ATMEGA8A-ANR

Overview

The ATMEGA8A-ANR is an 8-bit AVR microcontroller from Microchip Technology, utilizing the megaAVR architecture. It features 8KB of in-system programmable Flash memory, 512 bytes of EEPROM, and 1KB of SRAM. The device operates on a supply voltage ranging from 2.7V to 5.5V with a maximum clock frequency of 16MHz. It includes 23 programmable I/O lines, an 8-channel 10-bit ADC (specific to TQFP/VQFN packages), three PWM channels, USART, SPI, and TWI interfaces. The component is housed in a 32-lead TQFP package and supports industrial temperature ranges.

Feature Summary

• Advanced RISC architecture enabling single-clock cycle execution for high throughput efficiency
• Integrated non-volatile memory segments including self-programmable Flash and EEPROM
• Supports capacitive touch sensing via Microchip QTouch library compatibility
• Multiple software-selectable power-saving modes to optimize energy consumption

Applications

• Embedded systems requiring low-power 8-bit processing
• Industrial control applications within specified temperature ranges
• Consumer electronics utilizing capacitive touch interfaces
• Battery-powered devices leveraging multiple sleep modes

Procurement Notes

Verify the specific ordering suffix 'ANR' against official Microchip documentation to confirm package type and temperature grade. Ensure the selected variant matches the required PCB footprint and environmental operating conditions. Cross-reference the datasheet revision history for any errata or updates relevant to production units.

Selection Notes

Select this component when an 8-bit AVR core with integrated Flash and EEPROM is required. Consider the 32-TQFP package dimensions for board layout constraints. Evaluate the 16MHz performance limit against system timing requirements. Confirm that the 2.7V to 5.5V supply range aligns with the target application's power design.

Part Context

This part belongs to the ATmega8A family within the megaAVR series. It shares core architectural features with other variants in the series but differs in packaging and specific peripheral channel counts depending on the physical form factor. The 'A' designation typically indicates an enhanced version of the original ATmega8.

Replacement Considerations

Consult Microchip's official obsolescence notices for status changes. Verify pin-to-pin compatibility if substituting with other ATmega8A variants. Review updated datasheets for potential feature additions in successor models.