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IL9270N

ETC
Part Number IL9270N
Manufacturer ETC
Description DTMF signal receiver
Published Sep 24, 2005
Detailed Description IL9270N DTMF signal receiver (analog HM9270) IC IL9270N is (DTMF) signal two-channel receiver-decoder (code 2 from 8).I...
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IL9270N
IL9270N

Overview
IL9270N 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 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 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 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 act 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 fr...


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