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ATMEGA325PV-10MUR - 8-bit AVR MCU 32KB 10MHz | Microchip
ATMEGA325PV-10MUR

ATMEGA325PV-10MUR - 8-bit AVR MCU 32KB 10MHz | Microchip

The Microchip Technology ATMEGA325PV-10MUR is an 8-bit AVR ATmega microcontroller IC delivering 32KB (16K x 16) of In-System-Programmable FLASH, 2KB SRAM, and 1KB EEPROM, running at up to 10 MHz from a 1.8V to 5.5V supply in a 64-pin QFN (9x9 mm) package with exposed pad. An 8-bit microcontroller is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals such as timers, UART, SPI, and ADC on one silicon die. Within the power-management hierarchy of embedded systems, the microcontroller sits at the top level of control: an MCU such as this AVR device supervises sensors, drives actuators, and manages lower-level power and interface ICs. The AVR ATmega family uses a modified Harvard architecture with single-cycle RISC instruction execution, making it one of the most widely taught and deployed 8-bit controller families in the industry. Key features include the 32KB self-programmable FLASH with boot-code capability, 2KB of internal SRAM for data buffers, and 1KB of non-volatile EEPROM for parameter storage. The low-voltage V-grade operation from 1.8V supports single-cell battery and energy-harvesting designs, while the 10 MHz maximum clock targets low-EMI, low-power applications rather than maximum throughput. The 54 general-purpose I/O lines, USART, SPI, and JTAG debug interface provide full connectivity for industrial designs. Technically, the ATmega325P executes most instructions in a single clock cycle through its pipelined RISC core with 32 general-purpose working registers. The P-suffix denotes the picoPower process generation with reduced leakage, and the V suffix indicates the wide 1.8V-5.5V operating voltage range. Peripherals typically include an 8-channel 10-bit ADC, multiple 8-bit and 16-bit timers with PWM, and on-chip debug via JTAG (per family architecture; refer to the manufacturer datasheet for exact peripheral counts). Typical applications include battery-powered instruments, industrial sensor nodes, building automation controllers, and hand-held metering equipment where wide supply range and mature tool support matter more than raw processing speed. Design consideration: the 64-QFN exposed-pad package requires a well-connected thermal pad for reliable grounding, and V-grade parts must satisfy power-supply derating rules at high clock speeds above the 10 MHz ceiling at reduced VCC. This page synthesizes distributor pricing, drop-in same-family alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet alone.

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ATMEGA325V-8AI - 8-bit AVR MCU, 32KB Flash, 8MHz, 1.8V | Microchip
ATMEGA325V-8AI

ATMEGA325V-8AI - 8-bit AVR MCU, 32KB Flash, 8MHz, 1.8V | Microchip

The Microchip Technology ATMEGA325V-8AI is an 8-bit AVR RISC microcontroller featuring 32KB (16K x 16) ISP Flash memory with read-while-write capability, 1KB EEPROM, 2KB SRAM, and a maximum clock frequency of 8MHz across a wide 1.8V to 5.5V supply voltage range, housed in a 64-pin TQFP (14x14 mm) industrial-temperature package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, positioning it within the broader hierarchy of microcontrollers (MCU) and embedded processors. AVR MCUs are widely used for general-purpose embedded control where deterministic execution, low power, and simple tooling matter more than raw compute throughput. Key features of the ATMEGA325V-8AI include 54 general-purpose I/O lines, 32 general-purpose working registers, a JTAG interface for boundary-scan, on-chip debugging, and in-system programming, three flexible Timer/Counters with compare modes, and an on-chip ADC. The V speed grade sustains full 8MHz operation down to low supply voltages, unlike the 16MHz/20MHz grades that require 4.5V or higher. The AVR core combines a rich instruction set with single-cycle ALU operation, delivering up to 8 MIPS at 8MHz. ISP Flash with read-while-write permits firmware updates in the field without halting code execution, and the 1KB EEPROM retains calibration and configuration data through power cycles. The JTAG port supports IEEE boundary-scan test, OCD, and programming through a single connector. Typical applications include battery-powered instruments that exploit the 1.8V operation, industrial automation controllers, and building/HVAC control nodes. The 54 GPIO lines suit panel control, relay driving, and multi-peripheral designs. When designing, remember that the V grade is limited to 8MHz: to run faster you must switch to the P or non-V grades, which requires only a board swap to a same-footprint variant. This page synthesizes distributor availability, same-footprint drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA325V-8MI - 8-bit AVR MCU 32KB Flash 8MHz 64-QFN | Microchip
ATMEGA325V-8MI

ATMEGA325V-8MI - 8-bit AVR MCU 32KB Flash 8MHz 64-QFN | Microchip

The Microchip (Atmel) ATMEGA325V-8MI is an 8-bit AVR RISC microcontroller with 32KB (16K x 16) of In-System Programmable Flash, operating at up to 8MHz across a 1.8V to 5.5V supply range, housed in a 64-pin QFN (9x9 mm) exposed-pad package. The V suffix denotes the wide low-voltage operating range, the 8 suffix denotes the 8MHz maximum clock at 1.8V-5.5V, and the MI suffix denotes industrial temperature qualification for surface-mount assembly. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. Within the embedded systems hierarchy, the AVR ATmega family sits in the general-purpose microcontroller category alongside Microchip PIC, ST STM8, and NXP 8051 derivatives, serving as the central control element in a larger system that includes power management, sensing, and communication ICs. Key features include the advanced AVR RISC architecture with 130 powerful instructions, most executing in a single clock cycle, which yields throughput close to 8 MIPS at 8MHz and allows efficient C-compiled code. In-System Programmable (ISP) Flash enables firmware update in the final application via the SPI interface without removing the device from the PCB. The low-voltage 1.8V operation suits battery-powered designs, while several power-saving sleep modes reduce average consumption in duty-cycled systems. Architecturally, the AVR core uses a Harvard structure with separate program and data buses, fast register file access, and on-chip peripherals including timers, USART, SPI, and a 10-bit ADC, all clocked from internal RC or external crystal sources. The 64-QFN exposed-pad package provides a compact 9x9 mm footprint with a thermal pad for ground connection and improved heat spreading on the PCB. Typical applications include industrial automation nodes, battery-operated metering and sensing equipment, medical device control boards, and consumer appliance interfaces, where the wide 1.8V-5.5V range and industrial temperature rating provide design margin across real-world supply and environmental conditions. A key design consideration is clock selection versus supply voltage: when operating below 2.7V, the 8MHz limit is conservative and safe, but always verify the frequency-versus-voltage curve in the manufacturer datasheet before raising system clocks near the V-range boundaries. This page synthesizes verified distributor inventory, drop-in family alternatives, and practical sourcing guidance not consolidated in the manufacturer datasheet.

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ATMEGA325V-8MU - 8MHz AVR MCU, 32KB Flash | Microchip
ATMEGA325V-8MU

ATMEGA325V-8MU - 8MHz AVR MCU, 32KB Flash | Microchip

The Microchip Technology ATMEGA325V-8MU is an 8-bit AVR ATmega microcontroller delivering 8 MHz maximum clock speed, 32KB (16K x 16) of In-System Programmable FLASH, 2KB SRAM, and 1KB EEPROM, housed in a 64-pin QFN (9x9 mm) package with exposed pad. The V suffix denotes operation from a 1.8V to 5.5V supply, making it one of the few ATmega MCUs that runs across the full single-cell-lithium to 5V logic range. An 8-bit microcontroller is an integrated circuit that executes embedded control programs using an 8-bit CPU datapath; it belongs to the microcontroller hierarchy of embedded processor -> MCU -> 8-bit AVR family -> ATmega325V. Microcontrollers combine CPU, memory, and peripherals on one die, so a single chip can sense, compute, and drive outputs in embedded systems. Key features include the advanced RISC AVR architecture with 131 powerful instructions, most executing in a single clock cycle, achieving close to 1 MIPS per MHz. Peripherals include an 8-channel 10-bit ADC, USART, SPI, two-wire interface (TWI), two 8-bit timers, one 16-bit timer with RTC capability, and a programmable watchdog timer. Technically, the ATmega325V uses a Harvard architecture with separate program and data buses and in-system programmable (ISP) flash via SPI, supporting bootloader-based field updates. Power management features include idle, ADC noise reduction, power-save, power-down, standby, and extended standby sleep modes for battery designs. Typical applications include battery-powered instrumentation, low-voltage industrial sensors, handheld meters, and consumer control panels where 1.8V operation extends battery life. Design consideration: the 8 MHz speed grade limits compute headroom, so size timing loops and UART baud rates accordingly. This page adds value beyond the manufacturer datasheet with drop-in alternatives, pricing tiers, and design notes.

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ATMEGA325V-8MUR - 8MHz AVR MCU, 32KB Flash, 64-QFN | Microchip
ATMEGA325V-8MUR

ATMEGA325V-8MUR - 8MHz AVR MCU, 32KB Flash, 64-QFN | Microchip

The Microchip Technology ATMEGA325V-8MUR is a low-power 8-bit AVR RISC microcontroller with 32KB of In-System Programmable FLASH (16K x 16), 2KB SRAM, 1KB EEPROM, and a maximum clock frequency of 8 MHz, operating from a 1.8V to 5.5V supply in a 64-pad QFN/MLF (9x9 mm) surface-mount package. An 8-bit AVR ATmega microcontroller is a Harvard-architecture RISC processor that executes most of its 131 instructions in a single clock cycle. Within the power-management hierarchy, it functions as the primary system controller in embedded designs, integrating program memory, data memory, timers, analog-to-digital conversion, and serial communication onto one die, eliminating external controller logic. Key features include the advanced RISC AVR core with 32 general-purpose working registers, up to 54 general-purpose I/O lines (organized as six 8-bit ports), a 10-bit ADC, SPI, UART/USART, and USI serial interfaces, plus brown-out detection, power-on reset, and PWM peripherals. The 'V' grade supports the wide 1.8V to 5.5V operating range for battery-powered designs, while the industrial temperature range covers -40C to +85C. The ATmega325 executes up to 8 MIPS at 8 MHz, using a two-stage pipeline that separates instruction fetch and execution. The self-programming FLASH enables in-system reprogramming, and the EEPROM retains calibration data through power cycles. Multiple sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby) reduce quiescent current for energy-critical applications. Typical applications include battery-powered instrumentation, industrial sensor nodes and controllers, consumer appliances, and low-voltage handheld devices, where the wide 1.8V supply range directly supports single-cell Li-ion or 2x AA battery architectures. Design consideration: at 5V the maximum guaranteed clock is 8 MHz for this V-grade part; do not clock it at 16 MHz as the standard-grade ATmega325-16 allows. Verify Brown-out Detector threshold against the lowest expected supply voltage. This page adds distributor sourcing data, drop-in alternatives within the ATmega325 family, pricing tiers, and practical design notes not found in the manufacturer datasheet.

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ATMEGA328-AU - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip (Tape & Reel)
ATMEGA328-AU

ATMEGA328-AU - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip (Tape & Reel)

The Microchip Technology ATMEGA328-AU is an 8-bit AVR RISC microcontroller delivering 20 MIPS at 20 MHz, with 32 KB of In-System Programmable Flash, 1 KB EEPROM, 2 KB SRAM, and 23 general-purpose I/O lines, housed in a 32-pin TQFP (7x7 mm) package supplied in tape and reel format. An 8-bit microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals such as timers, UART, SPI, and I2C on one die. MCUs sit at the lowest level of the embedded systems hierarchy - below SoCs and application processors - and are the workhorses of industrial control, consumer appliances, and hobbyist platforms such as the Arduino UNO, which made the ATmega328 family the most recognized 8-bit MCU in the world. Key features include the AVR enhanced RISC architecture executing most instructions in a single clock cycle, 32 general-purpose working registers, three flexible timer/counters, a 10-bit ADC with 8 multiplexed channels (6 differential with programmable gain), and hardware USART, SPI, and TWI (I2C) serial interfaces. The device supports both 2.5V to 5.5V operation across its speed grades, enabling battery-powered 3.3V designs as well as 5V industrial rails. Technical depth: the Harvard architecture with separate program and data buses allows single-cycle instruction fetch and execution. In-System Programmable Flash with read-while-write support permits firmware updates in the field via SPI or a bootloader, while independent lock bits protect code IP. Power management includes idle, ADC noise reduction, power-save, power-down, standby, and extended standby modes, plus an on-chip brown-out detector and internal RC oscillator options. Typical applications include Arduino-compatible boards, industrial sensor nodes, motor control panels, HVAC and appliance control, battery monitors, and consumer electronics - anywhere a low-cost, well-supported 8-bit controller with rich analog and serial peripherals is required. Design consideration: decouple VCC/AVCC with 100 nF ceramics close to pins, and remember the TQFP-32 version exposes ADC6 and ADC7 (pins 19 and 22) that the 28-pin DIP variant lacks - useful for extra analog channels. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, as of 2026-09-17.

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ATMEGA328-AUR - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip
ATMEGA328-AUR

ATMEGA328-AUR - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip

The Microchip Technology ATMEGA328-AUR is an 8-bit AVR RISC microcontroller delivering 20 MIPS at 20 MHz, with 32 KB of In-System Programmable Flash, 1 KB EEPROM, 2 KB SRAM, and 23 general-purpose I/O lines, housed in a 32-pin TQFP (7x7 mm) package supplied in tape and reel format. An 8-bit microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and peripherals such as timers, UART, SPI, and I2C on one die. MCUs sit at the lowest level of the embedded systems hierarchy - below SoCs and application processors - and are the workhorses of industrial control, consumer appliances, and hobbyist platforms such as the Arduino UNO, which made the ATmega328 family the most recognized 8-bit MCU in the world. Key features include the AVR enhanced RISC architecture executing most instructions in a single clock cycle, 32 general-purpose working registers, three flexible timer/counters, a 10-bit ADC with 8 multiplexed channels (6 differential with programmable gain), and hardware USART, SPI, and TWI (I2C) serial interfaces. The device supports both 2.5V to 5.5V operation across its speed grades, enabling battery-powered 3.3V designs as well as 5V industrial rails. Technical depth: the Harvard architecture with separate program and data buses allows single-cycle instruction fetch and execution. In-System Programmable Flash with read-while-write support permits firmware updates in the field via SPI or a bootloader, while independent lock bits protect code IP. Power management includes idle, ADC noise reduction, power-save, power-down, standby, and extended standby modes, plus an on-chip brown-out detector and internal RC oscillator options. Typical applications include Arduino-compatible boards, industrial sensor nodes, motor control panels, HVAC and appliance control, battery monitors, and consumer electronics - anywhere a low-cost, well-supported 8-bit controller with rich analog and serial peripherals is required. Design consideration: decouple VCC/AVCC with 100 nF ceramics close to pins, and remember the TQFP-32 version exposes ADC6 and ADC7 (pins 19 and 22) that the 28-pin DIP variant lacks - useful for extra analog channels. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, as of 2026-09-17.

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ATMEGA328-MMH - 8-Bit AVR MCU 20MHz 32KB Flash VQFN-28 | Microchip
ATMEGA328-MMH

ATMEGA328-MMH - 8-Bit AVR MCU 20MHz 32KB Flash VQFN-28 | Microchip

The Microchip Technology ATMEGA328-MMH is an 8-bit AVR RISC microcontroller delivering 20 MHz maximum clock frequency, 32 KB ISP Flash memory, and 2 KB SRAM in a 28-pad VQFN (4x4 mm) package with exposed pad. It executes most instructions in a single clock cycle, achieving up to 20 MIPS throughput at 20 MHz. An 8-bit microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals such as timers, UART, SPI, and I2C on one chip. Within the power-management and embedded-system hierarchy, the MCU sits at the heart of a device, reading sensors, driving actuators, and running the application firmware. The AVR ATmega family from Microchip (originally Atmel) is one of the most widely used 8-bit MCU families in industry and education. Key features include the advanced RISC architecture with 131 powerful instructions and 32 general-purpose working registers, 32 KB of self-programmable Flash with read-while-write support, 1 KB EEPROM for non-volatile data storage, 23 general-purpose I/O lines, and a 10-bit ADC with up to 8 channels (including the dedicated ADC6/ADC7 pads on the VQFN package). Two 8-bit timers, one 16-bit timer, a USART, SPI, and two-wire interface (I2C) round out the peripheral set. Technically, the ATMEGA328-MMH uses a Harvard architecture with separate program and data buses for parallel instruction and data access. It supports six sleep modes for aggressive power reduction, an on-chip debug interface (debugWIRE), and in-system programming via SPI. Supply voltage operation spans 2.5 V to 5.5 V per distributor data, supporting both 3.3 V and 5 V logic systems. Typical applications include industrial control and automation nodes, consumer electronics, robotics, IoT sensor endpoints, and Arduino-compatible embedded designs - the ATmega328 core is the engine of the Arduino Uno platform, giving it unmatched community and toolchain support. A key design consideration: at 20 MHz and 5 V the device is at its maximum rated speed grade, so verify the supply is a clean 5 V; derating the clock to 16 MHz or lower is required for reliable 3.3 V operation. This page synthesizes distributor pricing, drop-in alternatives within the AVR family, pinout data, and practical design notes not found in the manufacturer datasheet.

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ATMEGA328-MMHR - 8-Bit AVR MCU 20MHz 32KB Flash | Microchip
ATMEGA328-MMHR

ATMEGA328-MMHR - 8-Bit AVR MCU 20MHz 32KB Flash | Microchip

The Microchip Technology ATMEGA328-MMHR is an 8-bit AVR RISC microcontroller IC delivering 20 MIPS at 20 MHz, with 32KB of in-system programmable FLASH (16K x 16), 2KB SRAM, and 512B EEPROM, housed in a 28-pin VQFN (4x4 mm, MLF) package with exposed pad. An 8-bit microcontroller is a single-chip processor executing instructions on 8-bit data words, sitting within the broader hierarchy of embedded processors: microcontroller -> embedded processor -> system-on-chip -> semiconductor device. AVR ATmega devices combine a Harvard-architecture RISC CPU with on-chip flash program memory, SRAM data memory, EEPROM, and rich analog/digital peripherals, allowing a complete embedded control system in one package. Key features include the AVR RISC core executing most instructions in a single clock cycle (131 instructions, 32 general-purpose registers), up to 20 MIPS throughput, six-channel 10-bit ADC with 2x differential channels, two 8-bit timers and one 16-bit timer, USART, SPI, and 2-wire (I2C) serial interfaces, plus watchdog timer and on-chip debug capability via debugWIRE. The MMHR suffix denotes the RoHS-green QFN/MLF package supplied in tape and reel for automated assembly. Technically, the ATMEGA328 uses an enhanced AVR core with pipelined single-cycle execution and a Harvard bus structure enabling concurrent program and data access. Self-programmable flash supports in-system programming through SPI and bootloader firmware, while 1.8V to 5.5V operation supports battery designs at reduced clock rates. Sleep modes from idle to power-down minimize average current draw. Typical applications include embedded sensor nodes and IoT endpoints, industrial control and automation interfaces, consumer appliance controls, and the well-known Arduino UNO-class open-source platforms (the 328 family is the classic Arduino MCU). Design consideration: place 100nF decoupling at the VCC pin and ensure the exposed die pad is soldered to a ground pour for thermal and EMI performance; keep XTAL traces short when using an external crystal. This page synthesizes distributor data, drop-in alternatives, 28-pin QFN pinout, and practical design notes not found on the manufacturer product page.

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ATMEGA328-MU - 8-bit AVR MCU 32KB Flash 20MHz | Microchip
ATMEGA328-MU

ATMEGA328-MU - 8-bit AVR MCU 32KB Flash 20MHz | Microchip

The Microchip Technology ATMEGA328-MU is an 8-bit AVR RISC microcontroller with 32 KB of in-system programmable Flash, 2 KB SRAM, and 1 KB EEPROM, running at up to 20 MHz and packaged in a 32-pin VQFN (5x5 mm) with an exposed thermal pad. The industrial-grade (-40C to +85C) device integrates 23 general-purpose I/O lines, a 10-bit ADC with up to 8 channels, two 8-bit timers plus one 16-bit timer, and a rich set of serial interfaces including I2C, SPI, and USART. An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (Flash), working RAM, non-volatile EEPROM, and a set of peripherals. The AVR family used by the ATmega328 implements a Modified Harvard RISC architecture with 131 instructions, most of which complete in a single clock cycle, giving the ATMEGA328-MU an effective throughput of up to 20 MIPS at 20 MHz. Within the broader taxonomy, the part belongs to the hierarchy: AVR 8-bit MCU -> Microcontroller -> Embedded Processor -> Semiconductor. Key features include the debugWIRE on-chip debug interface (eliminating the need for a full JTAG header), an internal calibrated oscillator, six sleep modes with power-down currents under 1 uA, and a 10-bit successive-approximation ADC capable of 15 kSPS at full resolution. The integrated brown-out detector and watchdog timer simplify firmware safety, while the peripheral event system and programmable serial USART support industrial bus protocols. Architecturally, the ATmega328 combines an 8-bit ALU with 32 general-purpose working registers that are directly accessible by the instruction set, eliminating accumulator bottlenecks. The 32 KB Flash is organized as 16K x 16 to optimize code density and enable on-chip self-programming via a bootloader, the same mechanism that allows Arduino Uno compatibility and ISP (In-System Programming) through the SPI pins. Typical applications include Arduino-compatible boards, sensor hubs, low-power battery nodes, and small industrial controllers. The wide 1.8 V to 5.5 V supply range supports both 3.3 V and 5 V rails, and the low-power sleep modes make the device suitable for solar-powered or energy-harvesting designs. When designing with this part, observe the maximum 20 MHz clock at 4.5 V to 5.5 V supply; at lower Vcc the maximum frequency is derated per the datasheet DC characteristics. Decouple VCC and AVCC with 100 nF plus 10 uF bulk capacitors placed within 5 mm of the pins. This page synthesizes DigiKey/Mouser distributor pricing, drop-in alternatives (ATmega328P-MU family variants and ATMEGA328PB-MU), and practical PCB/layout design notes that complement the manufacturer datasheet.

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ATMEGA328-MUR - AVR 8-Bit MCU 32KB 20MHz VQFN-32 | Microchip
ATMEGA328-MUR

ATMEGA328-MUR - AVR 8-Bit MCU 32KB 20MHz VQFN-32 | Microchip

The Microchip Technology ATMEGA328-MUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 32KB of In-System Programmable Flash, 2KB SRAM, 1KB EEPROM, and a 20MHz maximum clock frequency, housed in a 32-pin VQFN (5x5 mm) package with exposed pad on Tape & Reel for industrial temperature operation. An 8-bit AVR microcontroller is a self-contained computing IC that executes programs from internal Flash memory while integrating SRAM, EEPROM, timers, ADC, and communication peripherals on a single die. Within the power-management and embedded-control hierarchy, the ATmega328 sits in the mid-range of Microchip's AVR ATmega family between the ATmega168 (16KB) and the ATmega328PB (enhanced peripheral set), and is the silicon family behind the classic Arduino UNO. Key features include 131 powerful RISC instructions with mostly single-cycle execution delivering up to 20 MIPS at 20MHz, an 8-channel 10-bit ADC, 2 x 8-bit and 1 x 16-bit timers, and USART, SPI, and I2C (TWI) serial interfaces. The 4K byte self-programming Flash enables boot-loader firmware updates in the field. Technically, the advanced RISC architecture combines a 32-register general-purpose file directly connected to the ALU, allowing two independent registers to be accessed in a single instruction.debugWIRE on-chip debug support and pin-selectable brown-out detection simplify development and improve system robustness. The device operates from 2.5V to 5.5V depending on speed grade, with sleep modes down to microamp-level standby. Typical applications include industrial sensors and controllers, Arduino-compatible hobby and maker boards, HVAC and building automation nodes, and battery-powered portable instruments where a mature, well-documented 8-bit platform is preferred. Design consideration: at 20MHz the device requires 4.5V to 5.5V supply; use the internal 8MHz RC oscillator or an external crystal with appropriate fuse settings, and verify brown-out threshold against supply tolerance. This page synthesizes distributor pricing context, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.

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ATMEGA328-PU - 8-Bit 20MHz 32KB Flash MCU | Microchip
ATMEGA328-PU

ATMEGA328-PU - 8-Bit 20MHz 32KB Flash MCU | Microchip

The Microchip Technology ATMEGA328-PU is an 8-bit AVR microcontroller operating up to 20 MHz, with 32 KB of in-system programmable flash, 2 KB SRAM, and 1 KB EEPROM in a 28-pin through-hole DIP package. It is designed for embedded control, digital I/O, timers, serial communication, and general-purpose battery-powered products. The ATMEGA328-PU combines an AVR RISC core, programmable I/O, and serial interfaces in a device that can be assembled through holes rather than surface-mount reflow. A microcontroller is a programmable integrated circuit that combines a CPU core, memory, and peripherals into one embedded-control component. The ATMEGA328-PU belongs to the AVR family and uses an 8-bit architecture with single-cycle instruction execution, allowing useful control performance at modest clock rates. Its DIP-28 package makes it especially suitable for Arduino-style boards, prototyping systems, educational kits, and products assembled in conventional through-hole production. Key features include 32 KB of flash memory, 2 KB of SRAM, 1 KB of EEPROM, 20 MHz maximum clock frequency, and 32 I/O ports according to the supplied distributor result. The device also provides integrated support for common embedded-control functions, including timers, serial communication, and programmable digital interfaces. Its 28-PDIP package supports straightforward socket assembly and through-hole PCB insertion. The AVR architecture is suitable for deterministic control loops because many instructions execute in a single clock cycle. This helps software respond efficiently to inputs while timers and serial interfaces handle time-based or communication-related tasks. The 20 MHz operating point provides additional performance margin over lower-frequency 8-bit implementations, although the actual clock source, fuse settings, and power conditions must be confirmed in the manufacturer documentation. Typical applications include Arduino-compatible controller boards, automation and industrial control modules, temperature and environmental monitoring, LED lighting systems, data loggers, hobby robotics, and battery-powered embedded products. The through-hole package is useful where technicians need socketed replacement or where automated assembly does not handle fine-pitch SMD components. For a new design, verify the required clock, memory, serial interfaces, and analog functions against the manufacturer datasheet before transferring an existing board. A replacement must match the package, pinout, voltage requirements, and relevant memory characteristics; a functionally similar microcontroller is not automatically a drop-in replacement. This page combines verified distributor information, package-specific selection guidance, and engineering-oriented application context. Pricing, stock, lifecycle status, and detailed electrical limits should be confirmed against current distributor and manufacturer records before committing to production.

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ATMEGA328P-15AZ - 8-bit AVR MCU 32KB Flash TQFP-32 | Microchip
ATMEGA328P-15AZ

ATMEGA328P-15AZ - 8-bit AVR MCU 32KB Flash TQFP-32 | Microchip

The Microchip Technology ATMEGA328P-15AZ is a high-performance, low-power 8-bit AVR RISC microcontroller with 32KB of In-System Self-Programmable Flash memory, operating at up to 20 MHz from a 1.8V to 5.5V supply, housed in a 32-pin TQFP package (10 x 10 mm, 0.8 mm pitch). An 8-bit AVR microcontroller is a single-chip processor that integrates a RISC CPU, non-volatile program memory, SRAM, EEPROM, and peripheral functions such as timers, UART, SPI, I2C, and a 10-bit ADC on one die. Within the power-management and embedded-control hierarchy, the AVR family sits in the broader category of microcontroller units (MCUs), competing with PIC, STM8, and 8051 architectures in cost-sensitive embedded systems. Key features include the advanced RISC architecture with 131 powerful instructions, most executing in a single clock cycle, 32 x 8 general-purpose working registers, and an on-chip 2-cycle hardware multiplier delivering up to 16 MIPS throughput at 16 MHz. The P suffix denotes picoPower technology for ultra-low sleep-mode consumption, critical for battery-powered designs. High-endurance non-volatile memory segments provide 32KB of In-System Self-Programmable Flash with separate boot lock and true read-while-write operation. Architecturally, the ATmega328P pairs its Harvard-structure CPU with a flexible timer/counter system, USART, SPI, and Two-Wire Interface (I2C), plus a 10-bit successive-approximation ADC that enables direct analog sensor interfacing without external conversion circuitry. Typical applications include Arduino-compatible boards (the ATmega328P is the classic Arduino Uno/Nano processor), industrial sensor nodes, consumer appliance control, and legacy embedded systems where code and toolchain compatibility matter. Design consideration: at 5.5V maximum rating, observe total current limits per port and use decoupling capacitors on AVCC and VCC pins; the internal RC oscillator eliminates the need for an external crystal in non-timing-critical designs. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet.

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ATMEGA328P-15MZ 32KB 8-Bit AVR MCU | Microchip Technology
ATMEGA328P-15MZ

ATMEGA328P-15MZ 32KB 8-Bit AVR MCU | Microchip Technology

The Microchip Technology ATMEGA328P-15MZ is an 8-bit AVR RISC microcontroller with 32 KB of in-system programmable flash, 1024 bytes of EEPROM, 2 KB of SRAM, and 23 general-purpose I/O lines, packaged in a 32-pin QFN with exposed pad. It combines a high-performance, low-power AVR core with 131 instructions, 32 working registers, and three flexible timer/counter blocks for compact embedded-control designs. An AVR microcontroller is a type of 8-bit embedded microcontroller that executes a reduced-instruction-set computer architecture with program memory, data memory, general-purpose I/O, timers, and serial interfaces integrated on one semiconductor device. Within the product hierarchy, ATmega328P devices combine a general-purpose RISC processor with flash program storage, SRAM, EEPROM, and communication peripherals for applications where a small, deterministic embedded controller is preferable to a general-purpose processor. The verified data identifies the device as a low-power AVR device with 131 instructions, mostly single-clock-cycle execution, 32 general-purpose working registers, and three timer/counter blocks. Its 32 KB flash supports in-system programming, while 1024 bytes of EEPROM provides nonvolatile data storage. The reported 23 general-purpose I/O lines make the controller suitable for boards that need several discrete inputs and outputs while retaining an integrated, compact implementation. Communication and timing resources support embedded product development across common industrial, consumer, and educational platforms. The verified family description includes I2C, SPI, and UART/USART-style connectivity in the ATmega328P family, while the timers support timing, input capture, output compare, and PWM-oriented control functions. Compared with a discrete logic controller, the integrated approach reduces the number of external ICs required for basic sensing, actuation, and communication tasks. Typical uses include Arduino-compatible embedded boards, data-acquisition front ends, simple industrial controllers, educational instruments, and low-power standalone products. The ATMEGA328P family is especially recognizable in compact hobbyist and maker platforms, but the same integrated resources can serve production designs that require flash-resident firmware, EEPROM parameters, serial links, and precise timer-based control. Designers should verify the exact clock, voltage, temperature, pin, and fuse limits against the manufacturer documentation because the supplied web results present conflicting clock and supply-range descriptions. The -15MZ ordering code and some search snippets indicate a restricted speed grade, while other snippets list 16 MHz or 20 MHz for related variants. PCB layouts should preserve the exposed-pad land pattern, provide the required bypass capacitors, and follow the manufacturer guidance for programming and clock implementation. This page consolidates the verified memory, core, package, interface, lifecycle, pricing-reference, and cross-reference information for ATMEGA328P-15MZ. It also adds package-specific selection guidance, qualified drop-in comparison points, and practical design considerations so engineers can distinguish a true PCB-compatible replacement from a merely similar AVR or 8-bit MCU.

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ATMEGA328P-AN - 8-Bit 20MHz AVR MCU 32KB Flash | Microchip
ATMEGA328P-AN

ATMEGA328P-AN - 8-Bit 20MHz AVR MCU 32KB Flash | Microchip

The Microchip Technology ATMEGA328P-AN is an 8-bit AVR RISC-based microcontroller with a 20 MHz maximum clock, 32 KB of ISP Flash memory, 2 KB SRAM, 1 KB EEPROM, and 23 general-purpose I/O lines, supplied in a 32-TQFP 7 mm × 7 mm package. It combines a low-power picoPower architecture with three flexible timer/counters, external interrupts, USART, and a byte-oriented Two-Wire serial interface. A microcontroller is a programmable integrated circuit that executes firmware, reads inputs, controls outputs, and manages embedded-system timing. The ATmega belongs to the AVR family of 8-bit RISC microcontrollers and sits within the broader embedded-controller and semiconductor hierarchy. Its in-system programming support makes it practical for designs assembled and programmed through ISP-compatible tools, while its serial interfaces support communication with sensors, converters, displays, and host systems. Verified product information identifies 32 KB Flash as 16K × 16 words, 2 KB SRAM, 1 KB EEPROM, 23 GPIO lines, 32 general-purpose working registers, three timer/counters with compare modes, USART, and Two-Wire Interface. The listed operating temperature is 105°C. These resources make the device suitable for compact control systems, sensor nodes, educational platforms, instruments, and Arduino-compatible embedded products. The ATMEGA328P-AN uses an 8-bit AVR processing core and provides read-while-write Flash capability. Its 32 general-purpose working registers support efficient data handling, while the three timer/counters support timing, compare, and event-based control. The USART provides serial communication, and the Two-Wire Interface provides a byte-oriented peripheral bus for compatible sensors and memory devices. Typical applications include low-cost embedded controllers, Arduino-compatible boards, environmental monitoring, motor and relay sequencing, data acquisition, simple instrumentation, and connected sensor nodes. The 20 MHz maximum clock and 2 KB SRAM provide useful headroom for compact real-time control, while the 32 KB Flash capacity is appropriate for moderate firmware sizes. Designers should preserve the exact 32-TQFP footprint and pin assignments of the target device, provide the required clock, reset, power, and decoupling connections, and confirm toolchain compatibility before substitution. The manufacturer product page and authorized distributor data are the appropriate sources for final electrical, timing, package, and programming details.

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ATMEGA328P-ANR - 8-Bit 20MHz AVR MCU 32KB Flash | Microchip (Tape & Reel)
ATMEGA328P-ANR

ATMEGA328P-ANR - 8-Bit 20MHz AVR MCU 32KB Flash | Microchip (Tape & Reel)

The Microchip Technology ATMEGA328P-ANR is an 8-bit AVR RISC-based microcontroller with a 20 MHz maximum clock, 32 KB of ISP Flash memory, 2 KB SRAM, 1 KB EEPROM, and 23 general-purpose I/O lines, supplied in a 32-TQFP 7 mm × 7 mm package. It combines a low-power picoPower architecture with three flexible timer/counters, external interrupts, USART, and a byte-oriented Two-Wire serial interface. A microcontroller is a programmable integrated circuit that executes firmware, reads inputs, controls outputs, and manages embedded-system timing. The ATmega belongs to the AVR family of 8-bit RISC microcontrollers and sits within the broader embedded-controller and semiconductor hierarchy. Its in-system programming support makes it practical for designs assembled and programmed through ISP-compatible tools, while its serial interfaces support communication with sensors, converters, displays, and host systems. Verified product information identifies 32 KB Flash as 16K × 16 words, 2 KB SRAM, 1 KB EEPROM, 23 GPIO lines, 32 general-purpose working registers, three timer/counters with compare modes, USART, and Two-Wire Interface. The listed operating temperature is 105°C. These resources make the device suitable for compact control systems, sensor nodes, educational platforms, instruments, and Arduino-compatible embedded products. The ATMEGA328P-ANR uses an 8-bit AVR processing core and provides read-while-write Flash capability. Its 32 general-purpose working registers support efficient data handling, while the three timer/counters support timing, compare, and event-based control. The USART provides serial communication, and the Two-Wire Interface provides a byte-oriented peripheral bus for compatible sensors and memory devices. Typical applications include low-cost embedded controllers, Arduino-compatible boards, environmental monitoring, motor and relay sequencing, data acquisition, simple instrumentation, and connected sensor nodes. The 20 MHz maximum clock and 2 KB SRAM provide useful headroom for compact real-time control, while the 32 KB Flash capacity is appropriate for moderate firmware sizes. Designers should preserve the exact 32-TQFP footprint and pin assignments of the target device, provide the required clock, reset, power, and decoupling connections, and confirm toolchain compatibility before substitution. The manufacturer product page and authorized distributor data are the appropriate sources for final electrical, timing, package, and programming details.

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ATMEGA328P-AU - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip
ATMEGA328P-AU

ATMEGA328P-AU - 8-bit AVR MCU 20MHz 32KB Flash TQFP-32 | Microchip

The Microchip Technology ATMEGA328P-AU is a high-performance, low-power 8-bit AVR RISC microcontroller executing up to 20 MIPS at 20 MHz, with 32 KB ISP Flash, 1 KB EEPROM, and 2 KB SRAM in a 32-pin TQFP (7x7 mm, 0.8 mm pitch) package. An 8-bit microcontroller is a single-chip computer combining an 8-bit CPU, program memory, data memory, and peripherals on one die. Within the embedded-system hierarchy, MCUs sit at the top of the control chain, orchestrating sensors, actuators, and communication interfaces. The AVR architecture uses Harvard organization with separate program and data buses, enabling most instructions to execute in a single clock cycle for deterministic real-time behavior. Key features include picoPower technology with six sleep modes (down to 0.2 uA typical in Power-down), a wide 1.8V to 5.5V operating voltage, two 8-bit timers plus one 16-bit timer, six PWM channels, an 8-channel 10-bit ADC, and USART, SPI, and I2C serial interfaces. The device supports In-System Programming via SPI and includes the debugWIRE on-chip debug system, reducing external debug hardware to a single wire. Technical depth: the non-volatile memory process guarantees 10,000 FLASH write/erase cycles and 20-year data retention per the Atmel/Microchip AVR family datasheet. A programmable watchdog timer with its own oscillator, an analog comparator, and an on-chip temperature sensor round out the peripheral set. The -AU suffix denotes the industrial-grade (-40C to +85C) TQFP-32 package variant. Typical applications include Arduino Uno and Nano compatible boards, IoT sensor nodes, motor control, consumer appliances, and educational platforms. The wide voltage range and picoPower sleep modes make it especially attractive for battery-powered sensor nodes. Design tip: place 100 nF decoupling capacitors close to VCC and AVCC; use the internal 8 MHz RC oscillator for cost-sensitive designs or an external crystal for UART-critical accuracy. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.

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ATMEGA328P-AUR - 8-bit AVR MCU, 32KB Flash, 20MHz, TQFP-32 | Microchip
ATMEGA328P-AUR

ATMEGA328P-AUR - 8-bit AVR MCU, 32KB Flash, 20MHz, TQFP-32 | Microchip

The Microchip Technology ATMEGA328P-AUR is an 8-bit AVR RISC-based microcontroller (MCU) delivering 20 MIPS throughput at 20 MHz, integrating 32 KB of in-system programmable Flash, 2 KB SRAM, and 1 KB EEPROM in a 32-pin TQFP (7x7 mm) package supplied on tape and reel. According to the verified distributor data, the device supports an operating voltage range of 1.8 V to 5.5 V and is qualified for the industrial temperature range of -40 C to +85 C. An 8-bit AVR microcontroller is a single-chip computer based on the Harvard-architecture AVR enhanced RISC core that executes most instructions in a single clock cycle, providing deterministic throughput close to 1 MIPS per MHz. Within the broader hierarchy, the AVR belongs to the microcontroller family, which sits under embedded processors, semiconductors, and finally integrated circuits. The ATmega328P is the highest-memory variant in the ATmega48/88/168/328P family, making it the de-facto choice for hobbyist platforms such as the Arduino Uno and for cost-sensitive industrial control nodes. Key features include 23 programmable I/O lines, two 8-bit timers plus one 16-bit timer, a 10-bit ADC with up to 8 channels, six PWM channels, an analog comparator, and a full-duplex USART. Peripherals also include SPI, I2C (TWI), an internal calibrated oscillator, and six software-selectable power-saving modes that allow the MCU to drop below 1 uA in power-down. The RISC core provides 131 powerful instructions and up to 32 x 8 general-purpose working registers, enabling C-compiled firmware to execute efficiently within the tight 2 KB SRAM. The architecture uses a two-stage pipeline with multi-cycle hardware multipliers and a separate instruction and data bus, which is what makes single-cycle instruction execution possible. The on-chip boot loader support, combined with in-system programming via SPI, lets firmware be updated in the field without removing the part. The integrated power-on reset and brown-out detector plus a watchdog timer with a separate on-chip oscillator harden unattended designs against supply glitches. Typical applications include Arduino-compatible boards, sensor interface nodes, consumer appliances, small motor control, industrial telemetry, USB-to-UART bridges, and educational kits. The combination of low BOM cost, broad toolchain support (AVR-GCC, Microchip Studio, Arduino IDE), and decades of design heritage makes the ATmega328P-AUR a default choice for both prototype and production designs. When designing with this part, note that the -AU/-AUR suffix designates the 32-pin TQFP package, so PCB layout and pinout diagrams from the ATmega328P datasheet family apply directly. Ensure decoupling of VCC/AVCC with 100 nF plus 10 uF bulk capacitance placed close to the pins, and route the RESET line away from switching nodes to avoid spurious resets in noisy environments. This page synthesizes distributor pricing, drop-in alternatives within the AVR family, and practical design notes not found in the manufacturer datasheet, giving the engineer a single reference for sourcing and design decisions.

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ATMEGA328P-MMH - 20MHz 32KB 8-Bit AVR MCU | Microchip Technology
ATMEGA328P-MMH

ATMEGA328P-MMH - 20MHz 32KB 8-Bit AVR MCU | Microchip Technology

The Microchip Technology ATMEGA328P-MMH is a 20 MHz, 8-bit AVR RISC microcontroller with 32 KB of ISP Flash memory, 2 KB of SRAM, and 1 KB of EEPROM in a 28-VQFN 4 x 4 mm package. It provides 23 general-purpose I/O lines and 32 working registers, while supporting I2C, SPI, and UART/USART communication interfaces. The device is identified by the Microchip product page as a picoPower AVR microcontroller designed around Microchip's high-performance, low-power AVR architecture. An 8-bit microcontroller is a compact embedded-processing IC that executes instructions from nonvolatile program memory and uses general-purpose I/O to control sensors, communications links, indicators, and actuators. Within the product hierarchy, the ATMEGA328P is an AVR microcontroller, an 8-bit RISC MCU, a semiconductor, and a member of the broader embedded-processing category. Its combination of Flash, SRAM, EEPROM, and integrated serial interfaces supports standalone control without requiring external program or data memory. Three headline capabilities define the ATMEGA328P-MMH: a 20 MHz maximum clock, 32 KB of Flash program storage, and 2 KB of SRAM. The manufacturer lists 32 KB of ISP Flash with read-while-write capability, 1 KB of EEPROM, 23 general-purpose I/O lines, and 32 general-purpose working registers. The device also provides 131 powerful instructions with most instructions executing in a single clock cycle, supporting efficient event-driven and control-oriented firmware. The ATMEGA architecture integrates serial communication capabilities directly into the microcontroller. The verified distributor and comparison results identify I2C, SPI, and UART/USART interfaces, allowing the device to connect with sensors, external nonvolatile memory, transceivers, and host systems. Because ATMEGA328P-MMH is a surface-mount VQFN device, its 28-pin land pattern is intended for automated assembly and compact embedded boards rather than breadboard prototyping. Typical uses include Arduino-compatible embedded controllers, compact sensor nodes, LED and display controllers, USB-to-serial data acquisition systems, industrial control modules, and educational prototyping platforms. The ATMEGA328P family is particularly useful when moderate processing performance, deterministic I/O, and integrated serial interfaces matter more than a high-pin-count processor or external memory bus. Designers should verify the exact oscillator, reset, and power circuitry against the manufacturer documentation before layout. Because no numerical pinout was included in the supplied verified records, this page does not invent pin names or numbering. The 28-VQFN footprint also requires careful exposed-pad, paste, stencil, and reflow design, while the 4 x 4 mm package can make assembly inspection and rework more demanding than a leaded package. This page combines verified manufacturer specifications, distributor availability information, same-package alternatives, and practical implementation guidance. It distinguishes published ATMEGA328P-MMH facts from unresolved values and highlights the memory, package, and firmware implications engineers should verify before selecting a replacement or releasing a PCB design.

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ATMEGA328P-MMHR - 20MHz 32KB Flash 8-Bit MCU | Microchip
ATMEGA328P-MMHR

ATMEGA328P-MMHR - 20MHz 32KB Flash 8-Bit MCU | Microchip

The Microchip ATMEGA328P-MMHR is an 8-bit AVR microcontroller with a 20 MHz maximum clock, 32 KB of in-system programmable Flash, 2 KB of SRAM, 1 KB of EEPROM, and 23 general-purpose I/O lines in a 28-pin VQFN package measuring 4 x 4 mm. The MMHR ordering code identifies the compact surface-mount configuration used in space-constrained embedded systems. An 8-bit AVR microcontroller is a programmable semiconductor that combines a CPU core, Flash program memory, SRAM, EEPROM, timers, serial interfaces, and GPIO in one integrated circuit. Within the product hierarchy, it belongs to the AVR family of reduced-instruction-set microcontrollers, commonly called an MCU. Its integrated memory and peripherals allow a compact embedded design to replace separate processor, program-memory, and interface components. The ATMEGA328P-MMHR provides 32 KB of read-while-write Flash, 2 KB of SRAM, and 1 KB of EEPROM according to the manufacturer-family datasheet result. Its feature set includes 32 general-purpose working registers, 23 I/O lines, a real-time counter, three flexible timer/counter blocks with compare and PWM modes, one USART, one two-wire serial interface, and a six-channel 10-bit ADC. These resources support compact control, sensing, communications, and actuator workloads. The enhanced RISC-based AVR architecture executes most instructions in a single clock cycle, while the device supports clock frequencies up to 20 MHz for the ATMEGA328P-MMHR listing. Its peripherals reduce the need for external logic: PWM channels can drive indicators or power stages, the ADC can sample analog inputs, and the USART and I2C interface can connect sensors, displays, and service adapters. The 28-pin VQFN also supports high-density PCB placement, although its exposed-pad construction requires careful thermal design. Typical uses include Arduino-compatible sensor nodes, compact industrial controllers, LED and motor-control boards, environmental monitoring products, and low-cost connected instruments. The 23 I/O lines provide external signal connections, while the 1 KB EEPROM is useful for retaining small configuration values. The 20 MHz clock also provides sufficient timing resolution for common control-loop, communication, and measurement tasks. When laying out a board, follow the manufacturer pinout and land-pattern requirements rather than relying on generic QFN conventions. Provide the required supply decoupling at the power pins, route the exposed pad according to the package thermal guidance, and keep sensitive analog inputs away from high-current switching paths. Confirm the selected crystal or clock arrangement, programming interface, and fuse settings before releasing a production PCB. This page consolidates verified distributor specifications, source-linked pricing and availability information, package details, and practical selection guidance. It also distinguishes a genuine same-package drop-in candidate from other ATmega devices whose package, pin count, or device features prevent unqualified substitution.

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ATMEGA328P-MN - AVR 8-bit MCU 20MHz 32KB Flash 32-VQFN | Microchip
ATMEGA328P-MN

ATMEGA328P-MN - AVR 8-bit MCU 20MHz 32KB Flash 32-VQFN | Microchip

The Microchip (formerly Atmel) ATMEGA328P-MN is an 8-bit AVR RISC microcontroller featuring 32 KB of in-system self-programmable Flash, 2 KB SRAM, and 1 KB EEPROM, operating at up to 20 MHz and housed in a 32-pin VQFN (5x5 mm) package. It integrates 23 programmable I/O lines, six 10-bit ADC channels, one 16-bit timer/counter with separate prescaler and compare mode, and two 8-bit timer/counters together with a hardware USART, SPI, and TWI (I2C) interface. The supply voltage range spans 1.8 V to 5.5 V with throughput up to 20 MIPS, supporting both battery-powered and industrial 5 V rails. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program, SRAM for data, EEPROM for non-volatile storage), and programmable peripherals on one die. The ATmega328P belongs to the AVR enhanced RISC architecture family, which executes most instructions in a single clock cycle, enabling deterministic timing essential for real-time embedded control. Within the broader taxonomy, the ATmega328P-MN is a microcontroller -> embedded processor -> semiconductor device, and is the canonical MCU used on Arduino Uno and Arduino Nano carrier boards. Key features include 131 RISC instructions, a debugWIRE on-chip debug interface, six PWM channels, a 10-bit ADC, programmable watchdog timer with separate on-chip oscillator, and five software-selectable power-saving modes that drop quiescent current below 1 µA in power-down mode. Internal 8 MHz and 128 kHz RC oscillators reduce external component count for cost-sensitive designs. The device is built on a low-power CMOS process with an advanced Harvard architecture that separates program and data buses for simultaneous fetch and write, achieving throughput up to 20 MIPS at 20 MHz. Hardware multipliers and true single-cycle execution make it well suited to deterministic control loops in sensor processing and communication bridging. Typical applications include Arduino-compatible maker boards, consumer appliance controllers, sensor data acquisition nodes, battery-powered IoT endpoints, industrial 4-20 mA loop interfaces, and hobby/educational platforms. Designers choose the ATmega328P-MN for its mature toolchain (avr-gcc, Arduino IDE, Atmel Studio), abundant reference designs, and the broad availability of code libraries. Design tip: When migrating from the plastic DIP-28 (ATMEGA328P-PU) footprint used on the classic Arduino Uno to the QFN-32 package, ensure your PCB includes a thermal pad with at least 6 ground vias to dissipate the package's heat under high CPU load, and use a 0.5 mm pitch land pattern that respects the JEDEC MSL3 moisture sensitivity. This page synthesizes live distributor pricing, drop-in VQFN-32 alternatives (ATMEGA328PB-MN, ATMEGA328-MN, ATMEGA168P-MN), and engineering guidance not aggregated on a single OEM datasheet page.

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ATMEGA328P-MNR - AVR 8-bit MCU 20MHz 32KB Flash 32-VQFN | Microchip (Tape & Reel)
ATMEGA328P-MNR

ATMEGA328P-MNR - AVR 8-bit MCU 20MHz 32KB Flash 32-VQFN | Microchip (Tape & Reel)

The Microchip (formerly Atmel) ATMEGA328P-MNR is an 8-bit AVR RISC microcontroller featuring 32 KB of in-system self-programmable Flash, 2 KB SRAM, and 1 KB EEPROM, operating at up to 20 MHz and housed in a 32-pin VQFN (5x5 mm) package. It integrates 23 programmable I/O lines, six 10-bit ADC channels, one 16-bit timer/counter with separate prescaler and compare mode, and two 8-bit timer/counters together with a hardware USART, SPI, and TWI (I2C) interface. The supply voltage range spans 1.8 V to 5.5 V with throughput up to 20 MIPS, supporting both battery-powered and industrial 5 V rails. A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash for program, SRAM for data, EEPROM for non-volatile storage), and programmable peripherals on one die. The ATmega328P belongs to the AVR enhanced RISC architecture family, which executes most instructions in a single clock cycle, enabling deterministic timing essential for real-time embedded control. Within the broader taxonomy, the ATmega328P-MN is a microcontroller -> embedded processor -> semiconductor device, and is the canonical MCU used on Arduino Uno and Arduino Nano carrier boards. Key features include 131 RISC instructions, a debugWIRE on-chip debug interface, six PWM channels, a 10-bit ADC, programmable watchdog timer with separate on-chip oscillator, and five software-selectable power-saving modes that drop quiescent current below 1 µA in power-down mode. Internal 8 MHz and 128 kHz RC oscillators reduce external component count for cost-sensitive designs. The device is built on a low-power CMOS process with an advanced Harvard architecture that separates program and data buses for simultaneous fetch and write, achieving throughput up to 20 MIPS at 20 MHz. Hardware multipliers and true single-cycle execution make it well suited to deterministic control loops in sensor processing and communication bridging. Typical applications include Arduino-compatible maker boards, consumer appliance controllers, sensor data acquisition nodes, battery-powered IoT endpoints, industrial 4-20 mA loop interfaces, and hobby/educational platforms. Designers choose the ATmega328P-MN for its mature toolchain (avr-gcc, Arduino IDE, Atmel Studio), abundant reference designs, and the broad availability of code libraries. Design tip: When migrating from the plastic DIP-28 (ATMEGA328P-PU) footprint used on the classic Arduino Uno to the QFN-32 package, ensure your PCB includes a thermal pad with at least 6 ground vias to dissipate the package's heat under high CPU load, and use a 0.5 mm pitch land pattern that respects the JEDEC MSL3 moisture sensitivity. This page synthesizes live distributor pricing, drop-in VQFN-32 alternatives (ATMEGA328PB-MN, ATMEGA328-MN, ATMEGA168P-MN), and engineering guidance not aggregated on a single OEM datasheet page.

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ATMEGA328P-MU - 8-bit AVR MCU 20MHz 32KB Flash VQFN-32
ATMEGA328P-MU

ATMEGA328P-MU - 8-bit AVR MCU 20MHz 32KB Flash VQFN-32

The Microchip Technology ATMEGA328P-MU is an 8-bit AVR RISC microcontroller running up to 20 MHz, integrating 32 KB of In-System-Programmable Flash, 2 KB SRAM, and 1 KB EEPROM in a 32-pin VQFN (5x5 mm) surface-mount package. It operates from a 1.8 V to 5.5 V supply, delivers up to 20 MIPS, and provides 23 general-purpose I/O lines plus a 6+2-channel 10-bit ADC. An 8-bit microcontroller (MCU) is a single-chip computing subsystem that combines a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), non-volatile data storage (EEPROM), and a rich set of peripherals such as timers, ADC, and communication interfaces. MCUs sit at the heart of embedded systems, bridging the gap between simple logic ICs and application processors in the broader semiconductor hierarchy, and are typically deployed where deterministic real-time control, low power, and cost efficiency are paramount. Key features of the ATMEGA328P-MU include 131 single-cycle RISC instructions, picoPower technology with multiple sleep modes for battery-powered systems, two 8-bit timers plus one 16-bit timer, a master/slave SPI interface, an I2C-compatible TWI, and a programmable USART. The P-suffix denotes the picoPower variant, with internal 8 MHz and 128 kHz calibrated RC oscillators that minimize external component count. On-chip debug is supported via debugWIRE and In-System Programming (ISP) enables field firmware upgrades without desoldering. Architecturally, the ATmega328P uses an AVR Harvard-architecture RISC core with 32 general-purpose working registers directly connected to the ALU, allowing two independent registers to be accessed in a single instruction executed in one clock cycle. The QFN-32 (5x5 mm) package exposes two extra ADC inputs (ADC6, ADC7) compared to the PDIP-28, and provides a low thermal resistance path through the exposed pad for improved heat dissipation at 20 MHz / 5 V operation. Typical applications include Arduino-compatible boards (Uno, Nano, Pro Mini), industrial sensor nodes, consumer appliances, hobby robotics, battery-powered instrumentation, and LED lighting controllers. Its 1.8 V to 5.5 V operating range supports both 3.3 V and 5 V rails, and the rich timer set enables precise PWM motor control and switching-mode LED dimming. When designing with this device, place a 100 nF decoupling capacitor on each AVCC and VCC pin, keep the analog reference (AREF) quiet with its own bypass capacitor, and ensure the exposed thermal pad is soldered to a ground copper pour to meet the datasheet's 31 C/W theta-JA thermal budget. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in a single manufacturer datasheet, as of 2026-10-07.

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ATMEGA328P-MUR - 8-bit AVR MCU 20MHz 32KB Flash VQFN-32 (Tape & Reel)
ATMEGA328P-MUR

ATMEGA328P-MUR - 8-bit AVR MCU 20MHz 32KB Flash VQFN-32 (Tape & Reel)

The Microchip Technology ATMEGA328P-MUR is an 8-bit AVR RISC microcontroller running up to 20 MHz, integrating 32 KB of In-System-Programmable Flash, 2 KB SRAM, and 1 KB EEPROM in a 32-pin VQFN (5x5 mm) surface-mount package. It operates from a 1.8 V to 5.5 V supply, delivers up to 20 MIPS, and provides 23 general-purpose I/O lines plus a 6+2-channel 10-bit ADC. An 8-bit microcontroller (MCU) is a single-chip computing subsystem that combines a CPU core, non-volatile program memory (Flash), volatile data memory (SRAM), non-volatile data storage (EEPROM), and a rich set of peripherals such as timers, ADC, and communication interfaces. MCUs sit at the heart of embedded systems, bridging the gap between simple logic ICs and application processors in the broader semiconductor hierarchy, and are typically deployed where deterministic real-time control, low power, and cost efficiency are paramount. Key features of the ATMEGA328P-MUR include 131 single-cycle RISC instructions, picoPower technology with multiple sleep modes for battery-powered systems, two 8-bit timers plus one 16-bit timer, a master/slave SPI interface, an I2C-compatible TWI, and a programmable USART. The P-suffix denotes the picoPower variant, with internal 8 MHz and 128 kHz calibrated RC oscillators that minimize external component count. On-chip debug is supported via debugWIRE and In-System Programming (ISP) enables field firmware upgrades without desoldering. Architecturally, the ATmega328P uses an AVR Harvard-architecture RISC core with 32 general-purpose working registers directly connected to the ALU, allowing two independent registers to be accessed in a single instruction executed in one clock cycle. The QFN-32 (5x5 mm) package exposes two extra ADC inputs (ADC6, ADC7) compared to the PDIP-28, and provides a low thermal resistance path through the exposed pad for improved heat dissipation at 20 MHz / 5 V operation. Typical applications include Arduino-compatible boards (Uno, Nano, Pro Mini), industrial sensor nodes, consumer appliances, hobby robotics, battery-powered instrumentation, and LED lighting controllers. Its 1.8 V to 5.5 V operating range supports both 3.3 V and 5 V rails, and the rich timer set enables precise PWM motor control and switching-mode LED dimming. When designing with this device, place a 100 nF decoupling capacitor on each AVCC and VCC pin, keep the analog reference (AREF) quiet with its own bypass capacitor, and ensure the exposed thermal pad is soldered to a ground copper pour to meet the datasheet's 31 C/W theta-JA thermal budget. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in a single manufacturer datasheet, as of 2026-10-07.

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