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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny, Functional Safety (FuSa)
Packaging Tray |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity USI
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 6
Program Memory Size 8KB (4K x 16)
Program Memory Type FLASH
EEPROM Size 512 x 8
RAM Size 512 x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 4x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 20-QFN-EP (4x4)
Package / Case 20-WFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATTINY85-20MU is a high-performance 8-bit AVR microcontroller with 8KB flash and 512 bytes SRAM. Running at up to 20MHz with a 2.7V-5.5V supply, it includes brown-out detection, POR, PWM, and WDT. Its 20-WFQFN package makes it a compact, reliable core for demanding embedded applications.

  • 20MHz high-speed operation – enables faster response and higher PWM frequencies.
  • 8KB flash memory – accommodates complex firmware with room for updates.
  • Comprehensive protection (BOD, POR, WDT) – ensures system stability in harsh environments.
  • 20-WFQFN package – provides excellent thermal dissipation for power-intensive tasks.

High-Speed PWM Dimming

The 20MHz clock enables high-frequency PWM for flicker-free LED dimming in professional lighting.

Power Tool Controllers

With 8KB flash and robust protection features, it can manage brushless motor commutation in cordless drills.

Data Logging Systems

Its 512 bytes SRAM and 20MHz speed allow efficient buffering and storage of sensor data in industrial loggers.

Consumer Electronics

Ideal for toys, remote controls, and small appliances requiring reliable operation at 5V.

Automotive Aftermarket

Operating from -40°C to 85°C, it suits engine bay sensors and dashboard displays.

Security Systems

Brown-out detection ensures stable operation in alarm panels and access control units.

Q: What is the maximum speed of the ATTINY85-20MU?
A: It operates at up to 20MHz, providing higher throughput for time-critical applications.
Q: What is the supply voltage range?
A: It requires 2.7V to 5.5V, suitable for standard 3.3V and 5V systems.
Q: How much flash memory is available?
A: It has 8KB of flash memory (4K x 16), allowing larger programs than smaller AVRs.
Q: What protection features are included?
A: It includes brown-out detection, power-on reset, PWM, and watchdog timer for reliable operation.
Q: What package does it come in?
A: It is available in a 20-WFQFN exposed pad package for efficient thermal management.
Base Product Number : ATTINY85
20-WFQFN 20MHz 8-bit MCU 8KB flash AVR brown-out detection LED lighting motor control PWM WDT
Q: What is the maximum speed of the ATTINY85-20MU?
A: It operates at up to 20MHz, providing higher throughput for time-critical applications.
Q: What is the supply voltage range?
A: It requires 2.7V to 5.5V, suitable for standard 3.3V and 5V systems.
Q: How much flash memory is available?
A: It has 8KB of flash memory (4K x 16), allowing larger programs than smaller AVRs.
Q: What protection features are included?
A: It includes brown-out detection, power-on reset, PWM, and watchdog timer for reliable operation.
Q: What package does it come in?
A: It is available in a 20-WFQFN exposed pad package for efficient thermal management.