| PartNumber | ATMEGA164PA-AU | ATMEGA164PA-ANR | ATMEGA164PA-AN |
| Description | 8-bit Microcontrollers - MCU AVR 16KB 512B EE 20MHz 1KB SRAM 125c | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 20 MHZ GRN | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 20MHz Grn |
| 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 | TQFP-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 |
| Program Memory Size | 16 kB | 16 kB | - |
| Data RAM Size | 1 kB | 1 kB | - |
| Number of I/Os | 32 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 | - |
| Maximum Operating Temperature | + 85 C | + 85 C | - |
| Packaging | Tray | Reel | Tray |
| Height | 1.05 mm | - | - |
| Length | 10.1 mm | - | - |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | - | - |
| Width | 10.1 mm | - | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Data RAM Type | SRAM | - | - |
| Data ROM Size | 512 B | - | - |
| Data ROM Type | EEPROM | - | - |
| Interface Type | 2-Wire, SPI, USART | - | - |
| Moisture Sensitive | Yes | - | Yes |
| Number of Timers/Counters | 3 Timer | - | - |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 160 | 2000 | 160 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | - | - |
| Supply Voltage Min | 1.8 V | - | - |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.077179 oz | - | - |