KT3170 Samsung, KT3170 Datasheet
KT3170
Available stocks
Related parts for KT3170
KT3170 Summary of contents
Page 1
... KT3170 INTRODUCTION The KT3170 is a complete Dual Tone Multiple Frequency (DTMF) receiver that is fabricated by low power CMOS and the Switched-Capacitor Filter technology. This LSI consists of band split filters, which seperates counting section which verifies the frequency and duration of the received tones before passing the cor- responding code to the output bus ...
Page 2
... KT3170 PIN DESCRIPTION Pin No Symbol Non inverting input of the op amp Inverting input of the op amp. Gain Select. The output used for gain adjustment of analog input 3 GS signal with a feedback resistor. Reference Voltage output ( REF input of V Input inhibit. High input states inhibits the detection of tones. This ...
Page 3
... KT3170 ABSOLUTE MAXIMUM RATINGS Characteristics Power Supper Voltage Analog Input Voltage Range Digital Input Voltage Range Output Voltage Range Current On Any Pin Operating Temperature Storage Temperature ELECTRICAL CHARACTERISTICS Characteristic Operating Voltage Operating Current Power Dissipation Input Voltage Low Input Voltage High ...
Page 4
... KT3170 AC ELECTRICAL CHARACTERISTICS Characteristic Valid Input Signal Range (each tone of composite signal) Dual Tone Twist Accept Acceptable Frequency Deviation Frequency Deviation Reject Third Tone Tolerance Noise Tolerance Dial Tolerance Crystal Clock Frequency Maximum Clock Input Rise Time Maximum Clock Input Fall Time ...
Page 5
... KT3170 TEST CIRCUIT LOW POWER DTMF RECEIVER 7 KS58006 8 KT3170 HL74HCTLS02 HL74LS47 LTS542R ...
Page 6
... KT3170 TIMING DIAGRAM DIGITAL OUTPUT Outputs Q1-Q4 are CMOS push pull when enabled (EO = High) and open circuited (high impedance) when disabled by pulling EO = Low. These digital outputs provide the hexadecimal code corresponding to the DTMF signals. The table below describes the hexadecimal. LOW ...
Page 7
... R3 = R2R5/(R2+R5), VOLTAGE GAIN = R5/R1 INPUT IMPEDANCE : 2 All resistors are 1% tolerance All capacitors are 5% tolerance Fig. 5 Differential Ended Input Configuration (RPC PGT t = (R1C AGT R = R1R2 ( (a) Decreasing t Fig. 6 Guard Time Adjustment Fig. 7 Oscillator Connection IN IN 100K V KT3170 REF (1/wC < PGT PGT AGT ...