ATMEGA168-20MU

The ATMEGA168-20MU is an 8-bit AVR microcontroller from Microchip Technology built on the AVR enhanced RISC architecture. The device operates at up to 20MHz, with throughput approaching 20 MIPS, and includes 16KB of Flash memory, 1KB of SRAM, and 512B of EEPROM. It supports in-system self-programming and true read-while-write operation.

This microcontroller provides 23 I/O lines, an 8-channel 10-bit ADC, and a 2-wire serial interface (I2C-compatible), SPI, and a programmable USART. On-chip peripherals include brown-out detection/reset, power-on reset, PWM channels, and a watchdog timer. An internal oscillator enables standalone operation without an external clock source.

The device is packaged in a 32-VFQFN exposed pad package, also designated as 32-VQFN (5x5), for surface-mount assembly. It operates across a temperature range of -40°C to 85°C and accepts a supply voltage from 2.7V to 5.5V. The device is RoHS3 compliant according to the product record.

The combination of moderate memory, multiple serial interfaces, and flexible I/O makes this microcontroller suitable for a range of embedded control applications, including data acquisition, communication bridging, and PWM-based control.