ATMEGA328P-AU is an 8-bit AVR microcontroller from Microchip Technology in a 32-pin TQFP package — for embedded control and instrumentation. This is the chip behind the Arduino Uno: the largest hobbyist and educational ecosystem of any microcontroller, which means code examples and libraries for nearly every sensor. Selection advice: the AU suffix denotes TQFP-32 — the ATMEGA328P also ships in PDIP-28 (PU suffix), so match the full ATMEGA328P-AU code to your layout. The P (picoPower) variant is the low-power pick over the non-P version. Confirm your Flash and peripheral needs against the datasheet.
Ordering-code highlights reviewed against official manufacturer documentation.
Exact MPN, manufacturer and suffix
Supplier type, quantity and freshness
Lot, labels, photos and documents
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Browse existing catalog records — same series first, then the same category and manufacturer. These are not confirmed replacements; compatibility requires engineering review.
In-depth buyer guides on the market forces affecting this part category — allocation, mergers and technology shifts.
The manufacturer lists ATMEGA328P-AU as Not recommended for new designs. Manufacturer-channel supply is therefore lot-dependent and must be confirmed per RFQ — tell us your quantity and date-code requirements and we will check what can still be sourced. If you are designing this part in, ask us about an approved replacement before committing the BOM. See our verified alternatives reference for this device.
From the verified technical profile: CPU architecture: 8-bit AVR RISC; Flash memory: 32 KB; SRAM: 2 KB. These are the catalog-recorded values for ATMEGA328P-AU — always re-check them against the manufacturer datasheet revision quoted on your BOM before finalizing the design.