ATtiny25/45/85 is a high performance, low power AVR® 8-bit microcontroller from Atmel
The ATtiny25/45/85 family are low‑power 8‑bit CMOS microcontrollers based on the AVR RISC architecture. They provide up to 8 KB of in‑system programmable flash, EEPROM, SRAM, multiple I/O lines, timers, PWM channels, a 10‑bit ADC and various power‑saving modes.
The device is offered in several temperature grades for automotive use and includes on‑chip debugging, ISP programming via SPI, and a full suite of development tools. Detailed pin descriptions, block diagrams and core architecture information are provided throughout the document.
| Flash Memory | 2/4/8 KB |
|---|---|
| EEPROM | 128/256/512 Bytes |
| SRAM | 128/256/512 Bytes |
| Timer/Counter | 8‑bit with Prescaler and Two PWM Channels |
| ADC | 10‑bit, 4 Single‑Ended Channels, 2 Differential Pairs |
| Operating Voltage | 2.7 V – 5.5 V |
| Maximum Clock Speed | 0.8 MHz @ 2.7‑5.5 V, 16 MHz @ 4.5‑5.5 V |
| Active Mode Current | 300 µA at 1 MHz, 2.7 V |
| Power‑Down Current | 0.2 µA at 2.7 V |
It provides 2 KB, 4 KB, or 8 KB of in‑system programmable flash memory.
The device operates from 2.7 V to 5.5 V.
It includes a 10‑bit ADC with four single‑ended channels and two differential channel pairs.
The power‑down current is about 0.2 µA at 2.7 V.