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ATTINY45-20MU

MCHPATTINY45-20MU

Microchip Technology
AVR AVR® ATtiny, Functional Safety (FuSa) Microcontroller IC 8-Bit 20MHz 4KB (2K x 16) FLASH 20-QFN-EP (4x4)
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Overview

The ATTINY45-20MU is a compact, high-performance 8-bit AVR RISC-based microcontroller featuring 4KB of Flash and 256 bytes of SRAM. This functional safety (FuSa) ready MCU operates at up to 20MHz and integrates essential peripherals like a 10-bit ADC and high-speed PWM in a space-saving 20-QFN package.

Why Choose This Part

The device offers a high power-to-performance ratio with advanced RISC architecture capable of executing most instructions in a single clock cycle. It includes 256 bytes of EEPROM for non-volatile data storage and a robust set of safety features like a enhanced Power-on Reset and debugWIRE for simplified in-circuit debugging.

Applications

Industrial Sensor Nodes
Utilizing the 4-channel 10-bit ADC and internal calibrated oscillator for precise data collection in space-constrained environments.
Safety-Critical Monitoring
Leveraging functional safety features and the programmable Brown-out Detection circuit to ensure reliable operation in hardware watchdog or supervisor roles.
Portable Consumer Electronics
Using Power-down and ADC Noise Reduction modes to extend battery life in handheld devices requiring simple logic control.
Legacy System Interfacing
Employing the Universal Serial Interface (USI) and SPI to act as a bridge between different communication protocols or as a peripheral controller.

Key Specifications

Speed 20MHz
RAM Size 256 x 8
Core Size 8-Bit
EEPROM Size 256 x 8
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Connectivity USI
Mounting Type Surface Mount
Number of I/O 6
Core Processor AVR
Package / Case 20-WFQFN Exposed Pad
Data Converters A/D 4x10b
Oscillator Type Internal
Program Memory Size 4KB (2K x 16)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 20-QFN-EP (4x4)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Developers can use the Microchip Studio or MPLAB X IDE along with the AVR GCC compiler toolchain. Hardware debugging and programming are supported via the debugWIRE interface using the Atmel-ICE or MPLAB PICkit 4/5 programmers.

Also Consider

ATTINY85-20MU MCHPMicrochip Technology - Offers double the Flash memory (8KB) and SRAM (512B) in the same physical footprint for more complex firmware requirements.
ATMEGA328P-MU MCHPMicrochip Technology - A significant step up in resources with 32KB Flash and 23 I/O pins if the project outgrows the ATtiny series.