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OPA2188: OPA2188AIDR different bottom markings

Part Number: OPA2188
Other Parts Discussed in Thread: INA114


My end user/customer brought up this question regarding bottom marking for part#OPA2188AIDR

There are 2 different types of bottom markings In the same reel and wonder if it is typical for this part:


The curve tracing has been tested and shows consistency among samples while my end user has this bottom marking question waiting to be confirmed.

Please help clarify.