On paper, you can sometimes find similar parts from other suppliers. In reality, it’s rarely straightforward. Pin-to-pin replacements are uncommon, and even when the data-sheets look like a close match, validation testing often shows differences in heat behaviour, tolerance, or long-term stability.
One automotive team found a part that looked like a 95% match. It still took nine months and four rounds of testing before engineers felt comfortable approving it. And that was for just one device. For half their BOM, they admitted, there isn’t even a viable option yet.
That said, opportunities do exist. Some competitors in analog and power management have broadened their product lines, and there are second-source options for certain signal chain devices. But these chances only benefit the companies who start mapping today.