U3762MB TEMIC | Alldatasheet
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Technical content
Features
Adjustable DC characteristic Symmetrical input of microphone amplifier Receiving amplifier for dynamic or piezo-electric earpieces Automatic line-loss compensation Anti-clipping in transmit direction Dialer DTMF / pulse switchable Pulse dialing 66/33 or 60/40 or DTMF dialing selectable by pin Flashing time duration 98 ms Pause function Last number redial up to 32 digits Standard low-cost crystal 3.57 MHz or ceramic resonator Key tone Tone Ringer 2-tone ringer Adjustable volume RC oscillator Adjustable threshold Benefits Low number of external components High quality through one IC solution
Ordering Information
Rev. A1, 15-Sep-98 Preliminary Information 2 (23) Block Diagram / Applications Mask 470 F PRIND MODE to key board matrix HKS ROW & column programmable counter Clock generator RAM Location latch Read – write counter Control logic Pulse control logic Supply current regulator Key– board inter– face XT
3.58 MHz
latch & decoder D / A converter Mute control VDD HFI HFO TEST Handsfree control logic MFO MIC1 MIC2 Micro– phone amplifier MICO TIN 220 nF 18 k 220 nF MPSA42 3 k 33 k HKS 220 k XT 2.2 nF CL 2.4 k 680 Transmit amplifier Control function Sidetone amplifier Control function AGC current generator Receiver attenuation Receiving amplifier VL ST 3.3 nF RECIN 47 nF RECO1 2.2 F 100 RECO2 330 1 F 470 13 V/ 1 W 5 M Tip Ring 75 V 5.1 V Clock signal oscillator Divider Supply Power on reset Tone signal generator Divider Bandgap reference Comparator with hysteresis AGC 12 k RDC 300 1.8 k VI 100 F MUTE MFIND VRING 10 F OUT 10 k THA 10 k VRIAC F */T 0 # R/P 1 nF RCK 150 k 2N5401 HKS 1 W 14912 100 k 2.2 F CLIM 470 nF 1 k VI Figure 1.
Rev. A1, 15-Sep-98 3 (23) Pin Description Mask MODE KT HKS n.c. VDD OUT RCK VRING VRIAC AGC THA ST CLIM RECO 1 RECO 2 Earth HFI HFO XT MFO GND MICO VL RDC TIN VI MUTE PRIND RECIN U3762MB XT MFIND MIC 1 TEST 14835 MIC 2 DP SSO44
Rev. A1, 15-Sep-98 Preliminary Information 4 (23) Pin Symbol Function Configuration Keyboard input VDD VDD Ê Ê VDD Ê Ê PD VDD C2–C4 ÊÊ VDD Ê PD = Protection Device Earth Earth key ( 604 ms high pulse, 1 s pause) VDD EARTH Ê PD HFI Input with 200 k pull-down resistor. HFI triggers HFO with each LH edge. HFI VDD VDD ÊÊ PD 200K Ê HFO Output will be toggled by each LH edge at HFI. HFO VDD ÊÊ PD XT XT A built-in inverter provides oscillation with an inexpensive 3.579545-MHz crystal or ceramic resonator XT VDD VDD VDD VDD XT Ê Ê Ê Ê PD PD MFO Output of DTMF DTMF output frequency Specified Actual Error (Hz) (Hz) (%) 697 699 +0.28 770 766 –0.52 852 848 –0.47 941 940 –0.10 1209 1216 +0.57 1336 1332 –0.30 1477 1472 –0.34 MFO VDD VDD Ê PD Ê Ê
Rev. A1, 15-Sep-98 5 (23) Configuration Function Symbol Pin MFIND Output switches to low being in temporary DTMF mode. Reset by on hook condition. VDD MFIND Ê PD MFIND GND Ground MIC 1 MIC 2 Inverting input of microphone amplifier Non-inverting input of microphone amplifier MIC2 VI VI MIC1 Ê Ê Ê PD PD 50K 50K MICO Transmit pre-amp output which is normally capacitively coupled to Pin TIN VI MICO Ê Ê Ê PD 16K VL Positive supply voltage input to the device. The current through this pin is modulated by the transmit signal. VL RDC PD PD 16V RDC An external resistor (1 W) is required from this pin to GND to control the DC input im- pedance of the circuit. It has a nominal value of 39 for low-voltage operation. Values up to 100 may be used to increase the available transmit output voltage swing at the expense of low-voltage operation. RDC AGC VL Ê PD PD TIN Input to the line output driver amplifier. Transmit AGC applied to this stage. TIN ÊÊ ÊÊ PD 5.6K 16V
Rev. A1, 15-Sep-98 Preliminary Information 6 (23) Configuration Function Symbol Pin VI This internal voltage bias line must be con- nected to VL via an external resistor which dominates the AC input impedance of the cir- cuit and should be 680 Ω for an 600- input impedance or 1.2 kΩ for a 900-Ω input im- pedance. VI Ê PD 16V MUTE Pin for testing VBG MUTE Ê PD MUTE 6.7V 30K PRIND PRIVACY indication pin Open collector with minimum 1 mA drive current to GND when PRIVACY = active PRIND VL Ê PD 6.7V RECIN Receive amplifier input. The receiving ampli- fication is regulated by an AGC. RECIN Ê 60K RECO2 RECO1 Output of the receive amplifier. Dynamic transducers with a minimum impedance of 100 can be directly driven by these outputs. RECO1 RECO2 VL Ê Ê PD 60K 6.7V Ê CLIM Time constant of anticlipping in transmit path. CLIM 2.2 F CLIM = GND: anticlipping inactive VL CLIM IDC PD Ê 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. ST Ê PD 16V THA Ringer threshold adjustment THA VRIAC Ê Ê Ê PD 12K 20K 140K Ê AGC The range of transmit and receive gain varia- tions 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. RDC AGC VL Ê PD PD VRIAC Ringing supply VRIAC Ê ÊÊ PD 50V 70K 10K
Rev. A1, 15-Sep-98 7 (23) Configuration Function Symbol Pin VRING DC supply voltage for the tone ringer is lim- ited to 30 V with integrated Z-diode. OUT VRING PD PD 30V 50V 200 6.5K RCK RC clock oscillator for ringer 3.4V 0.8V RCK ÊÊ ÊÊ Ê PD OUT Buzzer output OUT VRING PD PD 30V 50V 200 6.5K VDD Supply output for dialer part VL VDD Ê PD Ê TEST TEST input with 6.25 k pull-up resistor VDD VDD VDD TEST ÊÊ Ê Ê Ê PD 200K n.c. Not connected HKS Hook switch input. HKS = 0: On-hook state. Chip in sleep mode, no operation (with a pull-down resistor of about 400 k. HKS = 1: Off-hook state. Chip enable for normal operation. HKS VDD VDD Ê Ê PD 400k KT Keytone output only sent out in pulse mode KT VDD VDD Ê Ê PD
Rev. A1, 15-Sep-98 Preliminary Information 8 (23) Configuration Function Symbol Pin MODE Pulling MODE pin to: tone mode with 87 ms burst time and 140 ms pause tone mode with 87 ms DTMF burst and 87 ms pause pulse mode with 20 pps, Make/Break = 40/60 pulse mode with 20 pps, Make/Break = 33/66 pulse mode with 10 pps, Make/Break = 40/60 pulse mode with 10 pps, Make/Break = 33/66 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 VDD VDD MODE Ê Ê PD 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 VDD Ê Ê PD Mask Short mute during pulse dialing, active high MASK VDD PD Ê Keyboard input VDD Ê VDD Ê PD VDD VDD R2–R4 Ê Ê VDD Ê PD
Rev. A1, 15-Sep-98 9 (23) Keyboard Operation ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ F ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ R/P ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ R/P: Redial and pause function key /T: function; pulse-to-tone function F: Flash key : hand set, MIC mute Normal Dialing ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á Á Á ÁÁÁÁÁÁ ÁÁÁÁÁÁ OFF HOOK ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ , ..., ÁÁÁ ÁÁÁ Dn Á Á Á Á ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ Á Á 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 ÁÁÁÁÁ ÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁÁ Á Á Á ÁÁÁÁÁ ÁÁÁÁÁ OFF HOOK ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ , ..., ÁÁÁ ÁÁÁ Dn ÁÁÁÁÁÁ ÁÁÁÁÁÁ BUSY, Come ÁÁÁÁÁ ÁÁÁÁÁ ON HOOK ÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ OFF HOOK ÁÁ ÁÁ ÁÁÁ ÁÁÁ R/P Á Á Á Á ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁ ÁÁÁ Á Á 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
The pause function can be stored in the memory. The pause function is executed in normal dialing and redialing. Figure 8. Pause function
Figure 9. Pulse-to-tone operation
Rev. A1, 15-Sep-98 17 (23) 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 Test Conditions / Pin Symbol Min. Typ. Max. Unit Line voltage IL = 8 mA IL = 20 mA IL = 73 mA IL = 100 mA VL 3.6 5.9 6.9 1.4 3.85 6.55 4.1 7.2 8.2 V V V V Transmit and sidetone Input resistance Ri Ri 120 kΩ Gain IL = 20 mA, S5 = open Gs 46.8 47.8 48.8 dB Gain change with current IL = 20 to 60 mA RAGC = infinite GS –0.5 0.5 dB Gain deviation Tamb = –10 to +60°C IL = 20 mA GS –0.5 0.5 dB Line-loss compensation RAGC = 12 k, IL = 73 mA Gs –4.8 dB Max. output voltage at line IL = 20 mA, Vmic = 10 mV, CLIM = 2.2 F, S1 = open VLmax 1.2 dBm Noise at line weighted psophometrically IL > 20 mA, GS = 48dB no – 72 dBmp Sidetone reduction IL 20 mA GSTA dB DTMF amplifier Volume range d < 5% Single tone, IL 20 mA VL 1.3 dBm DTMF output level low frequency group IL = 20 mA, S5 = closed VL dBm Pre-emphasis between high- and low-level frequency group PPRE = PHLG – PLLG, S5 = closed PPRE dB Receiving amplifier Gain IL 20 mA GR dB Gain change with current IL = 20 to 60 mA RAGC = infinite GR –0.5 0.5 dB Gain deviation Tamb = –10 to +60°C IL = 20 mA GR –0.3 0.7 dB Line-loss compensation IL = 73 mA GR –4.7 dB Receiving noise at earphone weighted psophometrially IL = 73 mA ni –77.5 –71 dBm Gain change when muted IL 20 mA GRM dB Output voltage push-pull IL 20 mA, Zear = 68 nF, 100 in series, d ≤ 2% VRECO 0.8 0.9 Vrms Ear protection differential IL = 40 mA, Vgen = 4 Vrms, Zear = 68 nF + 100 Vear 1.3 1.6 2.5 Vrms Supply voltage (for internal use only) Output voltage * IL 20 mA dialing mode VDD 2.0 6.3 V Available current for peripherals IL 20 mA dialing mode IDD 150 A Distortion at line VL = 0.775 Vrms IL = 20 mA, S5 = open dt Maximum output voltage swing at line IL = 20 mA, VMIC = 50 mVrms VL max 3.4 Vpp Mute suppression transmit with privacy function IL = 20 mA GSPRIV dB Output must be limited externally to max. 5.5 V
Rev. A1, 15-Sep-98 Preliminary Information 18 (23) DC Characteristics Dialer VDD = 2.7 V, fOSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 0 Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Memory rentention current HKS = 1, VDD = 1.0 V IMR 0.1 A Pre-emphasis Column/Row dB DTMF distortion RL = 5 k d –30 –23 dB DP output sink current VPO = 0.5 V IPL 0.5 mA Keyboard input drive current VI = 0 V IKD A Keyboard input sink current VI = 2.7 V IKS 500 A Key on resistance all other keys RKON k Key off resistance RKOFF 100 k Mask sink / drive current IM H/L 0.5 mA Earth sink / drive current Ie H/L 0.5 mA AC Characteristics Dialer Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit Keypad active in debounce mode tKID ms Key release debounce tKRD ms Pre-digit pause MODE pin = R3 (10 pps) MODE pin = C1, C2, C4 (10 pps) tPDP tPDP 33.3 33.5 ms ms MODE pin = R1 (20 pps) MODE pin = R2 tPDP tPDP 16.65 ms ms Inter-digit pause (auto dialing) 10 pps, tIP = tIDP + tPDP 20 pps tIP tIP 810 836 512 860 ms ms Make/break ratio MODE pin = R1 (20 pps), R3 (10 pps) MODE pin = C1, C2, R4 (10 pps) R2 (20 pps) M/B 40.8:60.2 35.6:64.4 40:60 33:67 39.2:60.8 31.2:68.8 DTMF output duration Auto dialing, MODE = C4 MODE = C3 tTD ms ms Inter-tone pause Auto dialing, MODE = C4 MODE = C3 tITP 135 140 147 ms ms Flash break time, F C4 connected to R3 tFB 101 ms Flash pause time F tFP 0.9 1.1 s Pause time tP 3.5 3.6 3.7 s On-hook debounce time tohd 220 ms
Figure 14. Turn-off delay time
Figure 15. Basic test circuit
Rev. A1, 15-Sep-98 21 (23) 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 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 GS 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 VRECO(in TX–mode) GR TX-mode: VMIC = 3 mV/1 kHz, S5 = open Line-loss compensation receive GR 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 VL (Mute inactive)–20 log VRECO VL (Mute active) Vgen = 100 mV/1 kHz, S5 = open, S8 = open Input impedance of microphone amplifier Ri 50 k VL(S6 closed) VL(S6 open) TX-mode: VMIC = 3 mV/1 kHz, S5 = open
Rev. A1, 15-Sep-98 Preliminary Information 22 (23) Packaging Information 13040 technical drawings according to DIN specifications Dimensions in mm 0.25 0.10 0.3 0.8 18.05 17.80 16.8 2.35 9.15 8.65 7.50 7.30 10.50 10.20 0.25
Rev. A1, 15-Sep-98 23 (23) 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