| PartNumber | ATTINY44A-MF | ATTINY44A-MFR | ATTINY44A-MMH |
| Description | 8-bit Microcontrollers - MCU 4KB FLSH 256B EE256B SRAM-20MHz HI, 125C | 8-bit Microcontrollers - MCU 4KB FLSH 256B EE256B SRAM-20MHz HI, 125C | 8-bit Microcontrollers - MCU 1.8V, 20MHz Industrial Temp |
| 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 | QFN-20 | QFN-20 | VQFN-20 |
| Series | ATtiny44 | ATtiny44 | ATtiny44 |
| 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 | 4 kB | 4 kB | 4 kB |
| Data RAM Size | 256 B | 256 B | 256 B |
| ADC Resolution | 10 bit | - | 10 bit |
| Number of I/Os | 12 I/O | - | 12 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 | + 125 C | + 125 C | + 85 C |
| Packaging | Tray | Reel | Tray |
| Height | 0.8 mm | 0.8 mm | 0.85 mm |
| Length | 4 mm | 4 mm | 3 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 4 mm | 4 mm | 3 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 256 B | - | 256 B |
| Data ROM Type | EEPROM | EEPROM | EEPROM |
| Interface Type | I2C, SPI, USI | SPI, USI | SPI, USI |
| Analog Supply Voltage | - | - | - |
| DAC Resolution | - | - | - |
| I/O Voltage | 1.8 V to 5.5 V | - | - |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 8 Channel | - | 20 |
| 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 | 490 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Supply Voltage Min | 1.8 V | 1.8 V | 1.8 V |
| Tradename | AVR | AVR | AVR |
| Watchdog Timers | Watchdog Timer | - | - |
| Unit Weight | 0.004339 oz | 0.004339 oz | 0.002469 oz |