MX651P 查看數據表（PDF） - MX-COM Inc
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MX651P Datasheet PDF : 13 Pages
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Telephone SPM and Anti Fraud Tone Processor
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MX651 - PRELIMINARY INFORMATION
CONTENTS
Section ............................................................................................................................................... Page
1. Block Diagram .................................................................................................................................. 3
2. Signal List ......................................................................................................................................... 4
3. External Components ...................................................................................................................... 5
4. General Description ......................................................................................................................... 6
4.1 Overall Function ........................................................................................................................................ 6
4.1.1 SPM (12kHz) Detector .......................................................................................................................................6
4.1.2 Security Tone (18kHz) Detector (Rx Mode Only) ..............................................................................................6
4.1.3 Security Tone Transmission (Tx Mode Only).....................................................................................................6
4.2 Description of Blocks (Reference Figure 1) ............................................................................................ 6
4.2.1 Input Amplifier ....................................................................................................................................................6
4.2.2 Sample and Hold (12kHz Channel) ...................................................................................................................6
4.2.3 Filtering and Frequency Detection (12kHz Channel) .........................................................................................6
4.2.4 Sample and Hold (18kHz Channel) ...................................................................................................................6
4.2.5 Filtering and Frequency Detection (18kHz Channel) .........................................................................................6
4.2.6 Clock Oscillator and Dividers .............................................................................................................................7
4.2.7 (Gate ON-OFF) (Tx Only) ..................................................................................................................................7
4.2.8 Band Pass Filter (Tx Only).................................................................................................................................7
5. Application ....................................................................................................................................... 7
5.1 Device Sensitivity versus VDD - Input Amplifier Gain ................................................................................ 7
5.2 Alias Responses - False Decodes ............................................................................................................ 7
5.2.1 12kHz Channel ..................................................................................................................................................7
5.2.2 18kHz Channel ..................................................................................................................................................8
6. Performance Specifications............................................................................................................ 8
6.1 Electrical Performance .............................................................................................................................. 8
6.2 System Timing ......................................................................................................................................... 11
6.2.1 Timing Diagrams...............................................................................................................................................11
6.3 Packaging ................................................................................................................................................ 12
MX•COM, Inc. reserves the right to change specifications at any time and without notice.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480137.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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