MT88L70 Zarlink Semiconductor, MT88L70 Datasheet
MT88L70
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MT88L70 Summary of contents
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... Volt Integrated DTMF Receiver MT88L70AE MT88L70AS MT88L70AN Description The MT88L70 is a complete 3 Volt, DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code. External component count is minimized by on chip provision of a differential input amplifi ...
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... MT88L70 VRef INH PWDN OSC1 11 OSC2 8 10 VSS 9 18 PIN PDIP/SOIC Pin Description Pin # Name IN+ Non-Inverting Op-Amp (Input IN- Inverting Op-Amp (Input Gain Select. Gives access to output of front end differential amplifier for connection of feedback resistor ...
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... Functional Description The MT88L70 monolithic DTMF receiver offers small size, low power consumption and high performance, with 3 volt operation. Its architecture consists of a bandsplit filter section, which separates the high and low group tones, followed by a digital counting section which verifies the frequency and duration of the received tones before passing the corresponding code to the output bus ...
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... DD DD TSt Differential Input Configuration The input arrangement of the MT88L70 provides a differential-input operational amplifier as well as a bias source (V mid-rail. Provision is made for connection This may be GTA feedback resistor to the op-amp output (GS) for adjustment of gain single-ended configuration, ...
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... OSC1 Q2 OSC2 Q1 V TOE SS Applications Ref A single-ended input configuration is shown in Figure permits the 6. For applications with differential signal inputs the . 5 circuit shown in Figure 5 may be used. MT88L70 2 3 NOTES: = 100 kΩ ± 300 kΩ ± 100 nF ± X-tal = 3.579545 MHz ± ...
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... MT88L70 Absolute Maximum Ratings Parameter 1 DC Power Supply Voltage 2 Voltage on any pin 3 Current at any pin (other than supply) 4 Storage temperature 5 Package power dissipation † Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied. ° ° Derate above ...
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... 1.5 CM ° C ≤ =3.0V +20%/-10%, V =0V, - ‡ Sym Min Typ -34 15.4 ±1.5% ± ±3.5% -16 -12 +22 ± MT88L70 ° C, unless otherwise stated. Units Test Conditions ≤ V ≤ MΩ kHz + 0.75 V ≤ V ≤ -0.75 DD biased at V =1.5 V ...
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... MT88L70 AC Electrical Characteristics Characteristics 1 Tone present detect time 2 Tone absent detect time Tone duration accept Tone duration reject Interdigit pause accept 6 Interdigit pause reject 7 Propagation delay ( Propagation delay (St to StD Output data set StD) ...
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... GTP t GUARD TIME, TONE ABSENT. GTA REC ID TONE TONE # GTA GTP QStD # n t PSrD -Q TO ITS HIGH IMPEDANCE STATE Figure 7 - Timing Diagram MT88L70 TONE # TSt HIGH IMPEDANCE # ( PTE t PTD 4-31 ...
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... MT88L70 Notes: 4-32 ...
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... For more information about all Zarlink products Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use ...