embedded processors controllers

ATmega1280

Every spec below is cited to the manufacturer datasheet. Compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the ATmega1280 does

The ATmega640/1280/1281/2560/2561 are 8-bit microcontrollers featuring 64/128/256KB of In-System Programmable Flash, 4KB EEPROM, and 8KB SRAM. These devices operate at speeds up to 16 MHz with a supply voltage range of 1.8V to 5.5V and consume as little as 0.1µA in power-down mode. The family includes variants with 54 to 100 programmable I/O lines, multiple timer/counter units, and up to 12 PWM channels. Engineers typically use these microcontrollers for embedded control applications requiring high performance, low power consumption, and extensive on-chip peripherals like ADCs and USART interfaces. Available in TQFP, CBGA, and QFN packages, they support industrial temperature ranges from -40°C to 85°C.

Next step
Start building with ATmega1280 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
01 — Key specifications

Datasheet parameters

Datasheet parameters for ATmega1280
ParameterMinTypMaxConditionsSource
supply voltage range 1.8 V — 5.5 V Microchip datasheet, p. 1
operating temperature -40 °C — 85 °C Microchip datasheet, p. 1
clock frequency — 16 MHz — Microchip datasheet, p. 1
cpu speed — 16 MHz — Microchip datasheet, p. 1
program memory size — 125 KB — flash Microchip datasheet, p. 7 — Table 2-1. Configuration Summary
ram size — 7.81 KB — ram Microchip datasheet, p. 7 — Table 2-1. Configuration Summary
eeprom size — 3.91 KB — eeprom Microchip datasheet, p. 7 — Table 2-1. Configuration Summary
io count — 86 — Microchip datasheet, p. 7 — Table 2-1. Configuration Summary
adc resolution — 10 bit — Microchip datasheet, p. 1
core size — 8 bit — Microchip datasheet, p. 1
02 — Alternatives

Closest matches to ATmega1280

ATmega128A 2.0× lower ram size, 1.1× higher supply voltage range, similar adc resolution
CC2530F128 2.0× higher cpu speed, 1.9× higher operating temperature, 1.3× lower clock frequency
MSP430F155 15.6× lower ram size, 7.8× lower program memory size, 2.0× lower clock frequency
MSP430F155IPM 15.6× lower ram size, 7.8× lower program memory size, 2.0× lower clock frequency
ATmega168A 8.0× lower program memory size, 8.0× lower ram size, 7.8× lower eeprom size
ATmega48PA 15.6× lower eeprom size, 15.6× lower ram size, 1.2× higher clock frequency
PIC16LF1824 15.6× lower eeprom size, 15.6× lower program memory size, 2.0× higher clock frequency
ATmega32A 3.9× lower program memory size, 3.9× lower ram size, 1.1× higher supply voltage range
03 — FAQ

Frequently asked questions

What is the ADC resolution of the ATmega1280?

The ADC resolution is 10 bit.

What is the maximum clock frequency of the ATmega1280?

The maximum clock frequency is 16 MHz.

What is the core size of the ATmega1280?

The core size is 8 bit.

What is the maximum CPU speed of the ATmega1280?

The maximum CPU speed is 16 MHz.

What is the EEPROM size of the ATmega1280?

The EEPROM size is 3.91 KB.

How many I/O lines does the ATmega1280 have?

The ATmega1280 has 86 I/O lines.

What is the maximum operating temperature for the ATmega1280?

The maximum operating temperature is 85 °C.

What is the program memory size of the ATmega1280?

The program memory size is 125 KB (flash).

What is the RAM size of the ATmega1280?

The RAM size is 7.81 KB.

What is the maximum supply voltage for the ATmega1280?

The maximum supply voltage is 5.5 V.

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