Texas-Instruments-NE567V-Tone-decoder-Texas-Instruments-LM567CN-p-The-Texas-Instruments-NE567V-tone-decoder-uses-a-simple-RC-combination-to-set-the-centre-detection-frequency-A-small-number-of-other-external-components-set-the-bandwidth-&-output-delay-Applications-include-touch-tone-decoding-precision-oscillator-frequency-monitoring-&-control-wide-b&-FSK-demodulation-ultrasonic-controls-carrier-current-remote-controls-&-communications-paging-decoders-See-the-datasheet-for-pre