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Product attributes Property Value
Manufacturer Microchip Technology
Product Series tinyAVR™ 0, Functional Safety (FuSa)
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, WDT
Number of I/O 18
Program Memory Size 4KB (4K x 8)
Program Memory Type FLASH
EEPROM Size 128 x 8
RAM Size 256 x 8
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V
Data Converters A/D 12x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 105°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 20-VQFN (3x3)
Package / Case 20-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATTINY406-MNR is a low-power 8-bit AVR microcontroller in a 20-pin VFQFN package. It features 4KB Flash, 256B SRAM, and runs at 20MHz. Operating from 1.8V to 5.5V, it includes brown-out detection, POR, PWM, and WDT. Ideal for multi-I/O, space-efficient designs.

  • 20-pin VFQFN with exposed pad: Provides more I/O and better thermal performance.
  • Wide temperature range (-40°C to 105°C): Reliable in harsh environments.
  • Low voltage operation (1.8V): Extends battery life in portable devices.
  • Multiple PWM channels: Supports complex lighting and motor control.
  • Integrated analog peripherals: Reduces external component count.

Multi-Channel LED Lighting

20 pins allow driving multiple PWM channels for RGB lighting.

Industrial Process Controllers

Wide temperature range (-40°C to 105°C) suits factory environments.

Smart Sensor Hubs

4KB Flash and multiple I/O handle data aggregation from sensors.

Battery Management Systems

1.8V operation and low power extend battery life in BMS.

Automotive Control Modules

Robust WDT and 105°C rating meet automotive requirements.

Portable Medical Devices

Compact VFQFN package fits wearable health monitors.

Q: What is the operating voltage range?
A: It operates from 1.8V to 5.5V.
Q: What is the maximum speed?
A: The AVR core runs at 20MHz.
Q: How much Flash and SRAM does it have?
A: It has 4KB Flash and 256B SRAM.
Q: What package is this?
A: It is a 20-pin VFQFN with exposed pad.
Q: Does it support PWM?
A: Yes, it includes PWM, brown-out detect, POR, and WDT.
Base Product Number : ATTINY406
20-VFQFN 20MHz 4KB Flash 8-bit MCU ATTINY406 automotive AVR industrial low power multi-channel PWM
Q: What is the operating voltage range?
A: It operates from 1.8V to 5.5V.
Q: What is the maximum speed?
A: The AVR core runs at 20MHz.
Q: How much Flash and SRAM does it have?
A: It has 4KB Flash and 256B SRAM.
Q: What package is this?
A: It is a 20-pin VFQFN with exposed pad.
Q: Does it support PWM?
A: Yes, it includes PWM, brown-out detect, POR, and WDT.