XR-567A

XR·567A Precision Tone Decoder GENERAL DESCRIPTION The XR-567A provides all the necessary circuitry for constructing a variety of tone detectors and frequency decoders. Phase-locked loop circuit techniques are used to provide operation from 0.01 Hz tp 500 kHz. The circuit also features an input preamp, a high-current logic output, and programmable output delay. The XR-567A, available in an a-Pin DIL package, is designed to offer improved frequency accuracy and drift characteristics over the standard industry 567. These changes offer improved overall circuit performance, while reducing initial circuit adjustments. FUNCTIONAL BLOCK DIAGRAM OUTPUT FILTER LOW-PASS LOOP FILTER INPUT +Vcc OUTPUT GROUND "I TIMING RESISTOR AND CAPACITOR .J FEATURES Programmable Detection Bandwidth 0% to 14% Logic Output 100 mA Wide Center Frequency Range 0.01 Hz to 500 kHz High Rejection of Out-ot-Band Signals and Noise Direct Replacement for standard 567 Inherent immunity to out-ol-band sign...