Microchip Technology ATMEGA168P-20MU

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
Packaging Tray |
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 23
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 32-VQFN (5x5)
Package / Case 32-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATMEGA168P-20MU is a high-performance 8-bit AVR microcontroller in a compact 32-VFQFN package. It delivers 20MHz processing speed with 16KB flash and 1KB SRAM, operating from 2.7V to 5.5V. Its integrated brown-out detection, power-on reset, and watchdog timer ensure robust operation in demanding environments.

  • Wide Voltage Range (2.7V-5.5V): Simplifies design by supporting both 3.3V and 5V systems without level shifters.
  • High Integration: Includes PWM, WDT, and brown-out detection, reducing external component count and BOM cost.
  • Proven AVR Core: 20MHz throughput with efficient single-cycle instructions for time-critical control loops.
  • Compact QFN Package: 32-VFQFN footprint saves board space for space-constrained designs.

Industrial Sensor Node

Use the ATMEGA168P-20MU in industrial sensor nodes requiring low-power operation and reliable brown-out detection. Its 2.7V-5.5V supply range ensures compatibility with both 3.3V and 5V sensors.

Motor Control for Small Appliances

With built-in PWM and a 20MHz AVR core, this MCU can generate precise control signals for small DC or stepper motors in appliances, benefiting from the watchdog timer for system recovery.

Portable Medical Devices

The low operating voltage and power-on reset features make it suitable for battery-powered medical monitors. Its 1K x 8 RAM is sufficient for simple data logging and signal processing.

Automotive Aftermarket Add-ons

Operating from -40°C to 85°C, it can handle under-hood or cabin electronics like window controllers or lighting modules, where the brown-out detector ensures safe shutdown during voltage dips.

Smart Home Thermostat

Combine the 16KB flash for complex control algorithms with the PWM output for driving heating elements. The 32-VFQFN package allows for a compact PCB design in wall-mounted units.

Battery Management System (BMS) Monitor

Monitor cell voltages and temperatures in a small BMS. The AVR core's efficiency and the integrated analog features allow for accurate ADC readings while maintaining low current draw.

Q: What is the maximum clock speed of the ATMEGA168P-20MU?
A: The maximum clock speed is 20MHz.
Q: What is the operating voltage range?
A: It operates from 2.7V to 5.5V.
Q: How much flash memory does it have?
A: It has 16KB of flash program memory.
Q: What package is this device available in?
A: It comes in a 32-VFQFN exposed pad package.
Base Product Number : ATMEGA168P
16KB Flash 1KB SRAM 20MHz 8-bit MCU Automotive AVR Industrial Low Power PWM QFN-32 WDT
Q: What is the maximum clock speed of the ATMEGA168P-20MU?
A: The maximum clock speed is 20MHz.
Q: What is the operating voltage range?
A: It operates from 2.7V to 5.5V.
Q: How much flash memory does it have?
A: It has 16KB of flash program memory.
Q: What package is this device available in?
A: It comes in a 32-VFQFN exposed pad package.