Functions Integrated Description TEMIC’s low-voltage telephone circuit U3762MB performs all the speech and line interface functions required in an electronic telephone set, the tone ringer, the pulse and DTMF dialing with redial. Operation below 15 mA is possible with reduced performance (no dialing). Features Speech Circuit Tone Ringer D Adjustable DC characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or D 2-tone ringer piezo-electric earpieces D Adjustable volume D RC oscillator D Automatic line-loss compensation D Anti-clipping in transmit direction D Adjustable threshold Dialer Benefits D DTMF / pulse switchable D Pulse dialing 66/33 or 60/40 or DTMF dialing selectable by pin D D D D D Low number of external components D High quality through one IC solution Flashing time duration 98 ms Pause function Last number redial up to 32 digits Standard low-cost crystal 3.57 MHz or ceramic resonator D Key tone Ordering Information Type Package U3762MB-MFN SSO44 U3762MB-MFNG3 SSO44 Rev. A1, 15-Sep-98 Remarks Taped and reeled 1 (23) Preliminary Information 5 8 4 7 */T 0 2 1 F 2 (23) Preliminary Information 150 k W 1 nF # R/P 9 6 3 HFO HFI RCK TEST MUTE MFIND R4 R3 R2 R1 C4 C3 C2 C1 KT Earth XT 5.1 V XT Handsfree control logic Key– board inter– face Clock generator 3.58 MHz Clock signal oscillator Location latch RAM Data latch & decoder MODE Read – write counter HKS to key board matrix 1 kW Mask 470 nF Pulse control logic Divider Divider Supply ROW & column programmable counter Control logic PRIND VI DP Bandgap reference Tone signal generator Power on reset MIC1 Mute control + – MIC2 220 nF Comparator with hysteresis AGC current generator MICO 220 nF MPSA42 Supply current regulator Micro– phone amplifier 18 k W MFO D/A converter VDD 470 m F Transmit amplifier Control function Control function TIN 33 k W HKS Receiving amplifier Receiver attenuation Sidetone amplifier CL 2.2 nF 2N5401 3 kW 100 k W 2.4 k W THA 680W 47 nF 3.3 nF 1W 39 W 10 k W 10 mF 12 k W 100 W 10 k W VRIAC OUT VRING VI RDC AGC RECO2 RECO1 2.2 mF RECIN ST VL CLIM 470 W 2.2 mF HKS 220 k W 1 mF 14912 100 mF 300 W 1.8 k W 330 W 13 V/ 1W 75 V 5 MW Ring Tip U3762MB Block Diagram / Applications Figure 1. Rev. A1, 15-Sep-98 U3762MB Pin Description C1 1 44 R4 C2 2 43 R3 C3 3 42 R2 C4 4 41 R1 Earth 5 40 Mask HFI 6 39 DP HFO 7 38 MODE XT 8 37 KT XT 9 36 HKS MFO 10 35 n.c. MFIND 11 34 TEST GND 12 33 VDD MIC 1 13 32 OUT MIC 2 14 31 RCK MICO 15 30 VRING VL 16 29 VRIAC U3762MB 28 RDC 17 AGC 27 THA TIN 18 26 ST VI 19 MUTE 20 25 CLIM PRIND 21 24 RECO 1 23 RECO 2 RECIN 22 14835 SSO44 Rev. A1, 15-Sep-98 3 (23) Preliminary Information U3762MB Pin Symbol 1 C1 Function Configuration VDD Keyboard input C1 2 Ê Ê Ê Ê ÊÊ Ê Ê C2 VDD PD 3 VDD C3 C2–C4 4 C4 VDD PD = Protection Device 5 Earth VDD Earth key ( 604 ms high pulse, 1 s pause) EARTH HFI ÊÊ Input with 200 kW pull-down resistor. HFI triggers HFO with each LH edge. Ê ÊÊ HFI VDD 200K 6 PD VDD PD 7 8 9 HFO XT XT Output will be toggled by each LH edge at HFI. A built-in inverter provides oscillation with an inexpensive 3.579545-MHz crystal or ceramic resonator VDD HFO XT Ê PD VDD Ê VDD XT Ê PD VDD Ê VDD PD 10 MFO Output of DTMF DTMF output frequency Specified Actual (Hz) (Hz) 697 699 R1 770 766 R2 852 848 R3 941 940 R4 C1 1209 1216 1336 1332 C2 1477 1472 C3 Error (%) +0.28 –0.52 –0.47 –0.10 +0.57 –0.30 –0.34 Ê Ê Ê VDD MFO 4 (23) VDD PD Rev. A1, 15-Sep-98 Preliminary Information U3762MB Pin Symbol 11 MFIND Function Configuration Ê Output switches to low being in temporary DTMF mode. Reset by on hook condition. MFIND VDD MFIND PD 12 GND Ground 13 MIC 1 Inverting input of microphone amplifier Ê VI 14 MIC 2 Non-inverting input of microphone amplifier 1V 50K PD MIC1 Ê Ê Ê Ê Ê MIC2 50K 1V VI PD 15 MICO VI Transmit pre-amp output which is normally capacitively coupled to Pin TIN 1V 16K MICO PD 16 VL Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal. VL PD 16V RDC Ê PD 17 18 RDC TIN An external resistor (1 W) is required from this pin to GND to control the DC input impedance of the circuit. It has a nominal value of 39 W for low-voltage operation. Values up to 100 W may be used to increase the available transmit output voltage swing at the expense of low-voltage operation. VL AGC PD RDC PD ÊÊ ÊÊ 1V Input to the line output driver amplifier. Transmit AGC applied to this stage. 5.6K TIN 16V PD Rev. A1, 15-Sep-98 5 (23) Preliminary Information U3762MB Pin Symbol 19 VI 20 MUTE Function Configuration This internal voltage bias line must be connected to VL via an external resistor which dominates the AC input impedance of the circuit and should be 680 Ω for an 600-W input impedance or 1.2 kΩ for a 900-Ω input impedance. Ê VI 16V PD Pin for testing Ê VBG 30K MUTE MUTE PD 21 22 PRIND RECIN 23 RECO2 24 RECO1 PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active Receive amplifier input. The receiving amplification is regulated by an AGC. Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 W can be directly driven by these outputs. 6.7V VL PRIND ÊÊ Ê Ê Ê 6.7V PD 60K RECIN VL 60K RECO2 RECO1 1V 6.7V PD 25 CLIM w Time constant of anticlipping in transmit path. CLIM 2.2 mF CLIM = GND: anticlipping inactive VL CLIM 6V Ê IDC PD 26 27 ST THA The output of the sidetone cancellation signal, which requires a balanced impedance of 8 to 10 times the subscribers line impedance to be connected to Pin VL. Ê ST 16V PD Ê Ê VRIAC Ringer threshold adjustment 140K 12K THA 20K 6V 6V PD 28 AGC The range of transmit and receive gain variations between short and long loops may be adjusted by connecting a resistor RAGC from this pin to (GND). This pin can be left open to set AGC out of action. Ê Ê Ê 1V VL AGC PD RDC 29 VRIAC PD Ringing supply 70K VRIAC 50V PD 6 (23) 10K Ê ÊÊ Rev. A1, 15-Sep-98 Preliminary Information U3762MB Pin Symbol 30 VRING Function DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode. Configuration VRING 30V OUT 50V PD 31 RCK 200 6.5K PD ÊÊÊÊ Ê 3.4V RC clock oscillator for ringer 0.8V RCK 6V 6V PD 32 OUT Buzzer output VRING PD OUT 200 30V 6.5K Ê Ê Ê ÊÊ Ê Ê 50V PD 33 VDD VL Supply output for dialer part VDD 6V 6V TEST PD TEST input with 6.25 kW pull-up resistor VDD VDD 200K 34 TEST VDD PD n.c. Not connected 36 HKS Hook switch input. HKS = 0: On-hook state. Chip in sleep mode, no operation (with a pull-down resistor of about 400 kW). HKS = 1: Off-hook state. Chip enable for normal operation. 37 KT Ê VDD HKS Keytone output only sent out in pulse mode KT Ê Ê VDD 400k 35 PD VDD Ê VDD PD Rev. A1, 15-Sep-98 7 (23) Preliminary Information U3762MB Pin Symbol 38 MODE 39 40 DP Mask Function Pulling MODE pin to: C3 tone mode with 87 ms burst time and 140 ms pause C4 tone mode with 87 ms DTMF burst and 87 ms pause R1 pulse mode with 20 pps, Make/Break = 40/60 R2 pulse mode with 20 pps, Make/Break = 33/66 R3 pulse mode with 10 pps, Make/Break = 40/60 R4 pulse mode with 10 pps, Make/Break = 33/66 C1 pulse mode with 10 pps, Make/Break = 33/66 and temp. DTMF with 87 ms DTMF burst, 140 ms pause MODE pin pulled to R4: with temporary DTMF, 87 ms DTMF burst and 87 ms pause Pulse dialing output. Flash key will cause DP to be active in either DTMF mode or pulse mode. In On-hook state is DP = VDD. Configuration Ê VDD MODE Ê VDD PD Ê Ê DP VDD Ê Short mute during pulse dialing, active high PD VDD MASK 41 R1 Keyboard input R1 42 43 Ê PD VDD Ê Ê Ê VDD R2 PD VDD R3 R2–R4 VDD 44 R4 PD 8 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ : ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ Keyboard Operation C1 1 4 7 /T C2 2 5 8 0 C3 3 6 9 # D R/P: Redial and pause function key D :/T: : function; C4 R1 R2 R3 R4 F R/P D D F: Flash key : hand set, MIC mute pulse-to-tone function Normal Dialing ÁÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á Á ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á Á ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á OFF HOOK 1. 2. 3. , D1 , D2 , ..., Dn D1, D2, ..., Dn will be dialed out. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits. If redialing length oversteps 32 digits, the redialing function will be inhibited. Redialing ÁÁÁÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á Á ÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ Á Á ÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ Á OFF HOOK , D1 , D2 , ..., Dn BUSY, Come ON HOOK , OFF HOOK , R/P The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes the pause function (3.6 s). Keys stored in redial memory: 0 to 9, *, #, R/P, F Rev. A1, 15-Sep-98 9 (23) Preliminary Information U3762MB HKS tKRD KEY IN 3 4 2 2 tKID tKID DP BM tIDP BM tIDP tPDP tIDP tPDP tIDP MUTE MASK Low MFO Oscillation OSC 15019 Figure 2. Pulse mode normal dialing HKS tKRD KEY IN t<tOHD R/P tKID DP BM tPDP tIDP BM tIDP tIDP MUTE MASK MFO OSC Low Oscillation 15020 Figure 3. Pulse mode auto dialing 10 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB HKS t > tOHD tKRD KEY IN R/P tKID DP BM tIDP tPDP BM tIDP MUTE MASK Low MFO Oscillation OSC 15021 Figure 4. Pulse mode auto dialing HKS tKRD KEY IN 3 4 2 5 tKID DTMF tTD tITP tITP tITP MUTE MASK DP OSC Low High Oscillation 15022 Figure 5. DTMF mode normal dialing Rev. A1, 15-Sep-98 11 (23) Preliminary Information U3762MB HKS tKRD KEY IN t<tOHD R/P tKID DTMF tTD tITP tITP MUTE Low MASK High DP Oscillation OSC 15023 tt Figure 6. DTMF mode auto dialing (t OHD) HKS tKRD KEY IN t > t OHD R/P tKID DTMF tTD tITP MUTE MASK DP OSC Low High Oscillation 15024 ut Figure 7. DTMF mode auto dialing (t OHD) 12 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB Access Pause ÁÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁÁ ÁÁÁ Á Á ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ Á Á ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ Á OFF HOOK , D1 , D2 , R/P , D3 , ..., 1. The pause function can be stored in the memory. 2. The pause function is executed in normal dialing and redialing. Dn’ HKS KEY IN tKID 2 R/P 3 tIDP DP tPDP tPDP MUTE tP MASK MFO OSC Low Oscillation 15025 Figure 8. Pause function Rev. A1, 15-Sep-98 13 (23) Preliminary Information U3762MB : Pulse-to-Tone ( /T) ÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁÁ ÁÁÁ Á : ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁ ÁÁÁ Á OFF HOOK 1. a) , D1 , D2 , ..., Dn , /T , D1’ , D2’ , ..., Dn’ If the mode switch is set to pulse mode, then the output signal will be: D1, D2, ..., Dn, Pause (3.6 s), D1’, D2’ ,..., Dn’ (Pulse) 1. b) 2. (Pulse), (Tone) (Tone), if MODE pin = C2, * is sent out as DTMF tone If the mode switch is set to tone mode, then the output signal will be: D1, D2, ..., Dn, (Tone) 3. (Tone) * , D1’, D2’, ..., Dn’ (Tone) (Tone) The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse mode by going on-hook only. HKS KEY IN tKID 2 */T 3 DP tPDP tIDP MUTE tP MASK MFO OSC Oscillation MFIND 15026 Figure 9. Pulse-to-tone operation 14 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB Flash (F) ÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ Á Á ÁÁ ÁÁÁÁ ÁÁ Á ÁÁÁÁÁÁ ÁÁÁ OFF HOOK , Fn 1. The dialer will execute flash break and the entire flash pause time will elapse before the next digits are dialed out. 2. The flash key can be stored as a digit in the memory. Only one flash, however, will be released to the users. 3. The system will return to the initial state after the flash pause time has elapsed. High HKS KEY IN F F tKID 3 tFB DP tFP tFP MUTE MASK MFO tITP Oscillation OSC 15027 Figure 10. Flash operation tKID tKRD tPDP tIDP tTD = key active in debounce = key release debounce = pre-digit pause = inter-digit pause = DTMF output duration tITP tFB tFP tP = intertone pause = flash break time = flash pause time = pause time KEY IN DP MUTE MASK Low EARTH 15028 Figure 11. Symbolic timing diagram: Earth function Rev. A1, 15-Sep-98 15 (23) Preliminary Information U3762MB Off hook HKS HFI HFO PD 14909 Figure 12. Symbolic timing diagram: HFI, HFO function Off hook On hook HKS DP 165 ms 15029 Figure 13. Symbolic timing diagram: on hook debounce time Absolute Maximum Ratings Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60°C Junction ambient SSO44 SSO44 Symbol IL VL Tj Tamb Tstg Ptot RthJA Value 140 14 125 – 25 to + 75 – 55 to + 150 0.9 70 Unit mA V °C °C °C W K/W ESD withstand voltage 1 kV according to MIL standard 883d method 3015.7 (HBM) 16 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB Electrical Characteristics Speech Circuit Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 Ω / 1 W, Tamb = 25°C, unless otherwise specified, refer to “Basic Test Circuit”. Parameters Line voltage Transmit and sidetone Input resistance Gain Gain change with current Gain deviation Line-loss compensation Max. output voltage at line Noise at line weighted psophometrically Sidetone reduction DTMF amplifier Volume range d < 5% DTMF output level low frequency group Pre-emphasis between high- and low-level frequency group Receiving amplifier Gain Gain change with current Gain deviation Line-loss compensation Receiving noise at earphone weighted psophometrially Gain change when muted Output voltage push-pull Test Conditions / Pin IL = 8 mA IL = 20 mA IL = 73 mA IL = 100 mA Ri IL = 20 mA, S5 = open IL = 20 to 60 mA RAGC = infinite Tamb = –10 to +60°C IL = 20 mA RAGC = 12 kW, IL = 73 mA IL = 20 mA, Vmic = 10 mV, CLIM = 2.2 mF, S1 = open IL > 20 mA, GS = 48dB y 20 mA IL w Single tone, IL 20 mA IL = 20 mA, S5 = closed PPRE = PHLG – PLLG, S5 = closed w IL 20 mA IL = 20 to 60 mA RAGC = infinite Tamb = –10 to +60°C IL = 20 mA IL = 73 mA IL = 73 mA y y IL 20 mA IL 20 mA, Zear = 68 nF, 100 W in series, d ≤ 2% Ear protection differential IL = 40 mA, Vgen = 4 Vrms, Zear = 68 nF + 100 W Supply voltage (for internal use only) Output voltage * IL 20 mA dialing mode Available current for IL 20 mA dialing mode peripherals Distortion at line IL = 20 mA, S5 = open VL = 0.775 Vrms Maximum output voltage IL = 20 mA, swing at line VMIC = 50 mVrms Mute suppression transmit IL = 20 mA with privacy function y y * Symbol VL Min. 3.6 5.9 6.9 Ri Gs DGS 45 46.8 –0.5 DGS –0.5 DGs – 4.8 VLmax Typ. 1.4 3.85 6.55 Max. 4.1 7.2 8.2 Unit V V V V 80 47.8 120 48.8 0.5 kΩ dB dB 0.5 dB –7 dB dBm – 72 dBmp 20 dB –6 1.2 no GSTA 10 VL VL 1.3 –8 –4 dBm dBm PPRE 1 3 dB DGR GR 3 –0.5 5 0.5 dB dB DGR –0.3 0.7 dB DGR – 4.7 –6 – 77.5 –7 – 71 dB dBm GRM VRECO 24 0.8 29 0.9 34 dB Vrms Vear 1.3 1.6 2.5 Vrms VDD IDD 2.0 150 ni 15 6.3 dt VL max GSPRIV 3.4 60 V mA 2 % 4 Vpp dB Output must be limited externally to max. 5.5 V Rev. A1, 15-Sep-98 17 (23) Preliminary Information U3762MB DC Characteristics Dialer VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 0 Parameters Memory rentention current Pre-emphasis DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Key on resistance all other keys Key off resistance Mask sink / drive current Earth sink / drive current Test Conditions / Pins HKS = 1, VDD = 1.0 V Column/Row RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V Symbol IMR d IPL IKD Min. Typ. 1 2 – 30 Max. 0.1 3 – 23 0.5 20 IKS RKON 500 RKOFF IM H/L Ie H/L 100 5 Unit mA dB dB mA mA mA kW kW mA mA 0.5 0.5 AC Characteristics Dialer Parameters Keypad active in debounce mode Key release debounce Pre-digit pause Inter-digit pause ( auto dialing ) Make/break ratio DTMF output duration Inter-tone pause Flash break time, F Flash pause time Pause time On-hook debounce time Test Conditions / Pins MODE pin = R3 (10 pps) MODE pin = C1, C2, C4 (10 pps) MODE pin = R1 (20 pps) MODE pin = R2 10 pps, tIP = tIDP + tPDP 20 pps MODE pin = R1 (20 pps), R3 (10 pps) MODE pin = C1, C2, R4 (10 pps) R2 (20 pps) Auto dialing, MODE = C4 MODE = C3 Auto dialing, MODE = C4 MODE = C3 C4 connected to R3 F Symbol tKID Min. 15 Typ. 20 Max. 25 Unit ms tKRD tPDP tPDP tPDP tPDP tIP tIP M/B 15 37 31 25 41 33.5 40.8:60.2 20 40 33.3 20 16.65 836 512 40:60 39.2:60.8 ms ms ms ms ms ms ms % 35.6:64.4 33:67 31.2:68.8 % 84 84 84 135 95 0.9 3.5 87 87 87 140 98 1 3.6 220 90 90 90 147 101 1.1 3.7 ms ms ms ms ms s s ms tTD tITP tFB tFP tP tohd 810 18 (23) 860 Rev. A1, 15-Sep-98 Preliminary Information U3762MB Parameters Break duration Make duration Break + make duration Test Conditions / Pins MODE pin = R3 MODE pin = C1, C2, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = R3 MODE pin = C1, C2, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = C1, C2, R3, R4 MODE pin = R1, R2 (20 pps) Symbol Min. Typ. Max. Unit tB 57.6 63 60 66.7 30 33.35 40 33.3 20 16.65 100 50 62.4 69 ms ms ms ms ms ms ms ms ms ms tB tM 38 31 tM tP tP 95 41 35 105 Electrical Characteristics Tone Ringer fRCK = 4 kHz, VRING = 20 V, Tamb = 25_C, reference point GND, unless otherwise specified Parameters Supply current, outputs open Switch-on threshold Switch-off threshold Ringing frequency Audio sequence frequency Output voltage swing Turn-off delay Test Conditions / Pins VRIAC = 20 V Symbol IRING Min. 2.1 Typ. Max. 3.8 Unit mA VRIAC, THA = open VRIAC R = 150 kΩ, C = 1 nF VRIAC > VRON VRON VROFF 8 5.0 9 5.6 10 6.5 V V f1H f1L f2 Vout toff 937 752 11.5 21 1010 808 12.5 23 65 1083 868 14.0 Hz Hz Hz Vpp ms VRing = 25 V, Cout = 68 nF See figure 11 100 12459 Volt VRING 0 t VRIAC 0 t OUT Melody t 0 toff Figure 14. Turn-off delay time Rev. A1, 15-Sep-98 19 (23) Preliminary Information 20 (23) Preliminary Information 1n 150k 2.2 m F S1 3.58 MHz CLOCK IN To tester To tester To tester IN IN OUT OUT OUT I/O OUT IN IN IN IN IN IN IN IN S6 MIC2 U3762MB MIC1 25k MFO MICO S5 TIN 220n VL VRING VRIAC RCK OUT THA TEST HFI HFO GND PRIND RDC AGC RECO2 RECO1 C1 C2 C3 C4 R1 R2 R3 R4 MUTE MASK MFIND EARTH CLIM VI RECIN VDD 25k 8.2k XT b a 100n ST S9 VDD 220 m VMIC XT HKS IN S11 KT DP MODE I/O I/O OUT To tester I/O To tester S8 1m 68n 39 12k VRECO 4.7k VGEN 100 mV 330 2.2 m 47n 2.2n 1.5k 600 100 m CL S7 VRIAC a b VRING OUT VL To tester 100 m 620 13V IL VGEN 300 mV / 1 kHz U3762MB Basic Test Circuit 14836 Figure 15. Basic test circuit Rev. A1, 15-Sep-98 U3762MB Equations for Electrical Characteristic Parameters of the Speech Circuit The equations refer to the basic test circuit. If not otherwise specified, the switches in the basic test circuit are inactive. Transmit gain GS + 20 log ǒ Ǔ VL V MIC VMIC = 3 mV/1 kHz, S5 = open Receiving gain GR + 20 log ǒ Ǔ V RECO VL RX-mode: Vgen = 300 mV/1 kHz, S7b Line-loss compensation transmit DGS GS(at IL 73 mA)–GS(at I L + + + 20 mA) TX-mode: VMIC = 3 mV/1 kHz, S5 = open ǒ Ǔ Sidetone reduction GSTA + 20 log VL (in TX–mode) V RECO ) GR TX-mode: VMIC = 3 mV/1 kHz, S5 = open Line-loss compensation receive DGR GR(at I L 73 mA)–GR(at I L + + + 20 mA) RX-mode: Vgen = 300 mV/1 kHz, S7b Gain change when muted GRM + 20 log V RECO (Mute VL + inactive)–20 log V RECO (Mute VL + active) Vgen = 100 mV/1 kHz, S5 = open, S8 = open ǒ Ǔ Input impedance of microphone amplifier 50 k Ri V L (S6 + closed) –1 V L(S6 + open) + TX-mode: VMIC = 3 mV/1 kHz, S5 = open Rev. A1, 15-Sep-98 21 (23) Preliminary Information U3762MB Packaging Information Package SSO44 Dimensions in mm 9.15 8.65 18.05 17.80 7.50 7.30 2.35 0.3 0.25 0.10 0.8 0.25 10.50 10.20 16.8 44 23 technical drawings according to DIN specifications 13040 1 22 22 (23) Rev. A1, 15-Sep-98 Preliminary Information U3762MB Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC Semiconductors GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423 Rev. A1, 15-Sep-98 23 (23) Preliminary Information