atmega644 datasheet - SERP Analysis

https://ww1.microchip.com/downloads/en/DeviceDoc/doc2593.pdf

https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ProductDocuments/DataSheets/2593S.pdf

https://www.alldatasheet.com/datasheet-pdf/pdf/175195/ATMEL/ATMEGA644.html

https://www.mouser.com/ProductDetail/Microchip-Technology/ATMEGA644-20PU?qs=8jWQYweyg6OtmZV4EMC1iQ%3D%3D&srsltid=AfmBOooqYTDMmKQdwX2_BSYb4cchgc2XZcwNAdyQR93y-w6iQgDQ9sXv

https://www.onlinecomponents.com/en/datasheet/atmega64420au-49534164/?srsltid=AfmBOooes5Dz6LKfDw1DSIyj4ySvPe2zCclvd7oWzqkekaG9649C8Fd4

https://www.futurlec.com/Atmel/ATMEGA644-20PU.shtml

https://www.alldatasheet.com/view.jsp?Searchword=ATMEGA644&sField=2

https://www.radiolocman.com/datasheet/data.html?di=505975&/ATmega644

https://www.mouser.com/ProductDetail/Microchip-Technology/ATMEGA644-20MU?qs=8jWQYweyg6M9k41jtSSGcg%3D%3D&srsltid=AfmBOop5jdFEYG-wOEX4KKvGX4OC0sDZzFHkI3TTXBsAYMn-43KpQcPV

https://www.digikey.com/en/products/detail/microchip-technology/ATMEGA644-20PU/1008673

https://datasheet4u.com/share_search.php?sWord=ATMEGA644

https://www.digchip.com/datasheets/parts/datasheet/2/295/ATMEGA644.php

https://www.avrfreaks.net/s/topic/a5C3l000000UDr7EAG/t067059

https://www.rlocman.ru/datasheet/pdf.html?di=149347&p=1&srsltid=AfmBOoq4bqmV7j1aUPhU_epWptp1lnFCxOtxn9t1zapI6xJX0lq9lF_Y

https://datasheet4u.com/datasheet/ATMEL-Corporation/ATMEGA644-579130

https://www.futurlec.com/Atmel/ATMEGA64.shtml

https://docs.arduino.cc/hardware/uno-rev3

https://ru.elcodis.com/parts/5816439/ATmega644_dt765776_p331.html

https://www.microchipdirect.com/product/ATMEGA644-20AUR?srsltid=AfmBOopz_WYT-WOBusTa41KxIbJlupvweBzy-h0VPyDKQLBngereBmed

https://www.radiolocman.com/datasheet/pdf.html?di=149347

https://www.lcsc.com/datasheet/lcsc_datasheet_2206211730_Microchip-Tech-ATMEGA644-20AU_C1337213.pdf

https://www.aipcba.com/datasheet/pdf/atmega644paau-cm589608.html

https://docs.arduino.cc/hardware/nano

https://www.reddit.com/r/arduino/comments/1lh2508/which_arduino_microprocessor_can_collect_ad_data/

https://www.aipcba.com/datasheet/pdf/atmega64420mur-cm105431688.html

https://www.chipdip.ru/product/atmega644-20pu

https://ickala.com/downloads/1458/atmega644.html?srsltid=AfmBOoqV3z4iVmQyABSCF4I_H75llDUo89BTduCLms5-Oo21YyiCvjJR

https://hackaday.com/2025/06/21/measurement-is-science/

https://www.reddit.com/r/AskElectronics/comments/1lj8qkc/how_to_switch_a_180vdc_line_using_an_arduino_nano/

https://docs.rs-online.com/87d9/0900766b815965bc.pdf

https://www.scribd.com/document/507168287/IR-Sensor-B-696-Manual

https://www.chipdip.ru/product0/8002979363

https://www.reichelt.de/de/de/shop/produkt/8-bit-atmega_avr_mikrocontroller_64_kb_20_mhz_dip-40-68173

https://www.eeworld.com.cn/mcu/hisic487724.html

https://docs.rs-online.com/93ed/0900766b815e2ef5.pdf

https://datasheet.eeworld.com.cn/view/69021087.html

https://datasheet.octopart.com/ATMEGA64L8MU-Atmel-datasheet-7595363.pdf

https://buybestelectronic.com/part-image/8498/datasheet/8498.pdf