Introduction
The Atmel® ATtiny4/5/9/10 is a low-power CMOS 8-bit microcontroller based on the AVR® enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny4/5/9/10 achieves throughputs close to 1 MIPS per MHz. This empowers system designer to optimize the device for power consumption versus processing speed.

FEATURE
• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
   – 54 Powerful Instructions
   – Most Single Clock Cycle Execution
   – 16 x 8 General Purpose Working Registers
   – Fully Static Operation
   – Up to 12 MIPS Throughput at 12 MHz
• Non-volatile Program and Data Memories
   – 512/1024 Bytes of In-System Programmable Flash Program Memory
   – 32 Bytes Internal SRAM
   – Flash Write/Erase Cycles: 10,000
   – Data Retention: 20 Years at 85°C / 100 Years at 25°C
• Peripheral Features
   – QTouch® Library Support for Capacitive Touch Sensing (1 Channel)
   – One 16-bit Timer/Counter with Prescaler and Two PWM Channels
   – Programmable Watchdog Timer with Separate On-chip Oscillator
   – 4-channel, 8-bit Analog to Digital Converter (ATtiny5/10, only)
   – On-chip Analog Comparator
• Special Microcontroller Features
   – In-System Programmable (at 5V, only)
   – External and Internal Interrupt Sources
   – Low Power Idle, ADC Noise Reduction, and Power-down Modes
   – Enhanced Power-on Reset Circuit
   – Programmable Supply Voltage Level Monitor with Interrupt and Reset
   – Internal Calibrated Oscillator
• I/O and Packages
   – Four Programmable I/O Lines
   – 6-pin SOT and 8-pad UDFN
• Operating Voltage:
   – 1.8 - 5.5V
• Programming Voltage:
   - 5V
• Speed Grade:
   – 0 - 4 MHz @ 1.8 - 5.5V
   – 0 - 8 MHz @ 2.7 - 5.5V
   – 0 - 12 MHz @ 4.5 - 5.5V
• Industrial and Extended Temperature Ranges
• Low Power Consumption
   – Active Mode:
      • 200μA at 1MHz and 1.8V
     Idle Mode:
      • 25μA at 1MHz and 1.8V
   – Power-down Mode:
      • <0.1μA at 1.8V