The Microchip ATMEGA128A-MU is a picoPower 8-bit AVR microcontroller in a 64-lead QFN package, providing 128 KB of flash with 4 KB of SRAM and 4 KB of EEPROM. It includes a 10-bit ADC, two USARTs, SPI and TWI, and operates up to 16 MHz, making it a compact, low-power core for industrial and battery-aware embedded systems.
Key Specifications
| Manufacturer | Microchip Technology |
| Exact Manufacturer Part Number | ATMEGA128A-MU |
| Product Category | 8-bit Microcontrollers – MCU |
| Series / Family | ATmega128A |
| Package / Case | 64-QFN |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C |
| Power Supply | 2.7 V to 5.5 V |
| Program Memory | 128 KB |
| SRAM | 4 KB |
| EEPROM | 4 KB |
| Maximum Clock | 16 MHz |
| I/O Lines | 53 |
| ADC | 10-bit, 8 channels |
| Interfaces | 2x USART, SPI, TWI |
| Lifecycle Status | Active |
| Official Documentation | View official documentation |
Key Features
- 128 KB flash program memory
- picoPower low-power design
- 64-lead QFN package
- 2.7 V to 5.5 V supply range
- 8-channel 10-bit ADC
- Two USARTs plus SPI and TWI
Applications
- Industrial control
- Battery-aware embedded systems
- Data acquisition
- Communication gateways
Sourcing
Availability, lead time, date code and commercial terms are subject to confirmation at the time of quotation.
Quality
CHIPER sources brand-new, unused components and provides quality inspection, shortage and long lead-time sourcing, and one-stop BOM procurement. Every part is verified before shipment.
FAQ
What package does the ATMEGA128A-MU use?
It comes in a 64-lead QFN package, a compact alternative to the TQFP version.
Is the ATmega128A a low-power device?
Yes, its picoPower design reduces active and sleep-mode current consumption.