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| IL9270N DTMF signal receiver (analog HM9270) IC IL9270N is (DTMF) signal two-channel receiver-decoder (code 2 from 8).IN is fabricated on CIIS technology and containes bandpass filters on switched capacitors. IC checks length of incoming twochannel signal dispatches and pauses between them. Information output as 4-digit binary code.IC clocking is carried out from quartz(-crystal) resonator with frequency Fc= 3,579545 IHz. MAIN CHARACTERISTICS demodulates all 16 standard DTMF signals Low consumed capacitance: 15 mW One power source: 5 V+-5% quarts generator with frequency 3,58 mHz is used three state outputs probability of mistaken decoding is 1/10000 Package - plastic 18-connection DIP (type 2104.18-A) APPLICATION * Automatic Oelephone Station * call alert paging * remote control systems * credit card systems * button telephone systems * answering mashine * domestic auto systems Arrangement and purpose of outputs Pin 01 02 03 04 05,06 07,08 09 10 11*14 15 16 17 18 Symbol IN+ INCS Vref NC OSC1,2 GND TOE Q1-Q4 StD ESt St/GT Vcc Purpose non inverting input IA inverting input IA operational amplifier outputIA) reference voltage output (Vcc/2) unconnected tact input/output. general input of output inable three state data output control outputey output of early control control input/output power +5 V Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: belms@belms.belpak.minsk.by URL: www.bms.by IL9270N block-scheme High Group Filter Two-tone input filter Amplifier Digital detector Code transformer Output cascascade IN+ Q1 Q2 Q3 Q4 INCS High Group Filter Offset voltage Amplifier Reference voltage OSC1 T ct a Generator OSC2 Reference voltage generator Control Logic Vcc Gnd Vref St/Gt Est StD TOE Reference table of received DTMF signal and code under formation low group frequency, Hz 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 941 high group frequency, Hz 1209 1336 1477 1209 1336 1477 1209 1336 1477 1209 1336 1477 1633 1633 1633 1633 code under formation Q4 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 Q3 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 IN IL9270 connection scheme Q2 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 Q1 1 0 1 1 1 0 1 0 1 0 1 0 1 0 1 Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: belms@belms.belpak.minsk.by URL: www.bms.by IL9270N DC ELECTRICAL CHARACTERISTICS(V CC = 5 V 5%, T A = +25C) Symbol Parameter Test Conditions Guaranteed Limits Min VCC ICC ISO IOL IOH VTSt RIN VREF AVOL ROR Supply Voltage Supply Current Maximum Pull Up (Source) Current Minimum Output-Low (Sink) Current Minimum Output-High (Source) Current Steering Threshold Voltage Input Impedance (Signal Inputs 1,2) Output Voltage DC Open Loop Voltage Gain Output Resistance Parameter Guaranteed Limits Min SIGNAL CONDITION Valid Input Signal Level (each tone of composite signal) Freq. Deviation Accept Limit Freq. Deviation Reject Limit Third Tone Tolerance Dial Tone Tolerance Symbol Parameter 18 3.5 -16 22 Guaranteed Limits Notes MIN MAX 883 1.5 27.5 mVRMS m VRMS % % dB Typ Max @ 1 KHz No Load OE = 0 V VOUT =0.4 V VOUT =4.6 V 0.8 0.35 2.2 8 2.4 65 10 Unit 2.8 2.5 4.75 3.0 Typ Max 5.25 9.0 24 V mA A mA mA V M V dB k Notes Unit AC ELECTRICAL CHARACTERISTICS (V CC = 5.0 V, T A =+25C, F CLK = 3.579545 MHz) TIMING REQUIREMENTS (V CC = 5.0 V, T A = +25C, F CLK = 3.579545 Mhz) Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: belms@belms.belpak.minsk.by URL: www.bms.by IL9270N Min tDP tDA tREC tREC tID tDO Tone Present Detection Time Tone Absent Detection Time Maximum Tone Duration Accept Minimum Tone Duration Reject Acceptable Interdigit Pause Rejectable Interdigit Pause 20 20 40 5 0.5 Max 14 8.5 40 Unit ms ms ms ms ms ms Refer to "Guard Time Adjustment (User Adjustable) Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: belms@belms.belpak.minsk.by URL: www.bms.by IL9270N Time diagram Korzhenevskogo 12, Minsk, 220064, Republic of Belarus Fax: +375 (17) 278 28 22, Phone: +375 (17) 278 07 11, 277 24 70, 277 24 61, 277 69 16 E-mail: belms@belms.belpak.minsk.by URL: www.bms.by |
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