| PartNumber | ATMEGA164A-MU | ATMEGA164A-MCH | ATMEGA164A-MCHR |
| Description | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM-20 MHz | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM-20 MHz | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM-20 MHz |
| 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-44 | QFN-44 | QFN-44 |
| Series | ATmega164 | ATmega164 | ATmega164 |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz |
| Operating Supply Voltage | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| Packaging | Tray | Tray | Reel |
| Product | MCU | MCU | MCU |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 360 | 490 | 6000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.013051 oz | 0.013051 oz | 0.013051 oz |
| Moisture Sensitive | - | Yes | - |