Product Overview
The ATMEGA168PA-AU is a Microchip 8-bit AVR picoPower microcontroller with 16KB Flash, 1KB SRAM, and 512B EEPROM. 20MHz operation. 10-bit ADC. USART, SPI, I2C interfaces. The (20014798C) denotes lot/date code traceability. TQFP-32 package. Widely used in Arduino projects.
Key Specifications
| Type | 8-bit AVR Microcontroller |
| Core | AVR (picoPower) |
| Flash | 16 KB |
| SRAM | 1 KB |
| EEPROM | 512 B |
| Clock | 20 MHz |
| ADC | 10-bit 6-ch (PDIP) / 8-ch (TQFP) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Interface | USART, SPI, I2C, 6 PWM |
| Supply Voltage | 1.8V to 5.5V |
| Operating Temp | -40 to +85C |
| Package | TQFP-32 |
Working Principle
The ATmega168PA uses the AVR enhanced RISC architecture with 131 instructions, most executing in a single clock cycle. The picoPower technology reduces power consumption in active and all sleep modes by clock-gating unused peripherals and optimizing the clock tree. The 3-stage pipeline (fetch-decode-execute) achieves 1 MIPS/MHz. The 16-bit Timer1 supports input capture, output compare, PWM, and frequency generation. The USART supports full-duplex asynchronous serial. Self-programming flash enables bootloader operation.
Applications
- Arduino projects
- Embedded control
- Sensor nodes
- Consumer electronics