ATMEGA8A-AU

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ATMEGA8A-AU

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IC MCU 8BIT 8KB FLASH 32TQFP

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Specifications

Attribute Value
Package Bulk
Series AVR® ATmega
ProductStatus Active
CoreProcessor AVR
CoreSize 8-Bit
Speed 16MHz
Connectivity I²C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
NumberofI/O 23
ProgramMemorySize 8KB (4K x 16)
ProgramMemoryType FLASH
EEPROMSize 512 x 8
RAMSize 1K x 8
Voltage-Supply(Vcc/Vdd) 2.7V ~ 5.5V
DataConverters A/D 8x10b
OscillatorType Internal
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 32-TQFP

Overview

Description

The ATmega8A-AU is an 8-bit AVR microcontroller from Microchip (formerly Atmel). It features:
- 8KB Flash memory for program storage.
- 1KB SRAM and 512B EEPROM for data.
- 23 I/O pins, including ADC, PWM, and serial communication (UART, SPI, I2C).
- 16MHz max clock speed (internal or external oscillator).
- Low power consumption, suitable for embedded systems.
Housed in a 32-pin TQFP package, it’s ideal for prototyping and industrial applications. The ATmega8A-AU is widely used in automation, robotics, and DIY projects due to its balance of performance, cost, and ease of programming (via ISP or bootloader).
Key advantages include wide voltage range (2.7–5.5V) and robust peripherals, making it a versatile choice for beginners and professionals.

Features

The ATmega8A-AU is an 8-bit AVR microcontroller with the following key features:
- CPU: 8-bit AVR, up to 16 MHz clock speed.
- Flash Memory: 8 KB (with in-system self-programming).
- SRAM: 1 KB.
- EEPROM: 512 bytes.
- I/O Pins: 23 programmable (6-channel 10-bit ADC, 3 PWM channels).
- Communication: USART, SPI, I²C (TWI).
- Timers: Two 8-bit (Timer0 & Timer2) and one 16-bit (Timer1).
- Power Efficiency: Low-power idle, power-down, and ADC noise reduction modes.
- Operating Voltage: 2.7V–5.5V.
- Package: 32-pin TQFP.
- Debugging: On-chip debug (OCD) via JTAG.
Ideal for embedded control, automation, and hobbyist projects.

Pinout

The ATMEGA8A-AU is a 28-pin microcontroller in a TQFP package. Key functions include:
- I/O Pins: 23 programmable I/O pins (Ports B, C, D).
- Analog Inputs: 6 ADC channels (10-bit).
- Communication: USART, SPI, and I²C (TWI).
- Timers: Three timers (two 8-bit, one 16-bit).
- PWM: 4 channels.
- Memory: 8KB Flash, 1KB SRAM, 512B EEPROM.
- Clock: Up to 16MHz (internal/external).
Pins also support power (VCC, GND), reset (RESET), and AREF for ADC reference.

Application

The ATmega8A-AU is a versatile 8-bit microcontroller used in various applications:
- Embedded Systems: Control systems, automation, and DIY projects.
- Consumer Electronics: Appliances, toys, and remote controls.
- Industrial Automation: Sensor interfacing, motor control, and monitoring.
- Automotive: Basic control units, dashboard systems.
- IoT & Wearables: Low-power sensor nodes and simple smart devices.
- Robotics: Small robot controllers and servo management.
- Hobbyist Projects: Arduino-compatible boards (e.g., Arduino Pro Mini).
Its 8KB Flash, 1KB RAM, and 23 I/O pins make it ideal for cost-sensitive, low-complexity tasks.

Package

The ATMEGA8A-AU comes in a TQFP-32 package. This is a 32-pin Thin Quad Flat Package with a 7x7mm body size and 0.8mm pin pitch. It is surface-mountable, suitable for compact PCB designs, and provides good thermal and electrical performance. The "-AU" suffix indicates the TQFP package type.

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