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| PartNumber | ATMEGA164PA-AN | ATMEGA164P-A15AZ | ATMEGA164PA |
| Description | 8-bit Microcontrollers - MCU AVR 16KB FL 512B EE 1KB SRAM 20MHz Grn | 8-bit Microcontrollers - MCU AVR 16KB, 512B EE 16MHz 1KB SRAM, 125c | |
| Manufacturer | Microchip | Microchip | Atmel |
| Product Category | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | Embedded - Microcontrollers |
| RoHS | Y | Y | - |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TQFP-44 | TQFP-44 | - |
| Series | ATmega164 | ATmega164P | AVRR ATmega |
| Core | AVR | AVR | AVR |
| Data Bus Width | 8 bit | 8 bit | 8 bit |
| Maximum Clock Frequency | 20 MHz | 16 MHz | 20 MHz |
| Operating Supply Voltage | 1.8 V to 5.5 V | 2.7 V to 5.5 V | 1.8 V to 5.5 V |
| Packaging | Tray | - | Tray Alternate Packaging |
| Product | MCU | MCU | MCU |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Moisture Sensitive | Yes | - | - |
| Processor Series | megaAVR | megaAVR | megaAVR |
| Product Type | 8-bit Microcontrollers - MCU | 8-bit Microcontrollers - MCU | - |
| Factory Pack Quantity | 160 | 1500 | - |
| Subcategory | Microcontrollers - MCU | Microcontrollers - MCU | - |
| Tradename | AVR | AVR | ATMEGA |
| Program Memory Size | - | 16 kB | 16KB (8K x 16) |
| Data RAM Size | - | 1 kB | - |
| Number of I/Os | - | 32 I/O | - |
| Minimum Operating Temperature | - | - 40 C | - |
| Maximum Operating Temperature | - | + 125 C | - |
| Height | - | 1.05 mm | - |
| Length | - | 10 mm | - |
| Program Memory Type | - | Flash | FLASH |
| Width | - | 10 mm | - |
| Data RAM Type | - | SRAM | - |
| Data ROM Size | - | 512 B | - |
| Data ROM Type | - | EEPROM | - |
| Interface Type | - | 2-Wire, JTAG, SPI, USART | - |
| Number of Timers/Counters | - | 3 Timer | - |
| Supply Voltage Max | - | 5.5 V | - |
| Supply Voltage Min | - | 2.7 V | - |
| Package Case | - | - | TQFP-44 |
| Operating Temperature | - | - | -40°C ~ 105°C (TA) |
| Supplier Device Package | - | - | 44-TQFP (10x10) |
| Number of I O | - | - | 32 |
| Speed | - | - | 20MHz |
| EEPROM Size | - | - | 512 x 8 |
| Core Processor | - | - | AVR |
| RAM Size | - | - | 1K x 8 |
| Peripherals | - | - | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | - | - | I2C, SPI, UART/USART |
| Voltage Supply Vcc Vdd | - | - | 1.8 V ~ 5.5 V |
| Core Size | - | - | 8-Bit |
| Data Converters | - | - | A/D 8x10b |
| Oscillator Type | - | - | Internal |