ATMEGA2561-16AUR vs ATMEGA1281-16AU Comparison
Detailed side-by-side comparison of ATMEGA2561-16AUR by Microchip Technology and ATMEGA1281-16AU by Microchip Technology. Compare key specifications, electrical parameters, packaging, lifecycle status, pricing, and availability to determine the best component for your design requirements.
Microchip Technology
ATMEGA2561-16AUR - 8-bit AVR MCU 256KB 16MHz | Microchip
ATMEGA2561-16AUR ✓ ActiveMicrochip Technology
ATMEGA1281-16AU - 8-Bit AVR MCU 128KB Flash 16MHz | Microchip
ATMEGA1281-16AU ✓ ActiveSpecification Comparison
| Parameter | ATMEGA2561-16AUR | ATMEGA1281-16AU |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Core Architecture | 8-bit AVR RISC | AVR 8-bit RISC |
| Flash Memory | 256 KB (128K x 16), ISP programmable | 128 KB (64K x 16) ISP FLASH |
| SRAM | 8 KB | 8 KB (8K x 8) |
| EEPROM | 4 KB | 4 KB (4K x 8) |
| Maximum CPU Speed | 16 MHz | — |
| Throughput | 16 MIPS at 16 MHz | — |
| Operating Voltage Range | 4.5 V to 5.5 V | — |
| General Purpose I/O | 54 I/O lines | — |
| Working Registers | 32 general purpose registers | — |
| Timer/Counters | Six flexible timer/counters with compare modes and PWM | — |
| USART | Four programmable serial USART | — |
| ADC | 8-channel, 10-bit | 8-channel 10-bit |
| Serial Interfaces | SPI, TWI (I2C-compatible 2-wire) | — |
| Analog Comparator | On-chip, 1 channel | — |
| Watchdog Timer | Programmable, with separate on-chip oscillator | — |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C |
| Package | 64-TQFP (14 x 14 mm) | 64-TQFP (14 x 14 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| Real-Time Counter | Yes, with separate oscillator (TOSC1/TOSC2) | — |
| Pin Change Interrupt | Interrupt and wake-up on pin change | — |
| RoHS Status | Compliant | Green / RoHS compliant (per Jotrin: GREEN packaging) |
| Maximum Clock Frequency | — | 16 MHz |
| Supply Voltage | — | 2.7 V to 5.5 V |
| I/O Pins | — | 54 |
| USARTs | — | 2 |
| Data Bus Width | — | 8 Bit |
| Oscillator Type | — | Internal |
| Life Cycle Stage | — | ACTIVE |