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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny
Packaging Tube |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity USI
Peripherals Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number of I/O 16
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) 1.8V ~ 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 20-TSSOP
Package / Case 20-TSSOP (0.173", 4.40mm Width)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATTINY261A-XU from Microchip Technology is a compact 8-bit AVR microcontroller with 2KB flash and 128B RAM. It runs at 20MHz with a supply range of 1.8V to 5.5V, featuring brown-out reset, POR, PWM, temperature sensor, and WDT. The 20-TSSOP package is ideal for ultra-compact applications.

  • Ultra-compact TSSOP-20 – saves significant board space.
  • Low voltage operation (1.8V) – perfect for coin-cell batteries.
  • Integrated temperature sensor – eliminates external parts.
  • 20MHz speed – sufficient for basic control loops.

Miniature Sensor Nodes

Small TSSOP package and low power enable wireless sensing.

Battery-Powered Timers

1.8V operation extends shelf life in timers.

Simple Motor Controllers

PWM outputs drive small DC motors.

Consumer Gadgets

2KB flash fits firmware for toys and remotes.

Temperature Monitoring

Built-in sensor reduces BOM cost.

Lighting Effects

PWM channels create color patterns in LED strips.

Q: What is the program memory size?
A: 2KB flash, suitable for simple control tasks.
Q: What is the supply voltage?
A: 1.8V to 5.5V, flexible for low-power designs.
Q: What package is this?
A: 20-TSSOP, very thin and space-saving.
Q: Does it have a temperature sensor?
A: Yes, integrated for thermal monitoring.
Base Product Number : ATTINY261A
20-TSSOP 20MHz 8-bit MCU ATtiny AVR battery compact low power PWM temperature sensor
Q: What is the program memory size?
A: 2KB flash, suitable for simple control tasks.
Q: What is the supply voltage?
A: 1.8V to 5.5V, flexible for low-power designs.
Q: What package is this?
A: 20-TSSOP, very thin and space-saving.
Q: Does it have a temperature sensor?
A: Yes, integrated for thermal monitoring.