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ATMEGA8-16MU

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Microchip Tech Pre-ordered MCUs, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatmega8-16mufactory-2.0.0extractor-text

Verified ATMEGA8-16MU

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 33 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATMEGA8-16MU · VQFN-32-EP(5x5) · 33 pins
  • ✓copper: 33 copper pads, none touching another net
  • ✓datasheet: all 33 pin names found in the 12-page datasheet
  • •distributor (warn): no ['mouser'] number
  • ✓family: QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-k_df_hil/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 33 pins = 33 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 33 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atmega8-16mu.kicad_sym✓ atmega8-16mu.kicad_mod✓ atmega8-16mu.step
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Ray Publish 0.1.0 59b3ce8 4d ago

ATMEGA8-16MU

Microchip Tech · Pre-ordered MCUs · VQFN-32-EP(5x5)

ATMEGA8-16MU from Microchip Tech, in a VQFN-32-EP(5x5). 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 PD3 bidirectional Port D bit 3, an I/O pin with internal pull-up whose alternate function is INT1 external interrupt input.
2 PD4 bidirectional Port D bit 4, an I/O pin with internal pull-up whose alternate functions are XCK (USART clock) and T0 (timer clock input).
3 GND power_in Ground.
4 VCC power_in Digital supply voltage, 4.5V-5.5V for ATmega8 (16MHz grade).
5 GND power_in Ground.
6 VCC power_in Digital supply voltage, 4.5V-5.5V for ATmega8 (16MHz grade).
7 PB6 bidirectional Port B bit 6, an I/O pin that, depending on clock fuse settings, is the input to the inverting oscillator amplifier (XTAL1) or TOSC1 for Timer/Counter2.
8 PB7 bidirectional Port B bit 7, an I/O pin that, depending on clock fuse settings, is the output of the inverting oscillator amplifier (XTAL2) or TOSC2 for Timer/Counter2.
9 PD5 bidirectional Port D bit 5, an I/O pin with internal pull-up whose alternate function is T1 (timer clock input).
10 PD6 bidirectional Port D bit 6, an I/O pin with internal pull-up whose alternate function is AIN0 (analog comparator positive input).
11 PD7 bidirectional Port D bit 7, an I/O pin with internal pull-up whose alternate function is AIN1 (analog comparator negative input).
12 PB0 bidirectional Port B bit 0, an I/O pin with internal pull-up whose alternate function is ICP1 (Timer/Counter1 input capture).
13 PB1 bidirectional Port B bit 1, an I/O pin with internal pull-up whose alternate function is OC1A (Timer/Counter1 output compare A).
14 PB2 bidirectional Port B bit 2, an I/O pin with internal pull-up whose alternate functions are SS (SPI slave select) and OC1B.
15 PB3 bidirectional Port B bit 3, an I/O pin with internal pull-up whose alternate functions are MOSI (SPI) and OC2.
16 PB4 bidirectional Port B bit 4, an I/O pin with internal pull-up whose alternate function is MISO (SPI).
17 PB5 bidirectional Port B bit 5, an I/O pin with internal pull-up whose alternate function is SCK (SPI clock).
18 AVCC power_in Analog supply voltage pin for the ADC section.
19 ADC6 input ADC input channel 6, available in the TQFP and QFN/MLF packages.
20 AREF input Analog reference pin for the A/D converter.
21 GND power_in Ground.
22 ADC7 input ADC input channel 7, available in the TQFP and QFN/MLF packages.
23 PC0 bidirectional Port C bit 0, an I/O pin with internal pull-up whose alternate function is ADC0 input.
24 PC1 bidirectional Port C bit 1, an I/O pin with internal pull-up whose alternate function is ADC1 input.
25 PC2 bidirectional Port C bit 2, an I/O pin with internal pull-up whose alternate function is ADC2 input.
26 PC3 bidirectional Port C bit 3, an I/O pin with internal pull-up whose alternate function is ADC3 input.
27 PC4 bidirectional Port C bit 4, an I/O pin with internal pull-up whose alternate functions are ADC4 input and SDA (two-wire interface data).
28 PC5 bidirectional Port C bit 5, an I/O pin with internal pull-up whose alternate functions are ADC5 input and SCL (two-wire interface clock).
29 PC6 bidirectional Active-low RESET input (a low level longer than the minimum pulse length generates a reset) or, if the RSTDISBL fuse is programmed, an I/O pin with electrical characteristics differing from other Port C pins.
30 PD0 bidirectional Port D bit 0, an I/O pin with internal pull-up whose alternate function is RXD (USART receive).
31 PD1 bidirectional Port D bit 1, an I/O pin with internal pull-up whose alternate function is TXD (USART transmit).
32 PD2 bidirectional Port D bit 2, an I/O pin with internal pull-up whose alternate function is INT0 external interrupt input.
33 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package VQFN-32-EP(5x5)
Category Embedded Processors & Controllers
Pins 33

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 supply voltage VCC 4.5 5.5 V ATmega8, 16MHz speed grade 6
Clock frequency (speed grade) 0 16 MHz ATmega8, 4.5 - 5.5V 1
Operating temperature range -40 85 C Industrial, ATmega8-16MU, 32M1-A 6

CAD (KiCad official)

  • Symbol: ATMEGA8-16MU
  • Footprint: Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.3x3.3mm
  • 3D model: VQFN-32-EP(5x5) (KiCad packages3D, STEP)
  • 3D model files: atmega8-16mu-etched.step / atmega8-16mu-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega8-16mu.step / atmega8-16mu.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (12 pp, sha256 77fb79962ad7d629, retrieved 2026-10-31, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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