Microchip Technology ATMEGA329P-20ANR

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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 SPI, UART/USART, USI
Peripherals Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number of I/O 54
Program Memory Size 32KB (16K x 16)
Program Memory Type FLASH
EEPROM Size 1K x 8
RAM Size 2K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 105°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Supplier Device Package 64-TQFP (14x14)
Package / Case 64-TQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATMEGA329P-20ANR is an 8-bit AVR microcontroller in a 64-TQFP package. It operates from 2.7V to 5.5V at up to 20MHz. With 32KB program memory, 2KB SRAM, and an integrated LCD controller, it is designed for cost-sensitive display and control applications. Additional features include brown-out detection, PWM, and a watchdog timer.

  • Integrated LCD driver – eliminates external display driver ICs, reducing PCB size.
  • Wide voltage range (2.7V-5.5V) – simplifies power supply design in mixed-voltage systems.
  • 20MHz AVR core – provides ample performance for real-time control loops.
  • High-temperature option (105°C) – suitable for automotive and industrial environments.

Metering Displays

The integrated LCD driver and 5V operation make it ideal for utility meters with segment displays.

Industrial Timers

With 20MHz speed and WDT, it provides reliable timing for process control panels.

Battery-Powered Instruments

Low-power sleep modes and 2.7V operation extend battery life in handheld gauges.

Home Appliance Control

The 32KB flash and PWM outputs handle user interfaces and motor speed control in washing machines.

Automotive Aftermarket

105°C rating supports under-dash modules for climate control or trip computers.

Portable Medical Monitors

Integrated LCD and low power enable compact vital-sign displays with long battery life.

Q: What is the maximum clock speed?
A: It runs at up to 20MHz.
Q: Does it have an LCD controller?
A: Yes, it includes a built-in LCD driver for segment displays.
Q: What is the operating voltage range?
A: It operates from 2.7V to 5.5V, compatible with 5V systems.
Q: What package is this variant?
A: It is in a 64-TQFP package.
Base Product Number : ATMEGA329P
20MHz 32KB Flash 64-TQFP 8-bit ATMEGA329P AVR Industrial LCD Driver Metering
Q: What is the maximum clock speed?
A: It runs at up to 20MHz.
Q: Does it have an LCD controller?
A: Yes, it includes a built-in LCD driver for segment displays.
Q: What is the operating voltage range?
A: It operates from 2.7V to 5.5V, compatible with 5V systems.
Q: What package is this variant?
A: It is in a 64-TQFP package.