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Product attributes Property Value
Manufacturer Microchip Technology
Product Series tinyAVR® 2
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 12
Program Memory Size 4KB (4K x 8)
Program Memory Type FLASH
EEPROM Size 128 x 8
RAM Size 512 x 8
Voltage - Supply (Vcc/Vdd) 1.8V ~ 5.5V
Data Converters A/D 9x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 14-TSSOP
Package / Case 14-TSSOP (0.173", 4.40mm Width)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATTINY424 is a 14-pin AVR microcontroller with 4KB flash and 512 bytes RAM. It operates from 1.8V to 5.5V at 20MHz, with PWM, brown-out reset, and WDT. The TSSOP package is suitable for compact, mid-range applications.

  • 20MHz speed for responsive control.
  • 4KB flash balances capacity and cost.
  • 512B RAM for moderate complexity.
  • Wide voltage range for flexible power design.

Smart Sensors

4KB flash and 20MHz speed enable advanced sensor fusion.

Wearable Devices

Low voltage (1.8V) and small TSSOP package fit wearables.

Home Automation

PWM outputs control dimmers and motorized blinds.

Industrial Monitoring

Brown-out reset ensures stable operation in industrial power.

Portable Instruments

512B RAM supports moderate data buffering.

Automotive Interior

85°C rating covers cabin electronics.

Q: What is the flash size?
A: 4KB.
Q: What is the RAM size?
A: 512 bytes.
Q: What is the maximum speed?
A: 20MHz.
Q: What is the package?
A: 14-TSSOP.
Base Product Number : ATTINY424
20MHz 4KB flash 8-bit AVR MCU smart sensor TSSOP-14 wearable
Q: What is the flash size?
A: 4KB.
Q: What is the RAM size?
A: 512 bytes.
Q: What is the maximum speed?
A: 20MHz.
Q: What is the package?
A: 14-TSSOP.