AVR ATtiny Family ATtiny25 Series Microcontrollers 8-bit Microcontrollers:

The high-performance Microchip picoPower AVR RISC-based CMOS 8-bit microcontroller combines 2KB ISP flash memory, 128B EEPROM, 128B SRAM, 6 general purpose I/O lines, 32 general purpose working registers, one 8-bit timer/counter with compare modes, one 8-bit high speed timer/counter, universal serial interface (USI), internal and external interrupts, 4-channel 10-bit A/D converter.

• 8-Bit Timer/Counter with Prescaler and Two PWM Channels
• EEPROM: Upto 128B, RAM: Upto 128B
• Interfaces: USI, SPI
• 10-Bit ADC
• 6x General Purpose Input Output Pins
• Low Power Idle, ADC Noise Reduction, and Power-down Modes
• Programmable Watchdog Timer with Separate On-chip Oscillator
• External and Internal Interrupt Sources
• In-System Programmable via SPI Port
• Applications: Power Regulators, Inverters, Toys, Motor Control