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ATMEGA32L-8MUR

8-bit AVR MCU, 8MHz, 32KB Flash, 2.7-5.5V, 44-VQFN, low-power

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Manufacturer Part：

ATMEGA32L-8MUR

Package：

44-VQFN (7.0 x 7.0 x 1.0 mm)

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Description

Product Overview

The ATMEGA32L-8MUR from Microchip Technology is an 8-bit AVR RISC microcontroller with 32KB ISP Flash and 2KB SRAM in a 44-pin VQFN package. Operating at 8MHz with a low 2.7V minimum supply voltage, it is optimized for low-power battery-operated applications.

Key Specifications

Core AVR 8-bit RISC
Max Clock 8MHz
Flash 32KB
SRAM 2KB
EEPROM 1KB
I/O Pins 32
Supply Voltage 2.7V ~ 5.5V
ADC 10-bit, 8 channels

Features

  • High-performance AVR RISC architecture
  • 131 instructions, most single-clock cycle execution
  • 32KB ISP Flash with 10,000 erase/write cycles
  • 1KB EEPROM with 100,000 erase/write cycles
  • 4 PWM channels and real-time counter
  • Programmable serial USART, SPI, and I2C

Applications

  • Battery-powered sensor nodes
  • Low-power industrial controllers
  • Handheld instrumentation
  • Motor speed control in appliances
  • Access control and security systems

The ATMEGA32L-8MUR is a low-voltage variant of the popular ATmega32 AVR microcontroller from Microchip Technology. It features 32KB ISP Flash, 2KB SRAM, and 1KB EEPROM in a compact 44-pin VQFN package. The L-suffix indicates operation down to 2.7V, making it ideal for single-cell Li-Ion or dual-cell alkaline battery applications. The AVR core executes most instructions in a single clock cycle, delivering up to 8 MIPS throughput at 8MHz. Rich peripherals include 8-channel 10-bit ADC, 4 PWM channels, USART, SPI, and Two-Wire (I2C) interfaces.

The ATMEGA32L uses the AVR enhanced RISC architecture with 32 general-purpose registers, enabling single-cycle instruction execution for most ALU operations. The Harvard architecture separates program and data memory buses, allowing simultaneous instruction fetch and data access. Flash memory stores the program and is in-system programmable via SPI. The EEPROM provides non-volatile data storage that survives power cycles. Peripherals are memory-mapped and accessed via I/O registers. Power management modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby) reduce current consumption to sub-microamp levels when the CPU is not needed.

Pin Name Type Function
1 PB0/XCK/T0 I/O GPIO / USART clock / Timer0
2-8 PB1-PB7 I/O GPIO / SPI / Timer / ADC triggers
9-16 PD0-PD7 I/O GPIO / USART / INT / PWM / ADC
17 PC0/ADC0 I/O GPIO / ADC channel 0
18-24 PC1-PC7 I/O GPIO / ADC / I2C / JTAG
25-32 PA0-PA7 I/O GPIO / ADC channels 0-7
33 AREF Reference ADC reference voltage
34 GND Power Ground
35 AVCC Power Analog supply
36-44 VCC/RESET/XTAL Pwr/I/O Power, Reset, Oscillator
  • Battery-powered wireless sensor nodes
  • Low-voltage industrial monitoring and control
  • Handheld measurement instruments
  • Home appliance motor control
  • Access control and security token systems
Manufacturer Part Number Package Notes
Microchip ATMEGA324PA-MU 44-VQFN 32KB Flash, 20MHz, picoPower
Microchip ATMEGA32L-8AU 44-TQFP Same chip, TQFP package
Microchip ATMEGA164PA-MU 44-VQFN 16KB Flash, 20MHz
Renesas R8C/33T 48-LQFP 16-bit, 32KB Flash, 20MHz
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All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

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