ATTINY43U-MUR

$2.23

Description：IC MCU 8BIT 4KB FLASH 20QFN
Series：AVR® ATtiny
Mfr：Microchip Technology
Package：Tape & Reel (TR),Cut Tape (CT)
Core Processor：AVR

SKU:47eaf8731cb7 Category: Microcontrollers Brand: Microchip Technology

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Product introduction

Product Detailed Parameters

Description：IC MCU 8BIT 4KB FLASH 20QFN
Series：AVR® ATtiny
Mfr：Microchip Technology
Package：Tape & Reel (TR),Cut Tape (CT)
Core Processor：AVR
Core Size：8-Bit
Speed：8MHz
Connectivity：USI
Peripherals：Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number of I/O：16
Program Memory Size：4KB (2K x 16)
Program Memory Type：FLASH
EEPROM Size：64 x 8
RAM Size：256 x 8
Voltage - Supply (Vcc/Vdd)：1.8V ~ 5.5V
Data Converters：A/D 4x10b
Oscillator Type：Internal
Operating Temperature：-40°C ~ 85°C (TA)
Mounting Type：Surface Mount
Supplier Device Package：20-QFN-EP (4x4)
Package / Case：20-WFQFN Exposed Pad
Grade：-
Qualification：-

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ATTINY43U-MUR

Overview

The ATtiny43U-MUR is an 8-bit AVR microcontroller in a 20-pad QFN/MLF package. It features 4K bytes of In-System Programmable Flash, 64 bytes EEPROM, and 256 bytes SRAM. The device includes an integrated boost converter enabling operation from 0.7V to 1.8V, or 1.8V to 5.5V when bypassed. It supports speeds up to 8 MHz at 2.7V–5.5V and 4 MHz at lower voltages. Key peripherals include two 8-bit Timer/Counters with PWM, a 4-channel 10-bit ADC, Universal Serial Interface, Analog Comparator, and capacitive touch sensing support.

Feature Summary

Integrated boost converter enables low-voltage battery operation
Supports capacitive touch sensing via QTouch Library
Advanced RISC architecture for high throughput per MHz
On-chip debug system and in-system programming capability

Applications

Battery-powered applications using single AA or AAA cells
Capacitive touch sensor interfaces
Low-cost embedded control systems
Portable devices requiring extended battery life

Procurement Notes

Verify the ordering suffix 'R' indicates tape and reel packaging as specified in the datasheet. Confirm the package type corresponds to the 20-pad QFN/MLF variant (20M1). Ensure the speed grade matches the required operating voltage range for your specific application design.

Selection Notes

Select this component if your design requires operation below 1.8V using the internal boost converter. Consider the 20-pin pinout constraints and available I/O lines. Verify that the 4K Flash and 256 bytes SRAM meet your memory requirements. Check compatibility with existing development tools like debugWIRE.

Part Context

The ATtiny43U belongs to the tinyAVR family, specifically designed for low-power applications. It integrates an on-chip boost converter, a unique feature allowing operation from very low supply voltages. This distinguishes it from standard AVR microcontrollers that typically require higher minimum supply voltages.