ATtiny85 8-bit AVR RISC-Based Microcontroller - Cover Expand

ATtiny85 8-bit AVR RISC-Based Microcontroller



This 8bit AVR MCU from Atmel is appropriately named the ATtiny85, and is built to offer a high level of functionality with a very tiny form factor.

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While there are many Makers who love to use Arduino Boards, Raspberry Pi SBC’s and other development platforms to create truly exciting projects, there are some Makers who like to go deeper by building their own circuitry without relying on predesigned packages. For these advanced Makers, the ATtiny85 8bit AVR Microcontroller is an amazing little chip, offering a maximum throughput of 20 MIPS at 20MHz, with a near-excessive level of functionality all packed into one of the “Tiny”est IC Packages to date (hence the name), measuring in at around 5x5x2mm in size.

This Tiny chip enables Makers to build their very own development platforms, or integrate advanced functionality into their projects, with a range of very cool features that many other Makers wouldn’t even understand. As such, let’s take a closer look at the complex specifications of this chip, instead of trying to explain the sheer endless number of use cases and applications that Makers like yourself would use the ATtiny85 for.


ATtiny85 8-bit AVR RISC-Based Microcontroller  -  Technical Specifications:

  • Mounting Type

– Surface Mount                                                   

  • Number of Pins

– 8

  • Device Core


  • Instruction Set Architecture


  • Program Memory

– 8KB Flash

  • RAM (Bytes)

– 512

  • EEPROM (Bytes)

– 512

  • Maximum Frequency

– 20MHz

  • Maximum Throughput

– 1 MIPS per 1MHz (20 MIPS @ 20MHz)

  • Data Bus Width

– 8bit

  • Pulse Width Modulation

– 1

  • PWM Channels

– 8

  • PWM Resolution

– 16bit

  • ADC’s

– 1

  • ADC Channels

– 4

  • ADC Resolution

– 10bit

  • Number of SPI Channels

– 1

  • Number of I2C Channels

– 1

  • Number of Timers

– 2

  • Timer Resolution

– 8bit

  • Operating Voltage

– 2.7V to 5.5V

  • Operating Temperatures

– -40° to +85°C

  • Dimensions

– 5.35 x 5.4 x 1.91mm


Typical Applications for ATtiny85 8-bit AVR RISC-Based Microcontroller:

The ATtiny85 8bit AVR Microcontroller is an amazing little component that, because of the open-ended nature of the chip, can be used for an incredibly wide range of applications. And in a similar fashion to an Arduino or similar development board, this IC chip is mostly only limited by your imagination and ability to utilise the vast functionality of it. However, in contrast to Arduino, Raspberry Pi and other development boards, this chip does not have the “training wheels” attached, which of course makes it more difficult to use, but also means that it’s not limited by the predesigned components attached.

So, if you’re feeling adventurous and want to create your very own electronics from scratch, then this chip is an amazing little tool to do just that. However, if this chip seems a bit complicated to you, then you may be more comfortable with using predesigned Development Boards like Arduino, Raspberry Pi or some of the lesser known models like BeagleBone.


Additional Resources:


9ICATINY85SU - Full DSheet

9ICATINY85SU - Datasheet - Full

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9ICATINY85SU - Summarised

9ICATINY85SU - Datasheet - Summarised

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