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ATMEGA16U2-AU

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Microchip Tech ATMEL & AVR, TQFP-32(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatmega16u2-aufactory-2.0.0extractor-text

Verified ATMEGA16U2-AU

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier mfr, 32 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATMEGA16U2-AU · TQFP-32(7x7) · 32 pins
  • ✓copper: 32 copper pads, none touching another net
  • ✓datasheet: all 32 pin names found in the 22-page datasheet
  • ✓distributor: lcsc C59019, digikey ATMEGA16U2-AU-ND, mouser 556-ATMEGA16U2-AU
  • ✓family: TQFP-32_7x7mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-xfsmz3bb/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): the datasheet dimensions give no height or body size to compare (datasheet p.14)
  • ✓pads: 32 pins = 32 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 32 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atmega16u2-au.kicad_sym✓ atmega16u2-au.kicad_mod✓ atmega16u2-au.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers atmega16u2-au: viewers · Ray
atmega16u2-au-etched.glb Publish 0.1.0 · Ray
atmega16u2-au-etched.step atmega16u2-au: factory component page (tier=mfr) · Ray
atmega16u2-au-hero.glb atmega16u2-au: hero GLB from the etched model (keeps the MPN mark) · Ray
atmega16u2-au-hero.overlay.json Publish 0.1.0 · Ray
atmega16u2-au.glb Publish 0.1.0 · Ray
atmega16u2-au.kicad_mod Publish 0.1.0 · Ray
atmega16u2-au.kicad_sym Publish 0.1.0 · Ray
atmega16u2-au.lbr Publish 0.1.0 · Ray
atmega16u2-au.step Publish 0.1.0 · Ray
package.json Publish 0.1.1 · Ray
page.json Publish 0.1.1 · Ray
README.md Publish 0.1.0 · Ray
verification.json Verified: Published by the parts factory: tier mfr, 32 pins · Ray

ATMEGA16U2-AU

Microchip Tech · ATMEL & AVR · TQFP-32(7x7)

ATMEGA16U2-AU from Microchip Tech, in a TQFP-32(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 XTAL1 input Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
2 XTAL2/PC0 bidirectional Output from the inverting oscillator amplifier if enabled by fuse; also serves as a generic I/O (PC0).
3 GND power_in Ground.
4 VCC power_in Digital supply voltage.
5 PC2 bidirectional Port C bit 2 I/O with internal pull-up; alternate functions PCINT11 and AIN2.
6 PD0 bidirectional Port D bit 0 I/O with internal pull-up; alternate functions OC.0B and INT0.
7 PD1 bidirectional Port D bit 1 I/O with internal pull-up; alternate functions AIN0 and INT1.
8 PD2 bidirectional Port D bit 2 I/O with internal pull-up; alternate functions RXD1, AIN1 and INT2.
9 PD3 bidirectional Port D bit 3 I/O with internal pull-up; alternate functions TXD1 and INT3.
10 PD4 bidirectional Port D bit 4 I/O with internal pull-up; alternate functions INT5 and AIN3.
11 PD5 bidirectional Port D bit 5 I/O with internal pull-up; alternate functions XCK, AIN4 and PCINT12.
12 PD6 bidirectional Port D bit 6 I/O with internal pull-up; alternate functions RTS, AIN5 and INT6.
13 PD7 bidirectional Port D bit 7 I/O with internal pull-up; alternate functions CTS, HWB, AIN6, T0 and INT7.
14 PB0 bidirectional Port B bit 0 I/O with internal pull-up; alternate functions SS and PCINT0.
15 PB1 bidirectional Port B bit 1 I/O with internal pull-up; alternate functions SCLK and PCINT1.
16 PB2 bidirectional Port B bit 2 I/O with internal pull-up; alternate functions PDI, MOSI and PCINT2.
17 PB3 bidirectional Port B bit 3 I/O with internal pull-up; alternate functions PDO, MISO and PCINT3.
18 PB4 bidirectional Port B bit 4 I/O with internal pull-up; alternate functions T1 and PCINT4.
19 PB5 bidirectional Port B bit 5 I/O with internal pull-up; alternate function PCINT5.
20 PB6 bidirectional Port B bit 6 I/O with internal pull-up; alternate function PCINT6.
21 PB7 bidirectional Port B bit 7 I/O with internal pull-up; alternate functions PCINT7, OC.0A and OC.1C.
22 PC7 bidirectional Port C bit 7 I/O with internal pull-up; alternate functions INT4, ICP1 and CLKO.
23 PC6 bidirectional Port C bit 6 I/O with internal pull-up; alternate functions OC.1A and PCINT8.
24 RESET/PC1/dW bidirectional Reset input (low level longer than minimum pulse length generates a reset), alternatively debugWire channel or generic I/O depending on fuses RSTDISBL and DWEN.
25 PC5 bidirectional Port C bit 5 I/O with internal pull-up; alternate functions PCINT9 and OC.1B.
26 PC4 bidirectional Port C bit 4 I/O with internal pull-up; alternate function PCINT10.
27 UCAP power_out USB pads internal regulator output supply voltage; should be connected to an external 1uF capacitor.
28 UGND power_in USB ground.
29 D+ bidirectional USB Full Speed positive data upstream port.
30 D- bidirectional USB Full Speed negative data upstream port.
31 UVCC power_in USB pads internal regulator input supply voltage.
32 AVCC power_in Supply voltage for analog features (analog comparator, PLL); should be externally connected to VCC through a low-pass filter.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-32(7x7)
Category Embedded Processors & Controllers
Pins 32

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operating voltage (supply range) 2.7 5.5 V Operating voltages, industrial range 1
Operating temperature -40 85 °C Industrial range 1
Maximum frequency 8 MHz At 2.7 V, industrial range 1
Maximum frequency 16 MHz At 4.5 V, industrial range 1

CAD (KiCad official)

  • Symbol: ATMEGA16U2-AU
  • Footprint: Package_QFP:TQFP-32_7x7mm_P0.8mm
  • 3D model: TQFP-32(7x7) (KiCad packages3D, STEP)
  • 3D model files: atmega16u2-au-etched.step / atmega16u2-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega16u2-au.step / atmega16u2-au.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (22 pp, sha256 78639455b8b6b4e8, retrieved 2026-11-05, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF