ATMEGA1281-16AU vs ATMEGA2561-16AUR Comparison
Detailed side-by-side comparison of ATMEGA1281-16AU by Microchip Technology and ATMEGA2561-16AUR 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
ATMEGA1281-16AU - 8-Bit AVR MCU 128KB Flash 16MHz | Microchip
ATMEGA1281-16AU ✓ ActiveMicrochip Technology
ATMEGA2561-16AUR - 8-bit AVR MCU 256KB 16MHz | Microchip
ATMEGA2561-16AUR ✓ ActiveSpecification Comparison
| Parameter | ATMEGA1281-16AU | ATMEGA2561-16AUR |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Category | Microcontrollers | Microcontrollers |
| Lifecycle Status | Active | Active |
| Stock Status | In Stock | In Stock |
| Unit Price (USD) | $8.27 | $15.98 |
| Core Architecture | AVR 8-bit RISC | 8-bit AVR RISC |
| Maximum Clock Frequency | 16 MHz | — |
| Flash Memory | 128 KB (64K x 16) ISP FLASH | 256 KB (128K x 16), ISP programmable |
| SRAM | 8 KB (8K x 8) | 8 KB |
| EEPROM | 4 KB (4K x 8) | 4 KB |
| Supply Voltage | 2.7 V to 5.5 V | — |
| I/O Pins | 54 | — |
| ADC | 8-channel 10-bit | 8-channel, 10-bit |
| USARTs | 2 | — |
| Package | 64-TQFP (14 x 14 mm) | 64-TQFP (14 x 14 mm) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40C to +85C | -40C to +85C (industrial) |
| Data Bus Width | 8 Bit | — |
| Oscillator Type | Internal | — |
| Life Cycle Stage | ACTIVE | — |
| RoHS Status | Green / RoHS compliant (per Jotrin: GREEN packaging) | Compliant |
| 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 |
| Serial Interfaces | — | SPI, TWI (I2C-compatible 2-wire) |
| Analog Comparator | — | On-chip, 1 channel |
| Watchdog Timer | — | Programmable, with separate on-chip oscillator |
| Real-Time Counter | — | Yes, with separate oscillator (TOSC1/TOSC2) |
| Pin Change Interrupt | — | Interrupt and wake-up on pin change |