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| PartNumber | ATTINY44A-SSF | ATTINY44A-SSFR | ATTINY44A-SS |
| Description | 8-bit Microcontrollers - MCU 4KB FL 256B EE 256B SRAM 20MHz Hi +125C | 8-bit Microcontrollers - MCU 4KB FL 256B EE 256B SRAM 20MHz Hi +125C | |
| Manufacturer | Microchip | Microchip | Atmel |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | Embedded - Microcontrollers |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOIC-14 | SOIC-14 | - |
| Series | ATtiny44 | ATtiny44 | AVRR ATtiny |
| 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 | 4KB (2K x 16) |
| Data RAM Size | 256 B | 256 B | 256 B |
| ADC Resolution | 10 bit | - | 10 bit |
| Number of I/Os | 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 | + 125 C |
| Packaging | Tube | Reel | Tube Alternate Packaging |
| Height | 1.75 mm | 1.75 mm | - |
| Length | 8.74 mm | 8.74 mm | - |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | FLASH |
| Width | 3.99 mm | 3.99 mm | - |
| Brand | 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 | I2C 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 | - | 8 Channel |
| Number of Timers/Counters | 2 Timer | - | - |
| Processor Series | tinyAVR | tinyAVR | tinyAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 57 | 3000 | - |
| Subcategory | 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 | ATTINY |
| Watchdog Timers | Watchdog Timer | - | Watchdog Timer |
| Unit Weight | 0.011923 oz | 0.011923 oz | 0.011923 oz |
| Package Case | - | - | SOIC-14 |
| Operating Temperature | - | - | -40°C ~ 125°C (TA) |
| Supplier Device Package | - | - | 14-SOIC |
| Number of I O | - | - | 12 |
| Speed | - | - | 20MHz |
| EEPROM Size | - | - | 256 x 8 |
| Core Processor | - | - | AVR |
| RAM Size | - | - | 256 x 8 |
| Peripherals | - | - | Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT |
| Connectivity | - | - | USI |
| Voltage Supply Vcc Vdd | - | - | 1.8 V ~ 5.5 V |
| Core Size | - | - | 8-Bit |
| Data Converters | - | - | A/D 8x10b |
| Oscillator Type | - | - | Internal |
| Supply Voltage Max | - | - | 5.5 V |
| Supply Voltage Min | - | - | 1.8 V |
| Number of I Os | - | - | 12 I/O |
| I O Voltage | - | - | 1.8 V to 5.5 V |
| Number of Timers Counters | - | - | 2 Timer |