The Microchip ATMEGA128A-AU is a picoPower 8-bit AVR microcontroller that combines 128 KB of flash with 4 KB of SRAM and 4 KB of EEPROM in a 64-lead TQFP package, operating at up to 16 MHz. It includes a 10-bit ADC, two USARTs, SPI and TWI, plus PWM and multiple timer/counters across a 2.7 V to 5.5 V range. The picoPower design delivers lower current consumption in active and sleep modes, making it a practical core for battery-aware industrial and embedded control.
Key Specifications
| Manufacturer | Microchip Technology |
| Manufacturer Part Number | ATMEGA128A-AU |
| Product Category | 8-bit Microcontrollers – MCU |
| Package / Case | 64-TQFP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C |
| Power Supply | 2.7 V to 5.5 V |
| Program Memory | 128 KB Flash |
| SRAM / EEPROM | 4 KB / 4 KB |
| Maximum Clock | 16 MHz |
| I/O Lines | 53 |
| ADC | 10-bit, 8 channels |
| Interfaces | 2x USART, SPI, TWI (I2C) |
| Lifecycle Status | Active |
| Official Documentation | View official documentation |
Key Features
- 128 KB flash program memory
- picoPower low-power design
- 2.7 V to 5.5 V supply range
- 8-channel 10-bit ADC
- Two USARTs plus SPI and TWI
- 16 MHz maximum clock
- PWM and multiple timer/counters
- Industrial temperature range
Applications
- Battery-aware embedded control
- Industrial automation
- Data acquisition
- Sensor interfaces
- 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 does picoPower mean for the ATmega128A?
The picoPower design reduces active and sleep-mode current consumption, extending battery life in portable systems.
Is the ATmega128A pin-compatible with the ATmega128?
Yes, the ATmega128A is a low-power revision of the ATmega128 in the same 64-lead TQFP package.