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| Part Number | ATMEGA324P-20MU | ATMEGA324P-20PU | ATMEGA324P-20MUR | ATMEGA325P-20MU | ATMEGA324P-20AU | ATMEGA324P-20MCU | ATMEGA324P-20MQ |
|---|---|---|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Active | Active | Active | Active | Active | Obsolete | Active |
| Core Processor | AVR | AVR | AVR | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 20MHz | 20MHz | 20MHz | 20MHz | 20MHz | 20MHz | 20MHz |
| Connectivity | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART | SPI, UART/USART, USI | I²C, SPI, UART/USART | I²C, SPI, UART/USART | I²C, SPI, UART/USART |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT |
| Number of I/O | 32 | 32 | 32 | 54 | 32 | 32 | 32 |
| Program Memory Size | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) | 32KB (16K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash | Flash | Flash | Flash |
| EEPROM Size | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 |
| RAM Size | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Data Converters | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b | A/D 8x10b |
| Oscillator Type | Internal | Internal | Internal | Internal | Internal | Internal | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 105°C (TA) |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 44-VFQFN Exposed Pad | 40-DIP (0.600", 15.24mm) | 44-VFQFN Exposed Pad | 64-VFQFN Exposed Pad | 44-TQFP | 44-VQFN Dual Rows, Exposed Pad | 44-VFQFN Exposed Pad |
| Supplier Device Package | 44-VQFN (7x7) | 40-PDIP | 44-VQFN (7x7) | 64-QFN (9x9) | 44-TQFP (10x10) | 44-QFN (5x5) | 44-VQFN (7x7) |
