IL9270N ETC | Alldatasheet

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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 DTMF signal receiver (analog HM9270) IC IL9270N is (DTMF) signal two-channel receiver-decoder (code 2 from 8).IÑ is fabricated on CÌÎS 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 ÌHz. 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-À) APPLICATION * Àutomatic Òelephone Station * call alert paging * remote control systems * credit card systems * button telephone systems * answering mashine * domestic auto systems Arrangement and purpose of outputs Pin Symbol Purpose 05,06 07,08 11·14 IN+ IN- CS Vref NC OSC1,2 GND TOE Q1-Q4 StD ESt St/GT Vcc non inverting input ÎA inverting input ÎA operational amplifier outputÎA) reference voltage output (Vcc/2) unconnected tact input/output. general input of output inable three state data output control outputèÿ 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 block-scheme High Group Filter Amplifier High Group Filter Amplifier Digital detector Code transformer Output cascascade Two-tone input filter Offset voltage Reference voltage Tact Generator Reference voltage generator Control Logic IN+ IN- CS OSC1 OSC2 Vcc Gnd Vref St/Gt Est StD TOE Reference table of received DTMF signal and code under formation low group frequency, high group frequency, code under formation Hz Hz Q4 Q3 Q2 Q1 697 697 697 770 770 770 852 852 852 941 941 941 697 770 852 941 1209 1336 1477 1209 1336 1477 1209 1336 1477 1209 1336 1477 1633 1633 1633 1633 IÑ IL9270 connection scheme

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 DC ELECTRICAL CHARACTERISTICS(V CC = 5 V ± 5%, TA = +25°C) Guaranteed Limits Symbol Parameter Test Conditions Min Typ Max Unit VCC Supply Voltage 4.75 5.25 V ICC Supply Current 3.0 9.0 mA ISO Maximum Pull Up (Source) Current OE = 0 V 24 µA IOL Minimum Output-Low (Sink) Current VOUT =0.4 V 0.8 mA IOH Minimum Output-High (Source) Current VOUT =4.6 V 0.35 mA VTSt Steering Threshold Voltage 2.2 2.5 V RIN Input Impedance (Signal Inputs 1,2) @ 1 KHz 8 MΩ VREF Output Voltage No Load 2.4 2.8 V AVOL DC Open Loop Voltage Gain 65 dB ROR Output Resistance 10 kΩ AC ELECTRICAL CHARACTERISTICS (V CC = 5.0 V, TA =+25°C, FCLK = 3.579545 MHz) Guaranteed Limits Parameter Min Typ Max Unit Notes SIGNAL CONDITION Valid Input Signal MIN 27.5 mVRMS Level (each tone of composite signal) MAX 883 m VRMS Freq. Deviation Accept Limit ±1.5 % Freq. Deviation Reject Limit ±3.5 % Third Tone Tolerance -16 dB Dial Tone Tolerance 18 22 TIMING REQUIREMENTS (V CC = 5.0 V, TA = +25°C, FCLK = 3.579545 Mhz) Symbol Parameter Guaranteed Limits Notes

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 Min Max Unit tDP Tone Present Detection Time 5 14 ms tDA Tone Absent Detection Time 0.5 8.5 ms tREC Maximum Tone Duration Accept 40 ms (User Adjustable) tREC Minimum Tone Duration Reject 20 ms tID Acceptable Interdigit Pause 40 ms Refer to “Guard Time tDO Rejectable Interdigit Pause 20 ms Adjustment

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 Time diagram