| PartNumber | ATTINY25-20MF | ATTINY25-20MFR | ATTINY25-20MU |
| Description | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 10 MHZ GRN | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 10 MHZ GRN | 8-bit Microcontrollers - MCU AVR 2K FLASH 128B EE & SRAM USI ADC 5V |
| 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 | SMD/SMT | SMD/SMT |
| Package / Case | MLF-20 | MLF-20 | MLF-20 |
| Series | ATtiny25 | ATtiny25 | ATtiny25 |
| 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 | 2 kB | 2 kB | 2 kB |
| Data RAM Size | 128 B | 128 B | 128 B |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 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 | Tray |
| Height | 0.75 mm | 0.75 mm | 0.75 mm |
| Length | 4 mm | 4 mm | 4 mm |
| Product | MCU | MCU | MCU |
| Width | 4 mm | 4 mm | 4 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | Yes | - |
| Processor Series | tinyAVR | tinyAVR | tinyAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 490 | 6000 | 490 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |
| ADC Resolution | - | - | 10 bit |
| Number of I/Os | - | - | 6 I/O |
| Program Memory Type | - | - | Flash |
| Data RAM Type | - | - | SRAM |
| Data ROM Size | - | - | 128 B |
| Data ROM Type | - | - | EEPROM |
| Interface Type | - | - | USI |
| Number of ADC Channels | - | - | 4 |
| Number of Timers/Counters | - | - | 2 Timer |
| Supply Voltage Max | - | - | 5.5 V |
| Supply Voltage Min | - | - | 2.7 V |
| Unit Weight | - | - | 0.007055 oz |