EmbeddedRelated.com
The 2026 Embedded Online Conference
ATMEGA8A-AU

MCHPATMEGA8A-AU

Microchip Technology
AVR AVR® ATmega Microcontroller IC 8-Bit 16MHz 8KB (4K x 16) FLASH 32-TQFP (7x7)
NRND8,886 in stock

Overview

The ATMEGA8A-AU is a high-performance, low-power 8-bit AVR RISC-based microcontroller featuring 8KB of self-programmable Flash memory and 1KB of SRAM. It delivers up to 16 MIPS throughput at 16MHz, balancing efficient processing with a compact 32-pin TQFP surface-mount footprint. The device includes essential integrated peripherals such as a 2-cycle multiplier, multiple sleep modes, and a programmable watchdog timer.

Why Choose This Part

This MCU offers a high endurance memory system with 100,000 EEPROM write cycles and 20-year data retention at 85C. Its advanced RISC architecture executes most instructions in a single clock cycle, providing superior MIPS-per-Watt performance compared to traditional 8-bit architectures.

Applications

Industrial Sensor Interfaces
Utilizing the 23 I/O pins and integrated ADC for monitoring and processing analog sensor signals in factory environments.
Motor Control
Implementing PWM channels for speed and position control in small DC or stepper motor applications.
Handheld Battery-Powered Devices
Leveraging low-power sleep modes, including a 3uA power-down current, to extend battery life in portable electronics.
Legacy System Maintenance
Replacing older ATmega8 series components in existing designs that require the classic AVR architecture with 5V compatibility.

Key Specifications

Speed 16MHz
RAM Size 1K x 8
Core Size 8-Bit
EEPROM Size 512 x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity I2C, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 23
Core Processor AVR
Package / Case 32-TQFP
Data Converters A/D 8x10b
Oscillator Type Internal
Program Memory Size 8KB (4K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-TQFP (7x7)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Develop firmware using the Microchip Studio IDE or the AVR-GCC toolchain. Hardware programming is typically performed via the ISP interface using an AVRISP mkII or MPLAB PICkit 4 programmer. For prototyping, the 32-TQFP package can be used with standard breakout boards or integrated into custom PCBs designed for 2.7V to 5.5V operation.

ATMEGA8A Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package ADC/DAC Stock
ATMEGA8A-AU (this part) TQFP-32 A/D 8x10b 8,886
ATMEGA8A-PU DIP-28 A/D 6x10b 12,633

Also Consider

ATmega328P-AU MCHPMicrochip Technology - Offers increased memory with 32KB Flash and 2KB RAM in the same 32-TQFP pinout for more complex firmware.
ATtiny85-20SU MCHPMicrochip Technology - A much smaller 8-pin alternative if the high I/O count of the ATmega8A is not required for the application.
ATmega88PA-AU MCHPMicrochip Technology - Features picoPower technology for significantly lower power consumption in active and sleep modes.
The 2026 Embedded Online Conference