| PartNumber | ATTINY861A-MU | ATTINY861A-MUR | ATTINY861A-PU |
| Description | 8-bit Microcontrollers - MCU 8K Flash;125B EEPROM 128B SRAM;16 IO Pins | 8-bit Microcontrollers - MCU AVR 8KB FLSH 512B EE 512B SRAM-20MHz, IND | 8-bit Microcontrollers - MCU 8K Flash;512B EEPROM 512B SRAM;16 IO Pins |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | - | Through Hole |
| Package / Case | QFN-32 | VQFN-32 | PDIP-20 |
| Series | ATtinyx61A | ATtinyx61A | ATtinyx61A |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Program Memory Size | 8 kB | 8 kB | 8 kB |
| Data RAM Size | 512 B | 512 B | 512 B |
| ADC Resolution | 10 bit | 10 bit | - |
| Number of I/Os | 16 I/O | 16 I/O | 16 I/O |
| Operating Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Packaging | Tray | Reel | Tube |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 512 B | 512 B | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | I2C, SPI | I2C, SPI | SPI |
| Analog Supply Voltage | - | - | - |
| DAC Resolution | - | - | - |
| I/O Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | - |
| Number of ADC Channels | 11 Channel | 11 Channel | - |
| Number of Timers/Counters | 2 Timer | 2 Timer | - |
| Processor Series | tinyAVR | tinyAVR | tinyAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 490 | 6000 | 18 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 1.8 V | 1.8 V | - |
| Tradename | AVR | AVR | AVR |
| Watchdog Timers | Watchdog Timer | Watchdog Timer | - |
| Unit Weight | 0.006653 oz | 0.002145 oz | 0.079719 oz |