The Microchip ATMEGA1284P-MU is an 8-bit AVR microcontroller in a compact 44-pad QFN package, offering the same 128 KB flash, 16 KB SRAM and 4 KB EEPROM as its TQFP sibling in a smaller footprint. It operates from 1.8 V to 5.5 V at up to 20 MHz and includes a 10-bit ADC, multiple serial interfaces and PWM outputs. The reduced board area makes it a practical choice for space-constrained embedded systems that still need substantial program memory and peripheral integration.
Key Specifications
| Manufacturer | Microchip Technology |
| Manufacturer Part Number | ATMEGA1284P-MU |
| Product Category | 8-bit Microcontrollers – MCU |
| Package / Case | 44-VQFN (7 mm x 7 mm, exposed pad) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +85°C |
| Supply Voltage | 1.8 V to 5.5 V |
| Program Memory | 128 KB Flash |
| SRAM / EEPROM | 16 KB / 4 KB |
| Maximum Clock | 20 MHz |
| I/O Lines | 32 |
| ADC | 10-bit, 8 channels |
| Interfaces | 2x USART, SPI, TWI (I2C), JTAG |
| Lifecycle Status | Active |
| Official Documentation | View official documentation |
Key Features
- 128 KB in-system self-programmable flash
- Compact 44-pad QFN package
- 16 KB SRAM and 4 KB EEPROM
- 1.8 V to 5.5 V operating range
- 8-channel 10-bit ADC
- SPI, TWI, USART and JTAG interfaces
- Low-power sleep modes
- Watchdog timer and brown-out detection
Applications
- Space-constrained embedded systems
- Portable instrumentation
- Industrial control modules
- Sensor data acquisition
- Consumer electronics
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
Is the QFN package pin-compatible with the TQFP version?
Pin assignments are equivalent across package options, but the QFN uses an exposed pad that should be tied to ground.
What clock source does the ATMEGA1284P use?
It supports an internal calibrated oscillator as well as an external crystal or resonator for higher-accuracy timing.