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ATMEGA8A-PU

8-bit AVR MCU, 8KB Flash, 1KB SRAM, 16MHz, PDIP-28, Arduino-compatible

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Manufacturer Part：

ATMEGA8A-PU

Package：

PDIP-28 / PU-28 (36.7 x 8.89 mm, 2.54mm pitch, through-hole)

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Description

Product Overview

The ATMEGA8A-PU from Microchip Technology (formerly Atmel) is an 8-bit AVR RISC microcontroller with 8KB ISP Flash, 1KB SRAM, and 512B EEPROM in a PDIP-28 through-hole package. Running at up to 16MHz at 5V, it features 6-channel 10-bit ADC, two 8-bit and one 16-bit timer, USART, SPI, and I2C interfaces.

Key Specifications

Core 8-bit AVR RISC
Max Clock Frequency 16 MHz
Flash Memory 8 KB (ISP programmable)
SRAM 1 KB
EEPROM 512 Bytes
I/O Pins 23
ADC 6-channel 10-bit (PDIP package)
Timers 2 x 8-bit + 1 x 16-bit
Communication USART, SPI (master/slave), I2C
PWM Channels 3
Supply Voltage 2.7V to 5.5V (ATmega8A)
Active Current 3.6 mA @ 5V, 4MHz
Power-Down Current 1 uA @ 3V
Operating Temperature -40 to 85 C
Package PDIP-28 (PU suffix)

Features

  • High-performance 8-bit AVR RISC architecture
  • 130 powerful instructions, most single-clock cycle execution
  • 8KB ISP Flash with 10,000 erase/write cycles
  • 512B EEPROM with 100,000 erase/write cycles
  • 1KB internal SRAM
  • Up to 16 MIPS throughput at 16MHz
  • 6-channel 10-bit ADC
  • USART, SPI, and Two-Wire (I2C) serial interfaces
  • Programmable watchdog timer with on-chip oscillator
  • On-chip analog comparator
  • Dual programmable serial USART
  • Master/slave SPI serial interface
  • Calibrated internal RC oscillator

Applications

  • Arduino and hobbyist projects
  • Industrial control and automation
  • Motor control and drive systems
  • Sensor data acquisition
  • Consumer electronics and home appliances

The ATMEGA8A-PU from Microchip is an 8-bit AVR RISC microcontroller in PDIP-28 with 8KB ISP Flash, 1KB SRAM, and 512B EEPROM. Runs at up to 16MHz with 16 MIPS throughput. Features 6-channel 10-bit ADC, USART, SPI, I2C, and three timers (2×8-bit + 1×16-bit). 23 I/O pins with PDIP-28 through-hole package ideal for prototyping and Arduino-compatible designs. 2.7-5.5V supply with only 1uA power-down current.

The ATmega8A uses the AVR enhanced RISC architecture with 130 instructions, most executing in a single clock cycle. The Harvard architecture separates program memory (Flash) and data memory (SRAM) with separate buses, enabling simultaneous instruction fetch and data access. The 16-bit program counter addresses the 8KB Flash. Peripherals are memory-mapped into the I/O space and accessed via IN/OUT instructions or direct addressing. The 10-bit SAR ADC uses successive approximation with auto-triggering from timer compare matches. ISP (In-System Programming) allows Flash and EEPROM programming via the SPI interface without removing the device from the circuit. The A suffix version operates from 2.7-5.5V at 0-16MHz.

Pin Name Alt Function Function
1 PC6 RESET# Reset input (active low)
2 PD0 RXD Port D bit 0 / USART receive
3 PD1 TXD Port D bit 1 / USART transmit
4 PD2 INT0 Port D bit 2 / External interrupt 0
5 PD3 INT1/OC2 Port D bit 3 / Ext interrupt 1 / Timer2 PWM
6 PD4 T0/XCK Port D bit 4 / Timer0 clock / USART clock
7 VCC – Digital supply voltage
8 GND – Ground
9 PB6 XTAL1/TOSC1 Port B bit 6 / Crystal oscillator input
10 PB7 XTAL2/TOSC2 Port B bit 7 / Crystal oscillator output
11-17 PD5-PD7, PB0-PB3 Various Port D/B with timer/PWM/SPI/ADC
18-24 PC0-PC6 ADC0-ADC5/SCL/SDA Port C with ADC and I2C
25-28 ADC6,ADC7,PB4,PB5 ADC, SPI ADC inputs and SPI
  • Arduino-compatible prototyping board with PDIP-28 socket
  • Motor speed controller with PWM and ADC feedback
  • Temperature monitoring and control with I2C sensors
  • RS-232 serial communication bridge via USART
  • Home automation sensor node with SPI radio
Manufacturer Part Number Package Notes
Microchip ATMEGA328P-PU PDIP-28 32KB Flash, pin-compatible upgrade
Microchip ATMEGA8A-AU TQFP-32 SMD version with 2 extra ADC channels
Microchip ATMEGA48A-PU PDIP-28 4KB Flash, lower cost alternative
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Quality Assurance

Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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2. Strict Full-batch Quality Inspection

We implement 100% full-batch quality control for all goods before shipment. Our professional QC team conducts multi-dimensional tests including appearance inspection, electrical parameter testing, performance verification and packaging check. Each batch of components is attached with complete inspection reports and batch records. We stick to zero-tolerance standards for defective products to ensure every piece of component meets industrial application requirements.

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China

 

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Contact Information

Email: info@materialparts.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

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Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@materialparts.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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