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ATMEGA1284-AU

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Microchip Tech Microcontroller Units (MCUs/MPUs/SOCs), TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentsingle chip microcomputer-microcontrolleratmega1284-aufactory-2.0.0extractor-text

Verified ATMEGA1284-AU

by Ray · last 13 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

13 Nov 2026RayPublished by the parts factory: tier mfr, 44 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • •array (skip): not an array of element pairs
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: ATMEGA1284-AU · TQFP-44(10x10) · 44 pins
  • ✓copper: 44 copper pads, none touching another net
  • ✓datasheet: all 44 pin names found in the 672-page datasheet
  • ✓distributor: lcsc C618946, digikey ATMEGA1284-AU-ND, mouser 556-ATMEGA1284-AU
  • ✓family: TQFP-44_10x10mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-0zgyj2a4/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.653)
  • ✓pads: 44 pins = 44 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 44 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 57 kB, viewers/symbol.html 30 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atmega1284-au.kicad_sym✓ atmega1284-au.kicad_mod✓ atmega1284-au.step
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ATMEGA1284-AU

Microchip Tech · Microcontroller Units (MCUs/MPUs/SOCs) · TQFP-44(10x10)

ATMEGA1284-AU from Microchip Tech, in a TQFP-44(10x10). 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 PB5 bidirectional Port B bit 5 bidirectional I/O with selectable pull-up; alternate functions MOSI, ICP3 and PCINT13.
2 PB6 bidirectional Port B bit 6 bidirectional I/O with selectable pull-up; alternate functions MISO, OC3A and PCINT14.
3 PB7 bidirectional Port B bit 7 bidirectional I/O with selectable pull-up; alternate functions SCK, OC3B and PCINT15.
4 RESET input Active-low reset input; a low level longer than the minimum pulse length generates a reset even if the clock is not running.
5 VCC power_in Digital supply voltage (1.8 - 5.5V operating range).
6 GND power_in Ground.
7 XTAL2 output Output from the inverting oscillator amplifier.
8 XTAL1 input Input to the inverting oscillator amplifier and to the internal clock operating circuit.
9 PD0 bidirectional Port D bit 0 bidirectional I/O with selectable pull-up; alternate functions RXD0, T3 (ATmega1284/1284P only) and PCINT24.
10 PD1 bidirectional Port D bit 1 bidirectional I/O with selectable pull-up; alternate functions TXD0 and PCINT25.
11 PD2 bidirectional Port D bit 2 bidirectional I/O with selectable pull-up; alternate functions RXD1, INT0 and PCINT26.
12 PD3 bidirectional Port D bit 3 bidirectional I/O with selectable pull-up; alternate functions TXD1, INT1 and PCINT27.
13 PD4 bidirectional Port D bit 4 bidirectional I/O with selectable pull-up; alternate functions XCK1, OC1B and PCINT28.
14 PD5 bidirectional Port D bit 5 bidirectional I/O with selectable pull-up; alternate functions OC1A and PCINT29.
15 PD6 bidirectional Port D bit 6 bidirectional I/O with selectable pull-up; alternate functions OC2B, ICP1 and PCINT30.
16 PD7 bidirectional Port D bit 7 bidirectional I/O with selectable pull-up; alternate functions OC2A and PCINT31.
17 VCC power_in Digital supply voltage (1.8 - 5.5V operating range).
18 GND power_in Ground.
19 PC0 bidirectional Port C bit 0 bidirectional I/O with selectable pull-up; alternate functions SCL (TWI) and PCINT16.
20 PC1 bidirectional Port C bit 1 bidirectional I/O with selectable pull-up; alternate functions SDA (TWI) and PCINT17.
21 PC2 bidirectional Port C bit 2 bidirectional I/O with selectable pull-up; alternate functions TCK (JTAG) and PCINT18.
22 PC3 bidirectional Port C bit 3 bidirectional I/O with selectable pull-up; alternate functions TMS (JTAG) and PCINT19.
23 PC4 bidirectional Port C bit 4 bidirectional I/O with selectable pull-up; alternate functions TDO (JTAG) and PCINT20.
24 PC5 bidirectional Port C bit 5 bidirectional I/O with selectable pull-up; alternate functions TDI (JTAG) and PCINT21.
25 PC6 bidirectional Port C bit 6 bidirectional I/O with selectable pull-up; alternate functions TOSC1 (Timer/Counter2 oscillator) and PCINT22.
26 PC7 bidirectional Port C bit 7 bidirectional I/O with selectable pull-up; alternate functions TOSC2 (Timer/Counter2 oscillator) and PCINT23.
27 AVCC power_in Supply voltage for Port A and the ADC; must be connected to VCC even if the ADC is unused, through a low-pass filter if the ADC is used.
28 GND power_in Ground.
29 AREF input Analog reference pin for the analog-to-digital converter.
30 PA7 bidirectional Port A bit 7 bidirectional I/O with selectable pull-up; alternate functions ADC7 analog input and PCINT7.
31 PA6 bidirectional Port A bit 6 bidirectional I/O with selectable pull-up; alternate functions ADC6 analog input and PCINT6.
32 PA5 bidirectional Port A bit 5 bidirectional I/O with selectable pull-up; alternate functions ADC5 analog input and PCINT5.
33 PA4 bidirectional Port A bit 4 bidirectional I/O with selectable pull-up; alternate functions ADC4 analog input and PCINT4.
34 PA3 bidirectional Port A bit 3 bidirectional I/O with selectable pull-up; alternate functions ADC3 analog input and PCINT3.
35 PA2 bidirectional Port A bit 2 bidirectional I/O with selectable pull-up; alternate functions ADC2 analog input and PCINT2.
36 PA1 bidirectional Port A bit 1 bidirectional I/O with selectable pull-up; alternate functions ADC1 analog input and PCINT1.
37 PA0 bidirectional Port A bit 0 bidirectional I/O with selectable pull-up; alternate functions ADC0 analog input and PCINT0.
38 VCC power_in Digital supply voltage (1.8 - 5.5V operating range).
39 GND power_in Ground.
40 PB0 bidirectional Port B bit 0 bidirectional I/O with selectable pull-up; alternate functions XCK0, T0 and PCINT8.
41 PB1 bidirectional Port B bit 1 bidirectional I/O with selectable pull-up; alternate functions T1, CLKO and PCINT9.
42 PB2 bidirectional Port B bit 2 bidirectional I/O with selectable pull-up; alternate functions AIN0, INT2 and PCINT10.
43 PB3 bidirectional Port B bit 3 bidirectional I/O with selectable pull-up; alternate functions AIN1, OC0A and PCINT11.
44 PB4 bidirectional Port B bit 4 bidirectional I/O with selectable pull-up; alternate functions SS, OC0B and PCINT12.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-44(10x10)
Category Single Chip Microcomputer/Microcontroller
Pins 44

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Input Low Voltage, except XTAL1 and RESET VIL -0.5 0.2 V VCC = 1.8V - 2.4V (max 0.2VCC) 326
Input Low Voltage, except XTAL1 and RESET VIL -0.5 0.3 V VCC = 2.4V - 5.5V (max 0.3VCC) 326
Input Low Voltage, XTAL1 VIL1 -0.5 0.1 V VCC = 1.8V - 5.5V (max 0.1VCC) 326
Input Low Voltage, RESET VIL2 -0.5 0.1 V VCC = 1.8V - 5.5V (max 0.1VCC) 326
Input High Voltage, except XTAL1 and RESET VIH 0.7 V VCC = 1.8V - 2.4V (min 0.7VCC; max VCC + 0.5) 326
Input High Voltage, except XTAL1 and RESET VIH 0.6 V VCC = 2.4V - 5.5V (min 0.6VCC; max VCC + 0.5) 326
Input High Voltage, XTAL1 VIH1 0.8 V VCC = 1.8V - 2.4V (min 0.8VCC; max VCC + 0.5) 326
Input High Voltage, XTAL1 VIH1 0.7 V VCC = 2.4V - 5.5V (min 0.7VCC; max VCC + 0.5) 326
Input High Voltage, RESET VIH2 0.9 V VCC = 1.8V - 5.5V (min 0.9VCC; max VCC + 0.5) 326
Output Low Voltage VOL 0.9 V IOL = 20mA, VCC = 5V 326
Output Low Voltage VOL 0.6 V IOL = 10mA, VCC = 3V 326
Output High Voltage VOH 4.2 V IOH = -20mA, VCC = 5V 326
Output High Voltage VOH 2.3 V IOH = -10mA, VCC = 3V 326
Input Leakage Current I/O Pin, pin low IIL 1 µA VCC = 5.5V, pin low (absolute value) 326
Input Leakage Current I/O Pin, pin high IIH 1 µA VCC = 5.5V, pin high (absolute value) 326
Reset Pull-up Resistor RRST 30 60 kΩ 326
I/O Pin Pull-up Resistor RPU 20 50 kΩ 326
Analog Comparator Input Offset Voltage VACIO 10 40 mV VCC = 5V, Vin = VCC/2 (typ printed <10) 326
Analog Comparator Input Offset Voltage VACIO 15 60 mV VCC < 3.6V, Vin < 0.5V (typ printed <15; max from characterization) 327
Analog Comparator Input Offset Voltage VACIO 15 500 mV VCC > 3.6V, Vin < 0.5V (typ printed <15; max from characterization) 327
Analog Comparator Input Leakage Current IACLK -50 50 nA VCC = 5V, Vin = VCC/2 327
Analog Comparator Propagation Delay tACID 750 ns VCC = 2.7V 327
Analog Comparator Propagation Delay tACID 500 ns VCC = 4.0V 327
Operating temperature -55 125 °C 326
Storage temperature -65 150 °C 326
Voltage on any pin except RESET with respect to ground -0.5 V max VCC + 0.5V 326
Voltage on RESET with respect to ground -0.5 13 V 326
DC current per I/O pin 40 mA 326
Supply voltage range VCC 1.8 5.5 V TA = -40C to 85C 326

CAD (KiCad official)

  • Symbol: ATMEGA1284-AU
  • Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
  • 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: atmega1284-au-etched.step / atmega1284-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega1284-au.step / atmega1284-au.glb are the bare package body.

Provenance

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

  • Datasheet: Microchip Tech datasheet (672 pp, sha256 b5ee49362803dc70, retrieved 2026-11-13, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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