Summary datasheet for the Atmel ATmega48, ATmega88 and ATmega168 family, indicated by the s suffix in the name. At 235 KB the PDF keeps only the essentials: feature overview, pinouts for the available packages, package dimensions and ordering codes. It works well as a bench reference to find VCC, GND, reset, crystal and ISP pins when diagnosing or reprogramming a board built around one of these AVR chips. Full electrical tables and register maps live in the complete datasheet, so consult that for deeper work.
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