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| PartNumber | ATMEGA164PA-MCH | ATMEGA164PA-MN | ATMEGA164PA-MCHR |
| Description | 8-bit Microcontrollers - MCU AVR 16KB, 512B EE 1KB SRAM, 5V | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 20MHz Grn | 8-bit Microcontrollers - MCU AVR,16KB FLASH,20MHZ 512B EE,IND TEMP |
| 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 | TQFP-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 |
| Program Memory Size | 16 kB | - | 16 kB |
| Data RAM Size | 1 kB | - | 1 kB |
| ADC Resolution | 10 bit | - | - |
| Number of I/Os | 32 I/O | - | 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 | Tray | Reel |
| Height | 0.88 mm | - | 0.88 mm |
| Length | 5 mm | - | 5 mm |
| Product | MCU | MCU | MCU |
| Program Memory Type | Flash | - | Flash |
| Width | 5 mm | - | 5 mm |
| Brand | Microchip Technology / Atmel | 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, USART | - | 2-Wire, SPI, USART |
| Moisture Sensitive | Yes | Yes | - |
| Number of ADC Channels | 8 | - | - |
| Number of Timers/Counters | 3 Timer | - | 3 Timer |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU |
| Factory Pack Quantity | 490 | 360 | 6000 |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | Microcontrollers - MCU |
| Supply Voltage Max | 5.5 V | - | 5.5 V |
| Supply Voltage Min | 1.8 V | - | 1.8 V |
| Tradename | AVR | AVR | AVR |
| Unit Weight | 0.013051 oz | - | 0.013051 oz |