When the Manufacturer's LTB Window Closes, the Open Market Is What's Left
Texas Instruments and Renesas continue to issue end-of-life notices on legacy parts as fab capacity refocuses on higher-margin products. Renesas's February 2026 EOL announcement (Notification EOL260002) consolidated legacy linear ICs. TI's 2025–2026 PDNs have walked back numerous SN74 logic, small-reel offerings, and discontinued analog parts. Last-time-buy windows are closing — what happens after?
A "last-time-buy" sounds like a guarantee, but it's really a deadline. Once the LTB window closes, the manufacturer doesn't make the part again. Whatever's out in distribution, customer inventory, or surplus stock is all that exists. For products with 10, 15, or 20-year production lifecycles — automotive ECUs, military systems, medical devices, industrial controls — that means the open market eventually becomes the only source.
This is the recurring sourcing reality for long-life designs. The 8-bit Microchip PIC16, the STMicro STM32F0, the ADI accelerometers, the TI SN74HC logic — these don't disappear when EOL'd; they migrate to the secondary market. Authenticating what shows up there is the real work.
American Microelectronics specializes in EOL, obsolete, and allocation-constrained parts across our 35 supported manufacturers. Independent screening through Global ETS or Whitehorse Labs for authenticity and gross defects using AS6081 / AS6171 methods, backed by our warranty.