CMX661 查看數據表（PDF） - MX-COM Inc

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CMX661

Pair Gain Dual SPM Detector

MX-COM Inc  

COMMUNICATION SEMICONDUCTORS

DATA BULLETIN

Features

• Two (12kHz/16kHz) SPM Detectors

• Standard 3.579545MHz Xtal

• Selectable Bandwidth Limits

• Excellent Speech-Band Rejection

• Low Power 3.0V to 5.0V Operation

CMX661

Pair Gain Dual SPM Detector

Advance Information

Applications

• Pair-Gain Systems

• Out-of-Band Signaling Systems

• Call Charge Applications in PBX and PABX

Line Cards

The CMX661 is a low power, Dual Subscriber Pulse Metering (SPM) Detector – two detectors on a single

chip – to indicate the presence on a telephone line of either 12kHz or 16kHz telephone call charge

frequencies. The detection frequency and bandwidth are common to both detectors and may be externally

selected. The detection sensitivity is set independently for each channel by external components and the

detector outputs can be set to a high impedance state for device multiplexing requirements in PBX and PABX

line card applications.

Flexibility of decode bandwidth settings allows the CMX661 to operate in systems where the SPM generation

is not necessarily perfectly accurate or stable. External hardwired selection of functionality economizes on the

number of host µC I/O control lines required, while the rapid response and de-response times of the CMX661

permit flexible tone length qualification by the host µC.

The CMX661 offers low (3.0V) operating voltage and power, consuming ≈750µA at 3V. It is available in low-

cost 16-pin plastic DIL and SOIC packages.

©2001 MX-COM, INC.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480228.001

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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