Lifecycle score 73/100 (healthy).
Status: active
JSMSEMI TL494 is confirmed in-stock at multiple distributors (LCSC: 6,010 units; JLCPCB: 1,232 units) with active production and broad second-sourcing from Texas Instruments, ON Semiconductor, and other vendors. No EOL announcement detected. This is a mature 40+-year-old legacy PWM controller design with stable supply and no imminent discontinuation evident.