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| PartNumber | ATTINY261-20MU | ATTINY261-20 | ATTINY261-20MUR |
| Description | 8-bit Microcontrollers - MCU AVR 2K FLSH 128B EE 128B SRAM ADC 5V | IC MCU 8BIT 2KB FLASH 32VQFN | |
| Manufacturer | Microchip | Atmel | Atmel |
| Product Category | 8-bit Microcontrollers - MCU | Embedded - Microcontrollers | Embedded - Microcontrollers |
| RoHS | Y | - | - |
| Mounting Style | SMD/SMT | - | - |
| Package / Case | MLF-32 | - | - |
| Series | ATtinyx61 | AVRR ATtiny | AVRR ATtiny |
| Core | AVR | - | - |
| Data Bus Width | 8 bit | - | - |
| Maximum Clock Frequency | 20 MHz | - | - |
| Program Memory Size | 2 kB | 2KB (1K x 16) | 2KB (1K x 16) |
| Data RAM Size | 128 B | - | - |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 16 I/O | - | - |
| Operating Supply Voltage | 2.7 V to 5.5 V | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 85 C | - | - |
| Height | 0.88 mm | - | - |
| Length | 5 mm | - | - |
| Product | MCU | - | - |
| Program Memory Type | Flash | FLASH | FLASH |
| Width | 5 mm | - | - |
| Brand | Microchip Technology / Atmel | - | - |
| Data RAM Type | SRAM | - | - |
| Data ROM Size | 128 B | - | - |
| Data ROM Type | EEPROM | - | - |
| Interface Type | 2-Wire, SPI, USI | - | - |
| Moisture Sensitive | Yes | - | - |
| Number of ADC Channels | 11 | - | - |
| Number of Timers/Counters | 2 Timer | - | - |
| Processor Series | tinyAVR | - | - |
| Product Type | 8-bit Microcontrollers - MCU | - | - |
| Factory Pack Quantity | 490 | - | - |
| Subcategory | Microcontrollers - MCU | - | - |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 2.7 V | - | - |
| Tradename | AVR | - | - |
| Packaging | - | Tray | Digi-ReelR |
| Package Case | - | 32-VFQFN Exposed Pad | 32-VFQFN Exposed Pad |
| Operating Temperature | - | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Supplier Device Package | - | 32-VQFN (5x5) | 32-VQFN (5x5) |
| Number of I O | - | 16 | 16 |
| Speed | - | 20MHz | 20MHz |
| EEPROM Size | - | 128 x 8 | 128 x 8 |
| Core Processor | - | ||
| RAM Size | - | 128 x 8 | 128 x 8 |
| Peripherals | - | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | - | USI | USI |
| Voltage Supply Vcc Vdd | - | 2.7 V ~ 5.5 V | 2.7 V ~ 5.5 V |
| Core Size | - | 8-Bit | 8-Bit |
| Data Converters | - | A/D 11x10b | A/D 11x10b |
| Oscillator Type | - | Internal | Internal |