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TIDA-01183: Cheaper 555 timer than TLC555

Part Number: TIDA-01183
Other Parts Discussed in Thread: OPA2377, TL431, SE555, NE555, TLC555

Hi team,

My customer want to increase the accuary of duty cycle of a 555 timer.

I found this reference design and want to introduce this technique(add TL431 and OPA2377 feedback loop).

Could you explain what negative impact is expected if the customer use cheaper traditional 555 timer like SE555, NE555 or so?

Best Regards,