Microchip Technology ATTINY861-20MUR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny
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 16
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 11x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 32-VQFN (5x5)
Package / Case 32-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATTINY861-20MUR is an 8-bit AVR microcontroller delivering 20MHz performance in a compact 32-VFQFN package. It provides 8KB flash memory, 512B SRAM, and a rich set of peripherals including a 10-bit ADC, PWM, and analog comparator. With a wide supply voltage range of 2.7V to 5.5V and robust brown-out detection, it is engineered for reliable operation in industrial and consumer applications.

  • High-Speed AVR Core: 20MHz operation enables fast response times for real-time control loops.
  • Wide Voltage Range: 2.7V-5.5V support simplifies power supply design and allows direct battery connection.
  • Integrated Analog Peripherals: 10-bit ADC and comparator reduce external component count and BOM cost.
  • Compact Package: 32-VFQFN with exposed pad improves thermal performance and saves PCB area.

Compact Sensor Nodes

The 20MHz AVR core with 8KB flash and 512B SRAM is ideal for reading analog sensors and transmitting data via SPI or I2C in space-constrained IoT nodes.

PWM Motor Control

With built-in PWM and a 10-bit ADC, this MCU can drive small DC motors or LEDs with closed-loop current sensing, all within a 2.7V-5.5V supply.

Battery-Powered Devices

Its low-power sleep modes and wide voltage range make it suitable for battery-operated remote controls or thermostats, ensuring long battery life.

Industrial Timers

The WDT and brown-out detection ensure reliable operation in industrial timer applications, preventing system lockups during voltage dips.

Automotive Interior Lighting

Operating at -40°C to 85°C, it can control RGB LED strips in automotive interiors, using PWM channels for color mixing and brightness control.

Portable Medical Monitors

The small 32-VFQFN package and low power consumption enable compact wearable heart-rate or temperature monitors with analog front-end integration.

Q: What is the maximum operating frequency of the ATTINY861-20MUR?
A: The ATTINY861-20MUR operates at up to 20MHz with a supply voltage range of 2.7V to 5.5V.
Q: What is the program memory size?
A: It features 8KB of in-system programmable flash memory (4K x 16 words).
Q: What package is this device available in?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact designs.
Q: Does it include analog comparators?
A: Yes, it includes a 10-bit ADC, analog comparator, and multiple PWM channels.
Base Product Number : ATTINY861-20MU
20MHz 32-VFQFN 8-bit MCU 8KB Flash ADC ATTINY861 AVR industrial IoT low power PWM
Q: What is the maximum operating frequency of the ATTINY861-20MUR?
A: The ATTINY861-20MUR operates at up to 20MHz with a supply voltage range of 2.7V to 5.5V.
Q: What is the program memory size?
A: It features 8KB of in-system programmable flash memory (4K x 16 words).
Q: What package is this device available in?
A: It comes in a 32-VFQFN exposed pad package, suitable for compact designs.
Q: Does it include analog comparators?
A: Yes, it includes a 10-bit ADC, analog comparator, and multiple PWM channels.