ATtiny406 AVR® Microcontrollers

Microchip Technology ATtiny406 AVR® Microcontrollers are capable of running at up to 20MHz with up to 4KB Flash, 256bytes of SRAM, and 128 bytes of EEPROM. These MCUs use the low-power AVR RSIC architecture and the latest technologies, including Event System and SleepWalking. The ATtiny406 MCUs feature core independent peripherals, accurate analog features, multiple clock options, Single Pin Unified Program Debug Interface (UPDI), and three sleep modes. These MCUs operate at -40°C to +125°C temperature range and are available in a 20-pin package.

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Description Datasheet Availability Pricing (USD) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Core
Program Memory Size
Data RAM Size
Package / Case
Maximum Clock Frequency
ADC Resolution
Number of I/Os
Supply Voltage - Min
Supply Voltage - Max
Mounting Style
Data Bus Width
Minimum Operating Temperature
Maximum Operating Temperature
Series
Packaging
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, QFN20, Ind 105C, Green, T&R
Datasheet
6,000In Stock
6,000Expected 10/15/2026
MouseReel Available
Min.: 1
Mult.: 1
: 6,000

AVR 4 kB 256 B VQFN-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 105 C ATtiny406 Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, SOIC20, Ind 105C, Green, T&R
Datasheet
1,500In Stock
Min.: 1
Mult.: 1
: 1,500

AVR 4 kB 256 B SOIC-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 105 C ATtiny406 Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, VQFN20, Ext 125C, Tray
Datasheet
836In Stock
Min.: 1
Mult.: 1
AVR 4 kB 256 B VQFN-20 16 MHz 10 bit 18 I/O 2.7 V 5.5 V SMD/SMT 8 bit/16 bit - 40 C + 125 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, VQFN20, Ind 105C, Tray
Datasheet
860In Stock
Min.: 1
Mult.: 1
AVR 4 kB 256 B VQFN-20 16 MHz 10 bit 18 I/O 2.7 V 5.5 V SMD/SMT 8 bit/16 bit - 40 C + 105 C Tray
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, QFN20, Ind 125C, Green, T&R
Datasheet
5,757In Stock
12,000Expected 12/17/2026
MouseReel Available
Min.: 1
Mult.: 1
: 6,000

AVR 4 kB 256 B VQFN-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 125 C ATtiny406 Reel, Cut Tape, MouseReel
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, SOIC20, Ind 125C, Green, Tube
Datasheet
585In Stock
Min.: 1
Mult.: 1

AVR 4 kB 256 B SOIC-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 125 C ATtiny406 Tube
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, SOIC20, Ind 125C, Green, T&R
Datasheet
734In Stock
1,500Expected 10/8/2026
Min.: 1
Mult.: 1
: 1,500

AVR 4 kB 256 B SOIC-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 125 C ATtiny406 Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU 20MHz, 4KB, SOIC20, Ind 105C, Green, Tube
Datasheet
475In Stock
1,026Expected 11/19/2026
Min.: 1
Mult.: 1

AVR 4 kB 256 B SOIC-20 20 MHz 10 bit 18 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 105 C ATtiny406 Tube