| PartNumber | ATMEGA64-16AU | ATMEGA64-16AI | ATMEGA64-16AC |
| Description | 8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 54 I/O Pins | 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC | 8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| RoHS | Y | N | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-64 | TQFP-64 | TQFP-64 |
| Series | ATmega64 | ATmega64 | ATmega64 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz |
| Program Memory Size | 64 kB | 64 kB | 64 kB |
| Data RAM Size | 4 kB | 4 kB | 4 kB |
| Number of I/Os | 53 I/O | 53 I/O | 53 I/O |
| Operating Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | 0 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 70 C |
| Packaging | Tray | - | - |
| Height | 1 mm | 1 mm | 1 mm |
| Length | 14 mm | 14 mm | 14 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | Flash | Flash |
| Width | 14 mm | 14 mm | 14 mm |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | SRAM | SRAM |
| Data ROM Size | 2 kB | 2 kB | 2 kB |
| Data ROM Type | EEPROM | EEPROM | EEPROM |
| Interface Type | 2-Wire, JTAG, SPI, USART | 2-Wire, JTAG, SPI, USART | 2-Wire, JTAG, SPI, USART |
| Moisture Sensitive | Yes | - | Yes |
| Number of Timers/Counters | 4 Timer | 2 Timer | 2 Timer |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 90 | 90 | 90 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V, 5.8 V | 5.5 V, 5.8 V | 5.5 V, 5.8 V |
| Supply Voltage Min | 4.2 V, 4.5 V | 4.2 V, 4.5 V | 4.2 V, 4.5 V |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.012720 oz | 0.012720 oz | 0.012720 oz |