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                                                                                                    1. Home
                                                                                                    2. Semiconductors - ICs
                                                                                                    3. Microcontrollers
                                                                                                    4. 8-bit Microcontrollers
                                                                                                    Print Page

                                                                                                    ATTINY43U-MU

                                                                                                    8 Bit MCU, Low Power High Performance, AVR ATtiny Family ATtiny43 Series Microcontrollers, AVR

                                                                                                    MICROCHIP
                                                                                                    Image is for illustrative purposes only. Please refer to product description.
                                                                                                    MICROCHIP ATTINY43U-MU
                                                                                                    ManufacturerMICROCHIP
                                                                                                    Manufacturer Part NoATTINY43U-MU
                                                                                                    Newark Part No.68T3682
                                                                                                    Product RangeAVR ATtiny Family ATtiny43 Series Microcontrollers
                                                                                                    Your Part Number
                                                                                                    Technical Datasheet

                                                                                                    Data Sheet

                                                                                                    See all Technical Docs
                                                                                                    Available to Order
                                                                                                    Manufacturer Standard Lead Time: 9 week(s)
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                                                                                                    Price shown includes applicable duties and tariffs
                                                                                                    QuantityPrice
                                                                                                    100+$2.190
                                                                                                    Price for:Each
                                                                                                    Minimum: 490
                                                                                                    Multiple: 490
                                                                                                    $1,073.10
                                                                                                    Line Note
                                                                                                    Added to your Order Confirmation, Invoice, and Dispatch note for this order only.

                                                                                                    Product Information

                                                                                                    MICROCHIP
                                                                                                    ManufacturerMICROCHIP
                                                                                                    Manufacturer Part NoATTINY43U-MU
                                                                                                    Newark Part No.68T3682
                                                                                                    Product RangeAVR ATtiny Family ATtiny43 Series Microcontrollers
                                                                                                    Technical Datasheet

                                                                                                    Data Sheet

                                                                                                    Base NumberATtiny
                                                                                                    Product RangeAVR ATtiny Family ATtiny43 Series Microcontrollers
                                                                                                    CPU Speed8MHz
                                                                                                    Device CoreAVR
                                                                                                    Operating Frequency Max8MHz
                                                                                                    Program Memory Size4KB
                                                                                                    No. of Pins20Pins
                                                                                                    MCU Case StyleQFN
                                                                                                    IC Case / PackageQFN
                                                                                                    No. of I/O's16I/O's
                                                                                                    InterfacesI2C, SPI
                                                                                                    Embedded Interface TypeI2C, SPI
                                                                                                    RAM Memory Size256Byte
                                                                                                    ADC Channels4Channels
                                                                                                    MCU FamilyAVR ATtiny
                                                                                                    ADC Resolution10Bit
                                                                                                    Supply Voltage Min1.8V
                                                                                                    MCU SeriesATtiny43
                                                                                                    Supply Voltage Max5.5V
                                                                                                    Operating Temperature Min-40°C
                                                                                                    Operating Temperature Max85°C
                                                                                                    IC MountingSurface Mount
                                                                                                    Qualification-
                                                                                                    MSLMSL 3 - 168 hours
                                                                                                    SVHCNo SVHC (04-Feb-2026)

                                                                                                    Product Overview

                                                                                                    The ATTINY43U-MU is a low-power 8-bit CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny43U achieves throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the arithmetic logic unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The ATtiny43U provides 4kB of In-system programmable flash, 64byte EEPROM and 256byte SRAM.

                                                                                                    • Advanced RISC architecture
                                                                                                    • 123 Powerful instructions most single clock cycle execution
                                                                                                    • 32 x 8 General purpose working registers
                                                                                                    • Fully static operation
                                                                                                    • QTouch® library support for capacitive touch sensing (8 channels)
                                                                                                    • Two 8-bit timers/counters with two PWM channels, each
                                                                                                    • Programmable watchdog timer with separate on-chip oscillator
                                                                                                    • On-chip analog comparator
                                                                                                    • Universal serial interface
                                                                                                    • Boost converter
                                                                                                    • DebugWIRE on-chip debug system
                                                                                                    • In-system programmable via SPI port
                                                                                                    • External and internal interrupt sources
                                                                                                    • Pin change interrupt on 16 pins
                                                                                                    • Low power idle, ADC noise reduction and power-down modes
                                                                                                    • Enhanced power-on reset circuit
                                                                                                    • Programmable brown-out detection circuit
                                                                                                    • Internal calibrated oscillator
                                                                                                    • Temperature sensor on-chip

                                                                                                    Applications

                                                                                                    Industrial

                                                                                                    Technical Specifications

                                                                                                    Base Number

                                                                                                    ATtiny

                                                                                                    CPU Speed

                                                                                                    8MHz

                                                                                                    Operating Frequency Max

                                                                                                    8MHz

                                                                                                    No. of Pins

                                                                                                    20Pins

                                                                                                    IC Case / Package

                                                                                                    QFN

                                                                                                    Interfaces

                                                                                                    I2C, SPI

                                                                                                    RAM Memory Size

                                                                                                    256Byte

                                                                                                    MCU Family

                                                                                                    AVR ATtiny

                                                                                                    Supply Voltage Min

                                                                                                    1.8V

                                                                                                    Supply Voltage Max

                                                                                                    5.5V

                                                                                                    Operating Temperature Max

                                                                                                    85°C

                                                                                                    Qualification

                                                                                                    -

                                                                                                    SVHC

                                                                                                    No SVHC (04-Feb-2026)

                                                                                                    Product Range

                                                                                                    AVR ATtiny Family ATtiny43 Series Microcontrollers

                                                                                                    Device Core

                                                                                                    AVR

                                                                                                    Program Memory Size

                                                                                                    4KB

                                                                                                    MCU Case Style

                                                                                                    QFN

                                                                                                    No. of I/O's

                                                                                                    16I/O's

                                                                                                    Embedded Interface Type

                                                                                                    I2C, SPI

                                                                                                    ADC Channels

                                                                                                    4Channels

                                                                                                    ADC Resolution

                                                                                                    10Bit

                                                                                                    MCU Series

                                                                                                    ATtiny43

                                                                                                    Operating Temperature Min

                                                                                                    -40°C

                                                                                                    IC Mounting

                                                                                                    Surface Mount

                                                                                                    MSL

                                                                                                    MSL 3 - 168 hours

                                                                                                    Technical Docs (3)

                                                                                                    CAD CadSoft_EAGLE EN

                                                                                                    Technical Data Sheet EN

                                                                                                    Product Change Notice EN

                                                                                                    Legislation and Environmental

                                                                                                    US ECCN:EAR99
                                                                                                    EU ECCN:Unknown
                                                                                                    RoHS Compliant:Yes

                                                                                                    RoHS

                                                                                                    RoHS Phthalates Compliant:Yes

                                                                                                    RoHS

                                                                                                    SVHC:No SVHC (04-Feb-2026)
                                                                                                    Download Product Compliance Certificate

                                                                                                    Product Compliance Certificate

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