ATmega328P-AU KiCad symbol and footprint

What we checked

Checked against the datasheet

Source: Microchip DS40001984A, Figure 5-3 (32-pin TQFP top view, page 16). Checked 2026-10-01.

• All 32 pin numbers and names match Figure 5-3, the 32-pin TQFP top view on page 16 of Microchip DS40001984A, counter-clockwise from PD3 at pin 1.
• Power pins are complete: VCC on 4 and 6, AVCC on 18, GND on 3, 5, and 21. The TQFP has no exposed pad.
• The datasheet has no recommended land pattern, so the footprint uses standard TQFP pads: 1.50 × 0.55 mm at 0.8 mm pitch, rows 8.40 mm apart. KiCad’s own TQFP-32 footprint uses 1.475 × 0.55 mm pads 8.325 mm apart. Compare against your fab rules before release.

To use the files, add the .kicad_sym under Preferences → Manage Symbol Libraries and put the .kicad_mod in a .pretty folder registered under Manage Footprint Libraries with the nickname ProtoFlow.pretty, which is what the symbol’s Footprint field points to. Review the land pattern against your fab’s rules before ordering boards.

Pin map

ATmega328P-AU pinout