@1762531031609206_457326
<p>Doorbells ride long cables and lightning-adjacent wiring. We hold A-weighted SNR ≥106 dB, THD+N ≤0.0008%, output noise under 20 μVrms, and PSRR >90 dB @217 Hz. Transport is TDM 8-slot @12.288 MHz; playback remains I2S. Boundaries: −40–105 °C and hot-plug events. Compliance: CISPR 32, IEC 61000-4-2; safety: IEC 62368-1. Methods include soft-start, π-filters, Zobel damping, ferrite/LC recon, star-grounds, and debounced jack-detect. Tests: FFT sweeps, pop-captures, GTEM, thermals. Outcome: quiet inserts and stable tones — details: clickless de-pop mute sequencehttps://www.yy-ic.com/category/integrated-circuits-ics-430.</p>