Microchip Technology ATTINY25-20MUR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny, Functional Safety (FuSa)
Packaging Cut Tape (CT) | Tape & Reel (TR)
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 2KB (1K x 16)
Program Memory Type FLASH
EEPROM Size 128 x 8
RAM Size 128 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 ATTINY25-20MUR is a compact 8-bit AVR microcontroller in a 20-WFQFN package. It operates from 2.7V to 5.5V at up to 20MHz, with 2KB of Flash and 128 bytes of SRAM. Featuring PWM, Brown-out Reset, POR, and WDT, it is designed for space-constrained, battery-powered applications.

  • Ultra-small WFQFN package – ideal for miniaturized wearable and IoT devices.
  • High-speed 20MHz operation – enables real-time PWM and sensor processing.
  • Low power consumption – extends battery life in portable applications.
  • Integrated BOR and WDT – improves system reliability without extra components.

Wearable Fitness Trackers

The 20-WFQFN package is ultra-thin, while 2.7V operation matches Li-ion battery ranges, enabling step counting and heart-rate monitoring.

LED Strip Controllers

With 20MHz speed and PWM, it can generate multiple channels for RGB LED color mixing in decorative lighting.

Small Drone ESCs

Its fast PWM and small footprint make it suitable for controlling brushless motors in micro drones.

Portable Instrumentation

The 2KB Flash handles calibration data, while BOR ensures stable readings during battery discharge.

Smart Toys

Low cost and small size allow integration into interactive toys with sound and motion effects.

Security Key Fobs

Its low power consumption extends battery life, while WDT prevents code lockups during RF transmission.

Q: What is the operating voltage range?
A: The ATTINY25-20MUR operates from 2.7V to 5.5V, suitable for 3V and 5V systems.
Q: What is the maximum speed?
A: It runs at up to 20MHz, providing fast execution for time-sensitive tasks.
Q: How much memory does it have?
A: It includes 2KB of Flash (1K x 16-bit) and 128 bytes of SRAM.
Q: What package is this?
A: It is in a 20-WFQFN exposed pad package, ideal for compact PCB layouts.
Q: Does it have PWM and watchdog?
A: Yes, it features PWM, Brown-out Detect/Reset, POR, and WDT for reliable operation.
Base Product Number : ATTINY25
20MHz 8-bit MCU ATtiny AVR battery BOR Microchip PWM wearable WFQFN-20
Q: What is the operating voltage range?
A: The ATTINY25-20MUR operates from 2.7V to 5.5V, suitable for 3V and 5V systems.
Q: What is the maximum speed?
A: It runs at up to 20MHz, providing fast execution for time-sensitive tasks.
Q: How much memory does it have?
A: It includes 2KB of Flash (1K x 16-bit) and 128 bytes of SRAM.
Q: What package is this?
A: It is in a 20-WFQFN exposed pad package, ideal for compact PCB layouts.
Q: Does it have PWM and watchdog?
A: Yes, it features PWM, Brown-out Detect/Reset, POR, and WDT for reliable operation.