4-Bit/8-Bit MCU

The ATtiny45 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 ATtiny45 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

• High Performance, Low Power AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
  • 120 Powerful Instructions Most Single Clock Cycle Execution
  • 32 x 8 General Purpose Working Registers
  • Fully Static Operation
• Non-volatile Program and Data Memories
  • 2/4/8K Bytes of In-System Programmable Program Memory Flash
  • Endurance: 10,000 Write/Erase Cycles
  • 128/256/512 Bytes In-System Programmable EEPROM
  • Endurance: 100,000 Write/Erase Cycles
  • 128/256/512 Bytes Internal SRAM
  • Programming Lock for Self-Programming Flash Program and EEPROM Data Security
• Peripheral Features
  • 8-bit Timer/Counter with Prescaler and Two PWM Channels
  • 8-bit High Speed Timer/Counter with Separate Prescaler
  • 2 High Frequency PWM Outputs with Separate Output Compare Registers
  • Programmable Dead Time Generator
  • USI - Universal Serial Interface with Start Condition Detector
  • 10-bit ADC
  • 4 Single Ended Channels
  • 2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
  • Temperature Measurement
  • Programmable Watchdog Timer with Separate On-chip Oscillator
  • On-chip Analog Comparator
• Special Microcontroller Features
  • debug WIRE On-chip Debug System
  • In-System Programmable via SPI Port
  • External and Internal Interrupt Sources
  • Low Power Idle, ADC Noise Reduction, and Power-down Modes
  • Enhanced Power-on Reset Circuit
  • Programmable Brown-out Detection Circuit
  • Internal Calibrated Oscillator
• I/O and Packages
  • Six Programmable I/O Lines
  • 8-pin PDIP, 8-pin SOIC, 20-pad QFN/MLF, and 8-pin TSSOP (only ATtiny45/V)
• Operating Voltage
  • 2.7 - 5.5V for ATtiny45
• Speed Grade
  • ATtiny45: 0 - 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 - 5.5V
• Industrial Temperature Range
• Low Power Consumption
  • Active Mode: 1 MHz, 1.8V: 300 µA
  • Power-down Mode: 0.1 µA at 1.8V