AVR ATtiny Family ATtiny28 Series Microcontrollers 8-bit Microcontrollers:

The ATtiny28 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny28 achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general-purpose working registers.

• AVR core, Up to 4 MIPS Throughput at 4 MHz
• Flash: 2KB.
• Interrupt and Wake-up on Low-level Input
• Programmable Watchdog Timer with On-chip Oscillator
• 11 Programmable I/O Lines
• Built-in High-current LED Driver with Programmable Modulation
• 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
• On-chip Analog Comparator
• 8-bit Timer/Counter with Separate Prescaler
• Applications: Power Regulators,Rectification, and DAC applications