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| Part Number | ATMEGA161-8AI | ATMEGA163-8AI | ATMEGA161-8PI | ATMEGA161-8AC |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete |
| Core Processor | AVR | AVR | AVR | AVR |
| Core Size | 8-Bit | 8-Bit | 8-Bit | 8-Bit |
| Speed | 8MHz | 8MHz | 8MHz | 8MHz |
| Connectivity | SPI, UART/USART | I²C, SPI, UART/USART | SPI, UART/USART | SPI, UART/USART |
| Peripherals | POR, PWM, WDT | Brown-out Detect/Reset, POR, PWM, WDT | POR, PWM, WDT | POR, PWM, WDT |
| Number of I/O | 35 | 32 | 35 | 35 |
| Program Memory Size | 16KB (8K x 16) | 16KB (8K x 16) | 16KB (8K x 16) | 16KB (8K x 16) |
| Program Memory Type | Flash | Flash | Flash | Flash |
| EEPROM Size | 512 x 8 | 512 x 8 | 512 x 8 | 512 x 8 |
| RAM Size | 1K x 8 | 1K x 8 | 1K x 8 | 1K x 8 |
| Voltage - Supply (Vcc/Vdd) | 4V ~ 5.5V | 4V ~ 5.5V | 4V ~ 5.5V | 4V ~ 5.5V |
| Data Converters | - | A/D 8x10b | - | - |
| Oscillator Type | External | Internal | External | External |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Surface Mount |
| Package / Case | 44-TQFP | 44-TQFP | 40-DIP (0.600", 15.24mm) | 44-TQFP |
| Supplier Device Package | 44-TQFP (10x10) | 44-TQFP (10x10) | 40-PDIP | 44-TQFP (10x10) |
