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AFE58JD48: AFE58JD48ZAV Marking Consultation

Part Number: AFE58JD48

Dear Expert

When the AFE we used, AFE58JD48ZAV, was registered and submitted for inspection, the laboratory needed to confirm the chip signal, but the silk screen on the chip was different from the specification book, there was an extra character "P".

What does this character stand for? Marking in the specification book: AFE58JD48.