HT9170B Holtek, HT9170B Datasheet
HT9170B
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HT9170B Summary of contents
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... No external filter is required Low standby current (on power down mode) Excellent performance General Description The HT9170B/D are Dual Tone Multi Frequency (DTMF) receivers integrated with digital decoder and bandsplit filter functions as well as power-down mode and inhibit mode operations. Such devices use digital counting techniques to detect and decode all the 16 DTMF tone pairs into a 4-bit code output ...
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... CMOS OUT Early steering output (see Functional Description) Tone acquisition time and release time can be set through connection with ex- RT/GT I/O CMOS IN/OUT ternal resistor and capacitor. VDD Positive power supply, 2.5V~5.5V for normal operation Rev. 1.10 HT9170B/HT9170D Description / September 24, 2002 ...
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... Low Input Current IL I High Input Current IH R Pull-high Resistance (OE Input Impedance (VN, VP Source Current (D0~D3, EST, DV Sink Current (D0~D3, EST, DV System Frequency OSC Rev. 1.10 HT9170B/HT9170D Storage Temperature ............................ 125 C +0.3V Operating Temperature........................... Test Conditions Min. Typ. V Conditions DD 2.5 5V 3.0 5V PWDN= 4.0 V ...
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... Rejected Inter-digit Pause IR t Propagation Delay (RT/GT to DO) PDO t Propagation Delay (RT/GT to DV) PDV t Output Data Set Up (DO to DV) DOV t Disable Delay (OE to DO) DDO t Enable Delay (OE to DO) EDO Note: DO=D0~D3 Rev. 1.10 HT9170B/HT9170D f =3.5795MHz, Ta=25 C OSC Test Conditions Min. Typ. V Conditions ...
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... Functional Description Overview The HT9170B/D tone decoders consist of three band pass filters and two digital decode circuits to convert a tone (DTMF) signal into digital code output. An operational amplifier is built-in to adjust the input sig- nal (refer to Figure 2). Figure 2. Input operation for amplifier application circuits The pre-filter is a band rejection filter which reduces the dialing tone from 350Hz to 400Hz ...
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... Timing Diagrams Rev. 1.10 HT9170B/HT9170D Figure 3. Steering timing Figure 4. Power up timing 6 September 24, 2002 ...
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... Note: Z High impedance; ANY Any digit Rev. 1.10 HT9170B/HT9170D (c) t > GTP GTA GTP DD DD TRT t = ( GTA DD TRT Digit ...
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... The data outputs (D0~D3) are tristate outputs. When OE input becomes low, the data outputs (D0~D3) are high imped- ance. Application Circuits Application Circuit Note: X¢tal = 3.579545MHz crystal 20pF X¢tal = 3.58MHz ceramic resonator 39pF Application Circuit Note: X¢tal = 3.579545MHz crystal 20pF X¢tal = 3.58MHz ceramic resonator 39pF Rev. 1.10 HT9170B/HT9170D September 24, 2002 ...
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... Package Information 18-pin DIP (300mil) outline dimensions Symbol Min. A 895 B 240 C 125 D 125 295 I 335 0 Rev. 1.10 HT9170B/HT9170D Dimensions in mil Nom. Max. 915 260 135 145 20 70 100 315 375 15 9 September 24, 2002 ...
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... SOP (300mil) outline dimensions Symbol Min. A 394 B 290 447 Rev. 1.10 HT9170B/HT9170D Dimensions in mil Nom. Max. 419 300 20 460 104 September 24, 2002 ...
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... Reel dimensions SOP 18W Symbol Description A Reel Outer Diameter B Reel Inner Diameter C Spindle Hole Diameter D Key Slit Width T1 Space Between Flange T2 Reel Thickness Rev. 1.10 HT9170B/HT9170D Dimensions in mm 330±1.0 62±1.5 13.0+0.5 -0.2 2.0±0.5 24.8+0.3 -0.2 30.2±0.2 11 September 24, 2002 ...
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... P1 Cavity to Perforation (Length Direction) A0 Cavity Length B0 Cavity Width K0 Cavity Depth t Carrier Tape Thickness C Cover Tape Width Rev. 1.10 HT9170B/HT9170D Dimensions in mm 24.0+0.3 0.1 16.0 0.1 1.75 0.1 11.5 0.1 1.5 0.1 1.5+0.25 4.0 0.1 2.0 0.1 10.9 0.1 12.0 0.1 2.8 0.1 ...
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... Holtek¢s products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.10 HT9170B/HT9170D 13 September 24, 2002 ...