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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATtiny, Functional Safety (FuSa)
Packaging Tube |
Core Processor AVR
Core Size 8-Bit
Speed 20MHz
Connectivity USI
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 6
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 4x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Through Hole
Supplier Device Package 8-PDIP
Package / Case 8-DIP (0.300", 7.62mm)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATTINY85-20PU is a versatile 8-bit AVR microcontroller in a through-hole 8-DIP package. It delivers 20MHz performance with 8KB flash and 512 bytes SRAM, operating from 2.7V to 5.5V. With PWM, brown-out detection, and a watchdog timer, it suits prototyping and embedded control applications.

  • Through-Hole Convenience: DIP package enables easy breadboarding and manual soldering for rapid prototyping.
  • High Speed for Size: 20MHz in an 8-pin package provides ample processing for real-time control loops.
  • Generous Memory: 8KB flash supports moderately complex firmware without external storage.
  • Robust Analog: 4-channel 10-bit ADC simplifies sensor integration in compact designs.

DIY Electronics Projects

The 8-pin DIP package is breadboard-friendly, making it perfect for hobbyist LED cubes or simple robots, with 20MHz speed for real-time effects.

Power Tool Accessories

With 2.7V minimum operation, it monitors battery voltage in cordless drills, triggering low-battery warnings via PWM-driven buzzers.

Smart Lighting Systems

Its 8KB flash stores complex fading patterns for RGB LED strips, while the 20MHz core ensures smooth 16-bit PWM updates.

Security Alarm Sensors

The watchdog timer and brown-out detection maintain reliable operation in PIR motion detectors, with the 512B SRAM buffering event logs.

Educational Kits

Through-hole DIP pins simplify soldering for students learning embedded C, with the internal oscillator eliminating crystal components.

Portable Game Controllers

It reads joystick analog inputs via its 4-channel ADC and sends button states over serial, running at 20MHz for minimal latency.

Q: What is the maximum clock frequency of the ATTINY85-20PU?
A: It operates at up to 20MHz with a supply voltage between 2.7V and 5.5V.
Q: How much flash memory does it have?
A: It provides 8KB of flash memory and 512 bytes of SRAM for program and data storage.
Q: What package is this available in?
A: It comes in an 8-pin DIP package (0.300" width), suitable for through-hole prototyping.
Q: Does it support PWM output?
A: Yes, it has 2 PWM channels with high-resolution timing for motor or LED control.
Base Product Number : ATTINY85
20MHz 8-bit MCU 8KB Flash ADC AVR DIP-8 Hobby Prototyping PWM
Q: What is the maximum clock frequency of the ATTINY85-20PU?
A: It operates at up to 20MHz with a supply voltage between 2.7V and 5.5V.
Q: How much flash memory does it have?
A: It provides 8KB of flash memory and 512 bytes of SRAM for program and data storage.
Q: What package is this available in?
A: It comes in an 8-pin DIP package (0.300" width), suitable for through-hole prototyping.
Q: Does it support PWM output?
A: Yes, it has 2 PWM channels with high-resolution timing for motor or LED control.