U3761MB Low Voltage Standard Telephone Circuit with 13 Memories Description TEMIC’s low voltage telephone circuit, U3761MB performs all the speech and line interface functions required in an electronic telephone set, the tone ringer, the pulse and DTMF dialing with redial, notice function, and 13 memories. Features Speech Circuit D Last number redial up to 32 digits D Adjustable DC characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or D Three by 32 digits direct (one touch) memory piezo-electric earpieces D Automatic line loss compensation Dialer D DTMF / pulse switchable D Pulse dialling 66/33 or 60/40 or DTMF dialling selectable by pin D Selectable flashing duration by key pad D Pause function D Ten by 16 digits indirect (two touch) memory D Notice function up to 32 digits D Standard low-cost crystal 3.57 MHz or ceramic resonator Tone Ringer D 2 Tone ringer D Adjustable volume D RC oscillator D Adjustable threshold Benefits D Low number of external components D High quality through one IC solution TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 1 (23) Preliminary Information 5 6 8 9 A M3 4 7 R3 R2 R1 2 (23) Preliminary Information RCK GND 150 k 1n MUTE 47 n PRIVACY */T 0 # R/P N R4 F1 F2 F3 E M2 2 3 S M1 1 C4 C3 C2 C1 i n t e r f a c e K e y b o a r d Location latch RAM Data latch & decoder l o g i c Divider Divider Supply ROW & column programmable counter Pulse control logic BM Mask DP C o n t r o l Clock signal oscillator Read – write counter Clock generator MODE 22 k D/A converter MIC2 MICO 100 n Bandgap reference Tone signal generator Power-on-reset Supply current regulator Comparator with hysteresis Control function 33 k CL 220 k ST 2.4 k VL HKS 12630 Receiving amplifier VI THA OUT VRIAC VRING 10 k 100 47 n VBG 1 W RDC 39 680 HKS 3n3 AGC 12 k RECO2 RECO1 2.2 m Receiver attenuation RECIN Sidetone amplifier 2n2 2N5401 Transmit amplifier 3k Control function TIN MPSA42 220 n AGC current generator Microphone – amplifier + MIC1 Mute control VDD1 MFO 220 m 18 k 220 k 1m 10 k 28 V 10 m 100 m 390 1.8 k EP 330 13 V 1W 470 Earth XT HKS 5V1 Á 470 k BC546 1M 5M Ring 75V Tip Block Diagram / Applications ÁÁ ÁÁ XT 3.58 MHz 220 k U3761MB VDD Figure 1. TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB SDIP40 SSO44 C1 1 40 R4 C1 1 44 R4 C2 2 39 R3 C2 2 43 R3 C3 3 38 R2 C3 3 42 R2 C4 4 37 R1 C4 4 41 R1 Earth 5 36 Mask Earth 5 40 Mask XT 6 35 NC 6 39 DP DP 7 NC 7 34 38 XT MODE MODE XT 8 37 BM MFO 8 33 BM XT 9 36 HKS GND 9 32 HKS MFO 10 35 NC NC 11 34 NC GND 12 33 VDD MIC 1 13 32 OUT MIC 2 14 31 RCK MICO 15 30 VRING VL 16 29 VRIAC 31 VDD MIC 1 10 MIC 2 11 30 U3761MB MICO 12 29 VL 13 28 RDC 14 RCK VRING 27 VRIAC NC 15 26 AGC TIN 16 25 THA 24 ST VI 17 23 PRIVACY MUTE 18 U3761MB OUT 28 RDC 17 AGC 27 THA TIN 18 26 ST VI 19 VBG 19 22 RECO 1 MUTE 20 25 PRIVACY RECIN 20 21 RECO 2 VBG 21 24 RECO 1 23 RECO 2 12631 RECIN 22 12632 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 3 (23) Preliminary Information U3761MB Pin Description SDIP40 SSO44 Symbol 1 1 C1 Configuration Function Keyboard input C1 2 2 C2 PD 3 3 C3 C2–C4 4 4 C4 5 5 Earth 15 7, 6, 34, 35 NC 6 8 XT PD Earth key Not connected A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator XT PD XT 40P 40P 40P 40P PD 7 9 XT XT PD XT PD 8 10 MFO Output of DTMF MFO 9 12 GND DTMF output frequency Specified Actual (HZ) (Hz) R1 697 699 R2 770 766 R3 852 848 R4 941 948 C1 1209 1216 C2 1336 1332 C3 1477 1472 Error (%) +0.28 –0.52 –0.47 +0.74 +0.57 –0.30 –0.34 Ground 4 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB SDIP40 10 SSO44 13 Symbol MIC 1 Configuration Function Inverting input of microphone amplifier Ê VI 1V 50K PD MIC1 ÊÊ Ê Ê Ê MIC2 50K 1V VI 11 14 MIC 2 PD Non-inverting input of microphone amplifier VI 1V 50K PD MIC1 MIC2 ÊÊ Ê Ê Ê Ê Ê 50K 1V VI PD 12 15 VI MICO 1V Transmit pre-amp output which is normally capacitively coupled to Pin TIN 16K MICO PD 13 16 VL Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal. VL PD 16V RDC PD TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 5 (23) Preliminary Information U3761MB SDIP40 14 SSO44 17 Symbol RDC Configuration Ê Ê VL AGC PD RDC 16 18 PD 5.6K TIN 16V PD 17 19 ÊÊ ÊÊ ÊÊ Ê 1V TIN VI VI 16V PD 18 20 MUTE Ê Ê Ê Ê Ê Ê Ê Ê ÊÊ Ê Ê Ê ÊÊ VBG 30K MUTE Function 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. Input to the line output driver amplifier. Transmit AGC applied to this stage. This internal voltage bias line must be connected to VL via an external resistor, RB, 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. Pin for testing MUTE PD 19 21 6.7V VL VBG VBG 6.7V PD 20 22 RECIN 60K REC IN 22 24 VL RECO1 60K RECO2 RECO1 1V Pin for test mode 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 PD 21 23 VL RECO2 60K RECO2 RECO1 1V 6.7V PD 6 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB SDIP40 23 SSO44 25 Symbol PRIVACY Configuration Ê Ê Ê Ê PRIVACY 40K 6V 0.6V 6V PD 24 26 Function Input for handset mute VI ST ST 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. 16V PD 25 27 Ê VRIAC THA THA 20K 6V 6V PD 26 28 ÊÊ Ê ÊÊ 140K 12K 1V VL AGC AGC PD RDC 27 29 VRIAC 70K 10K 50V PD 30 Ê Ê VRING VRING 30V 6.5K PD OUT 50V PD 29 31 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. PD VRIAC 28 Ringer threshold adjustment 200 ÊÊÊÊ Ê 3.4V RCK Ringing supply DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode. RC clock oscillator for ringer 0.8V RCK 6V 6V PD TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 7 (23) Preliminary Information U3761MB SDIP40 30 SSO44 32 Symbol OUT Configuration Function Buzzer output VRING PD 30V 200 6.5K OUT 50V PD 31 33 Ê Ê VL VDD 6V VDD 6V Supply output for dialer part PD 32 36 HKS Hook switch input. HKS = 1: On-hook state. Chip in sleep mode, no operation. HKS = 0: Off-hook state. Chip enable for normal operation with a pull-high resistor of about 4 MW. HKS PD 33 37 BM If BM = floating pulse dialing with 3:2 B/M ratio If BM is connected to ground pulse dialing with a B/M ratio of 2:1 B/M PD 34 38 MODE Pulling mode pin to VDD places the dialer in tone mode. Pulling mode pin to GND places the dialer in DTMF with 140 ms inter-tone pause. If the mode pin is left floating, the dialer is in pulse mode ( 10 ppS) MODE 35 39 DP DP 36 40 Mask DP N-channel open drain pulse dialing output. Flash key will cause DP to be active in either DTMF mode or pulse mode. Short mute during pulse dialing 8 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB SDIP40 37 SSO44 41 Symbol R1 Configuration Function Keyboard input R1 PD 38 42 R2 R2 PD 39 43 R3 R3 PD 40 44 R4 R4 PD Keyboard Operation ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ : ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ D : : VDD D D D D C1 1 4 7 /T C2 2 5 8 0 C3 3 6 9 # A R/P F1 F2 F3 E S: Store function key A: Indirect repertory dialing function key (LN 0 to 9) R/P: Redial and pause function key C4 S D D /T: M1 M2 M3 N R1 R2 R3 R4 and pulse-to-tone key M1 to M3: One-touch memory F1, F2, F3: Flash keys N: Notice function Normal Dialing ÁÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁ Á ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 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. TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 9 (23) Preliminary Information U3761MB Number Store ÁÁ Á ÁÁÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ Á Á ÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁ ÁÁÁ OFF HOOK , D1 , D2 , ..., Dn , S , S , Mn 1. If the sequence of the dialed digits D1, D2, ..., Dn has not finished 2. D1, D2, ..., Dn will be stored in memory location and dialed out. OFF HOOK 3. , S , D1 , D2 , ..., Dn , S , (or S Mn Ln ) will be ignored. (or Ln ) D1, D2, ..., Dn will be stored in memory location but will not be dialed out. R/P and 4. :/T R/P is the pause function key; In store mode, 5. keys can be stored as a digit in memory. :/T is the pulse-to-tone function key. The store mode is released after the store function is executed or when the state of the hook switch is changed. Reportery Dialing ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁÁÁ ÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ Á ÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁÁ Á ÁÁ ÁÁ ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ Notice (N) ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ Á ÁÁ Á ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁ Á Cascaded Dialing ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ Á ÁÁ Á ÁÁÁÁÁ Á Á ÁÁÁÁÁ Á Á ÁÁÁÁ Á Á ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁ Á ÁÁÁÁ Á Á ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁ 1. OFF HOOK , Mn 2. OFF HOOK , A OFF HOOK , D1 , If the dialing of D1 to the N memory. 1. OFF HOOK 2. , , Ln D2 , ..., to Dn , N Dn is finished, pressing the N key will cause D1 to Dn to be copied N D1 to Dn will be dialed out after the N key is pressed. 1. Normal dialing + Repertory dialing + 2. Repertory dialing + + Normal dialing Normal dialing + 3. Redialing 4. Redialing is valid as first key-in only. Normal dialing Normal dialing + Repertory dialing 10 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB HKS tKRD KEY IN 3 4 2 2 tKID tKID DP MB tIDP tIDP tPDP MB tIDP tPDP tIDP T/P MUTE MASK Low DTMF Oscillation OSC Oscillation 13402 Figure 2. Pulse mode normal dialing HKS tKRD KEY IN t<tOHD R/P tK10 DP MB tPDP tIDP MB tIDP tIDP T/P MUTE MASK DTMF OSC Low Oscillation 13403 Figure 3. Pulse mode auto dialing TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 11 (23) Preliminary Information U3761MB HKS t tOHD tKRD KEY IN R/P tK10 DP MB tIDP tPDP MB tIDP T/P MUTE MASK Low DTMF Oscillation OSC 13404 Figure 4. Pulse mode auto dialing HKS tKRD KEY IN 3 4 2 5 tKID DTMF tTD tITP tITP tITP T/P MUTE MASK High DP OSC Oscillation Oscillation 13405 Figure 5. DTMF mode normal dialing 12 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB HKS tKRD KEY IN t<tOHD R/P tKID DTMF tTD tITP tITP T/P MUTE MASK High DP Oscillation OSC 13406 Figure 6. DTMF mode auto dialing HKS tKRD KEY IN t tOHD R/P tKID DTMF tTD tITP T/P MUTE MASK DP OSC High Oscillation 13407 Figure 7. DTMF mode auto dialing TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 13 (23) Preliminary Information U3761MB Access Pause ÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á ÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ OFF HOOK , D1 , D2 , R/P , D3 , ..., 1. The pause function can be stored in memory. 2. The pause function is executed in normal dialing and redialing. Dn’ HKS KEY IN tKID 2 R/P 3 B tIDP B DP M M tPDP tPDP T/P MUTE tP MASK DTMF OSC Low Oscillation 13408 Figure 8. Pause function 14 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB : Pulse-to-Tone ( /T) ÁÁÁÁÁÁÁ ÁÁÁÁÁ Á ÁÁ Á ÁÁÁ ÁÁ Á ÁÁÁ ÁÁ Á 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 : Á ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁ ÁÁÁ Á Á ÁÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ Á ÁÁÁÁ ÁÁÁ Á OFF HOOK 1. , 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) 2. 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 only by going on-hook. HKS KEY IN tKID 2 */T 3 B DP M tPDP tIDP T/P MUTE tP MASK DTMF OSC Oscillation 13409 Figure 9. Pulse-to-tone operation Earth The Earth pin will go high 400 ms and the pause time of 1 s will be added when the Earth key is pressed. It can be stored as a digit in Memory and has not the first priority. TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 15 (23) Preliminary Information U3761MB Flash (F1 or F2 or F3) ÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁ ÁÁ Á ÁÁ Á ÁÁÁ OFF HOOK , Fn 1. The dialer will execute flash break and all the flash pause time before the next digits is dialed out. 2. The flash key can be stored as a digit in memory, however, only one flash will be releases to users. 3. The system will return to the initial state after the flash pause time is finished. Low HKS KEY IN F F 3 tKID tFB DP tFP tFP T/P MUTE MASK DTMF tITP Oscillation OSC 13410 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 Absolute Maximum Ratings Parameters Line current DC line voltage Junction temperature Ambient temperature Storage temperature Total power dissipation, Tamb = 60°C Junction ambient SSO44 SDIP40 SSO44 SDIP40 Symbol IL VL Tj Tamb Tstg Ptot Ptot RthJA RthJA 16 (23) Preliminary Information Value 140 14 125 – 25 to + 75 – 55 to + 150 0.9 1.3 70 50 Unit mA V °C °C °C W W K/W K/W TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB 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 Parameters Line voltage Transmit and sidetone Input resistance Gain Gain change with current Gain deviation Line-loss compensation 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 = 5 mA IL = 20 mA IL = 30 mA IL = 73 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, 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 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 Distortion at line IL = 20 mA, S5 = open VL = 0.775 Vrms Maximum output voltage IL = 20 mA, swing at line Vmic = 50 mVoff Mute suppression transmit IL = 20 mA with privacy function y TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Symbol VL Min. 1.2 Typ. Max. 1.5 Unit V V V V 120 48.8 0.5 kΩ dB dB 0.5 dB 4.0 4.5 6.4 Ri Gs DGS 45 46.8 –0.5 80 47.8 DGS –0.5 DGs – 4.8 –6 –7 – 72 dB dBmp GSTA 10 15 20 dB 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 dt 2.3 6.3 2 V % 4 Vpp no ni VL max GSPRIV 3.4 60 dB 17 (23) Preliminary Information U3761MB DC Characteristics Dialer VDD2 = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9b Parameters Memory rentention current Pre-emphases DTMF distortion DP output sink current Keyboard input drive current Keyboard input sink current Keyboard resistance F1, F2, F3, E board resistance Mask sink / drive current Earth sink / drive current Test Conditions / Pins HKS = 1, VDD2 = 1.0 V Column/Row RL = 5 kW VPO = 0.5 V VI = 0 V VI = 2.7 V Symbol IMR Min. Typ. 1 2 – 30 d IPL IKD 0.5 30 IKS 200 Max. 0.2 3 – 23 400 5 300 IM H/L Ie H/L 0.5 0.5 Symbol tKID Min. Unit mA dB dB mA mA mA kW W mA mA AC Characteristics Dialer Parameters Keypad active in debounce Key release debounce Pre-digit pause Inter-digit pause ( auto dialing ) Make/break ratio DTMF output duration Inter-tone pause Flash break time F1 F2 F3 Flash pause time Pause time On Hook debounce time Earth time Earth pause time Test Conditions / Pins Typ. 20 Max. Unit ms tKRD tPDP tPDP tIDP 20 40 33.3 800 ms ms ms ms B/M pin = floating B/M pin = low Auto dialing, MODE = VDD MODE = GND Auto dialing, MODE = VDD MODE = GND M/B 40:60 33:67 87 70 87 140 % % ms C1 connected to VDD C2 connected to VDD C3 connected to VDD F1 F2 F3 tFB 98 250 600 ms ms ms 1 s 3.6 150 400 1 s ms ms s B/M pin = floating 10 ppS B/M pin = low 10 ppS C4 connected to VDD tTD tITP ms tFP tP tohd tet tpt 18 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB 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 VRIAC VRIAC R = 150 kΩ, C = 1 nF VRIAC > VRON VRON VROFF VRing = 25 V, Cout = 68 nF See figure 11 f1H f1L f2 Vout toff Min. 2.1 Typ. Max. 3.8 Unit mA 23.5 5.6 937 752 11.5 21 1010 808 12.5 23 65 V V 1083 868 14.0 Hz Hz Vpp ms 12459 Volt VRING 0 t VRIAC 0 t OUT Melody t 0 toff Figure 11. Turn off delay time Ordering Information Type U3761MB-ASD U3761MB-AFN U3761MB-AFNG3 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Package SDIP40 SSO44 SSO44 tape and reel 19 (23) Preliminary Information IN I/O IN 20 (23) Preliminary Information S1 I/O IN IN IN IN IN IN IN IN IN Ê 150K 1NF 47NF S11 S11 1 3.58 MHZ CLOCK TO TESTER TO TESTER I/O IN RCK GND PRIVACY MUTE C1 C2 C3 C4 C5 R1 R2 R3 R4 XT XT BM DP MODE HKS VDD DC S6 MIC2 S6 10K MFO 1 ST THA OUT VRIAC VBG VRING RDC AGC RECO2 RECO1 VI RECIN TIN VL AC 220NF 8.2K MICO S5 100NF TO TESTER 25K AC U3761MB MIC1 220UF VDD b a 25K VMIC I/O 12633 S8 47NF 4.7K 1.5K 68NF 39 12K DC 330 2.2UF 2.2NF VL 600 100UF S7 VRIAC VRECO 1UF 100MV VGEN a b DC VRING 100UF 620 13V IL VGEN 300MV/1KHZ AC IDC TO TESTER U3761MB Basic Test Circuit TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB Formulas for Parameters of Elecrtrical Characteristics of Speech Circuit Formulas referred to the basic test circuit. If not otherwise specified switches in basic test circuit are inactive. Transmit gain GS + 20 log ǒ Ǔ VL VMIC VMIC = 3 mV/1 kHz, S5 = open Receiving gain GR + 20 ǒ Ǔ log VRECO VL RX-mode: VGEN = 300 mV/1 kHz, S7b Line loss compensation transmit DGS GS(at IL 73 mA)–GS(at IL + + + 20 mA) TX-mode: VMIC = 3 mV/1 kHz, S5 = open ǒ Ǔ Sidetone reduction GSTA + 20 log VL (in TX–mode) VRECO ) GR 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 Gain change when muted GRM + 20 log VRECO (Mute VL + inactive)–20 log VRECO (Mute VL + active) VGEN = 100 mV/1 kHz, S5 = open, S8 = open Input impedance of microphone amplifier 50 k Ri + ǒ VL (s6 + closed) –1 + open) VL(S6 Ǔ TX-mode: VMIC = 3 mV/1 kHz, S5 = open TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 21 (23) Preliminary Information U3761MB Packaging Information Package SDIP40 Dimensions in mm 15.34 15.14 37.4 36.9 4.9 4.3 13.9 13.7 0.7 0.38 0.20 3.3 0.53 0.48 33.782 17.2 16.0 1.778 technical drawings according to DIN specifications 13027 1 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) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic 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 TELEFUNKEN microelectronic GmbH semiconductor division 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 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 TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 23 (23) Preliminary Information