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Description
MICROCHIP ATTINY44-20SSU 8 Bit Microcontroller, Low Power High Performance, ATtiny, 20 MHz, 4 KB, 256 Byte, 14 Pins, SOICThe ATTINY44 20SSU is a low power 8 bit CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny44 achieves throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the arithmetic
The ATTINY44-20SSU is a low-power 8-bit CMOS Microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny44 achieves throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers. All 32 registers are directly connected to the arithmetic logic unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The ATtiny44 provides 4kB of in-system programmable flash, 256byte EEPROM and 256byte SRAM. The device supports a throughput of 20MIPS at 20MHz.
- Advanced RISC architecture
- 120 Powerful instructions most single clock cycle execution
- 32 x 8 General purpose working registers
- Fully static operation
- One 8-bit and one 16-bit timer/counter with two PWM channels, each
- Programmable watchdog timer with separate on-chip oscillator
- On-chip analog comparator
- Universal serial interface
- DebugWIRE on-chip debug system
- In-system programmable via SPI port
- Internal and external interrupt sources - Pin change interrupt on 12 pins
- Low power idle, ADC noise reduction, standby and power-down modes
- Enhanced power-on reset circuit
- Programmable brown-out detection circuit
- Internal calibrated oscillator
- On-chip temperature sensor
- Twelve Programmable I/O lines
- 300�A at 1.8V (1MHz System Clock) Active mode power consumption
Applications
Industrial
Product details
| Controller Family/Series | ATtiny |
| Embedded Interface Type | I2C, SPI |
| No. of I/O's | 12I/O's |
| Program Memory Size | 4KB |
| No. of Pins | 14Pins |
| Product Range | tinyAVR Microcontrollers |
| Automotive Qualification Standard | - |
| CPU Speed | 20MHz |
| Supply Voltage Min | 2.7V |
| MCU Case Style | SOIC |
| Packaging | Each |
| Supply Voltage Max | 5.5V |
| RAM Memory Size | 256Byte |
| MSL | MSL 2 - 1 year |
Other details
| Brand | MICROCHIP |
| Part Number | ATTINY44-20SSU |
| Quantity | Each |
| Technical Data Sheet EN | |
| Product Change Notice EN |
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4.7 ★★★★★
Based on 47 reviews
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Product Reviews
★★★★★ 5
Loved it
Color: Brown/Wild Duck, Size: Large, Color: Brown/Wild Duck, Size: Large
He loved it so much, he destroyed it so we ordered another.
I didn't realize that you can stick an empty water bottle inside.
Again, the first one didn't last long, but he enjoyed it
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Very fun interactive toy
Color: Brown/Wild Duck, Size: Medium
This toy is very versatile. There's no stuffing yet it's very soft so it can be used as a tug toy. It also makes for a fun fetch toy because it has a cavity to put a water bottle. It gives your dog something that crinkles and can be pierced when bitten and easily replaced with another empty bottle whenever necessary.
That is what really makes this toy the standout of all the ones offered by Best Pet imo. I don't expect this to last forever but once my pup gets bigger we'll probably get the large size for her because there's not too many all in one fetch and tug toys at an affordable price.
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Reviewed in the United States on May 15, 2026
★★★★★ 4
Great Toy, but Big Dogs Destroy the Squeakers Fast
Color: Wild Duck, Hare, Squirrel & Alligator, Size: Large
My big dogs had the squeaker torn out in no time, but my little dog absolutely loves this toy. It’s the perfect size for her, and she carries it everywhere. Durable enough for small pups, just not tough enough for heavy chewers. Still a fun toy overall!
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Fun for dogs
Color: Green/Alligator, Size: Small
Smaller than I expected, but the two little dogs love it!
They love shaking it, making it squeak, tugging it against each other & chasing it when I throw it to fetch. They often sleep laying on it.
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Reviewed in the United States on May 25, 2026
★★★★★ 3
WEIRD feature - requires a water bottle
Color: Cow, Size: Large
Cute, but buyer beware. Maybe the description said this, but who would think to read for this.... You have to insert an empty bottle (like an old water bottle) for it to make the crinkle noise. There is a velcro spot at the base where you can open it and insert the water bottle for the noise factor and your dogs entertainment. I've yet to do that, but feel like my dog is gonna figure out the velcro and get the bottle out in no time. Seems like a waste of money. I could just give her an empty water bottle without the toy for free.
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Reviewed in the United States on June 9, 2026