XD567 – Tone Decoder / PLL – Xinluda

The Xinluda XD567 is a general-purpose phase-locked-loop (PLL) tone decoder in a DIP-8 package, functionally compatible with the classic NE567/LM567. It provides a saturated transistor-to-ground output when an in-band input tone is detected.

The Xinluda XD567 is a general-purpose tone decoder (phase-locked loop) supplied in a through-hole DIP-8 package. It is functionally compatible with the industry-standard NE567/LM567, making it a convenient option for legacy and new tone-detection designs. The device contains in-phase (I) and quadrature (Q) detectors driven by a voltage-controlled oscillator (VCO) that sets the decoder center frequency. When an input signal falls within the decoder passband, the XD567 drives a saturated transistor switch to ground, producing a logic-compatible output. Center frequency, bandwidth, and output delay are each set independently using a few inexpensive external resistors and capacitors. The pin-for-pin SOP-8 (SOIC) surface-mount version is offered by Xinluda as the XL567.

Key Features

• General-purpose tone decoder / PLL, functionally compatible with NE567 / LM567
• Power supply voltage range: 4.75 V to 9.0 V (typ 5.0 V)
• Center frequency adjustable from 0.01 Hz up to 500 kHz, set by external R-C
• Largest detection bandwidth typically 14% of center frequency (adjustable 0 to ~14%)
• Logic-compatible output with up to 100 mA sink (saturated transistor switch to ground)
• Input resistance approximately 18-20 kΩ (typ 20 kΩ)
• Smallest detectable input voltage approximately 20-25 mV rms
• Junction-to-ambient thermal resistance RθJA ≈ 53.0 °C/W (PDIP) / 107.5 °C/W (SOIC)
• Package: DIP-8 (XD567); SOP-8 variant available as XL567

Applications

• Touch-tone (DTMF) and audio tone decoding
• Ultrasonic and carrier-current remote controls
• Communications / wideband FSK signal detection and paging decoders
• Precision oscillator and frequency monitoring
• Presence / frequency-gate detection in industrial and consumer equipment

Why Source XD567 from Pacific Component Xchange

The XD567 is a niche, regionally manufactured tone decoder with little to no authorized-distributor stock outside of a handful of Asian marketplaces, which makes it difficult to source reliably for production runs and legacy maintenance. Pacific Component Xchange specializes in hard-to-find and obsolete power-management ICs, interface ICs, and optocouplers. We help engineers and buyers secure the XD567 and equivalent NE567/LM567-class decoders through our global supplier network, with authenticity verification and worldwide shipping. Because this is a request-for-quote item, pricing and lead time are confirmed per order. Request a fast RFQ today and our sourcing team will return availability, dating, and a firm quote for the quantity you need.