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Availability: Advance Info



2K Bytes of In-System Self-Programmable Flash, 128 Bytes In-System Programmable EEPROM, 128 Bytes Internal SRAM. Two 8-bit timer/counters with PWM and prescaler, 10-bit ADC, USI-Universal Serial Interface. debugWIRE for on-chip-debug. Up to 20 MIPS throughput at 20 MHz. 2.7 - 5.5 V operation. Also available in 1.8 Volts version. 8KB version: ATtiny85 4KB version: ATtiny45


  • pin and feature compatible with tiny45, less memory.
  • pin and feature compatible with tiny85, less memory.

Overview features

Flash EEPROM SRAM Speed Volts
2kB 128B 128B 0 - 20MHz 2.7 - 5.5V



General package info

  8-pin SOIC 8-pin PDIP 20-lead MLF
Package Lead Code 8 8 20
Carrier Type TUBE TUBE  
Max Package Height 2.15   .8
Body Thickness 1.82 3.30 3.30
Body Width 5.30 7.62 4.00
Body Length   9.27 4.00
Units per Carrier 95 50 0
Carriers per Bag 100 40 0
Units per Bag 9500 2000 0
Quantity per Reel 2000 0 0
Tape Pitch 12    
Tape Width 16    
Downloadable Files pdf Package Drawing
pdf Tube Tray Drawing
pdf Carrier Tape Drawing
pdf Reel Drawing
pdf Package Drawing
pdf Tube Tray Drawing
pdf Datasheet
pdf Package Drawing
Other features Tools
Flash Memory 2 kB
EEPROM Data Memory 128 B
SRAM Data Memory 128 B
General Purpose Registers (Accumulators) 32
MCU Specific
Clock Frequency 0 - 20 MHz
Supply Voltage 2.7 - 5.5 V
Sleep Modes 3
I/O Pins 6
On Chip Oscillator Yes
Interrupts 15
Interrupts, External pins 7
Interrupt or Wake-up on Pin Change Yes
Brown-out Detection Yes
Power-on Reset Yes
Fully Static Operation Yes
DebugWIRE On-chip debug system Yes
Timers / Counters
Timer/Counters (8-bit) 2
Watchdog Timer with On-chip Oscillator Yes
Pulse Width Modulator 2 ch
Analog I/O
Analog Comparator Yes
Analog-to-Digital Converter (10-bit) 4 ch
Programming Modes
In-System Programming via SPI Port Yes
High Voltage Parallel Programming (12V) Yes
Self-Programming via on-chip Boot Program Yes
Serial I/O
2-wire Serial Interface (I2C compatible) Yes
Universal Serial Interface Yes
DebugWIRE Enable Yes