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LM258: LM258DR内部晶圆为什么是LM358?

Part Number: LM258
Other Parts Discussed in Thread: LM358

因产品售后问题,排查故障板原因为LM258DR这个芯片的问题,刨片后,晶圆内部显示LM358,为什么LM258DR晶圆内部为什么是LM358呢?