ATMEGA8A-PU

Overview

The ATMEGA8A-PU is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture, manufactured by Microchip Technology. It features 8K bytes of In-System Programmable Flash, 512 bytes of EEPROM, and 1K byte of SRAM. The device operates within a voltage range of 2.7V to 5.5V and supports clock frequencies up to 16MHz. It includes 23 programmable I/O lines, three Timer/Counters, a 6-channel 10-bit ADC, USART, SPI, and TWI interfaces. The component is housed in a 28-lead PDIP package and functions across an industrial temperature range.

Feature Summary

• Advanced RISC Architecture with single-clock cycle execution for high throughput
• High endurance non-volatile memory segments with read-while-write capabilities
• Integrated capacitive touch sensing support via QTouch library
• Five software selectable power saving modes including idle and power-down

Applications

• Embedded systems requiring efficient power management
• Industrial control applications utilizing multiple communication interfaces
• Consumer electronics employing capacitive touch inputs
• General-purpose microcontroller tasks involving analog signal processing

Procurement Notes

Verify the specific ordering suffix to confirm the PDIP package type and industrial temperature rating. Ensure compatibility with existing PCB footprints designed for 28-pin through-hole components. Confirm that the design lifecycle status meets project requirements, as availability may vary over time.

Selection Notes

Select this model when a robust 8-bit solution with extensive I/O and analog capabilities is required. Consider the PDIP package for prototyping or applications necessitating through-hole mounting. Evaluate the trade-off between processing speed and power consumption using the available sleep modes.

Part Context

This component belongs to the megaAVR family, representing an evolution of earlier AVR designs with enhanced features such as QTouch support. It serves as a versatile core for embedded applications, balancing performance with energy efficiency. The device integrates standard peripherals found in general-purpose microcontrollers while maintaining code compatibility with related series.

Replacement Considerations

Consult official documentation for direct pin-compatible alternatives within the same package. Verify electrical characteristics and memory sizes when substituting with other members of the AVR family.