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MX651 Datasheet

  • MX651

  • Telephone Subscriber Pulse Metering & Anti Fraud Tone Proces...

  • 14頁

  • CMLMICRO

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DATA BULLETIN
MX651
Features
鈥?/div>
Rapid 18kHz tone encoder-decoder can
transfer NRZ data
Tx up to 166bps
Rx up to 62bps
鈥?/div>
12kHz Subscriber Pulse Metering
Detector
Telephone
Subscriber Pulse Metering &
Anti Fraud Tone Processor
PRELIMINARY INFORMATION
Applications
鈥?/div>
Meets European 12kHz SPM Frequency
Specifications
鈥?/div>
Payphone Applications
鈥?/div>
Card Operated Telephone Installations
鈥?/div>
Component Adjustable Input Sensitivity
鈥?/div>
Low Power 3.3V/5.0V Operation
NRZ
DATA
EXT
CLKIN
XTAL
Clock Oscillator
and Dividers
XTAL
RX/TX
AMPOUT
IN
IN
V
BIAS
V
SS
V
DD
Sample
& Hold
Sample
& Hold
Digital
Amplifier
Modulator
Band Pass
Filter
TXOUT
Filtering and
Frequency Detection
12kHz Channel
DETECT
12kHz
Filtering and
Frequency Detection
18kHz Channel
DETECT
18kHz
The MX651 is a low power integrated circuit which combines 12kHz Subscriber Pulse Metering (SPM) detection with
18kHz tone processing for anti-fraud purposes within a telephone system. Suitable for battery or line powered systems,
the MX651 is protected from crosstalk and false decoding by employing high accuracy switched capacitor filters. By using
simple logic or
碌Processor
control the MX651 will:
鈥?/div>
Decode 12kHz SPM pulses (in the presence of high level voice and 18kHz signaling) and provide a logic output.
鈥?/div>
Transmit an NRZ amplitude modulated 18kHz security tone to line.
鈥?/div>
Decode an incoming modulated 18kHz security tone (in the presence of high level voice and 12 kHz SPM tones)
and provide a logic output.
The MX651 is available in a 16-pin SOIC (MX651DW) and a 16-pin PDIP (MX651P) package.
漏 1997 MX鈥OM 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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  • 英文版
    Telephone Subscriber Pulse Metering & Anti Fraud Tone Proces...
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