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The high-performance, low-power Atmel 8-bit AVR RISC-based microcontroller combines 4KB ISP flash memory, 256-Byte EEPROM, 256B 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, USI, internal and external Interrupts, 4-channel 10-bit A/D converter, programmable watchdog timer with internal oscillator, three software selectable power saving modes, and debugWIRE for on-chip debugging. The device achieves a throughput of 20 MIPS at 20 MHz and operates between 2.7-5.5 volts.By executing powerful instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, balancing power consumption and processing speed.


  • 8-bit microcontroller architecture of the AVR family
  • Up to 6 I / O pins available
  • Flash memory 4 kB program
  • S RAM 256 Bytes
  • EEPROM 256 data Bytes
  • external oscillator to 20 MHz
  • 10-bit ADC, 4 channels (or 2 differential channels) and temperature measurement
  • Operating Voltage 2.7 V to 5.5 V
  • 1 timer / counter  8 bits
  • 1 timer / counter 8-bit, high speed and separate prescaler
  • 4-channel PWM
  • USI (Universal Serial Interface) that supports SPI and TWI
  • analog comparator
  • Multiple interrupt sources
  • Configurable internal clock oscillator
  • Brown-out Reset programmable value
  • Power-on Reset
  • Low power modes
  • It supports 10,000 erase cycles / write flash memory
  • Supports 100,000 erase cycles / write EEPROM memory
  • Programmable code protection and data
  • PDIP package 8-pin

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Ex Tax: ₹105.00
  • Stock: 450
  • Model: Attiny45-20PU
  • Weight: 1.50g
  • Location: India

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