This document describes a high-performance, low-power AVR 8-bit microcontroller with advanced RISC architecture, high endurance non-volatile memory, and various peripheral features.
The ATmega325/ATmega3250/ATmega645/ATmega6450 family are low‑power CMOS 8‑bit microcontrollers based on Atmel's AVR enhanced RISC architecture. They deliver up to 16 MIPS at 16 MHz, include on‑chip 2‑cycle multiplier, JTAG interface, and multiple power‑saving modes.
The document details pin‑out diagrams, I/O port descriptions, memory sizes (Flash, EEPROM, SRAM), package options (64‑lead TQFP, 64‑pad QFN/MLF, 100‑lead TQFP), and electrical specifications such as operating voltage ranges, current consumption, temperature range, and ADC capabilities.
| Flash Memory | 32 KB (ATmega325/ATmega3250) / 64 KB (ATmega645/ATmega6450) |
|---|---|
| EEPROM | 1 KB (ATmega325/ATmega3250) / 2 KB (ATmega645/ATmega6450) |
| SRAM | 2 KB (ATmega325/ATmega3250) / 4 KB (ATmega645/ATmega6450) |
| Package Types | 64‑lead TQFP, 64‑pad QFN/MLF, 100‑lead TQFP |
| Operating Voltage / Frequency (V‑rated) | 0‑4 MHz @ 1.8‑5.5 V (V‑rated) ; 0‑8 MHz @ 2.7‑5.5 V (non‑V) |
| Power‑down Current | 100 nA at 1.8 V |
| Temperature Range | -40 °C to 85 °C (Industrial) |
| ADC | 8‑channel, 10‑bit ADC |
The V‑rated devices run from 0 to 4 MHz at 1.8 V to 5.5 V.
Power‑down mode draws 100 nA at 1.8 V.
They are offered in 64‑lead TQFP, 64‑pad QFN/MLF, and 100‑lead TQFP packages.