ATMEGA8A-MUR

Overview

The ATMEGA8A-MUR is an 8-bit AVR microcontroller featuring a 32-VQFN (5x5) package. It includes 8KB of In-System Programmable Flash, 512 bytes of EEPROM, and 1K byte of SRAM. The device operates at speeds up to 16MHz with a supply voltage range of 2.7V to 5.5V. It integrates 23 programmable I/O lines, an 8-channel 10-bit ADC, three PWM channels, SPI, USART, and TWI interfaces.

Feature Summary

• Supports capacitive touch sensing via Microchip QTouch library for buttons, sliders, and wheels.
• Enables true read-while-write operation allowing code execution while flash memory is being reprogrammed.
• Provides five software-selectable power-saving modes including Idle, Power-down, and Standby.

Applications

• Embedded systems requiring low-power CMOS processing
• Applications utilizing capacitive touch user interfaces
• Systems needing in-system self-programmable flash capabilities

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 32-VQFN configuration. Confirm that the selected variant meets all required electrical specifications for the target operating environment.

Selection Notes

Select this component when a compact surface-mount solution is required for 8-bit control tasks. The VQFN package offers space efficiency compared to leaded alternatives. Consider the internal oscillator accuracy and available I/O count relative to system requirements before finalizing the design.

Part Context

This part belongs to the megaAVR family produced by Microchip Technology. It utilizes the high-performance AVR RISC architecture to achieve near 1 MIPS per MHz throughput. The device is designed for applications balancing processing speed with low power consumption needs.

Replacement Considerations

Consult official documentation for direct pin-compatible substitutes within the same series. Verify memory sizes and peripheral availability when considering alternative models from the megaAVR lineup.

FAQ

Does the ATMEGA8A-MUR support capacitive touch sensing?

Yes, the device supports Microchip QTouch library features for acquiring data from capacitive touch buttons, sliders, and wheels.

What is the maximum clock frequency for this microcontroller?

The ATMEGA8A-MUR supports a maximum throughput of 16 MIPS at an operating frequency of 16MHz.