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| 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 Three by 32 digits direct (one touch) memory 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 D Adjustable DC characteristic D Symmetrical input of microphone amplifier D Receiving amplifier for dynamic or 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 Tone Ringer D 2 Tone ringer D Adjustable volume D RC oscillator D Adjustable threshold D Selectable flashing duration by key pad D Pause function 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 220 k HKS Tip HKS 5M 470 1m BC546 18 k 3k MPSA42 22 k 220 n 2n2 XT HKS Microphone - amplifier + Control function Mute control Sidetone amplifier 3n3 ST Pulse control logic Supply current regulator Control function AGC current generator D/A converter Receiver attenuation RECIN 2.2 m Receiving amplifier RECO1 100 RECO2 AGC 12 k RDC 39 VBG 1 W VI VRING Supply Power-on-reset VRIAC OUT Tone signal generator 10 k 28 V 10 m 390 100 m 1.8 k 47 n EP 2.4 k Transmit amplifier VL 680 MODE BM Mask DP VDD1 MFO MIC1 MIC2 MICO TIN CL 13 V 1W 330 2N5401 33 k 470 k 220 m 100 n A 220 k AA AA 10 k U3761MB Block Diagram / Applications 2 (23) 5V1 1M 75V Ring Read - write counter C o n t r o l RAM l o g i c Location latch Data latch & decoder ROW & column programmable counter Clock signal oscillator Divider Divider Bandgap reference Comparator with hysteresis THA 12630 220 k 3.58 MHz XT Earth Clock generator C1 C2 C3 C4 K e y b o a r d 1 2 3 S M1 R1 4 56 M2 R2 Figure 1. 7 8 9 A M3 R3 */T 0 # R/P N R4 F1 F2 F3 E i n t e r f a c e VDD Preliminary Information PRIVACY 47 n MUTE 1n RCK 150 k TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 GND U3761MB SDIP40 C1 C2 C3 C4 Earth XT XT MFO GND 1 2 3 4 5 6 7 8 9 40 39 38 37 36 35 34 33 32 C1 1 C2 2 C3 3 C4 4 Earth 5 NC 6 DP NC 7 MODE XT 8 BM XT 9 HKS MFO 10 MIC 1 10 MIC 2 11 31 VDD NC 11 30 OUT GND 12 29 28 RCK MIC 1 13 VL 13 RDC 14 NC 15 TIN 16 VI 17 MUTE 18 VBG 19 RECIN 20 12631 SSO44 44 43 42 41 40 39 38 37 36 35 34 R4 R3 R2 R1 Mask DP MODE BM HKS NC NC VDD OUT R4 R3 R2 R1 Mask U3761MB 33 32 U3761MB MICO 12 VRING MIC 2 14 MICO 15 VL 16 RDC 17 TIN 18 VI 19 MUTE 20 VBG 21 RECIN 22 12632 31 RCK 30 VRING 29 VRIAC 28 AGC 27 VRIAC 26 AGC 25 THA 24 ST 23 PRIVACY 22 RECO 1 21 RECO 2 27 THA 26 ST 25 24 23 PRIVACY RECO 1 RECO 2 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 3 (23) Preliminary Information U3761MB Pin Description SDIP40 1 2 3 4 5 15 6 SSO44 1 2 3 4 5 7, 6, 34, 35 8 Symbol C1 C1 Configuration Function Keyboard input C2 PD C3 C2-C4 C4 Earth NC XT XT PD PD Earth key Not connected A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator 40P PD 40P XT 7 9 XT XT PD XT 40P PD 40P 8 10 MFO Output of DTMF 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 Ground MFO Error (%) +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34 9 12 GND 4 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB SDIP40 10 SSO44 13 Symbol MIC 1 Configuration VI 1V 50K Function Inverting input of microphone amplifier MIC1 MIC2 1V 11 14 MIC 2 1V 50K MIC1 MIC2 50K 1V 12 15 MICO MICO PD 13 16 VL VL PD 16V RDC TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Preliminary Information E E EE E E E E E E E E VI VI VI 50K E PD PD Non-inverting input of microphone amplifier PD PD VI 1V Transmit pre-amp output which is normally capacitively coupled to Pin TIN 16K Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal. PD 5 (23) U3761MB AGC PD RDC 5.6K TIN PD 16V 17 19 VI VI 16V PD MUTE PD 6.7V 19 21 VBG VBG 6.7V PD 20 22 RECIN REC IN 22 24 RECO1 RECO2 RECO1 PD 6.7V 21 23 RECO2 RECO2 RECO1 PD 6.7V 6 (23) Preliminary Information E EE EE E EE EE E EE E E 18 20 MUTE 30K 60K E EE EE EE 16 18 TIN 1V MUTE VL VL 60K VL 60K E E SDIP40 14 SSO44 17 Symbol RDC Configuration VL PD 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 for an 600 W input impedance or 1.2 k for a 900 input impedance. Pin for testing VBG 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. 1V 1V TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB PRIVACY PD 24 26 ST ST PD 16V 25 27 THA VRIAC THA PD 6V 6V 20K 26 28 AGC AGC PD RDC 27 29 VRIAC 10K 50V PD 28 30 VRING VRING 30V PD 6.5K OUT PD 50V 29 31 RCK 3.4V RCK PD 6V 6V TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Preliminary Information EE VRIAC 70K EE EEE 12K E EEEE E E EE 6V 40K 6V 0.6V 140K SDIP40 23 SSO44 25 Symbol PRIVACY Configuration VI Function Input for handset mute 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. Ringer threshold adjustment 1V E VL 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. Ringing supply PD 200 DC supply voltage for the tone ringer is limited to 30 V with integrated Z-diode. RC clock oscillator for ringer 0.8V 7 (23) U3761MB SDIP40 30 SSO44 32 Symbol OUT VRING PD 30V 200 6.5K Configuration Function Buzzer output OUT 50V PD 31 33 VDD 6V 6V PD VDD 32 36 HKS HKS PD 33 37 BM B/M PD 34 38 MODE MODE 35 39 DP DP DP 36 40 Mask 8 (23) Preliminary Information E E VL Supply output for dialer part 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. 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 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) 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 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AA A A A AAA AA A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AA A A A AAA AA A A AA A AA A A A AAA AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AA A AA A A A AAA AA A A A AAA AA A The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes the pause function. A A A AA A A A A AAAAAAAAAAAAAAAAA A A A AA A A A A AA AAAAAAAAAAAAAAAAA A A A AA A A AAAAAAAAAAAAAAAAA A AAA A AA A A A A A AA A A A AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAA A AA A A Normal Dialing N: Notice function R/P: Redial and pause function key A: Indirect repertory dialing function key (LN 0 to 9) OFF HOOK , D1 , D2 , ..., Dn AAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAA A A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAAA AAAAA A AA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AA A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAA A AAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AAAA VDD TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Redialing 1. 2. 3. D D D D Keyboard Operation SDIP40 37 OFF HOOK S: Store function key 40 39 38 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. SSO44 41 44 43 42 , D1 Symbol R1 :/T R4 R3 R2 C1 1 4 7 F1 , D2 Preliminary Information , ..., R4 R3 R1 R2 C2 2 5 8 0 F2 Dn Configuration BUSY, Come PD PD PD PD C3 3 6 9 # F3 D :/T: : and pulse-to-tone key D M1 to M3: One-touch memory D F1, F2, F3: Flash keys ON HOOK A R/P C4 S E Function Keyboard input , M1 M2 M3 N OFF HOOK U3761MB R1 R2 R3 R4 , 9 (23) R/P AAAAAAAAAAAAAAAA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AA AAAAAAAAAAAAAAAA A A AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA A AAA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AA AA A AA AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA A AA AA AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AAAAAAAAAAAAAAAAAAAAA A AA AA AA AA AAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAA AA AA AA A AA A A AAAAAAAAA AAAAAAAAA A AA A A AA A AAAAAAAAA AAAAAAAAA A AA A AAAAAAAAA AA A AAAAAAAAAAAAAAAAAA AAA A AAA AA A AAAA A AAA AA A A AAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAA AAA A AAA AA A AAAAAAAAAAAAAAAAA AA A AAA AA A AAAAAAAAAAAAAA A A AA A A A AAAA AA A A AA A A AAAA AA A A AAAAAAAAAAAAAA AA A A AA A A A AAAAAAAAAAA AAAAAAAAAAA AA A A AAAAAAAAAAA AAAAAAAAAAA A AA A A A AA A A AAAAAAAAAAA AAAAAAAAAAA A AA A A AAAAAAAAAAA AA A A 5. A AA AAA AAA A AAAA AA A A A AA AAA AAA A AAAA AA A A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAA AAA A AAAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAA AAA A AAAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA AAA A AAAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA AAAA A AAA AA A A AA AAA AAAA A AAA AA A A AAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAA A AA AAA AAAA A AAA AA A AAAAAAAAAAAAAAAAAAAAAAAAAAA AA AAA AAAA A AAA AA A 2. 3. 1. Cascaded Dialing 2. 1. Notice (N) Reportery Dialing 4. Number Store U3761MB 10 (23) 4. 3. 2. 1. 2. 1. OFF HOOK OFF HOOK OFF HOOK OFF HOOK If the dialing of D1 to the N memory. In store mode, The store mode is released after the store function is executed or when the state of the hook switch is changed. D1, D2, ..., Dn will be stored in memory location and dialed out. D1 to Dn will be dialed out after the N key is pressed. D1, D2, ..., Dn will be stored in memory location but will not be dialed out. If the sequence of the dialed digits D1, D2, ..., Dn has not finished Repertory dialing + Normal dialing OFF HOOK OFF HOOK R/P and Redialing is valid as first key-in only. Redialing , , , , :/T D1 D1 N S R/P is the pause function key; , , + + Repertory dialing + keys can be stored as a digit in memory. , , , Mn A Normal dialing to D2 D1 D2 Normal dialing , Dn is finished, pressing the Preliminary Information , ..., , , ..., Ln D2 Dn Dn , ..., + Repertory dialing + , , Dn Normal dialing Normal dialing N S :/T , , is the pulse-to-tone function key. S S N , , Mn Mn key will cause D1 to Dn to be copied S (or (or will be ignored. TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 Ln Ln ) ) U3761MB HKS tKRD KEY IN 3 tKID DP tIDP T/P MUTE MB 4 2 2 tKID tPDP tIDP MB tIDP tPDP tIDP MASK DTMF Low OSC Oscillation Oscillation 13402 Figure 2. Pulse mode normal dialing HKS tKRD KEY IN R/P tK10 DP MB t tIDP MB tIDP tIDP MASK DTMF Low OSC Oscillation 13403 Figure 3. Pulse mode auto dialing TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 11 (23) Preliminary Information U3761MB HKS tKRD KEY IN R/P tK10 DP MB t tOHD tPDP T/P MUTE tIDP MB tIDP MASK DTMF Low OSC Oscillation 13404 Figure 4. Pulse mode auto dialing HKS tKRD KEY IN 3 tKID DTMF T/P MUTE 4 2 5 tTD tITP tITP tITP MASK DP High 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 R/P tKID DTMF T/P MUTE t tITP tITP MASK DP High OSC Oscillation 13406 Figure 6. DTMF mode auto dialing HKS tKRD KEY IN R/P tKID DTMF T/P MUTE t tOHD tTD tITP MASK DP High OSC Oscillation 13407 Figure 7. DTMF mode auto dialing TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 13 (23) Preliminary Information U3761MB Access Pause AA A A AA A A AA AA A A AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAA A AA A A AA A A AA AA A A A AA A A AA AA A AAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A AA AA AAAAAAAAAAAAAAAAAAAAAAAA A A AA A A AA AA A A OFF HOOK , D1 , D2 , R/P , D3 , ..., Dn' 1. 2. The pause function can be stored in memory. The pause function is executed in normal dialing and redialing. HKS KEY IN tKID DP M M 2 B R/P 3 B tIDP tPDP T/P MUTE tP tPDP MASK DTMF Low OSC Oscillation 13408 Figure 8. Pause function 14 (23) Preliminary Information TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 U3761MB Pulse-to-Tone (:/T) A A A A AA A A A A AA A AA A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A AA A AA A AA A A A A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A A AA A A A A AA A AA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA A A A AA A A A A AA A AA A A A AA A A A A AA A AA A 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) (Tone) 2. If the mode switch is set to tone mode, then the output signal will be: D1, D2, ..., Dn, (Tone) * (Tone) , D1', D2', ..., Dn' (Tone) 3. 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 DP M 2 B */T 3 tPDP T/P MUTE tIDP 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 AAA A A AAA A A AAAAAAAAAAA AAAAAAAAAAA A AAAAAAAAAAA AAA AA A AAAAAAAAAAA AAAAAAAAAAA AA A OFF HOOK , Fn 1. 2. 3. HKS KEY IN F tKID DP T/P MUTE MASK DTMF OSC Flash (F1 or F2 or F3) The dialer will execute flash break and all the flash pause time before the next digits is dialed out. The flash key can be stored as a digit in memory, however, only one flash will be releases to users. The system will return to the initial state after the flash pause time is finished. Low F tFB 3 tFP tFP tITP Oscillation 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 = 60C Junction ambient Symbol IL VL Tj Tamb Tstg Ptot Ptot RthJA RthJA 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 SSO44 SDIP40 SSO44 SDIP40 16 (23) Preliminary Information 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 / 1 W, Tamb = 25C, unless otherwise specified Parameters Line voltage 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 +60C IL = 20 mA RAGC = 12 kW, IL = 73 mA IL > 20 mA, GS = 48dB IL Symbol VL Min. 1.2 Typ. 4.0 4.5 6.4 Ri Gs 45 46.8 -0.5 -0.5 - 4.8 -6 80 47.8 120 48.8 0.5 0.5 -7 - 72 20 Max. 1.5 Unit V V V V k dB dB dB dB dBmp dB dBm dBm dB 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 DGS DGS DGs no GSTA y 20 mA w 10 1.3 -8 1 15 Single tone, IL 20 mA IL = 20 mA, S5 = closed PPRE = PHLG - PLLG, S5 = closed VL VL PPRE -4 3 IL 20 mA IL = 20 to 60 mA RAGC = infinite Tamb = -10 to +60C IL = 20 mA IL = 73 mA IL = 73 mA w DGR DGR DGR ni GR 3 -0.5 -0.3 - 4.7 -6 - 77.5 5 0.5 0.7 -7 - 71 dB dB dB dB dBm 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 y GRM VRECO Vear 24 0.8 1.3 29 0.9 1.6 34 dB VRMS Vrms 2.5 y VDD dt VL max GSPRIV 2.3 6.3 2 3.4 4 V % Vpp dB 60 TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 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 d IPL IKD IKS 0.5 30 200 400 5 300 IM H/L Ie H/L 0.5 0.5 Min. 1 Typ. 2 - 30 Max. 0.2 3 - 23 Unit mA mA mA W dB dB mA kW 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 Test Conditions / Pins Symbol tKID tKRD tPDP tPDP tIDP M/B tTD tITP tFB Min. Typ. 20 20 40 33.3 800 40:60 33:67 87 70 87 140 98 250 600 1 tP tohd tet tpt 3.6 150 400 1 Max. Unit ms ms ms ms ms % % ms ms B/M pin = floating 10 ppS B/M pin = low 10 ppS B/M pin = floating B/M pin = low Auto dialing, MODE = VDD MODE = GND Auto dialing, MODE = VDD MODE = GND C1 connected to VDD C2 connected to VDD C3 connected to VDD F1 F2 F3 ms ms ms s s ms ms s tFP Pause time On Hook debounce time Earth time Earth pause time C4 connected to VDD 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 Test Conditions / Pins VRIAC = 20 V VRIAC VRIAC R = 150 k, C = 1 nF VRIAC > VRON Symbol IRING VRON VROFF f1H f1L f2 Vout toff 937 752 11.5 21 Min. 2.1 Typ. Max. 3.8 Unit mA V V 1083 868 14.0 Hz Hz Vpp ms 23.5 5.6 1010 808 12.5 23 65 Audio sequence frequency Output voltage swing Turn-off delay VRing = 25 V, Cout = 68 nF See figure 11 Volt VRING 0 12459 t VRIAC 0 t OUT Melody t 0 toff Figure 11. Turn off delay time Ordering Information Type U3761MB-ASD U3761MB-AFN U3761MB-AFNG3 SDIP40 SSO44 SSO44 tape and reel Package TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 19 (23) Preliminary Information 12633 TO TESTER IN I/O I/O VMIC S7 100UF 1UF 10K S6 MIC1 VL 1.5K MIC2 MFO MICO TIN S6 VL 13V 4.7K 47NF 2.2NF 620 VI RECO1 100UF VRECO RECO2 330 AGC RDC 39 VBG VRING VRIAC OUT 68NF THA DC DC 12K 2.2UF 220NF S8 IDC S5 220UF 600 IL VGEN 300MV/1KHZ AC DC 100NF 25K 1 8.2K 100MV VGEN TO TESTER AC U3761MB Basic Test Circuit VDD a b VDD BM DP MODE HKS XT ST 25K I/O TO TESTER IN CLOCK IN S11 1 S11 XT RECIN 3.58 MHZ TO TESTER E Preliminary Information C1 C2 C3 C4 C5 R1 R2 R3 R4 IN IN IN IN IN IN IN IN IN U3761MB I/O MUTE S1 PRIVACY 47NF RCK GND VRIAC 1NF TELEFUNKEN Semiconductors Rev. A2, 23-Apr-97 150K AC VRING 20 (23) ab 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 VL VMIC VMIC = 3 mV/1 kHz, S5 = open Receiving gain GR + 20 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 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 + VL (s6 VL(S6 + closed) -1 + open) 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 37.4 36.9 4.9 4.3 0.7 3.3 0.53 0.48 33.782 1.778 0.38 0.20 17.2 16.0 13.9 13.7 15.34 15.14 technical drawings according to DIN specifications 1 13027 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 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 |
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