Overview

The ATtiny25/45/85 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 ATtiny25/45/85 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

• 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 Byte of In-System ProgrammableProgram Memory Flash (ATtiny25/45/85)

• Endurance: 10,000 Write/Erase Cycles

– 128/256/512 Bytes In-System ProgrammableEEPROM (ATtiny25/45/85)

• Endurance: 100,000 Write/Erase Cycles

– 128/256/512 Bytes InternalSRAM (ATtiny25/45/85)

– 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

– Universal Serial Interface with Start Condition Detector

– 10-bit ADC

• 4 Single Ended Channels

• 2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

• Special Microcontroller Features

– debugWIRE 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-onReset Circuit

– Programmable Brown-out Detection Circuit

– Internal Calibrated Oscillator

• I/O and Packages

– Six Programmable I/O Lines

– 8-pin SOIC

– 20-pin QFN

• Operating Voltage

– 2.7 - 5.5V for ATtiny25/45/85

• Speed Grade

– ATtiny25/45/85: 0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V

• Automotive Temperature Range

– -40°C to +125°C

• Low Power Consumption

– Active Mode:

• 1 MHz, 2.7V: 300µA

– Power-down Mode:

• 0.2µA at 2.7V