embedded-processors-controllers

ATmega8

Full part number: ATmega8A

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This Microchip datasheet covers the ATmega8A, an 8-bit AVR microcontroller with 8KB In-System Programmable Flash. It details the device's architecture, pinouts, and peripheral capabilities for system designers. Key parameters include a supply voltage of 2.7-5.5V, operating speeds up to 16MHz, active current consumption of 3.6mA at 4MHz/3V, and a maximum throughput of 1 MIPS per MHz. The chip features 8KBytes of Flash memory, 512Bytes of EEPROM, and supports five sleep modes for low-power operation.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
supply voltage range 2.7 V — 5.5 V
operating temperature -40 °C — 85 °C
clock frequency — 16 MHz —
cpu speed — 16 MHz —
program memory size — 8.19 kB —
ram size — 1.02 kB —
io count — 23 —
adc resolution — 10 bit —
core size — 8 bit —
03 — Alternatives

Closest matches to ATmega8

ATmega168A 2.0× higher program memory size, 1.2× higher clock frequency, 1.2× higher cpu speed
CH552G 2.0× higher program memory size, 1.5× higher clock frequency, 1.5× higher cpu speed
MSP430F155IPM 2.0× lower clock frequency, 2.0× higher core size, 2.0× lower cpu speed
STM8S003F3 2.0× lower clock frequency, 1.3× lower supply voltage range, similar adc resolution
STM8S105C4 2.0× lower clock frequency, 2.0× higher program memory size, 2.0× higher ram size
STM8S903F3 2.0× lower clock frequency, 1.3× lower supply voltage range, similar adc resolution
nuvoton-tech-ms51fb9ae-t-20ccf6ff2ecfc478 2.0× higher program memory size, 1.5× higher clock frequency, 1.5× higher cpu speed
ATmega32A 4.0× higher program memory size, similar adc resolution, similar clock frequency
04 — 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?

The maximum operating temperature is 85 °C.

What is the program memory size of the ATmega8A?

The program memory size is 8.19 kB.

What is the RAM size of the ATmega8A?

The RAM size is 1.02 kB.

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