The Microchip ATMEGA128-16AU is an 8-bit AVR microcontroller that delivers 128 KB of flash program memory together with 4 KB of SRAM and 4 KB of EEPROM in a 64-lead TQFP package, running at up to 16 MHz. It provides a 10-bit ADC, two USARTs, SPI and TWI, plus a rich timer and PWM set. The wide 2.7 V to 5.5 V supply range and industrial temperature rating make it a reliable core for embedded control, motor and I/O applications that need a large, established instruction set and long-term availability.
Key Specifications
| Manufacturer | Microchip Technology |
| Manufacturer Part Number | ATMEGA128-16AU |
| Product Category | 8-bit Microcontrollers – MCU |
| Package / Case | 64-TQFP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C |
| Supply Voltage | 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
- 4 KB SRAM and 4 KB EEPROM
- 2.7 V to 5.5 V supply range
- 16 MHz maximum clock
- 8-channel 10-bit ADC
- Two USARTs plus SPI and TWI
- PWM and multiple timer/counters
- Industrial temperature range
Applications
- Industrial control and automation
- Motor and actuator control
- Embedded communication gateways
- Sensor and I/O interfaces
- Legacy system maintenance
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 the -16AU suffix indicate?
The -16 refers to the 16 MHz speed grade, A indicates the TQFP package, and U indicates the industrial temperature range.
Is the ATMEGA128 still available for new designs?
Yes, the ATmega128 remains an active product and is widely used for long-lifecycle industrial equipment.