embedded processors controllers

ATmega128A

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 ATmega128A does

The ATmega128A is a high-performance, low-power 8-bit microcontroller based on the AVR enhanced RISC architecture. It features 128KBytes of In-System Self-programmable Flash, 4KBytes of EEPROM, and 4KBytes of Internal SRAM. Operating at speeds up to 16MHz with a supply voltage of 2.7 to 5.5V, the device delivers up to 16MIPS throughput. It includes extensive peripherals such as two 8-bit timers, an 8-channel 10-bit ADC, and dual USARTs. The ATmega128A supports six sleep modes for power saving and offers 53 programmable I/O lines in 64-lead TQFP or 64-pad QFN packages. This microcontroller is designed for applications requiring optimized power consumption versus processing speed, utilizing its advanced RISC architecture to execute powerful instructions in a single clock cycle.

Next step
Start building with ATmega128A → 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 ATmega128A
ParameterMinTypMaxConditionsSource
supply voltage range 2.7 V — 5.5 V Microchip datasheet, p. 1
operating temperature -40 °C — 85 °C Microchip datasheet, p. 15 — 7.1 ATmega128A
clock frequency — 16 MHz — Microchip datasheet, p. 1
cpu speed — 16 MHz — Microchip datasheet, p. 1
program memory size — 125 KB — Microchip datasheet, p. 1
ram size — 3.91 KB — Microchip datasheet, p. 1
io count — 53 — 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 ATmega128A

ATmega1280 2.0× higher ram size, 1.1× lower supply voltage range, similar adc resolution
ATmega32A 3.9× lower program memory size, 2.0× lower ram size, similar adc resolution
STM8L052C6 3.9× lower program memory size, 2.0× lower clock frequency, 2.0× lower ram size
STM8S105C4 7.8× lower program memory size, 2.0× lower clock frequency, 2.0× lower ram size
ATmega328PB 3.9× lower program memory size, 2.0× lower ram size, 1.2× higher cpu speed
CC1110F16RHHR 8.0× lower program memory size, 2.0× lower ram size, 1.6× higher clock frequency
CC2530F128 2.0× higher cpu speed, 2.0× higher ram size, 1.9× higher operating temperature
MSP430F155 7.8× lower program memory size, 7.8× lower ram size, 2.0× lower clock frequency
03 — FAQ

Frequently asked questions

What is the ADC resolution of the ATmega128A?

The ADC resolution is 10 bit.

What is the maximum clock frequency for the ATmega128A?

The maximum clock frequency is 16 MHz.

What is the core size of the ATmega128A?

The core size is 8 bit.

What is the maximum CPU speed of the ATmega128A?

The maximum CPU speed is 16 MHz.

How many I/O pins does the ATmega128A have?

The ATmega128A has 53 I/O pins.

What is the maximum operating temperature for the ATmega128A?

The maximum operating temperature is 85 °C.

What is the program memory size of the ATmega128A?

The program memory size is 125 KB.

What is the RAM size of the ATmega128A?

The RAM size is 3.91 KB.

What is the maximum supply voltage for the ATmega128A?

The maximum supply voltage is 5.5 V.

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