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. By Consumer Microcircuits Limited
CMX661 's PackagesCMX661 's pdf datasheet

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CMX661 Application circuits
CMX661 circuits
This is one application circuit of CMX661,If you need more circuits,please download CMX661's pdf datasheet.

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