Key facts
- Brand
- Atmel
- Model
- ATTINY85
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2012-03-27
Start here
ATMEL ATtiny25/V * ATtiny45/V ATtiny85/V * * Preliminary handbook
The ATtiny25/45/85 is a low‑power CMOS 8‑bit microcontroller based on Atmel's enhanced RISC AVR architecture. It offers 2/4/8 KB of flash, up to 512 B of EEPROM, 512 B of SRAM, six programmable I/O lines, a 10‑bit ADC, and multiple timer/counter modules, making it suitable for compact, power‑sensitive designs.
This handbook details the device's features, pin‑out diagrams for PDIP, SOIC and QFN/MLF packages, CPU core architecture, register set, and programming guidelines. It also includes code examples, resource links, and reliability information such as data‑retention and endurance specifications.
Atmel ATTINY85 specifications
| Operating Voltage | 1.8 – 5.5 V (ATtiny25/45/85V) / 2.7 – 5.5 V (ATtiny25/45/85) |
|---|---|
| Flash Memory | 2 KB / 4 KB / 8 KB |
| EEPROM | 128 B / 256 B / 512 B |
| EEPROM Endurance | 100,000 write/erase cycles |
| SRAM | 128 B / 256 B / 512 B |
| Programmable I/O Lines | 6 |
| Timer/Counter | 8‑bit Timer/Counter with Prescaler and Two PWM Channels |
| ADC | 10‑bit |
| Package Types | 8‑pin PDIP, 8‑pin SOIC, 20‑pad QFN/MLF |
| Speed Grade | 0‑4 MHz @1.8‑5.5 V, 0‑10 MHz @2.7‑5.5 V (ATtiny25/45/85V) |
Source: ATMEL ATtiny25/V * ATtiny45/V ATtiny85/V * * Preliminary handbook
All Atmel ATTINY85 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the operating voltage range for the ATtiny25/45/85?
The device operates from 1.8 V to 5.5 V for the ATtiny25/45/85V version and from 2.7 V to 5.5 V for the ATtiny25/45/85 version.
From: ATMEL ATtiny25/V * ATtiny45/V ATtiny85/V * * Preliminary handbook
How much flash memory is available on the ATtiny25/45/85?
The microcontroller provides 2 KB, 4 KB, or 8 KB of in‑system programmable flash memory.
From: ATMEL ATtiny25/V * ATtiny45/V ATtiny85/V * * Preliminary handbook
What is the operating voltage range for the ATtiny25/45/85?
The device operates from 2.7 V to 5.5 V.
How much flash memory is available in the ATtiny85 family?
It provides 2 KB, 4 KB, or 8 KB of in‑system programmable flash memory.
How much flash memory does the ATtiny85 have?
It provides 2 KB, 4 KB, or 8 KB of in‑system programmable flash memory.
What is the operating voltage range for the ATtiny85?
The device operates from 2.7 V to 5.5 V.