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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 16MHz
Connectivity I2C, SPI, UART/USART
Peripherals PWM
Number of I/O 12
Program Memory Size 8KB (8K x 8)
Program Memory Type FLASH
EEPROM Size 512 x 8
RAM Size 512 x 8
Voltage - Supply (Vcc/Vdd) 1.7V ~ 5.5V
Data Converters A/D 12x10b
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 ATTINY841 is a low-power AVR 8-bit MCU in a 20-WFQFN package. It operates from 1.7V to 5.5V at up to 16MHz. With 8KB flash and 512 bytes RAM, it includes PWM peripherals. Its ultra-low voltage capability makes it ideal for battery-powered and portable applications.

  • Ultra-low 1.7V operation extends battery life in portable devices.
  • Compact 20-WFQFN package saves PCB area for miniaturized products.
  • 8KB flash provides ample code space for complex sensor algorithms.
  • PWM channels enable direct drive of LEDs and small motors without extra ICs.

Wearable Health Monitors

The 1.7V minimum voltage allows direct coin-cell operation, while 16MHz speed processes heart-rate sensor data in fitness bands.

IoT Sensor Nodes

With 512B RAM and 8KB flash, it can buffer environmental data and transmit via external RF modules in smart agriculture.

Battery Management Systems

Its low-voltage operation and PWM outputs enable cell balancing in single-cell Li-ion protection circuits.

Consumer Electronics Haptics

The small QFN package fits inside game controllers, generating vibration patterns via PWM-driven actuators.

Portable Medical Devices

Extended temperature range and low power make it suitable for glucose meters and digital thermometers.

Smart Home Sensors

It can manage PIR motion detectors and transmit alerts over Zigbee, with 16MHz handling protocol timing.

Q: What is the supply voltage range?
A: It operates from 1.7V to 5.5V, ideal for low-power and battery applications.
Q: What package is this?
A: It comes in a 20-WFQFN exposed pad package for compact designs.
Q: How much flash memory does it have?
A: It has 8KB (8K x 8) of flash program memory.
Q: Does it support PWM?
A: Yes, it includes PWM channels for driving LEDs or motors.
Base Product Number : ATTINY841
16MHz 20-WFQFN 8-bit MCU AVR battery IoT low-power Microchip PWM wearable
Q: What is the supply voltage range?
A: It operates from 1.7V to 5.5V, ideal for low-power and battery applications.
Q: What package is this?
A: It comes in a 20-WFQFN exposed pad package for compact designs.
Q: How much flash memory does it have?
A: It has 8KB (8K x 8) of flash program memory.
Q: Does it support PWM?
A: Yes, it includes PWM channels for driving LEDs or motors.