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| Part Number | ATMEGA161L-4AC |
| Datasheet | ATMEGA161L-4AC datasheet |
| Description | IC MCU 8BIT 16KB FLASH 44TQFP |
| Manufacturer | Microchip Technology |
| Series | AVR® ATmega |
| Part Status | Obsolete |
| Core Processor | AVR |
| Core Size | 8-Bit |
| Speed | 4MHz |
| Connectivity | SPI, UART/USART |
| Peripherals | POR, PWM, WDT |
| Number of I/O | 35 |
| Program Memory Size | 16KB (8K x 16) |
| Program Memory Type | FLASH |
| EEPROM Size | 512 x 8 |
| RAM Size | 1K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 5.5V |
| Data Converters | - |
| Oscillator Type | External |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | Surface Mount |
| Supplier Device Package | 44-TQFP |
| Base Part Number | 44-TQFP (10x10) |