embedded processors controllers

ATmega8

Full part number: ATmega8A

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 ATmega8 does

The ATmega8A is an 8-bit microcontroller featuring 8KB of in-system programmable Flash, 512 bytes of EEPROM, and 1KB of internal SRAM. It operates on a 2.7 to 5.5V supply with clock speeds up to 16MHz, consuming as little as 0.5µA in power-down mode. This device includes three PWM channels, an 8-channel ADC, and multiple serial interfaces including USART and SPI. Available in 28-lead PDIP, 32-lead TQFP, and 32-pad QFN/MLF packages, it supports five sleep modes to optimize power consumption. The ATmega8A is typically used in applications requiring low-power operation combined with high-performance processing, such as embedded control systems, consumer electronics, and industrial automation devices where cost-effective, flexible microcontroller solutions are needed.

Next step
Start building with ATmega8 → 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 ATmega8
ParameterMinTypMaxConditionsSource
supply voltage range 2.7 V — 5.5 V Microchip datasheet, p. 1
operating temperature -40 °C — 85 °C Industrial Microchip datasheet, p. 7 — 7. Ordering Information
clock frequency — 16 MHz — Microchip datasheet, p. 1
cpu speed — 16 MHz — Microchip datasheet, p. 1
program memory size — 7.81 KB — Microchip datasheet, p. 1
ram size — 1 kB — Microchip datasheet, p. 1
io count — 23 — Microchip datasheet, p. 1
adc resolution — 10 bit — Microchip datasheet, p. 1
core size — 8 bit — Microchip datasheet, p. 1
02 — Alternatives

Closest matches to ATmega8

ATmega168A 2.0× higher program memory size, 1.2× higher clock frequency, 1.2× higher cpu speed
ATmega48PA 2.0× lower program memory size, 2.0× lower ram size, 1.2× higher clock frequency
CC1110F16RHHR 2.0× higher program memory size, 2.0× higher ram size, 1.6× higher clock frequency
CH552G 2.0× higher program memory size, 1.5× higher clock frequency, 1.5× higher cpu speed
MS51FB9AE-T 2.0× higher program memory size, 1.5× higher clock frequency, 1.5× higher cpu speed
STM8L051F3P6 2.0× lower clock frequency, 1.5× lower supply voltage range, 1.2× higher adc resolution
STM8S003F3 2.0× lower clock frequency, similar supply voltage range, similar adc resolution
STM8S903F3 2.0× lower clock frequency, similar supply voltage range, similar adc resolution
03 — FAQ

Frequently asked questions

What is the ADC resolution of the ATmega8A?

The ADC resolution is 10 bit.

What is the maximum clock frequency for the ATmega8A?

The maximum clock frequency is 16 MHz.

What is the core size of the ATmega8A?

The core size is 8 bit.

What is the maximum CPU speed of the ATmega8A?

The maximum CPU speed is 16 MHz.

How many I/O pins does the ATmega8A have?

The ATmega8A has 23 I/O pins.

What is the maximum operating temperature for the ATmega8A under industrial conditions?

The maximum operating temperature is 85 °C.

What is the program memory size of the ATmega8A?

The program memory size is 7.81 KB.

What is the RAM size of the ATmega8A?

The RAM size is 1 kB.

What is the maximum supply voltage for the ATmega8A?

The maximum supply voltage is 5.5 V.

Design help What do I need around the ATmega8? →