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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny
Packaging Tray |
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 ~ 125°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 ATTINY406-MF is a robust 8-bit AVR microcontroller from Microchip, engineered for harsh environments. It operates at up to 20MHz with 4KB Flash and 256B RAM. The extended temperature range (-40°C to 125°C) and VFQFN package make it a reliable choice for automotive and industrial applications.

  • Extended Temperature Range: -40°C to 125°C ensures operation in extreme conditions.
  • AVR Efficiency: High code density and low power consumption per MHz.
  • Compact Footprint: 20-VFQFN saves space while providing good thermal path.
  • Integrated Safety: BOR and WDT enhance system reliability.

Automotive Sensors

With 125°C rating, it can operate under hood, monitoring temperature or pressure.

Industrial Actuators

Its robust design and PWM support control valves or relays in factory automation.

High-Temperature Battery Packs

Can manage cell balancing and protection in Li-ion packs that generate heat.

LED Drivers for Outdoor Lighting

Wide temperature range ensures reliable operation in extreme weather conditions.

Power Tools

Handles motor control and safety interlocks in drills or saws, withstanding vibration and heat.

Avionics (Non-critical)

Meets extended temperature requirements for cabin lighting or seat controls.

Q: What is the core type?
A: It uses the AVR 8-bit core, running at up to 20MHz.
Q: What is the operating temperature range?
A: This version supports -40°C to 125°C, suitable for automotive and industrial.
Q: How much memory does it have?
A: It has 4KB Flash and 256B RAM.
Q: What package is available?
A: It comes in a 20-VFQFN exposed pad package.
Base Product Number : ATTINY406
20MHz 4KB Flash 8-bit MCU automotive AVR high temp industrial VFQFN
Q: What is the core type?
A: It uses the AVR 8-bit core, running at up to 20MHz.
Q: What is the operating temperature range?
A: This version supports -40°C to 125°C, suitable for automotive and industrial.
Q: How much memory does it have?
A: It has 4KB Flash and 256B RAM.
Q: What package is available?
A: It comes in a 20-VFQFN exposed pad package.