| PartNumber | ATMEGA16A-AUR | ATMEGA16A-AU | ATMEGA16A-MU |
| Description | 8-bit Microcontrollers - MCU AVR LCD 16KB FLSH EE 512B 1KB SRAM-16MHZ | 8-bit Microcontrollers - MCU 16KB In-system Flash 2.7V - 5.5V | 8-bit Microcontrollers - MCU 16KB In-system Flash 2.7V - 5.5V |
| 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 | TQFP-44 | TQFP-44 | MLF-44 |
| Series | ATmega16A | ATmega16A | ATmega16A |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 16 MHz | 16 MHz | 16 MHz |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Packaging | Reel | Tray | Tray |
| Product | MCU | MCU | MCU |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | - | - |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 2000 | 160 | 360 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.009640 oz | 0.077179 oz | 0.004864 oz |
| Program Memory Size | - | 16 kB | 16 kB |
| Data RAM Size | - | 1 kB | 1 kB |
| Number of I/Os | - | 32 I/O | 32 I/O |
| Minimum Operating Temperature | - | - 40 C | - 40 C |
| Maximum Operating Temperature | - | + 85 C | + 85 C |
| Height | - | 1 mm | 0.88 mm |
| Length | - | 10 mm | 7 mm |
| Program Memory Type | - | Flash | Flash |
| Width | - | 10 mm | 7 mm |
| Data RAM Type | - | SRAM | SRAM |
| Data ROM Size | - | 512 B | 512 B |
| Data ROM Type | - | EEPROM | EEPROM |
| Interface Type | - | 2-Wire, SPI, USART | 2-Wire, SPI, USART |
| Number of Timers/Counters | - | 3 Timer | 3 Timer |
| Supply Voltage Max | - | 5.5 V | 5.5 V |
| Supply Voltage Min | - | 2.7 V | 2.7 V |