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| Features Speech Circuit * * * * Adjustable DC Characteristic Symmetrical Input of Microphone Amplifier Receiving Amplifier for Dynamic or Piezo-electric Earpieces Automatic Line-loss Compensation Dialer * * * * * * * * * * * * * * DTMF/Pulse Switchable Pulse Dialing 66/33 or 60/40 or DTMF Dialing Selectable by Pin Selectable Flashing Duration by Key Pad Pause Function Optical Indication of Temporary DTMF Mode Keytone for Pulse Dialing Last Number Redial up to 32 Digits Three by 17 Digits Direct (One-touch) Memory Ten by 17 Digits Indirect (Two-touch) Memory Notice Function up to 32 Digits Standard Low-cost Crystal 3.58 MHz or Ceramic Resonator Handset Mute (Privacy) with Optical Indication Additional Toggle Flipflop Internal Loop Interrupt Detection Universal Telephone IC All Functions Integrated U3761MB-T Tone Ringer * * * * 2-tone Ringer Adjustable Volume RC Oscillator Adjustable Threshold Benefits * Low Number of External Components * High Quality through One IC Solution Electrostatic sensitive device. Observe precautions for handling. Description Atmel's low-voltage telephone circuit U3761MB-T performs all the speech and line interface functions required in an electronic telephone set, a tone ringer, a pulse and DTMF dialing with redial, notice function, and 13 memories. Operation below 15 mA is possible with reduced performance. Rev. 4744A-CORD-09/03 Figure 1. Block Diagram 2 Tip VI 100 kW HKS 1a 470 W 3 kW 33 kW 18 kW 220 nF 2N5401 CL 2.2 nF XT MIC2 2.2 F HKS MODE PRIND Mask DP VDD MFO MIC1 MICO TIN 13 V/ 1W Ring 220 nF 75 V HKS 1b 5 MW 220 kW 1 F 1 kW 220 F LED 4.7 V Next to VDD and GND MPSA42 470 nF 4.7 V Important note: Application examples have not been examined for series use or reliability, and no worst case scenarios have been developed. Customers who adapt any of these proposals must carry out their own testing and be convinced that no negative consequences arise from the proposals. U3761MB-T to key board matrix Transmit amplifier CLIM VL 330 W 2.4 kW 680 W 3.58 MHz XT Clock generator + Microphone amplifier Control function Sidetone amplifier ST Earth KT Mute control 3.3 nF C1 C2 Pulse control logic 47 nF RECIN 2.2 F C3 Receiver attenuation C4 Read - write counter Control logic Supply current regulator R1 1 2 3 S M1 R2 Control function Receiving amplifier RECO1 1.8 kW 100 W RECO2 12 kW AGC RDC VI 300 W 39 W 1W 100 F 4 5 6 M2 R3 Keyboard interface RAM 7 8 9 A M3 R4 */T 0 # R/P N F1 F2 F3 E Location latch Data latch & decoder D/A converter ROW & column programmable counter AGC current generator VI MFIND MUTE VRING 10 F TEST Supply Power on reset 10 kW OUT 1 nF RCK Clock signal oscillator Divider Tone signal generator VRIAC 10 kW 150 kW HFI HFO Toggle flipflop Divider Bandgap reference Comparator with hysteresis THA 4744A-CORD-09/03 U3761MB-T Pin Configuration Figure 2. Pinning SSO44 C1 C2 C3 C4 Earth HFI HFO XT XT 1 2 3 4 5 6 7 8 44 43 42 41 40 39 38 37 R4 R3 R2 R1 Mask DP MODE KT HKS NC TEST VDD OUT RCK VRING VRIAC AGC THA ST CLIM RECO 1 RECO 2 U3761MB-T 9 36 35 34 33 32 31 30 29 28 27 26 25 24 23 MFO 10 MFIND 11 GND 12 MIC 1 13 MIC 2 14 MICO 15 VL 16 RDC 17 TIN 18 VI 19 MUTE 20 PRIND 21 RECIN 22 3 4744A-CORD-09/03 Pin Description Pin 1 2 3 Symbol Function C1 C2 C3 C1 VDD VDD Configuration Keyboard input VDD PD 4 C4 C2-C4 VDD PD = Protection Device VDD 5 Earth Earth key (604 ms high pulse, 1 s pause) EARTH PD VDD 6 HFI VDD PD VDD 7 HFO Output will be toggled by each LOW/HIGH edge at HFI HFO PD 4 U3761MB-T 4744A-CORD-09/03 200K Toggle flipflop input Input with 200 kW pull-down resistor HFI triggers HFO with each LOW/HIGH edge HFI U3761MB-T Pin Description Pin Symbol Function Configuration VDD XT VDD 8 9 XT XT A built-in inverter provides oscillation with an inexpensive 3.579545-MHz crystal or ceramic resonator VDD PD XT VDD PD 10 MFO Output of DTMF DTMF output frequency Specified (Hz) Actual (Hz) Error (%) R1 697 699 +0.28 766 -0.52 R2 770 R3 852 848 -0.47 940 -0.10 R4 941 1216 +0.57 C1 1209 C2 1336 1332 -0.30 1472 -0.34 C3 1477 VDD MFO VDD PD VDD 11 MFIND During the temporary DTMF mode the output switches to low Reset by on hook condition Maximum voltage at MFIND = 5.5 V MFIND MFIND PD 12 GND Ground VI 1V 50K PD 13 14 MIC 1 MIC 2 Inverting input of microphone amplifier Non-inverting input of microphone amplifier MIC1 MIC2 50K 1V VI PD 5 4744A-CORD-09/03 Pin Description Pin Symbol Function Configuration VI 15 MICO Transmit pre-amp output which is normally capacitively coupled to Pin TIN 1V MICO 16K PD VL 16 V 16 VL Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal. PD RDC PD 17 RDC 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 1V 18 TIN Input to the line output driver amplifier. Transmit AGC applied to this stage. 5.6K TIN 16 V PD 19 VI 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 W for an 600-W input impedance or 1.2 kW for a 900-W input impedance. VI 16 V PD 6 U3761MB-T 4744A-CORD-09/03 U3761MB-T Pin Description Pin Symbol Function Configuration 20 MUTE Pin for testing Forcing MUTE to GND mutes the microphone and decreases the earpiece signal by typically 29 dB; no pull up circuit allowed 30K VBG MUTE MUTE 6.7 V PD 21 PRIND PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active PRIND 6.7V PD VL 22 RECIN Receive amplifier input. The receiving amplification is regulated by an AGC. RECIN 60K VL 23 24 RECO2 RECO1 Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 W can be directly driven by these outputs. RECO2 RECO1 6.7 V PD 60K 1V VL 25 CLIM Time constant of anticlipping in transmit path. CLIM 2.2 F CLIM = GND: anticlipping inactive CLIM IDC 6V PD 26 ST The output of the sidetone cancellation signal, which requires a balanced impedance of 8 to 10 times the subscriber's line impedance to be connected to pin VL. ST 16 V PD 7 4744A-CORD-09/03 Pin Description Pin Symbol Function Configuration VRIAC 140K 1V 20K 27 THA Ringer threshold adjustment THA PD 6V 6V 12K VL 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. AGC PD RDC PD 29 VRIAC Ringing supply VRIAC 50 V PD 70K 10K VRING 30 VRING DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode. OUT 30 V PD 6.5K 200 50 V PD 3.4 V 31 RCK RC clock oscillator for ringer RCK PD 6V 6V 0.8 V 8 U3761MB-T 4744A-CORD-09/03 U3761MB-T Pin Description Pin Symbol Function Configuration VRING 32 OUT Buzzer output OUT 30 V PD 6.5K 200 50 V PD VL 33 VDD Supply output for dialer part VDD 6V PD 6V VDD 6.25 k VDD 34 Test Test input with 6.25 kW pull-up resistor TEST VDD PD 35 NC Not connected 36 HKS Hook switch input HKS = 0: On-hook state. Chip in sleep mode, no operation (external pull-down resistor recommended) HKS = 1: Off-hook state. Chip enable for normal operation IHKS 0.5 mA VDD HKS PD VDD 37 KT Keytone output signal which is sent out in pulse dialing mode with a keytone frequency of 582 Hz. KT sink/drive current is about 100 A at VDD = 2.5 V KT VDD PD 9 4744A-CORD-09/03 Pin Description Pin Symbol 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 Configuration VDD 38 MODE MODE VDD PD VDD 39 DP 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 DP PD VDD 40 Mask Short mute during pulse dialing, active high During MASK an internal NPN transistor shortens VL against VI. MASK PD 41 42 43 R1 R2 R3 R1 VDD VDD Keyboard input 44 R4 R2-R4 PD VDD VDD PD 10 U3761MB-T 4744A-CORD-09/03 U3761MB-T Keyboard Operation C1 1 4 7 */T C2 2 5 8 0 F2 C3 3 6 9 # F3 A R/P E C4 S M1 M2 M3 N R1 R2 R3 R4 ^ F1 ^ * * * * * * * S: Store function key A: Indirect repertory dialing function key (LN 0 to 9) R/P: Redial and pause function key N: Notice function */T: * function; pulse-to-tone function M1 to M3: One-touch memory F1, F2, F3: Flash keys , D1 D2 , ..., Dn Normal Dialing OFF HOOK 1. D1, D2, ..., Dn will be dialed out. 2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits. 3. If redialing length oversteps 32 digits, the redialing function will be inhibited. Redialing OFF HOOK HOOK , R/P , D1 , D2 , ..., Dn BUSY, Come ON HOOK ,OFF 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, A, M1, M2, M3, N, * (only tone mode) Characters F1, F2, F3, Earth, (* in pulse mode) can only be stored in Mn, Ln and N memory. Characters F1, F2, F3, Earth, (* in pulse mode) will not be dialled out from redial memory; dialling out was stopped, when recognizing one of the above characters. Example: OFF/ HOOK, D1, D2, F1, D4, D5, S, S, M1 a) ON/OFF-HOOK, R/P b) ON/OFF-HOOK, M1 only D1, D2 will be dialed out, then dialing out stops D1, D2, F1, D4, D5 will be dialed out Content of redial memory can be copied to Mn, Ln, N; but copying memory Mn, Ln, N to itself or to another memory (except redial memory) will erase the destinated memory. 11 4744A-CORD-09/03 Example: OFF/ HOOK, D1, D2, ... Dn a) ON/OFF-HOOK, R/P, N. D1, ... Dn copied to N b) ON/OFF-HOOK, R/P, S, S, Mn (or Ln) D1, ... Dn copied to Mn (or Ln) but OFF/ HOOK, M1 a) ON/OFF-HOOK, R/P, S, S, M2 b) ON/OFF-HOOK, M1, S, S, M2 content of M1 will be dialed out not possible, M2 will be erased not possible, M2 will be erased Number Store OFF HOOK , D1 , D2 , ..., Dn , S , S , Mn (or Ln) 1. D1, D2, ..., Dn will be stored in memory location only (not in redial memory) and dialed out. OFF HOOK S , D1 , D2 , ..., Dn , S , Mn (or Ln) 2. D1, D2, ..., Dn will be stored in memory location but will not be dialed out. 3. R/P and */T keys can be stored as a digit in memory, also F1, F2, F3, Earth. In store mode, R/P is the pause function key; */T is the pulse-to-tone function key. 4. The store mode is released after the store function is executed or when the state of the hook switch is changed. 5. Number store can be linked without going ON/OFF-Hook Example: OFF/HOOK S, D1, D2, ... Dn, S, M1 S, D1', D2', ... Dn', S, M2 ... storing D1, D2, ... Dn to M1 storing D1', D2', ... Dn' to M2 Repertory Dialing 1. OFF HOOK 2. OFF HOOK , , , Mn A , D2 Ln , ..., Dn , N Notice (N) OFF HOOK D1 1. If the dialing of D1 to Dn is finished, pressing the N key will cause D1 to Dn to be copied to the N memory. 2. Pressing key N again, after D1, D2, ... Dn was copied to N, N will be dialed out again OFF HOOK , N 3. D1 to Dn will be dialed out after the N key is pressed. 4. Notice function is valid as first key only. Cascaded Dialing 1. Normal dialing + Repertory dialing + Normal dialing 2. Repertory dialing + Normal dialing + Normal dialing 3. Redialing + Normal dialing + Repertory dialing 4. Redialing is valid as first key-in only. 12 U3761MB-T 4744A-CORD-09/03 U3761MB-T Figure 3. Pulse Mode Normal Dialing HKS tKRD KEY IN 3 tKID DP tIDP MUTE BM 4 2 2 tKID tPDP tIDP BM tIDP tPDP tIDP MASK MFO Low OSC Oscillation Figure 4. Pulse Mode Auto Dialing, t < tOHD HKS tKRD KEY IN R/P tKID DP BM t < tOHD tPDP MUTE tIDP BM tIDP tIDP MASK MFO Low OSC Oscillation 13 4744A-CORD-09/03 Figure 5. Pulse Mode Auto Dialing, t > tOHD HKS tKRD KEY IN R/P tKID DP BM t > t OHD tPDP MUTE tIDP BM tIDP MASK MFO Low OSC Oscillation Figure 6. DTMF Mode Normal Dialing HKS tKRD KEY IN 3 tKID DTMF MUTE tTD tITP tITP tITP 4 2 5 MASK DP Low High OSC Oscillation 14 U3761MB-T 4744A-CORD-09/03 U3761MB-T Figure 7. DTMF Mode Auto Dialing (t < tOHD) HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP tITP t < tOHD MASK DP Low High OSC Oscillation Figure 8. DTMF Mode Auto Dialing (t > tOHD) HKS tKRD KEY IN R/P tKID DTMF MUTE tTD tITP t > t OHD MASK DP Low High OSC Oscillation Access Pause OFF HOOK , D1 , D2 , R/P , D3 , ..., Dn' 1. The pause function can be stored in the memory. 2. The pause function is executed in normal dialing and redialing. 15 4744A-CORD-09/03 Figure 9. Pause Function HKS KEY IN tKID DP 2 R/P 3 tIDP tPDP MUTE tP MASK tPDP MFO Low OSC Oscillation Pulse-to-tone (*/T) OFF HOOK , D1 , D2 , ..., Dn , */T , D1' , D2' , ..., Dn' 1. 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) D1, D2, ..., Dn, (Tone) * (Tone) , D1', D2', ..., Dn' (Tone) 2. If the mode switch is set to tone mode, then the output signal will be: (Tone) 3. 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. 4. ON/OFF-HOOK, R/P D1, D2, Dn dialed out, then further dialing out stops and remains in pulse mode, when dialling from redial memory. 5. If characters are stored in Mn, Ln or N, dialing out will be the same in pulse mode as point 1. 16 U3761MB-T 4744A-CORD-09/03 U3761MB-T Figure 10. Pulse-to-tone Operation HKS KEY IN tKID DP tPDP MUTE 2 */T 3 tIDP tP MASK MFO OSC MFIND Oscillation Flash (F1 or F2 or F3) OFF HOOK , Fn 1. The dialer will execute a 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. 17 4744A-CORD-09/03 Figure 11. Flash Operation HKS KEY IN High F t KID F t FB 3 DP t FP MUTE t FP MASK MFO t ITP Oscillation OSC tKID = key active in debounce tKRD = key release debounce tPDP = pre-digit pause tIDP = inter-digit pause tTD = DTMF output duration tITP = intertone pause tFB = flash break time tFP = flash pause time tP = pause time Figure 12. Symbolic Timing Diagram: Earth Function KEY IN DP MUTE Low MASK EARTH 18 U3761MB-T 4744A-CORD-09/03 U3761MB-T Figure 13. Symbolic Timing Diagram: HFI, HFO Function HFI HFO Figure 14. Symbolic Timing Diagram: On Hook Debounce Time Off hook HKS On hook XT 165 ms Figure 15. HKS Threshold Voltage 60 HKS Threshold (% of VDD ) 55 50 switch on 45 40 35 switch off 30 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VDD (V) 19 4744A-CORD-09/03 Absolute Maximum Ratings Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Symbol Value Unit Line current DC line voltage DC voltage at pins 1 to 11 and 33 to 44 Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60C, SSO44 Junction ambient, SSO44 Note: IL VL VDC Tj Tamb Tstg Ptot RthJA 140 14 5.5 125 -25 to +75 -55 to +150 0.9 70 mA V V C C C W K/W ESD withstand voltage 1 kV according to ESD standard S5.1 (HBM) Electrical Characteristics: Speech Circuit Reference point pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 W/1 W, Tamb = 25C, unless otherwise specified, refer to "Basic Test Circuit". CLIM = GND Parameters Test Conditions Symbol Min. Typ. Max. Unit Line voltage 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 +60C, IL = 20 mA RAGC = 12 kW, IL = 73 mA IL = 20 mA, S5 = open IL = 20 mA, Vmic = 10 mV, CLIM = 2.2 F, S1 = open CLIM = 2.2 F IL > 20 mA, GS = 48 dB IL 20 mA Single tone, IL 20 mA IL = 20 mA, S5 = closed Tamb = -5C to +60C PPRE = PHLG - PLLG, S5 = closed, Tamb = -5C to +60C IL 20 mA, measured at pin MFO VL 3.6 5.9 6.9 45 46.8 -0.5 -0.5 -7 1.4 3.85 6.55 4.1 7.2 8.2 120 48.8 0.5 0.5 V V V V kW dB dB dB dB % dBm ms Transmit and Sidetone Input resistance Gain Gain change with current Gain deviation Line-loss compensation Distortion at line VL = 0.775 Vrms Maximum output voltage at line d 5% Attack time transmit anticlipping Noise at line weighted psophometrically Sidetone reduction DTMF Amplifier Ri Gs DGS DGS DGs 80 47.8 -6 -4.8 2 dt VLmax tatt no GSTA VL VL PPRE THD 10 1.3 -7.6 1.9 2.5 15 1.2 3.5 -72 20 dBmp dB dBm Volume range d < 5% DTMF output level low frequency group Pre-emphasis between high- and low-level frequency group Total harmonic distortion relative to sum level of low and high frequency group signal -4.6 3.1 dBm dB -33 -25 dBr 20 U3761MB-T 4744A-CORD-09/03 U3761MB-T Electrical Characteristics: Speech Circuit (Continued) Reference point pin GND, f = 1000 Hz, 0 dBm = 775 mVrms, RDC = 39 W/1 W, Tamb = 25C, unless otherwise specified, refer to "Basic Test Circuit". CLIM = GND Parameters Receiving Amplifier Test Conditions Symbol Min. Typ. Max. Unit Gain Gain change with current Gain deviation Line-loss compensation Receiving noise at earphone weighted psophometrially Gain change when muted Output voltage push-pull Ear protection differential IL 20 mA IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA IL = 73 mA IL = 73 mA IL 20 mA IL 20 mA, Zear = 68 nF, 100 W in series, d 2% IL = 40 mA, Vgen = 4 Vrms, Zear = 68 nF + 100 W GR DGR DGR 3 -0.5 -0.3 -7 -6 -77.5 24 0.8 1.3 29 0.9 1.6 5 0.5 0.7 -4.7 -71 34 dB dB dB dB dBm dB Vrms DGR ni GRM VRECO Vear 2.5 Vrms Supply Voltage (For Internal Use Only) Output voltage Note: Output must be limited externally to 5.5 V maximum Available current for peripherals Transmit Maximum output voltage swing at line Mute suppression transmit with privacy function IL 20 mA dialing mode IL 20 mA dialing mode VDD IDD 2.0 150 6.3 V A IL = 20 mA, VMIC = 50 mVrms IL = 20 mA VL max GSPRIV 60 3.4 4 Vpp dB DC Characteristics Dialer VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1 Parameters Test Conditions Symbol Min. Typ. Max. Unit Memory retention current Data retention voltage DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Key on resistance Key off resistance Mask sink/drive current Earth sink/drive current HKS = 0, VDD = 1.0 V RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V IMR 0.5 d IPL IKD IKS RKON RKOFF IM H/L Ie H/L 100 0.5 0.5 0.5 20 500 -30 0.1 -23 A V dB mA A A 5 kW kW mA mA 21 4744A-CORD-09/03 DC Characteristics Dialer (Continued) VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1 Parameters Test Conditions Symbol Min. Typ. Max. Unit Isolation resistance XT/XT Maximum voltage at HKS Maximum input current at HKS Riso 4.7 5.5 0.5 MW V mA AC Characteristics Dialer VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1 Parameters Test Conditions Symbol Min. Typ. Max. Unit Keypad active in debounce mode Key release debounce MODE pin = R3 (10 pps) MODE pin = C1, 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, R4 (10 pps) R2 (20 pps) Auto dialing, MODE = C4 MODE = C3 Auto dialing, MODE = C4 MODE = C3 C1 connected to GND C2 connected to GND C3 connected to GND 20 to 70% of VDD F1, F2, F3 tKID tKRD tPDP tPDP tPDP tPDP tIP tIP M/B 15 15 37 31 20 20 40 33.3 20 16.65 25 25 41 33.5 ms ms ms ms ms ms Pre-digit pause Inter-digit pause (auto dialing) 810 40.8:60.2 35.6:64.4 836 512 40:60 33:67 87 87 87 140 98 250 604 1 3.6 165 604 1 60 66.7 30 33.35 860 39.2:60.8 31.2:68.8 90 90 90 147 101 255 610 10 1.1 3.7 185 1.1 62.4 69 ms ms % % ms ms Make/break ratio DTMF output duration Inter-tone pause Flash break time F1 F2 F3 Rise time of leading edge at HKS Flash pause time Pause time On-hook debounce time Earth time Earth pause time tTD tITP 84 84 84 135 95 245 590 0.9 3.5 145 0.9 57.6 63 tFB trHKS tFP tP tohd ms ms ms ms s s ms ms s ms ms ms ms C4 connected to GND MODE pin = R3 MODE pin = C1, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = R3 MODE pin = C1, R4 MODE pin = R1 (20 pps) MODE pin = R2 MODE pin = C1, R3, R4 MODE pin = R1, R2 (20 pps) tet tpt tB tB tM tM tP tP Break duration Make duration 38 31 40 33.3 20 16.65 100 50 41 35 ms ms ms ms ms ms Break + make duration 95 105 22 U3761MB-T 4744A-CORD-09/03 U3761MB-T Electrical Characteristics Tone Ringer fRCK = 4 kHz, VRING = 20 V, Tamb = 25C, reference point GND, unless otherwise specified Parameters Test Conditions Symbol Min. Typ. Max. Unit Supply current, outputs open Switch-on threshold Switch-off threshold Ringing frequency Range of external components for R/C oscillator Audio sequence frequency Output voltage swing Turn-off delay Note: VRIAC = 20 V VRIAC, THA = open VRIAC R = 150 kW, C = 1 nF VRIAC > VRON IRING VRON VROFF f1H f1L C R f2 2.1 8 5.0 937 752 1000 50 11.5 21 12.5 23 65 9 5.6 1010 808 3.8 10 6.5 1083 868 2200 330 14.0 100 mA V V Hz Hz pF kW Hz Vpp ms VRing = 25 V, Cout = 68 nF See Figure 15 Vout toff Max. current into internal zener diode at pin VRING = 20 mA Figure 16. Turn-off Delay Time Volt VRING 0 t VRIAC 0 t OUT Melody t 0 toff Note The oscillator frequency is defined by R and C at pin RCK. 1 f Osc -----------------------------------------------------------------1.594 C [ R + 3809 W ] The audio sequence frequency f2 and the ratio of low frequency f1L and high frequency f1H are derived from the oscillator by internal deviders. So f2, f1H and f1L are given by: f Osc f Osc f Osc f 2 = --------- ; f 1H = --------- ; f 1L = --------320 4 5 For more information on adjusting ringer melody refer to the document "Application and Adjustment Hints". 23 4744A-CORD-09/03 OUT I/O VMIC VGEN 100 mV CL 100 1 25k 600 S5 220n S8 S6 b 25k VDD 8.2k a S9 220 1 S7 VGEN 300 mV/1 kHz I/O Figure 17. Basic Test Circuit To tester To tester To tester 24 To tester To tester ab IL KT DP VDD VL 13 V 4.7k S11 XT ST 47n RECIN VI IN IN IN IN IN IN IN IN I/O OUT OUT OUT I/O IN U3761MB-T MIC1 MIC2 MFO MICO TIN 1.5k VL MODE HKS 2.2n 620 XT RECO1 VRECO RECO2 330 AGC RDC PRIND VRING VRIAC OUT THA 39 OUT CLOCK IN 3.58 MHz 100 2.2 C1 C2 C3 C4 U3761MB R1 R2 R3 R4 12k S1 MUTE MASK MFIND EARTH CLIM RCK To tester 2.2 IN IN OUT 150k TEST HFI HFO GND VRIAC 68n VRING 1n 4744A-CORD-09/03 U3761MB-T 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 VL GS = 20 log ae ------------o e V MICo VMIC = 3 mV/1 kHz, S5 = open Line-loss Compensation Transmit DGS = GS (at IL = 73 mA) - GS (at IL = 20 mA) TX-mode: VMIC = 3 mV/1 kHz, S5 = open Line-loss Compensation Receive DGR = GR (at IL = 73 mA) - GR (at IL = 20 mA) RX-mode: Vgen = 300 mV/1 kHz, S7b Receiving Gain VRECO GR = 20 log ae ---------------- o e VL o RX-mode: Vgen = 300 mV/1 kHz, S7b Sidetone Reduction VL GSTA = 20 log ae ---------------- o (in TX-mode) + GR e V RECOo TX-mode: VMIC = 3 mV/1 kHz, S5 = open Input Impedance of Microphone Amplifier 50 k Ri = -----------------------------------------------ae V L(S6 = closed) - 1o --------------------------------eV o L(S6 = open) TX-mode: VMIC = 3 mV/1 kHz, S5 = open Gain Change when Muted V RECO VRECO GRM = 20 log ae ---------------- o (Mute = inactive) - 20 log ae ---------------- o (Mute = active) e VL o e VL o Vgen = 100 mV/1 kHz, S5 = open, S8 = open Total Harmonic Distortion (THD) ae n U 2 + n U 2 + n U 2 + n U 2 + ...n U 2 + n U 2o 1 LG 1 HG 2 LG 2 HG n LG n HG THD = 20 log c -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------/ c / 2 2 ULG + UHG e o n1, ... nn = harmonics of high and low frequency group 25 4744A-CORD-09/03 Ordering Information Extended Type Number Package Remarks U3761MB-TFN U3761MB-TFNG3 SSO44 SSO44 Tube Taped and reeled Package Information Package SSO44 Dimensions in mm 18.05 17.80 9.15 8.65 7.50 7.30 2.35 0.3 0.8 16.8 44 23 0.25 0.10 0.25 10.50 10.20 technical drawings according to DIN specifications 1 22 26 U3761MB-T 4744A-CORD-09/03 Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131, USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 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 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 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 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 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France Tel: (33) 4-76-58-30-00 Fax: (33) 4-76-58-34-80 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France Tel: (33) 4-42-53-60-00 Fax: (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906, USA Tel: 1(719) 576-3300 Fax: 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland Tel: (44) 1355-803-000 Fax: (44) 1355-242-743 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 Literature Requests www.atmel.com/literature Disclaimer: Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. (c) Atmel Corporation 2003. All rights reserved. Atmel (R) and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be the trademarks of others. Printed on recycled paper. 4744A-CORD-09/03 |
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