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| PartNumber | ATMEGA168-20MQ | ATMEGA168-20MQR | ATMEGA168-20MI |
| Description | 8-bit Microcontrollers - MCU AVR 16K FLSH 512B EE 1K SRAM ADC 5V | 8-bit Microcontrollers - MCU AVR 16K FLASH,ADC EXT TEMP,5V | IC MCU 8BIT 16KB FLASH 32VQFN |
| Manufacturer | Microchip | Microchip | - |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | MLF-32 | QFN-32 | - |
| Series | ATmega168 | ATmega168 | - |
| Core | AVR | AVR | - |
| Data Bus Width | 8 bit | 8 bit | - |
| Maximum Clock Frequency | 20 MHz | 20 MHz | - |
| Program Memory Size | 16 kB | 16 kB | - |
| Data RAM Size | 1 kB | 1 kB | - |
| Number of I/Os | 23 I/O | 23 I/O | - |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Reel | - |
| Height | 0.85 mm | 0.85 mm | - |
| Length | 7 mm | 7 mm | - |
| Product | MCU | MCU | - |
| Program Memory Type | Flash | Flash | - |
| Width | 7 mm | 7 mm | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Data RAM Type | SRAM | SRAM | - |
| Data ROM Size | 512 B | 512 B | - |
| Data ROM Type | EEPROM | EEPROM | - |
| Interface Type | 2-Wire, SPI, Serial, USART | 2-Wire, SPI, Serial, USART | - |
| Moisture Sensitive | Yes | - | - |
| Number of Timers/Counters | 3 Timer | 3 Timer | - |
| Processor Series | megaAVR | megaAVR | - |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 490 | 6000 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 2.7 V | 2.7 V | - |
| Tradename | AVR | AVR | - |
| Unit Weight | - | 0.006653 oz | - |