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ATMEGA8A-AU

8-bit AVR MCU, 8KB Flash, 1KB SRAM, 512B EE, 16MHz, 23 I/O, TQFP-32

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Manufacturer Part：

ATMEGA8A-AU

Package：

TQFP-32 (7 x 7 x 1.0mm)

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Description

Product Overview

The ATMEGA8A-AU from Microchip Technology is a low-power CMOS 8-bit AVR RISC microcontroller with 8KB ISP Flash, 512B EEPROM, and 1KB SRAM in a TQFP-32 package. Operating at up to 16MHz with 2.7V to 5.5V supply, it features 23 I/O pins, 8-channel 10-bit ADC, and multiple communication interfaces including USART, SPI, and TWI.

Key Specifications

Flash Memory 8KB
SRAM 1KB
EEPROM 512B
Clock Speed Up to 16MHz
I/O Pins 23
ADC 8-channel 10-bit (TQFP/QFN)
Communication USART, SPI, TWI (I2C)
Timers 2x 8-bit, 1x 16-bit
Supply Voltage 2.7V to 5.5V
Package TQFP-32 (7 x 7mm)
Operating Temperature -40°C to +85°C

Features

  • 130 powerful instructions, most single-clock cycle
  • 32 x 8 general purpose working registers
  • Up to 16 MIPS throughput at 16MHz
  • On-chip 2-cycle multiplier
  • 8KB ISP Flash with read-while-write
  • True read-while-write operation via boot program
  • 3 PWM channels
  • Programmable watchdog timer with on-chip oscillator
  • 5 software selectable power saving modes
  • QTouch library support for capacitive touch

Applications

  • Embedded control in consumer electronics
  • Motor speed and position control
  • Sensor interface and data acquisition
  • Home automation devices
  • USB interface peripherals

The ATMEGA8A-AU from Microchip Technology is a low-power CMOS 8-bit AVR RISC-based microcontroller featuring 8KB of in-system programmable Flash with read-while-write capabilities, 512B EEPROM, and 1KB SRAM. With 23 general purpose I/O lines, three flexible timer/counters, internal and external interrupts, a serial programmable USART, a byte-oriented TWI interface, 8-channel 10-bit ADC, and an SPI serial port, it provides a highly flexible and cost-effective solution for many embedded control applications.

The ATMEGA8A uses the AVR enhanced RISC architecture with 130 instructions, most executing in a single clock cycle. The 32 general-purpose registers are directly connected to the ALU, enabling two independent registers to be accessed in one instruction cycle. The Flash memory is divided into application and boot sections, with the boot section supporting read-while-write operation for self-programming. Five sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby) allow fine-grained power management. The calibrated internal RC oscillator provides a default clock source without external components.

Pin Name Type Function
1 PD3/INT1 I/O Port D pin 3 / External interrupt 1
2 PD4 I/O Port D pin 4 / XCK
3 GND Power Ground
4 VCC Power Digital supply voltage
5 GND Power Ground
6 AVCC Power ADC supply voltage
7 AREF Reference ADC reference
8-15 PB0-PB7 I/O Port B: SPI/Timer/ADC/XTAL
16-23 PC0-PC7 I/O Port C: ADC/TWI/RESET
24-28 PD0-PD4 I/O Port D: USART/INT/Timer
29-32 PD5-PD7 I/O Port D: Timer/PWM/AIN
  • Consumer electronics embedded controllers
  • Motor drive and position feedback systems
  • Temperature and pressure sensor interfaces
  • Home automation sensor nodes
  • USB peripheral device controllers
Manufacturer Part Number Package Notes
Microchip ATMEGA8A-PU PDIP-28 Through-hole version
Microchip ATMEGA8A-MU QFN-32 Same specs, QFN package
Microchip ATMEGA16A-AU TQFP-44 16KB Flash upgrade
Microchip ATtiny88-AU TQFP-32 8KB Flash, pin-compatible
ST STM8S003F3P6 TSSOP-20 8-bit alternative, 8KB Flash
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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