Microchip Technology ATTINY45-20MUR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny, Functional Safety (FuSa)
Packaging Cut Tape (CT) | NULL
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 4KB (2K x 16)
Program Memory Type FLASH
EEPROM Size 256 x 8
RAM Size 256 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 ATTINY45-20MUR is an 8-bit AVR MCU with 4KB flash and 256B RAM, running at 20MHz. Its 2.7V~5.5V range and integrated BOD, POR, PWM, and WDT make it a compact solution for cost-sensitive embedded control in a 20-WFQFN package.

  • High-speed 20MHz AVR core: Delivers fast response for time-critical tasks.
  • Wide supply voltage (2.7V~5.5V): Flexible for battery or regulated power.
  • Integrated BOD and POR: Prevents data corruption during power events.
  • Small 20-WFQFN package: Saves board space in miniaturized designs.

LED Lighting Control

PWM channels and 20MHz speed allow smooth dimming and color mixing.

Battery Management

Low power AVR core with 2.7V~5.5V suits portable battery monitors.

Sensor Interfacing

Small 20-pin package with analog inputs for temperature and pressure sensors.

Motor Drivers

Fast PWM generation for small DC motor speed control in toys and pumps.

Consumer Electronics

Compact footprint and robust reset circuitry for remote controls and wearables.

Automotive Accessories

WDT and brown-out detection ensure reliable operation in 12V vehicle systems.

Q: What is the maximum clock speed?
A: It runs at 20MHz with a 2.7V~5.5V supply.
Q: How much program memory does it have?
A: It has 4KB flash (2K x 16) and 256 bytes RAM.
Q: What package is this?
A: It comes in a 20-WFQFN exposed pad package.
Q: Does it include safety features?
A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
Q: What temperature range is supported?
A: It operates from -40°C to 85°C.
Base Product Number : ATTINY45-20MU
20MHz 256B RAM 4KB Flash 8-bit MCU AVR Battery LED Control Microchip WFQFN-20
Q: What is the maximum clock speed?
A: It runs at 20MHz with a 2.7V~5.5V supply.
Q: How much program memory does it have?
A: It has 4KB flash (2K x 16) and 256 bytes RAM.
Q: What package is this?
A: It comes in a 20-WFQFN exposed pad package.
Q: Does it include safety features?
A: Yes, it has Brown-out Detect/Reset, POR, PWM, and WDT.
Q: What temperature range is supported?
A: It operates from -40°C to 85°C.