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ATMEGA325A-MU - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip
ATMEGA325A-MU

ATMEGA325A-MU - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip

The Microchip Technology ATMEGA325A-MU is an 8-bit AVR RISC microcontroller with 32 KB In-System Programmable Flash, 2 KB SRAM, 1 KB EEPROM, and a maximum clock frequency of 20 MHz, housed in a 64-pin QFN (9x9 mm) package with exposed pad. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, sitting within the broader hierarchy of microcontroller units (MCUs) embedded processors used to control a single function inside an electronic system. AVR MCUs from Microchip (originally Atmel) are widely used for their simplicity, low power, and rich peripheral integration on a single chip. Key features of the ATmega325A include 54 general purpose I/O lines, 32 general purpose working registers, in-system programmable Flash with read-while-write capability, a JTAG interface for on-chip debugging and boundary scan, and an incremental 10-bit ADC. The single-cycle execution model delivers up to 20 MIPS throughput at 20 MHz, allowing C-compiled code to approach the efficiency of 8-bit assembly. The AVR core combines a rich instruction set with 32 general purpose registers directly connected to the ALU, eliminating the accumulator bottleneck of classic 8051-style designs. Peripheral set includes USART, SPI, and two-wire (I2C-compatible) interfaces, plus multiple 8-bit and 16-bit timers with PWM outputs, enabling motor control, lighting, and communication tasks without external logic. Typical applications include industrial control panels and instrumentation, consumer appliances and HVAC controls, and battery-powered meters where the low-power idle and power-down modes extend battery life while 32 KB of Flash comfortably hosts protocol stacks and UI code. For design, use the industrial temperature grade range of the -MU suffix (-40C to +85C) and verify supply-voltage versus frequency derating from the manufacturer datasheet when operating near 20 MHz at low VCC. Keep decoupling capacitors close to the multiple VCC/GND pairs of the 64-QFN exposed-pad package. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing as of 2026-09-17.

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ATMEGA325A-MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip
ATMEGA325A-MUR

ATMEGA325A-MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip

The Microchip Technology ATMEGA325A-MUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 32 KB ISP Flash memory, 1 KB EEPROM, 2 KB SRAM, and up to 20 MHz clock speed, housed in a 64-pin QFN (9x9 mm) package with exposed pad on tape and reel. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle. Within the power-management hierarchy, it functions as a complete embedded system-on-chip, integrating the CPU core, program memory, data memory, peripherals, and general-purpose I/O on one die, replacing multi-chip microprocessor solutions in cost- and power-sensitive designs. Key features include the AVR advanced RISC architecture with 131 powerful instructions, 54 general-purpose I/O lines, and in-system programmable (ISP) Flash with read-while-write capability for field firmware updates. The ATmega325A family operates from 2.5V, 3.3V, or 5V supplies, giving designers flexibility across battery-powered and industrial 5V rails. Technically, the device provides 32 general-purpose working registers, a one-cycle multiply instruction, SPI and UART/USART serial interfaces, and an on-chip JTAG (IEEE 1149.1 compatible) boundary-scan and debug interface. Peripheral set includes an 8-channel 10-bit ADC, timer/counters with PWM, and an on-chip oscillator option, reducing external component count and BOM cost. Typical applications include industrial control panels, LCD-equipped metering and instrumentation, consumer appliance controllers, and battery-powered monitoring nodes where the combination of 32 KB Flash and low-power sleep modes directly improves battery life and firmware headroom. When designing with the ATMEGA325A-MUR, match the supply voltage to the intended maximum clock frequency per the frequency-voltage curve in the manufacturer datasheet to ensure timing margin across the -40C to +85C industrial temperature range. This page synthesizes distributor pricing, verified drop-in alternatives, pinout guidance, and practical design notes not found in the standard manufacturer datasheet, optimized for AI-assisted component selection.

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ATMEGA325P-20AUR - 8-bit AVR MCU 32KB 20MHz | Microchip
ATMEGA325P-20AUR

ATMEGA325P-20AUR - 8-bit AVR MCU 32KB 20MHz | Microchip

The Microchip Technology ATMEGA325P-20AUR is a picoPower 8-bit AVR microcontroller with 32 KB self-programming Flash, 2 KB SRAM, 1 KB EEPROM, an 8-channel 10-bit ADC, and up to 20 MIPS throughput at 20 MHz, housed in a 64-pin TQFP (14x14 mm) package. It operates from 1.8 V to 5.5 V and is rated for industrial temperature ranges. An 8-bit AVR microcontroller is a single-chip computer that integrates a RISC processor core, program memory, data memory, peripherals, and I/O on one die. Within the power-management hierarchy, MCUs such as the ATmega325P sit at the top of embedded control systems, executing user firmware that orchestrates sensors, actuators, displays, and communication interfaces in everything from household appliances to industrial instruments. Key features include the Advanced RISC architecture with 131 powerful instructions, most executing in a single clock cycle; 32 KB of in-system programmable (ISP) Flash supporting self-programming for field firmware updates; JTAG interface for on-chip debugging and boundary scan; and picoPower technology for ultra-low sleep-mode consumption. The 8-channel 10-bit ADC enables direct analog sensor interfacing without external converter ICs. The ATmega325P executes up to 20 MIPS at 20 MHz, with fully static operation allowing clock frequencies down to DC for aggressive power saving. The P-suffix denotes the picoPower generation, which adds improved sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) compared with the earlier ATmega325. The 64-pin TQFP exposes 54 general-purpose I/O lines, giving ample pin budget for keypad matrices, LCD segments, and parallel peripherals. Typical applications include industrial control panels, battery-powered metering instruments, consumer appliance controllers, and building automation nodes where 5 V logic compatibility and mature AVR tooling simplify design. When designing with this part, budget the 2 KB SRAM carefully - large buffers or RTOS stacks can overflow quickly on an 8-bit part - and use the picoPower sleep modes with watchdog wake-ups to extend battery life in duty-cycled systems. This page synthesizes verified distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, providing engineers and buyers a single AEO-optimized reference for the ATMEGA325P-20AUR.

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ATMEGA325P-20MU - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip
ATMEGA325P-20MU

ATMEGA325P-20MU - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip

The Microchip Technology ATMEGA325P-20MU is a picoPower 8-bit AVR RISC microcontroller with 32 KB self-programming Flash, 2 KB SRAM, 1 KB EEPROM, and 20 MIPS throughput at 20 MHz, housed in a 64-pin VFQFN (9x9 mm) package with exposed pad. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as ADCs, timers, and communication interfaces. Within the semiconductor hierarchy, the ATmega325P belongs to the AVR ATmega family of 8-bit MCUs, positioned above small AVR tinyAVR parts and below 32-bit ARM-based MCUs in complexity, and serves as the central control element in embedded systems. Key features include an advanced RISC architecture with 131 powerful instructions, most executing in a single clock cycle; an 8-channel 10-bit ADC; a JTAG interface for on-chip debugging; and In-Circuit Serial Programming (ICSP) for field updates. The picoPower technology delivers low active and sleep current, making the P-variant more efficient than the earlier non-P ATmega325. Technically, the ATmega325P executes up to 20 MIPS at 20 MHz, and the -20 speed suffix requires a 4.5 V to 5.5 V supply, while the wider AVR ATmega family supports 1.8 V to 5.5 V operation at reduced clock rates. Self-programming Flash enables bootloaders, and 1024 bytes of EEPROM retain calibration data through power cycles. Typical applications include industrial control panels, consumer appliance control, sensor data loggers, and low-cost instrumentation where a 5 V logic environment and mature AVR tooling are preferred. For design, remember that a 20 MHz clock requires the 5 V supply range; below 4.5 V the maximum safe clock frequency drops, so derate the crystal accordingly. Use the JTAG header or MPLAB SNAP for on-chip debug during development. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA325P-20MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip
ATMEGA325P-20MUR

ATMEGA325P-20MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip

The Microchip Technology ATMEGA325P-20MUR is an 8-bit AVR ATmega microcontroller with 32 KB self-programming In-System-Programmable Flash, 2 KB SRAM, 1 KB EEPROM, an 8-channel 10-bit ADC, and JTAG on-chip debug, executing up to 20 MIPS at 20 MHz in a 64-pin QFN (9x9 mm) exposed-pad package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that fetches instructions and data over separate buses, allowing most of its 131 instructions to execute in a single clock cycle. Within the power-management hierarchy, the ATmega family sits as a standalone general-purpose MCU, spanning Flash densities from 16 KB to 256 KB and serving as the computing core for embedded control systems that previously required multiple discrete logic ICs. Key features include picoPower technology for extremely low sleep-mode consumption, a wide 1.8V to 5.5V operating range that supports both battery and 5V industrial rails, and 20 MIPS peak throughput at 20 MHz for demanding real-time loops. The P-suffix picoPower grade distinguishes this die from the earlier ATmega325 with lower active and idle current. On-chip JTAG enables boundary-scan, programming, and in-circuit debugging without additional sockets. Architecturally, the device pairs the AVR RISC core with 32 KB of self-programmable Flash organized as 16K x 16, allowing firmware updates in the field through a boot loader section. Peripheral integration includes two 8-bit timers, two 16-bit timers, a USART, SPI, two-wire interface (I2C), analog comparator, and the 8-channel 10-bit ADC with internal bandgap reference. Typical applications include industrial sensor nodes and automation controls leveraging the 1.8V to 5.5V tolerance, battery-powered metering instruments exploiting picoPower sleep modes, and consumer appliances using the ADC plus USART for human-machine interfaces. The 64-pin QFN footprint also suits compact automotive-style HMI panels when paired with the LCD-equipped family siblings. Design consideration: derive the supply rail carefully because the 20 MHz speed grade requires 4.5V to 5.5V operation; at 2.7V the maximum rated clock drops to 10 MHz, so check your frequency-versus-voltage curve before finalizing the crystal selection. This page synthesizes distributor pricing, drop-in same-package alternatives, and design guidance not consolidated in the manufacturer datasheet.

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ATMEGA325PA-AU - 32KB Flash AVR MCU 20MHz TQFP-64 | Microchip
ATMEGA325PA-AU

ATMEGA325PA-AU - 32KB Flash AVR MCU 20MHz TQFP-64 | Microchip

The Microchip Technology ATMEGA325PA-AU is a picoPower 8-bit AVR ATmega microcontroller with 32 KB self-programming Flash, 2 KB SRAM, and 1 KB EEPROM, delivering up to 20 MIPS throughput at 20 MHz in a 64-pin TQFP (14 x 14 mm, 0.8 mm pitch) package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in which Flash program memory, SRAM data memory, and EEPROM are integrated on a single chip alongside peripherals, making it the central control element of an embedded system. Within the power-management IC hierarchy, the ATmega family sits at the MCU level of a broader semiconductor taxonomy: microcontroller -> embedded processor -> integrated circuit. The AVR RISC core executes most of its 131 instructions in a single clock cycle, which is why throughput is measured in MIPS equal to clock frequency. Key features include 1.8 V to 5.5 V operation across the full speed range, Microchip picoPower technology for nanoamp-class sleep-mode current, an 8-channel 10-bit ADC, and a JTAG interface supporting on-chip debug and boundary scan. Self-programming Flash enables in-application firmware updates and bootloaders without an external programmer beyond initial ICSP. Technically, the picoPower ATmega325PA improves on the earlier ATmega325P with reduced power consumption in all sleep modes, which matters in battery-powered designs where the MCU spends most of its life in power-down. The AVR core's single-cycle execution and register file of 32 general-purpose working registers keep interrupt latency short and deterministic, valuable in real-time control loops. Typical applications include industrial sensor nodes and HMI front ends, battery-powered meters and data loggers, and hobbyist or commercial embedded controllers requiring 5 V tolerance and legacy AVR tooling compatibility. A key design consideration: maximum safe clock frequency depends on supply voltage - at 5 V the part runs to 20 MHz, but at lower VCC the 20 MHz figure may not be guaranteed across the full data-sheet curve, so verify the frequency-versus-voltage graph in the manufacturer datasheet before over-clocking near the low-voltage end. This page synthesizes distributor pricing, drop-in alternatives within the ATmega325/329/645 family, pinout data, and practical design notes not consolidated in the manufacturer datasheet.

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ATMEGA325PA-AUR - 8-bit AVR MCU 32KB Flash 20MHz | Microchip
ATMEGA325PA-AUR

ATMEGA325PA-AUR - 8-bit AVR MCU 32KB Flash 20MHz | Microchip

The Microchip Technology ATMEGA325PA-AUR is a picoPower 8-bit AVR ATmega microcontroller featuring 32 KB of self-programming In-System Programmable (ISP) Flash program memory, 2 KB SRAM, 1 KB EEPROM, and an 8-channel 10-bit ADC, packaged in a 64-pin TQFP (14x14 mm) supplied on tape and reel. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle, positioning itself within the broader hierarchy of microcontroller units (MCUs) under embedded processors and power management systems. The AVR ATmega family is widely used for general-purpose embedded control where in-system programmability, EEPROM data retention, and low-power sleep modes are required. Key features include advanced RISC architecture with 131 powerful instructions, up to 20 MIPS throughput at 20 MHz, JTAG interface for on-chip debugging and boundary-scan, and picoPower technology for ultra-low power consumption in sleep and idle modes. The device operates from 1.8 V to 5.5 V, making it suitable for both battery-powered (3.3 V) and industrial 5 V systems. The picoPower process technology reduces quiescent current in all sleep modes, while the self-programming flash enables field firmware updates over UART, SPI, or the two-wire interface without external programmer hardware in the field. The 8-channel 10-bit ADC supports sensor front-ends, and the rich peripheral set includes USART, SPI, TWI (I2C), and timers with PWM outputs. Typical applications include industrial automation controllers, LCD-equipped metering and user-interface panels, battery-powered instrumentation, and building control nodes where 1.8-5.5 V operation and picoPower sleep currents extend battery life. A key design consideration: maximum clock frequency derates with supply voltage and temperature, so verify the speed-versus-voltage curve before running 20 MHz at reduced VCC in industrial temperature ranges. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing referenced as of 2026-09-17.

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ATMEGA325PA-MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip
ATMEGA325PA-MUR

ATMEGA325PA-MUR - 8-bit AVR MCU 32KB 20MHz 64-QFN | Microchip

The Microchip ATMEGA325PA-MUR is a picoPower 8-bit AVR RISC microcontroller with 32 KB self-programming Flash program memory, 2 KB SRAM, 1 KB EEPROM, and up to 20 MIPS throughput at 20 MHz, housed in a 64-pin QFN (MLF) 9x9 mm exposed-pad package. An 8-bit microcontroller integrates a processor core, memory, and peripherals on a single chip, forming the lowest tier of the embedded-processor hierarchy (MCU -> embedded processor -> semiconductor). AVR is a modified Harvard architecture with mostly single-cycle instruction execution, making it a popular alternative to PIC16-class and 8051-class MCUs for cost-sensitive embedded control. Key features include picoPower technology for ultra-low active and sleep current, an 8-channel 10-bit ADC, a JTAG interface for on-chip debugging and boundary scan, and wide 1.8V to 5.5V single-supply operation. The 131-instruction AVR core executes most instructions in a single clock cycle, and 32 general-purpose working registers keep interrupt latency low. Architecturally, the self-programming Flash allows in-system firmware updates via boot-loader code, while the separate EEPROM retains calibration data through power cycles. Advanced power-management modes (idle, power-save, power-down, standby) let designers trade wake-up latency against microamp-level sleep current, a hallmark of the picoPower A-series silicon. Typical applications include industrial sensor nodes, consumer appliance control panels, battery-powered metering, and HVAC/LCD user interfaces where a rich I/O count and ADC channels are required in a compact 9x9 mm footprint. A key design consideration is supply-voltage-dependent maximum clock speed: at 1.8V the safe operating frequency is derated substantially below 20 MHz, so consult the frequency-versus-voltage curve in the manufacturer datasheet before finalizing the oscillator design. This page synthesizes distributor pricing, verified drop-in alternatives within the AVR family, and practical design notes not found in the manufacturer datasheet alone.

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

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

The Microchip Technology ATMEGA325PV-10AUR is an 8-bit AVR ATmega microcontroller with 32KB flash memory, 2KB SRAM, 1KB EEPROM, and a maximum clock frequency of 10MHz, operating from a supply voltage as low as 1.8V in a 64-pin TQFP (14x14 mm) package supplied on tape and reel. An 8-bit microcontroller is an integrated circuit that executes program instructions on 8-bit-wide data words, combining a processor core, program flash, SRAM, EEPROM, and peripherals on a single chip. Within the power-management hierarchy, an MCU sits at the top of an embedded system, supervising sensors, actuators, displays, and communication interfaces. The AVR architecture uses a RISC load/store design with a two-stage pipeline that executes most instructions in a single clock cycle, delivering high MIPS-per-MHz efficiency. The P suffix in ATMEGA325PV denotes the picoPower technology generation, which reduces power consumption in all sleep modes, while the V suffix indicates a low-voltage operating range down to 1.8V. This makes the device well suited for battery-powered designs where every microamp matters. The 32KB (16K x 16) self-programmable flash supports in-system programming, and the 1KB EEPROM retains calibration and configuration data through power cycles. Peripheral integration includes a 10-bit ADC, USART, SPI, and two-wire serial interfaces, allowing direct attachment of analog sensors and digital peripherals without external glue logic. The industrial temperature rating supports deployment in uncontrolled environments. Typical applications include battery-powered metering, handheld instruments, industrial sensor nodes, and consumer appliance control boards where the low 1.8V operation extends battery life. When designing, budget flash and SRAM carefully: 2KB of SRAM is adequate for state machines and small buffers but not for large frame buffers. This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet.

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ATMEGA325PV-10MU - AVR 8-bit MCU 32KB 10MHz 64-QFN | Microchip
ATMEGA325PV-10MU

ATMEGA325PV-10MU - AVR 8-bit MCU 32KB 10MHz 64-QFN | Microchip

The Microchip Technology ATMEGA325PV-10MU is an 8-bit AVR ATmega microcontroller with 32KB (16K x 16) In-System Programmable Flash, 2KB SRAM, and 1KB EEPROM, executing at up to 10 MHz from a 1.8V to 5.5V supply, housed in a 64-pin QFN (9x9 mm) package with exposed pad. An 8-bit microcontroller is a single-chip computing device that integrates a processor core, program memory, data memory, and peripherals such as timers, UART, SPI, and ADC on one silicon die. The ATmega325P belongs to the AVR ATmega family, itself a subcategory of the broader 8-bit MCU / embedded processor hierarchy within Microchip's microcontroller portfolio, positioned for cost-sensitive embedded control. Key features include the AVR enhanced RISC architecture executing 131 powerful instructions, most in a single clock cycle; 32 general purpose I/O lines across 4 ports; and low-power picoPower-class operation. The device integrates an 8-channel 10-bit ADC, USART, SPI serial interface, and JTAG boundary-scan/debug capability per the AVR ATmega family datasheet. Architecturally, the ATmega325P uses a Harvard structure with separate program and data buses, allowing single-cycle instruction fetch while the previous instruction executes. The 32 x 8 general purpose register file is directly connected to the ALU, giving effective single-cycle throughput near 10 MIPS at 10 MHz. In-system self-programmable Flash enables field firmware updates. Typical applications include industrial control panels, consumer appliances, battery-powered instruments, and sensor front-ends where a 64-pin footprint, 32KB program memory, and industrial temperature grade are required. Design consideration: the 64-QFN exposed pad must be soldered to a ground plane for thermal and signal-integrity performance; verify voltage-frequency derating below 5.5V against the speed grade. This page synthesizes distributor data, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.

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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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