Microchip Technology ATMEGA164P-20AUR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
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 32
Program Memory Size 16KB (8K x 16)
Program Memory Type FLASH
EEPROM Size 512 x 8
RAM Size 1K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 44-TQFP (10x10)
Package / Case 44-TQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATMEGA164P-20AUR from Microchip is an 8-bit AVR MCU running at 20MHz. It offers 16KB flash and 1KB RAM, with PWM, WDT, and brown-out detection. Operating from 2.7V to 5.5V, it comes in a 44-TQFP package, making it a robust choice for cost-sensitive embedded control.

  • Wide voltage range (2.7V-5.5V) – simplifies power supply design.
  • 20MHz performance – sufficient for real-time control loops.
  • Proven AVR architecture – extensive community and code examples.
  • Compact 44-TQFP – saves PCB space.

Automotive Aftermarket Sensors

5V operation and 20MHz speed allow direct interface with legacy 5V sensors in retrofitted vehicles.

Home Appliance Control

PWM outputs drive triacs for motor speed control in fans and washing machines, with WDT for safety.

Battery Management Systems

Low-power modes and 2.7V operation extend battery life in portable power tools.

Educational Robotics Kits

Simple AVR architecture and 44-pin package make it easy for students to build line-following robots.

HVAC Thermostats

Reliable brown-out detection prevents erratic behavior during compressor startup.

Lighting Ballasts

PWM dimming control for LED drivers with minimal external components.

Q: What is the maximum speed?
A: 20MHz.
Q: What voltage range?
A: 2.7V to 5.5V.
Q: How much flash and RAM?
A: 16KB flash and 1KB RAM.
Q: What package?
A: 44-TQFP.
Q: Does it have PWM?
A: Yes, plus WDT and brown-out detection.
Base Product Number : ATMEGA164P
16KB Flash 1KB RAM 20MHz 44-TQFP 8-bit MCU appliance ATMEGA164P automotive AVR Microchip PWM WDT
Q: What is the maximum speed?
A: 20MHz.
Q: What voltage range?
A: 2.7V to 5.5V.
Q: How much flash and RAM?
A: 16KB flash and 1KB RAM.
Q: What package?
A: 44-TQFP.
Q: Does it have PWM?
A: Yes, plus WDT and brown-out detection.