AVR ATtiny Family ATtiny4 Series Microcontrollers 8-bit Microcontrollers:

The high-performance, low-power Microchip 8-bit AVR RISC-based microcontroller combines 1KB ISP flash memory, 32B SRAM, four general purpose I/O lines, 16 general purpose working registers, programmable watchdog timer with internal oscillator, an internal calibrated oscillator, a 4-channel/8-bit A/D converter, and four software selectable power saving modes.

• On-chip Analog Comparator
• FLASH: Upto 1024B, SRAM: Upto 32B
• One 16-Bit Timer/Counter with Prescaler and Two PWM Channels
• Upto 4-Channel, 10-Bit ADC(ATtiny5/10, only)
• Programmable Watchdog Timer with Separate On-chip Oscillator
• 4x General Purpose Input Output Pins
• External and Internal Interrupt Sources
• Low Power Idle, ADC Noise Reduction, and Power-down Modes
• Internal Calibrated Oscillator
• Applications: Power Regulators, Inverters, Toys, Motor Control