Below x-ray picture is came from a reel, but the dies have different.
Which middle on the left die is round and the middle on the right is square
Is it normal?
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Below x-ray picture is came from a reel, but the dies have different.
Which middle on the left die is round and the middle on the right is square
Is it normal?
Hi
如果同是直接购买自TI, 很奇怪出现2种差异,因为没有必要两种设计。你却要取人购买渠道,因为TL431应该不止一个厂家出产。
但是即便都购买自TI, 也不会有问题,芯片出厂X-RAY虽然不一定会100%测试,但是电性测试是必须的,机构上的差异不影响电性的。
(我无法确认,芯片类明显的机构设计差异是否就是因为两种设计,但不影响电性)