Table of Contents

PIN and Block DIAGRAM

What is ATTINY85-20SU？

ATTINY85-20SU is CMOS high performance 8-bit low power microcontroller design based on AVR enhanced RISC structure using microchip technology which combines programable 8Kb flash program memory with 6 general-purpose I/O ports, 512B EEPROM, 32 general-purpose registers and operates at 20MHz reference frequency.It includes one 8 bit high-speed timer/counter, one-bit timer/counter with compare modes,internal and external interrupts, programmable watchdog timer with internal oscillator,USI and 3 power-saving modes. By allowing the system designer to provide optimization to processing speed and power consumption, the ATTINY85-20SU achieves throughputs approaching 20 MIPS for 20MHz by implementing powerful instructions in a single clock cycle.

ATTINY85-20SU is designed and manufactured with Atmel’s nonvolatile high-density memory technology. The ISP flash in chip let the program to be reprogrammed in-system by using SPI serial interface. The ATTINY85-20SU is a well built powerful microcontroller that offers a highly flexible and cost-effective solution to many embedded control applications by merging In-System Self-Programmable Flash with 8-bit RISC CPU on a monolithic chip.

The ATTINY85-20SU is supported with a full suite of program and system development tools including in-circuit emulators, C compilers, evaluation kits, macro assemblers, and program debugger/simulators.

Pin Configuration

PIN Name	PIN Description
VCC	Supply voltage
GND	Ground
PORT B	6-bit bi-directional I/O ports with internal pull-up resistors
RESET	Reset Input

Features

Low power AVR 8-bit microcontroller with high performance
Advanced RISC structure
Non-volatile data memories and program
In-system self-programmable flash of 8KB with 10,000 write/erase cycles.
In system programmable EEPROM of 512B with 100,000 writes/erase cycles.
Internal SRAM of 512B
10,000 Flash/ 100,000 EEPROM write/erase cycles
20 years at 85°C/ 100 years at 25°C data retention
Software security programming lock for Flash and EEPROM data.
Peripheral Features
Two PWM channels and 8-bit timer/counter with Prescaler
8-bit High-Speed Timer/Counter with Separate Prescaler
Universal Serial Interface with Start Condition Detector
10-bit ADC
On-chip Analog Comparator
Programmable Watchdog Timer with Separate On-chip Oscillator
On-chip debug system
In system programmable through SP port
Low Power Idle, ADC Noise Reduction, and Power-down Modes
Programmable Brown-out Detection Circuit
External and Internal Interrupt Sources
Enhanced Power-on Reset Circuit
Internal Calibrated Oscillator
Operates at 2.7V to 5.5V voltages
Speed grade 0 – 10 MHz @ 2.7 – 5.5V, 0 – 20 MHz @ 4.5 – 5.5V
Industrial Temperature Range
Low Power Consumption

– Active Mode:

1 MHz, 1.8V: 300 µA

– Power-down Mode:

µA at 1.8V

EQUIVALENT AND ALTERNATIVES

ATTINY85-20SURCT

Applications

There are many applications of ATTINY85-20SU in low power embedded design, development and control systems such as

Automation and control process
consumer electronics
Senors and instrumentation
appliances
monitoring medical equipment
circuitry to control processes.
motor control
rectification
power regulation
DAC applications.

Commonly, it is used with Arduino to provide low power battery-operated applications.

DIMENSIONS

ATTINY85-20SU Related Products Prices

Parts	Mfr.	Description	Stock	Prices
ATTINY85-20SU	Atmel	IC MCU 8BIT 8KB FLASH 8SOIC	1	$0.930 Lowest
ATTINY861V-10SU	Atmel	IC MCU 8BIT 8KB FLASH 20SOIC	1603243	$1.213 Lowest
ATTINY861A-MU	Atmel	IC MCU 8BIT 8KB FLASH 32VQFN	78	$1.856 Lowest
ATTINY85-20PU	Atmel	IC MCU 8BIT 8KB FLASH 8DIP	11500	$1.149 Lowest