component

ATMEGA644PA-AU

Public Made by Adom

by adom

Microchip Tech ATMEL & AVR, TQFP-44(10x10). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentembedded processors & controllersatmega644pa-aufactory-2.0.0extractor-text

Verified ATMEGA644PA-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: ATMEGA644PA-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 C38349, digikey ATMEGA644PA-AU-ND, mouser 556-ATMEGA644PA-AU
  • ✓family: TQFP-44_10x10mm_P0.8mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-bk09shkf/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 56 kB, viewers/symbol.html 30 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ atmega644pa-au.kicad_sym✓ atmega644pa-au.kicad_mod✓ atmega644pa-au.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
atmega644pa-au / README.md
History Download
Ray Publish 0.1.0 2996f40

ATMEGA644PA-AU

Microchip Tech · ATMEL & AVR · TQFP-44(10x10)

ATMEGA644PA-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 bi-directional I/O with internal pull-up; alternate functions MOSI (SPI), ICP3 and PCINT13.
2 PB6 bidirectional Port B bit 6 bi-directional I/O with internal pull-up; alternate functions MISO (SPI), OC3A and PCINT14.
3 PB7 bidirectional Port B bit 7 bi-directional I/O with internal pull-up; alternate functions SCK (SPI), 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.
6 GND power_in Ground.
7 XTAL2 output Output from the inverting oscillator amplifier.
8 XTAL1 input Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
9 PD0 bidirectional Port D bit 0 bi-directional I/O with internal pull-up; alternate functions RXD0, PCINT24 (T3 only on ATmega1284/1284P).
10 PD1 bidirectional Port D bit 1 bi-directional I/O with internal pull-up; alternate functions TXD0 and PCINT25.
11 PD2 bidirectional Port D bit 2 bi-directional I/O with internal pull-up; alternate functions RXD1, INT0 and PCINT26.
12 PD3 bidirectional Port D bit 3 bi-directional I/O with internal pull-up; alternate functions TXD1, INT1 and PCINT27.
13 PD4 bidirectional Port D bit 4 bi-directional I/O with internal pull-up; alternate functions OC1B, XCK1 and PCINT28.
14 PD5 bidirectional Port D bit 5 bi-directional I/O with internal pull-up; alternate functions OC1A and PCINT29.
15 PD6 bidirectional Port D bit 6 bi-directional I/O with internal pull-up; alternate functions ICP1, OC2B and PCINT30.
16 PD7 bidirectional Port D bit 7 bi-directional I/O with internal pull-up; alternate functions OC2A and PCINT31.
17 VCC power_in Digital supply voltage.
18 GND power_in Ground.
19 PC0 bidirectional Port C bit 0 bi-directional I/O with internal pull-up; alternate functions SCL (TWI) and PCINT16.
20 PC1 bidirectional Port C bit 1 bi-directional I/O with internal pull-up; alternate functions SDA (TWI) and PCINT17.
21 PC2 bidirectional Port C bit 2 bi-directional I/O with internal pull-up; alternate functions TCK (JTAG) and PCINT18.
22 PC3 bidirectional Port C bit 3 bi-directional I/O with internal pull-up; alternate functions TMS (JTAG) and PCINT19.
23 PC4 bidirectional Port C bit 4 bi-directional I/O with internal pull-up; alternate functions TDO (JTAG) and PCINT20.
24 PC5 bidirectional Port C bit 5 bi-directional I/O with internal pull-up; alternate functions TDI (JTAG) and PCINT21.
25 PC6 bidirectional Port C bit 6 bi-directional I/O with internal pull-up; alternate functions TOSC1 (Timer/Counter2 oscillator) and PCINT22.
26 PC7 bidirectional Port C bit 7 bi-directional I/O with internal 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 bi-directional I/O with internal pull-up; ADC7 analog input and PCINT7.
31 PA6 bidirectional Port A bit 6 bi-directional I/O with internal pull-up; ADC6 analog input and PCINT6.
32 PA5 bidirectional Port A bit 5 bi-directional I/O with internal pull-up; ADC5 analog input and PCINT5.
33 PA4 bidirectional Port A bit 4 bi-directional I/O with internal pull-up; ADC4 analog input and PCINT4.
34 PA3 bidirectional Port A bit 3 bi-directional I/O with internal pull-up; ADC3 analog input and PCINT3.
35 PA2 bidirectional Port A bit 2 bi-directional I/O with internal pull-up; ADC2 analog input and PCINT2.
36 PA1 bidirectional Port A bit 1 bi-directional I/O with internal pull-up; ADC1 analog input and PCINT1.
37 PA0 bidirectional Port A bit 0 bi-directional I/O with internal pull-up; ADC0 analog input and PCINT0.
38 VCC power_in Digital supply voltage.
39 GND power_in Ground.
40 PB0 bidirectional Port B bit 0 bi-directional I/O with internal pull-up; alternate functions T0, XCK0 and PCINT8.
41 PB1 bidirectional Port B bit 1 bi-directional I/O with internal pull-up; alternate functions T1, CLKO (divided system clock output) and PCINT9.
42 PB2 bidirectional Port B bit 2 bi-directional I/O with internal pull-up; alternate functions AIN0 (comparator positive input), INT2 and PCINT10.
43 PB3 bidirectional Port B bit 3 bi-directional I/O with internal pull-up; alternate functions AIN1 (comparator negative input), OC0A and PCINT11.
44 PB4 bidirectional Port B bit 4 bi-directional I/O with internal pull-up; alternate functions SS (SPI slave select), OC0B and PCINT12.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package TQFP-44(10x10)
Category Embedded Processors & Controllers
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
Supply voltage VCC 1.8 5.5 V TA = -40°C to 85°C (Table 28-1 header) 326
Speed grade (maximum frequency) 20 MHz ATmega644PA-AU ordering info, 1.8-5.5V; see Speed grades for VCC dependence 649
Operating temperature (Industrial, -AU) TA -40 85 °C Industrial (-40°C to 85°C) ordering range 649
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 Printed maximum is 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
Input Low Voltage, except XTAL1 and RESET pin VIL -0.5 V VCC = 1.8V - 2.4V; printed maximum is 0.2VCC 326
Input Low Voltage, XTAL1 pin VIL1 -0.5 V VCC = 1.8V - 5.5V; printed maximum is 0.1VCC 326
Input Low Voltage, RESET pin VIL2 -0.5 V VCC = 1.8V - 5.5V; printed maximum is 0.1VCC 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 (low) IIL 1 µA VCC = 5.5V, pin low (absolute value) 326
Input Leakage Current I/O 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 40 mV VCC = 5V, Vin = VCC/2 326
Analog Comparator Input Offset Voltage VACIO 60 mV VCC < 3.6V, Vin < 0.5V 327
Analog Comparator Input Offset Voltage VACIO 500 mV VCC > 3.6V, Vin < 0.5V 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

CAD (KiCad official)

  • Symbol: ATMEGA644PA-AU
  • Footprint: Package_QFP:TQFP-44_10x10mm_P0.8mm
  • 3D model: TQFP-44(10x10) (KiCad packages3D, STEP)
  • 3D model files: atmega644pa-au-etched.step / atmega644pa-au-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); atmega644pa-au.step / atmega644pa-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