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ATTINY87-MU - 8-Bit 16MHz AVR MCU with LIN | Microchip
ATTINY87-MU

ATTINY87-MU - 8-Bit 16MHz AVR MCU with LIN | Microchip

The Microchip ATTINY87-MU is an 8-bit AVR RISC microcontroller with an operating frequency of 16 MHz, 8 KB of in-system programmable flash memory, and a 32-pin VQFN package measuring 5 mm by 5 mm. It includes 512 B of EEPROM, 512 B of SRAM, 16 general-purpose I/O lines, 32 working registers, and an 8-bit timer/counter with compare modes. The device also provides an LIN controller. An 8-bit microcontroller is a compact embedded controller used to read inputs, execute programmed logic, and control outputs in products such as automotive body modules, communication equipment, and industrial controls. The ATTINY87 belongs to the AVR family of 8-bit RISC-based microcontrollers and combines low-power operation, in-system programmability, timers, serial interfaces, and analog-control resources in one integrated circuit. Verified device features include 8 KB of ISP flash memory, 512 B of EEPROM, 512 B of SRAM, 16 general-purpose I/O lines, 32 general-purpose working registers, an 8-bit timer/counter with compare modes, and an 8-bit timer/counter. The 16 MHz operating frequency supports deterministic control-loop execution, while the integrated LIN controller makes the device suitable for local vehicle or industrial communication networks. The ATTINY87-MU is identified by the MU package suffix and is supplied in a 32-pin VQFN with an exposed pad according to the Arrow listing. The exposed thermal and electrical pad must be connected according to the manufacturer package guidance. Because the device is a compact surface-mount microcontroller, PCB layout, programming access, decoupling, and exposed-pad handling determine whether the expected performance is achieved. Typical applications include LIN-connected automotive modules, body-control and interface electronics, low-speed serial communication, sensor conditioning, actuator control, and compact embedded control boards. The 8 KB flash capacity is appropriate for small control firmware, while the SRAM and EEPROM support working state and nonvolatile configuration data. When designing around the ATTINY87-MU, verify the exact electrical limits, pin names, programming interface, clock configuration, and package recommendations against the current Microchip datasheet. Use the exposed pad as specified by the package design, place decoupling close to the supply pins, and confirm that the PCB footprint matches the 32-pin VQFN 5 mm by 5 mm package. This page combines verified product-page data, distributor availability information, and application guidance for engineers evaluating the ATTINY87-MU.

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ATTINY87-SU - 16MHz 8KB AVR MCU with LIN | Microchip
ATTINY87-SU

ATTINY87-SU - 16MHz 8KB AVR MCU with LIN | Microchip

The Microchip Technology ATTINY87-SU is an 8-bit AVR RISC-based microcontroller with a 16 MHz clock, 8 KB of in-system programmable Flash memory, and a 20-pin SOIC package. It provides 16 general-purpose I/O lines, 512 bytes of SRAM, and 512 bytes of EEPROM, making it suitable for compact embedded control, LIN-connected nodes, and low-power peripheral designs. The verified distributor listing identifies the device as the ATTINY87-SU, while the manufacturer describes the ATtiny87 family as a high-performance, low-power 8-bit AVR microcontroller. An 8-bit AVR microcontroller is a compact embedded-processing semiconductor that combines a CPU core, Flash program memory, SRAM, EEPROM, general-purpose I/O, and on-chip peripherals in one device. Within the product hierarchy, ATTINY87-SU belongs to the AVR family, ATtiny microcontrollers, microcontrollers, and integrated circuits. Its in-system programmability supports programming and reprogramming through the device programming interface, while the 16 MHz operating frequency provides a practical balance between processing throughput, power consumption, and peripheral timing. The key verified features are 8 KB Flash memory, 512 bytes of EEPROM, 512 bytes of SRAM, 16 general-purpose I/O lines, 16 MHz operation, and integrated connectivity identified by the verified comparison listing as I2C, LIN bus, SPI, and UART. The device is also identified as using 32 general-purpose working registers and an 8-bit timer/counter with compare modes. These resources are appropriate for embedded products that need deterministic control, serial communication, modest data storage, and a modest number of external connections. The ATTINY87-SU is especially relevant to LIN-connected automotive and transportation control modules, sensor nodes, actuator controllers, small industrial interfaces, and low-cost embedded automation products. Its 20-pin SOIC package supports conventional surface-mount assembly, while the 16 I/O lines allow the device to manage multiple discrete inputs and outputs. Compared with larger MCUs, the ATTINY87-SU emphasizes compactness and low power rather than high processing throughput or large memory capacity. Designers should verify the exact pin assignments, clock configuration, programming interface, and peripheral multiplexing against the Microchip ATtiny87 documentation before PCB release. Pay particular attention to the 20-pin SOIC footprint, power and ground connections, exposed communication pins, and the supply-voltage limits specified by the manufacturer datasheet. The verified source does not provide complete electrical limits, temperature ratings, or a complete pin table, so those details require datasheet confirmation. This page combines verified distributor specifications, manufacturer-family information, package details, sourcing references, and practical selection guidance for engineers evaluating the ATTINY87-SU. It is intended to help identify the correct AVR MCU, compare it with related devices, and plan a board-level design without assuming unverified electrical or package details.

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ATTINY87-SUR - 16MHz 8KB AVR MCU with LIN | Microchip (Tape & Reel)
ATTINY87-SUR

ATTINY87-SUR - 16MHz 8KB AVR MCU with LIN | Microchip (Tape & Reel)

The Microchip Technology ATTINY87-SUR is an 8-bit AVR RISC-based microcontroller with a 16 MHz clock, 8 KB of in-system programmable Flash memory, and a 20-pin SOIC package. It provides 16 general-purpose I/O lines, 512 bytes of SRAM, and 512 bytes of EEPROM, making it suitable for compact embedded control, LIN-connected nodes, and low-power peripheral designs. The verified distributor listing identifies the device as the ATTINY87-SUR, while the manufacturer describes the ATtiny87 family as a high-performance, low-power 8-bit AVR microcontroller. An 8-bit AVR microcontroller is a compact embedded-processing semiconductor that combines a CPU core, Flash program memory, SRAM, EEPROM, general-purpose I/O, and on-chip peripherals in one device. Within the product hierarchy, ATTINY87-SUR belongs to the AVR family, ATtiny microcontrollers, microcontrollers, and integrated circuits. Its in-system programmability supports programming and reprogramming through the device programming interface, while the 16 MHz operating frequency provides a practical balance between processing throughput, power consumption, and peripheral timing. The key verified features are 8 KB Flash memory, 512 bytes of EEPROM, 512 bytes of SRAM, 16 general-purpose I/O lines, 16 MHz operation, and integrated connectivity identified by the verified comparison listing as I2C, LIN bus, SPI, and UART. The device is also identified as using 32 general-purpose working registers and an 8-bit timer/counter with compare modes. These resources are appropriate for embedded products that need deterministic control, serial communication, modest data storage, and a modest number of external connections. The ATTINY87-SUR is especially relevant to LIN-connected automotive and transportation control modules, sensor nodes, actuator controllers, small industrial interfaces, and low-cost embedded automation products. Its 20-pin SOIC package supports conventional surface-mount assembly, while the 16 I/O lines allow the device to manage multiple discrete inputs and outputs. Compared with larger MCUs, the ATTINY87-SUR emphasizes compactness and low power rather than high processing throughput or large memory capacity. Designers should verify the exact pin assignments, clock configuration, programming interface, and peripheral multiplexing against the Microchip ATtiny87 documentation before PCB release. Pay particular attention to the 20-pin SOIC footprint, power and ground connections, exposed communication pins, and the supply-voltage limits specified by the manufacturer datasheet. The verified source does not provide complete electrical limits, temperature ratings, or a complete pin table, so those details require datasheet confirmation. This page combines verified distributor specifications, manufacturer-family information, package details, sourcing references, and practical selection guidance for engineers evaluating the ATTINY87-SUR. It is intended to help identify the correct AVR MCU, compare it with related devices, and plan a board-level design without assuming unverified electrical or package details.

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ATTINY87-XU - 16MHz 8-Bit AVR with LIN | Microchip
ATTINY87-XU

ATTINY87-XU - 16MHz 8-Bit AVR with LIN | Microchip

The Microchip Technology ATTINY87-XU is a low-power, 8-bit AVR RISC microcontroller with 8 KB of ISP Flash memory, 512 B of EEPROM, 512 B of SRAM, 16 general-purpose I/O lines, and a 16 MHz operating speed. The device includes an on-chip LIN controller and is supplied in a 20-pin TSSOP package. Its combination of compact memory, serial connectivity, and 16 I/O lines makes it suitable for embedded control, automotive accessories, sensor nodes, and small actuator systems. An 8-bit AVR microcontroller is a compact embedded processor in the hierarchy of microcontrollers, embedded processors, and semiconductor control devices. The AVR architecture uses a RISC instruction set and general-purpose working registers to execute control and communication firmware efficiently. ATTINY87-XU belongs to the ATtiny family and targets designs that need more connectivity than a basic minimal AVR while retaining a small 20-pin surface-mount footprint. Verified device features include 8 KB of In-System Programmable Flash, 512 B of nonvolatile EEPROM, 512 B of SRAM, 32 8-bit general-purpose working registers, an 8-bit timer/counter with compare modes, and 16 I/O lines. The manufacturer describes 123 powerful instructions, with most completing in a single clock cycle. Its integrated LIN controller supports communication designs where a dedicated network interface would otherwise increase component count. The ATTINY87 family uses Microchip AVR firmware tools and programming workflows. The verified results identify MPLAB Snap support using a High-Speed USB 2.0 computer interface, an 8-pin single-in-line connector to the target, and two device I/O pins plus the reset line for in-circuit debugging and In-Circuit Serial Programming. This makes firmware programming and debug access practical during prototype bring-up and production programming. Typical applications include LIN-connected automotive accessories, compact sensor interfaces, actuator controllers, building and industrial control nodes, low-power embedded instruments, and communication modules. In each case, the 16 MHz core, 8 KB program memory, and integrated serial interfaces reduce the need for external digital components. A key design consideration is selecting the correct package, pin mapping, clock arrangement, programming interface, and operating voltage before laying out a production PCB. Because the supplied excerpts do not include the complete pin table, voltage ranges, electrical limits, ADC details, or LIN timing values, those items must be verified in the official ATTINY87 documentation before release to manufacturing. This page consolidates manufacturer facts, distributor listings, package information, connectivity details, and application guidance. It also clearly identifies where complete pinout, electrical, pricing, lifecycle, and drop-in replacement data were not available in the verified excerpts, helping engineers separate confirmed specifications from information that still requires datasheet review.

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ATTINY87-XUR - 16MHz 8-Bit AVR with LIN | Microchip (Tape & Reel)
ATTINY87-XUR

ATTINY87-XUR - 16MHz 8-Bit AVR with LIN | Microchip (Tape & Reel)

The Microchip Technology ATTINY87-XUR is a low-power, 8-bit AVR RISC microcontroller with 8 KB of ISP Flash memory, 512 B of EEPROM, 512 B of SRAM, 16 general-purpose I/O lines, and a 16 MHz operating speed. The device includes an on-chip LIN controller and is supplied in a 20-pin TSSOP package. Its combination of compact memory, serial connectivity, and 16 I/O lines makes it suitable for embedded control, automotive accessories, sensor nodes, and small actuator systems. An 8-bit AVR microcontroller is a compact embedded processor in the hierarchy of microcontrollers, embedded processors, and semiconductor control devices. The AVR architecture uses a RISC instruction set and general-purpose working registers to execute control and communication firmware efficiently. ATTINY87-XUR belongs to the ATtiny family and targets designs that need more connectivity than a basic minimal AVR while retaining a small 20-pin surface-mount footprint. Verified device features include 8 KB of In-System Programmable Flash, 512 B of nonvolatile EEPROM, 512 B of SRAM, 32 8-bit general-purpose working registers, an 8-bit timer/counter with compare modes, and 16 I/O lines. The manufacturer describes 123 powerful instructions, with most completing in a single clock cycle. Its integrated LIN controller supports communication designs where a dedicated network interface would otherwise increase component count. The ATTINY87 family uses Microchip AVR firmware tools and programming workflows. The verified results identify MPLAB Snap support using a High-Speed USB 2.0 computer interface, an 8-pin single-in-line connector to the target, and two device I/O pins plus the reset line for in-circuit debugging and In-Circuit Serial Programming. This makes firmware programming and debug access practical during prototype bring-up and production programming. Typical applications include LIN-connected automotive accessories, compact sensor interfaces, actuator controllers, building and industrial control nodes, low-power embedded instruments, and communication modules. In each case, the 16 MHz core, 8 KB program memory, and integrated serial interfaces reduce the need for external digital components. A key design consideration is selecting the correct package, pin mapping, clock arrangement, programming interface, and operating voltage before laying out a production PCB. Because the supplied excerpts do not include the complete pin table, voltage ranges, electrical limits, ADC details, or LIN timing values, those items must be verified in the official ATTINY87 documentation before release to manufacturing. This page consolidates manufacturer facts, distributor listings, package information, connectivity details, and application guidance. It also clearly identifies where complete pinout, electrical, pricing, lifecycle, and drop-in replacement data were not available in the verified excerpts, helping engineers separate confirmed specifications from information that still requires datasheet review.

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ATTINY88-AU - 8-Bit 12MHz AVR MCU, 8KB Flash | Microchip
ATTINY88-AU

ATTINY88-AU - 8-Bit 12MHz AVR MCU, 8KB Flash | Microchip

The Microchip Technology ATTINY88-AU is an 8-bit AVR RISC microcontroller with a 12 MHz maximum clock, 8 KB in-system programmable flash, 512 bytes SRAM, 64 bytes EEPROM, 28 general-purpose I/O lines, and a 32-TQFP 7 x 7 mm package. It combines a compact AVR architecture with ADC, serial-interface, timer, and PWM resources for embedded control, sensing, and compact consumer or industrial products. An 8-bit AVR microcontroller is a programmable semiconductor containing a CPU core, flash program memory, data memory, peripheral modules, and I/O pins. The ATTINY88 belongs to the ATtiny family, uses the AVR enhanced RISC architecture, and is positioned as a low-power, cost-conscious embedded controller. Its 8-bit architecture is suited to control loops, sensor reading, actuator signaling, and simple serial communication rather than high-throughput computing. Key verified features include 8 KB flash configured as 4K x 16 words, 512 bytes SRAM, 64 bytes EEPROM, 28 I/O lines, 32 general-purpose working registers, two flexible timer/counters with compare modes, an 8-channel 10-bit ADC with gain stage, I2C, SPI, and operation from 1.8 V to 5.5 V. The 12 MHz device combines a 7 x 7 mm TQFP package with sufficient peripheral integration for compact embedded products. The AVR RISC architecture supports instruction-level efficiency, while the analog and serial peripherals reduce the need for external components. The ADC provides a practical path for analog sensor conditioning and control decisions, while I2C and SPI support communication with sensors, displays, memories, and other digital peripherals. The timers support timing, input capture, compare, and PWM-style functions. Typical applications include small sensor nodes, LED lighting controllers, compact consumer devices, battery-powered accessories, simple data-acquisition modules, and low-cost embedded control boards. The 1.8 V to 5.5 V operating range supports systems built around modern low-voltage digital rails. When designing around the ATTINY88-AU, confirm pin multiplexing, ADC input availability, programming signals, and power requirements against the manufacturer datasheet. Firmware and toolchain compatibility should also be validated before production release.

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ATTINY88-MU 12MHz 8KB 32-VQFN AVR MCU | Microchip
ATTINY88-MU

ATTINY88-MU 12MHz 8KB 32-VQFN AVR MCU | Microchip

Microchip Technology ATTINY88-MU is an 8-bit AVR RISC-based CMOS microcontroller with an operating frequency of 12MHz, 8KB of in-system-programmable flash memory and 28 general-purpose I/O lines in a 32-VQFN package measuring 5mm by 5mm. It operates from 1.8V to 5.5V and provides 512 bytes of SRAM, 64 bytes of EEPROM, two timer/counters, a 10-bit ADC, SPI and debugWire support. An AVR microcontroller is an 8-bit embedded-control semiconductor that combines a processor core, nonvolatile program memory, data memory and peripherals on one integrated circuit. Within the product hierarchy, ATTINY88-MU belongs to the ATtiny family of compact microcontrollers. Its 28 I/O pins provide substantial connectivity for sensors, switches, indicators, actuators and small serial interfaces while maintaining a low component count. Key verified features include up to 12MIPS throughput at 12MHz, eight 8-bit timer/counter registers, programmable watchdog operation and support for In-Circuit Serial Programming. The device combines a 10-bit ADC, SPI serial interface and debugWire debugging in a 5mm-square surface-mount package. These resources suit compact control systems requiring mixed digital and analog input without a larger microcontroller package. The ATtiny48/88 family uses Microchip picoPower AVR architecture to balance processing capability with low-power operation. Because ATTINY88-MU is an 8-bit device, firmware is best organized around interrupt-driven control, timers, digital state machines and periodic sensor sampling. The 512-byte SRAM should be budgeted carefully when buffering data or supporting multiple communication routines, while the 8KB flash capacity favors compact code and bootloading strategies. Typical applications include small industrial controllers, building automation endpoints, sensor hubs, LED-control systems, appliance interfaces and compact embedded instruments. A designer can use the 28 GPIO pins for local controls while assigning SPI to an external sensor or display and using the ADC for analog measurement. Programming is supported through the device's programming and debug interfaces documented by Microchip. A critical PCB consideration is exposed-pad and via layout in the 32-VQFN package. Confirm the exact land pattern, pad dimensions and pin mapping against the manufacturer package drawing before fabrication. Keep analog and digital return paths controlled, provide local supply decoupling, and use the reset and programming interface so programming and debugging remain accessible in production. This page consolidates verified distributor specifications, lifecycle information, application guidance and practical package considerations. It distinguishes verified ATTINY88-MU facts from parameters unavailable in the supplied search results, avoiding unsupported electrical or lifecycle assumptions while helping engineers assess fit before requesting a quote.

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ATTINY88-PU - 8-Bit 12MHz AVR MCU | Microchip Technology
ATTINY88-PU

ATTINY88-PU - 8-Bit 12MHz AVR MCU | Microchip Technology

The Microchip Technology ATTINY88-PU is an 8-bit AVR ATtiny microcontroller with 8KB of in-system programmable flash memory, a 12 MHz maximum clock, and a 28-PDIP package. It operates across the verified 1.8V to 5.5V supply range and is intended for compact embedded-control, sensing, and actuator designs. The ATTINY88-PU also provides 64 bytes of EEPROM and 512 bytes of SRAM according to the cited comparison data, giving firmware designers more working memory than the smallest ATtiny devices while retaining a small through-hole footprint. A microcontroller is a semiconductor that integrates a processor core, nonvolatile program memory, data memory, and peripherals into one device. The ATtiny88 belongs to the 8-bit AVR family, a low-complexity controller family suited to real-time control loops, digital I/O, timers, communication interfaces, and small sensor systems. The ATTINY88-PU uses an advanced RISC architecture and is supported by an ecosystem of AVR-compatible tools and libraries. The verified feature set includes 8KB of in-system programmable flash, 64 bytes of EEPROM, 512 bytes of SRAM, 123 powerful instructions, and a 12MHz operating speed. Its 1.8V to 5.5V range supports both low-voltage and conventional 5V designs. The 28-PDIP package is useful for prototypes, through-hole assembly, hand wiring, and designs where a socket or easy rework is useful. Typical embedded uses include environmental monitoring, small motor or relay control, LED status systems, keypad interfaces, and compact control boards. Because the exact pin names, timers, peripherals, electrical limits, and package drawing are not supplied in the verified data, those details should be confirmed in the manufacturer datasheet before schematic capture or firmware deployment. Design with the DIP footprint, clock source, programming interface, decoupling requirements, and I/O voltage limits verified against the official datasheet. The 12 MHz operating speed does not by itself guarantee a particular timer frequency; the actual peripheral clock behavior depends on the selected clock source, fuse configuration, and divider settings. This page combines verified manufacturer and distributor facts with purchasing context, application guidance, and conservative replacement qualification. It does not claim a drop-in alternative unless the same package and pin-level compatibility are explicitly supported by available cross-reference data.

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ATTINY9-MAH - 8-Bit 12MHz AVR with 1KB Flash | Microchip
ATTINY9-MAH

ATTINY9-MAH - 8-Bit 12MHz AVR with 1KB Flash | Microchip

The Microchip Technology ATTINY9-MAH is an 8-bit AVR RISC-based microcontroller operating up to 12 MHz, with 1 KB of ISP Flash memory, 32 bytes of SRAM, and four general-purpose I/O lines. It is packaged in an 8-UFDFN exposed-pad package for compact, surface-mount embedded designs. The verified distributor data identifies the part as an ATtiny-series AVR device using an internal oscillator and supplied in bulk packaging. A microcontroller is a programmable integrated circuit that executes firmware to monitor inputs, control outputs, and manage system timing. In the broader semiconductor hierarchy, this device is an 8-bit microcontroller, part of the AVR family, and belongs to the embedded-control and power-management design ecosystem. The ATTINY9 is positioned for small control tasks where low memory capacity, low pin count, and simple timing are more important than a large peripheral set or high processing bandwidth. Verified specifications include 1 KB of program Flash, 32 bytes of SRAM, four I/O lines, a 12 MHz maximum speed, an internal oscillator, and a 16-bit timer/counter with two PWM channels. The manufacturer page also identifies 16 general-purpose working registers and power-on reset, PWM, and watchdog-related functionality. These resources support compact control loops, simple indicator systems, basic motor or actuator timing, and low-power embedded products. The 8-UFDFN package helps reduce board area compared with larger leaded or plastic packages, but its exposed pad and fine-pitch footprint require careful PCB layout, land-pattern verification, soldering controls, and thermal-via planning. Because the provided data does not specify the complete electrical operating range, pin names, memory-retention behavior, or detailed timing characteristics, those parameters are marked as needing verification rather than inferred. Typical uses include small sensor interfaces, simple timers, compact LED or indicator controllers, low-cost consumer accessories, and basic embedded control modules. The device is most appropriate when firmware and I/O requirements are modest and the board can be designed around its 1 KB Flash and 32-byte SRAM limits. For designs needing more memory, communication peripherals, or a larger package pin count, a different ATtiny device should be evaluated. For a new design, confirm the exact UFDFN footprint, exposed-pad connection, programming method, oscillator behavior, and device-specific electrical limits against the official Microchip documentation before layout release. This page combines verified distributor specifications with engineering guidance, while clearly separating confirmed data from parameters that require manufacturer-datasheet confirmation.

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ATXMEGA128A1-AU - 8/16-bit AVR XMEGA MCU, 128KB Flash, TQFP-100
ATXMEGA128A1-AU

ATXMEGA128A1-AU - 8/16-bit AVR XMEGA MCU, 128KB Flash, TQFP-100

The Microchip Technology ATXMEGA128A1-AU is a low-power, high-performance 8/16-bit AVR XMEGA A1 microcontroller based on the AVR enhanced RISC architecture, delivering 32 MHz CPU throughput with single-cycle instruction execution and 128 KB of in-system self-programming Flash, 8 KB SRAM, 2 KB EEPROM, and 8 KB boot code section in a 100-pin TQFP (14x14 mm) package. What is an XMEGA microcontroller? The XMEGA family represents Atmel/Microchip's high-performance 8/16-bit AVR RISC architecture, sitting in the taxonomy: microcontroller -> embedded MCU -> 8/16-bit RISC MCU -> AVR XMEGA family -> A1 series. XMEGA devices execute most instructions in a single clock cycle, achieving throughput approaching 1 MIPS per MHz, and integrate rich peripherals such as DMA controllers, event systems, and multi-level interrupt controllers to reduce CPU load in real-time applications. Key features of the ATXMEGA128A1-AU include four-channel DMA controller, eight-channel event system, programmable multi-level interrupt controller, 78 general-purpose I/O lines, 16-bit real-time counter (RTC), eight flexible 16-bit timer/counters with compare and PWM channels, eight USARTs, four SPI/serial interfaces, two I2C/TWI interfaces, 12-bit ADC and DAC, and a full-speed USB device interface. The wide 1.6 V to 3.6 V operating voltage range supports both 1.8 V and 3.3 V system designs. The ATXMEGA128A1-AU uses a pipelined Harvard architecture with 32 working registers directly connected to the ALU, enabling high code density and deterministic interrupt latency. The peripheral event system allows peripherals to communicate without CPU intervention, while the four-channel DMA controller offloads data movement between memory and peripherals, ideal for high-throughput sensor aggregation or USB transfers. Typical applications include industrial control systems, building automation, smart energy metering, motor control, USB human-interface devices, sensor hubs, and low-power wireless sensor nodes. Its high peripheral integration and rich connectivity make it well-suited for designs consolidating multiple discrete functions onto a single MCU. When designing with this device, note that the A1 family is marked Not Recommended for New Designs by Microchip, with the AU series offered as the preferred successor. Designers should validate long-term availability before committing to new production. Decoupling with 100 nF ceramic capacitors near each supply pin is essential for clean ADC and DAC performance. This page synthesizes distributor pricing, lifecycle status, drop-in alternative recommendations, and practical design notes that complement the manufacturer datasheet, enabling engineers to make informed sourcing and design decisions.

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ATXMEGA128A1-CU - 128KB Flash 32MHz XMEGA A1 MCU 100-CBGA
ATXMEGA128A1-CU

ATXMEGA128A1-CU - 128KB Flash 32MHz XMEGA A1 MCU 100-CBGA

The Microchip (Atmel) ATXMEGA128A1-CU is a low-power, high-performance 8/16-bit AVR XMEGA A1 microcontroller featuring 128 KB of self-programming Flash program memory, 8 KB SRAM, 2 KB EEPROM, and a 100-ball CBGA (9x9 mm) package. Operating from 1.6 V to 3.6 V with a 32 MHz core clock, it executes instructions in a single cycle, approaching 1 MIPS per MHz, while the integrated DMA controller and 8-channel event system offload the CPU for deterministic peripheral handling. A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash), working memory (SRAM), non-volatile data storage (EEPROM), and programmable peripherals. Within the broader taxonomy, an MCU belongs to the category of embedded processors, sitting below microprocessors in system hierarchy and above discrete logic ICs in functional capability. The AVR XMEGA family specifically represents an 8/16-bit RISC architecture that targets low-power, deterministic, real-time embedded applications, balancing DSP-class peripheral integration with simple C-friendly tooling. Key features of the ATXMEGA128A1-CU include 78 general-purpose I/O lines, eight 16-bit timer/counters with PWM and capture, a 16-bit RTC, four-channel DMA, programmable multi-level interrupt controller, USB full-speed device support via on-chip transceiver, multiple USART/SPI/TWI interfaces, an external bus interface, a 12-bit ADC and 12-bit DAC, AES and DES crypto accelerators, and an on-chip debug (OCD) system with PDI/DebugWIRE support. The 100-CBGA (9x9 mm, 0.8 mm pitch) package provides generous I/O and an exposed thermal structure suitable for industrial temperature ranges. Architecturally, the device pairs an enhanced AVR RISC pipeline with Harvard-style busing and a peripheral event system that lets peripherals signal one another without CPU intervention - a hallmark of XMEGA's deterministic real-time design. The 1.6 V to 3.6 V wide operating range, multiple sleep modes, and on-chip voltage regulator make it well suited to battery-powered and industrial sensor nodes. Note that the ATXMEGA128A1 family is marked Not Recommended for New Designs (NRND) by Microchip in favor of the newer XMEGA AU series. Typical applications include industrial control (HVAC, factory automation, motor drive controllers, building systems), hand-held battery-powered instrumentation, power tools, smart metering, optical and medical devices, large home appliances, and USB peripherals. Its crypto engines also make it a fit for embedded security nodes. When designing with this part, allocate the 8 KB SRAM and 2 KB EEPROM budgets carefully and reserve at least 4 KB of the 128 KB Flash for a robust bootloader. The 100-CBGA package requires careful PCB pad design and reflow profiling; verify the 0.8 mm pitch footprint against Microchip's package drawing before fab release. This page synthesizes distributor availability, same-package drop-in alternatives from the XMEGA family, and practical design notes not found in the manufacturer datasheet.

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ATXMEGA128A1-CUR - 128KB Flash 32MHz AVR XMEGA MCU | Microchip
ATXMEGA128A1-CUR

ATXMEGA128A1-CUR - 128KB Flash 32MHz AVR XMEGA MCU | Microchip

The Microchip ATXMEGA128A1-CUR is a low-power, high-performance 8/16-bit AVR XMEGA microcontroller delivering 32 MIPS throughput at 32 MHz, packaged in a 100-ball 9x9 mm TFBGA (CBGA) for compact embedded designs. According to the Microchip (formerly Atmel) datasheet, the device integrates 128 KB of in-system self-programming Flash with read-while-write support, 8 KB boot code section, 8 KB SRAM, 2 KB EEPROM, a four-channel DMA controller, an eight-channel event system, and a programmable multilevel interrupt controller. Operating voltage spans 1.6 V to 3.6 V across an industrial temperature range of -40°C to +85°C, making it suitable for battery-powered and industrial-grade applications. An AVR XMEGA microcontroller is a member of the 8/16-bit RISC microcontroller family based on the enhanced AVR architecture. Within the broader taxonomy, XMEGA devices sit between classic 8-bit AVR MCUs and 32-bit ARM Cortex-M parts - they execute most instructions in a single clock cycle, achieving 1 MIPS per MHz, while exposing richer peripherals (DMA, event system, AES/DES crypto on some variants) than legacy ATmega devices. The XMEGA A1 family is the top-of-line 100-pin tier, with the highest pin count, largest memory options, and the most peripheral channels in the XMEGA lineup. Key features of the ATXMEGA128A1-CUR include four USARTs, four TWI (I²C-compatible) interfaces, two SPI ports, a 12-channel 16-bit event system, an 8-channel 16-bit timer/counter array with PWM and compare modes, a 12-bit 2 Msps ADC, two 12-bit DACs, an analog comparator with hysteresis, and 78 general-purpose I/O lines. The 100-ball TFBGA package provides a 0.8 mm ball pitch and 1.2 mm height, optimized for compact handheld and IoT designs. Compared to ATmega128, the XMEGA core delivers roughly 2-4x the MIPS at the same clock while adding DMA and event-driven peripherals. Typical applications include industrial sensor hubs, building automation controllers, USB human-interface devices, smart energy metering nodes, low-power wireless sensor platforms, and motor-control signal processors. Designers select this part when they need AVR toolchain compatibility (AVR Studio, Microchip Studio, GCC-AVR) combined with XMEGA's DMA and event system for deterministic, low-CPU-overhead peripheral handling. When designing with this device, place the 100-ball TFBGA land pattern on a minimum 4-layer PCB with continuous ground planes beneath the package to ensure stable JTAG/PDI programming and to manage thermal dissipation at high MIPS loads. Always include decoupling: a 100 nF ceramic capacitor per VCC pin pair plus a bulk 4.7 µF tantalum or ceramic near the supply rail. Microchip recommends Atmel-ICE or AVR Dragon for PDI programming. This page synthesizes distributor pricing, drop-in AVR XMEGA alternatives, package-level pinout, and practical design notes not found in the manufacturer datasheet alone.

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ATXMEGA128A4U-AUR - 8/16-bit AVR XMEGA MCU, 128KB Flash, 44-TQFP | Microchip
ATXMEGA128A4U-AUR

ATXMEGA128A4U-AUR - 8/16-bit AVR XMEGA MCU, 128KB Flash, 44-TQFP | Microchip

The Microchip ATXMEGA128A4U-AUR is an 8/16-bit AVR XMEGA A4U microcontroller featuring 128 KB of in-system self-programmable Flash, 8 KB SRAM, 2 KB EEPROM, and a 4 KB boot code section, all packaged in a 44-pin TQFP (10x10 mm) supplied on tape and reel. It operates at up to 32 MHz delivering up to 32 MIPS throughput, integrates a 4-channel DMA controller, an 8-channel event system, and a full-speed USB 2.0 device/host interface that distinguishes the A4U family from earlier A4 devices. The part number suffix "-AUR" indicates the industrial temperature grade and tape-and-reel packaging for high-volume assembly. An AVR XMEGA microcontroller is a high-performance 8/16-bit RISC MCU family from Microchip (originally Atmel) targeting low-power embedded designs that need more peripherals than classic ATmega parts but still rely on the AVR core rather than ARM Cortex-M. Within the broader taxonomy it sits as an MCU -> microcontroller -> embedded controller -> semiconductor. The "XMEGA" name signals an upgraded peripheral set including hardware crypto, DES, AES, and 12-bit ADC/DAC blocks, plus the unified event system for inter-peripheral signalling without CPU intervention. Key differentiating specifications include the 128 KB Flash (64K x 16 organization), 8 KB SRAM, 2 KB EEPROM, 12-bit ADC and DAC peripherals, full-speed USB 2.0 with device and host capability, and an operating voltage range of 1.6 V to 3.6 V. The device supports both 1.8 V and 2.5 V/3.3 V operation, allowing direct attachment to Li-ion, NiMH, or 3.3 V regulated rails without level shifters. An external bus interface provides address/data expansion for external memories or graphics controllers. Architecturally, the ATXMEGA128A4U-AUR uses the Atmel AVR enhanced RISC core with 32 working registers directly connected to the ALU, achieving single-cycle execution. The integrated DMA controller can move data between peripherals and memory without CPU involvement, freeing the core for application code. The 8-channel event system routes peripheral events (timer overflows, ADC conversions, I/O edges) to other peripherals, enabling deterministic hardware-software co-design. The USB 2.0 full-speed transceiver is on-die, requiring only an external pull-up resistor and bypass capacitors. Typical applications include USB HID devices, USB mass storage controllers, industrial sensor hubs with USB diagnostics, low-power data loggers, motor control front ends, and battery-powered handheld instruments. The combination of low active current, deep sleep modes down to sub-microamp, and integrated USB makes it particularly attractive for USB-powered sensor peripherals. Designers also use the A4U family in consumer audio accessories where 12-bit DAC and PWM drive suit headphone or intercom front ends. When designing with this part, budget for the 44-pin TQFP footprint and ensure the USB D+/D- traces are 90 ohm differential-matched. Boot loader and PDI programming share the same pins, so reserve access for in-system programming via the Atmel-ICE or AVR Dragon. The integrated 32 kHz internal RC oscillator can replace an external crystal in space-constrained designs but trades accuracy for BOM savings. This page synthesizes distributor pricing, USB-enabled drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATXMEGA128B3-MCU - 32MHz AVR MCU, 128KB Flash, USB | Microchip
ATXMEGA128B3-MCU

ATXMEGA128B3-MCU - 32MHz AVR MCU, 128KB Flash, USB | Microchip

The Microchip Technology ATXMEGA128B3-MCU is a low-power, high-performance 8/16-bit AVR XMEGA B3 microcontroller with 128KB self-programming Flash, 4KB SRAM, 2KB EEPROM, a 2-channel DMA controller, 4-channel event system, Full-Speed USB Device, 4x25-segment LCD controller, and up to 32 MIPS throughput at 32 MHz, housed in a 64-pin VQFN (7x7 mm) package with exposed pad. A microcontroller unit (MCU) is a single-chip computer integrating a processor core, program and data memory, and peripherals into one package. Within the hierarchy of embedded processors, the AVR XMEGA family sits between small 8-bit AVRs and 32-bit ARM cores, offering 8/16-bit RISC execution with the peripheral richness needed for human-interface and connectivity applications. Key features include 128KB (128K x 8) of self-programming Flash with a 4KB boot code section, enabling field firmware updates over USB or other interfaces; a 4-channel event system that routes peripheral signals without CPU intervention; and a 2-channel DMA controller that offloads data movement for lower CPU load and power consumption. Technically, the AVR RISC core executes most instructions in a single clock cycle, delivering up to 32 MIPS at 32 MHz. The integrated USB Full-Speed Device controller eliminates an external USB interface chip, while the 4x25 segment LCD driver with selectable drive schemes suits battery-powered metering and display products. Typical applications include USB-connected instruments, industrial control panels with LCD displays, battery-powered metering devices, and consumer appliances requiring both USB and segment LCD interfaces. When designing with this device, budget the VQFN-64 exposed-pad footprint for thermal and ground via connections, and verify Flash endurance and supply-voltage ranges against the manufacturer datasheet before finalizing power sequencing. This page synthesizes distributor pricing from LCSC and Heisener, drop-in same-family alternatives, and practical design guidance not found in the manufacturer datasheet alone.

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ATXMEGA128D4-AU - 128KB Flash XMEGA AVR MCU 32MHz 44TQFP | Microchip
ATXMEGA128D4-AU

ATXMEGA128D4-AU - 128KB Flash XMEGA AVR MCU 32MHz 44TQFP | Microchip

The Microchip (Atmel) ATXMEGA128D4-AU is a high-performance, low-power 8/16-bit AVR XMEGA microcontroller integrating 128 KB of in-system programmable Flash with read-while-write support, 2 KB EEPROM, and 8 KB SRAM, housed in a 44-pin TQFP package. It executes instructions at up to 32 MHz from a 1.6-3.6 V supply, with 34 general-purpose I/O lines, two USARTs, two TWI (I2C) interfaces, four flexible 16-bit timer/counters with compare and PWM channels, a 16-bit real-time counter, a four-channel event system, and a programmable multi-level interrupt controller. An 8 KB boot-code section is dedicated for bootloader use, and the device supports AES and DES crypto accelerators plus a 12-bit, 2 MSPS ADC. An 8/16-bit AVR XMEGA microcontroller is an advanced member of Microchip's AVR family combining 8-bit code density with 16-bit peripheral datapaths. It belongs to the broader class of microcontrollers (MCUs) within embedded processors and semiconductors, designed for deterministic real-time control with very low active and sleep-mode power. The XMEGA D4 sub-family specifically targets low-power mixed-signal applications requiring moderate pin counts and rich peripheral integration, sitting above tinyAVR and megaAVR in the Atmel/Microchip MCU hierarchy. Key features include the four-channel event system for inter-peripheral signalling without CPU intervention, a programmable multi-level interrupt controller for deterministic response, a 12-bit 2 MSPS ADC with optional gain stage, and a hardware AES/DES cryptographic engine. The 8 KB boot section allows secure bootloader updates, while the read-while-write Flash enables live firmware upgrades without halting execution. Power-saving features include five sleep modes, a 1.5 µA real-time-counter backup mode, and a peripheral event system that can wake the CPU autonomously. Typical applications include industrial control panels, sensor hubs, low-power wireless sensor nodes, motor control, smart metering, USB device peripherals, consumer white goods, and human-machine interface (HMI) touch panels. The wide 1.6-3.6 V operating range and integrated peripherals make it well suited to battery-powered and energy-harvesting designs. Designers should provide a 0.1 µF decoupling capacitor adjacent to each VCC pin, route analog and digital grounds separately, and observe the 32 MHz maximum system clock. For firmware development, Microchip's Atmel Studio 7 and MPLAB X IDE with the AVR/GNU toolchain target this device directly.

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ATXMEGA128D4-MH - 32MHz AVR XMEGA D4 MCU 128KB Flash | Microchip
ATXMEGA128D4-MH

ATXMEGA128D4-MH - 32MHz AVR XMEGA D4 MCU 128KB Flash | Microchip

The Microchip (formerly Atmel) ATXMEGA128D4-MH is a high-performance, low-power 8/16-bit AVR XMEGA D4 microcontroller combining 128 KB ISP Flash memory with read-while-write capability, 2 KB EEPROM, and 8 KB SRAM, operating at up to 32 MHz and housed in a 44-pin VQFN (7x7 mm) package with exposed thermal pad. The device supports an operating voltage of 1.6 V to 3.6 V and provides 34 programmable I/O pins, a four-channel event system, programmable multi-level interrupt controller, and a DMA controller for CPU-off data movement. According to the manufacturer datasheet, the XMEGA D4 series is positioned for low-power applications requiring rich peripheral integration without sacrificing throughput. An AVR XMEGA microcontroller is a member of the 8/16-bit RISC microcontroller family based on the enhanced AVR architecture, sitting in the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC. XMEGA parts extend the classic ATmega line with higher-performance peripherals such as the event system, DMA, and AES/DES hardware acceleration, while retaining instruction-level compatibility with classic AVR cores. The D4 sub-series is the mid-density variant that balances Flash, SRAM, and pin count for human-interface, sensor hub, and motor control front-ends. Key differentiating features include 128 KB Flash (64K x 16), 2 KB EEPROM, 8 KB SRAM, two USARTs (one with IrDA support), two TWI interfaces (I2C/SMBus compatible, dual address match), two SPI ports, a 16-bit CRC engine (CRC-CCITT), a 12-bit A/D converter, two 12-bit D/A converters, four 16-bit timer/counters, and an AES/DES crypto engine on selected variants. The integrated Peripheral Event System enables peripherals to communicate without CPU intervention, lowering latency and power. Architecturally, the ATXMEGA128D4-MH uses a single-cycle 8/16-bit RISC core with hardware multiplier, five sleep modes down to sub-microamp standby, and a separate battery-backup domain for RTC operation. The 32 MHz peak throughput (with 2.7-3.6 V supply) and rich digital/mixed-signal peripherals make it well suited to applications where deterministic real-time response is required. Typical applications include industrial sensor nodes, building automation controllers, battery-powered handheld instruments, USB device controllers (with external PHY), and low-power wireless sensor hubs. Designers typically select this part when they need substantial code space (128 KB), moderate RAM (8 KB), and a 44-pin VQFN footprint compatible with compact PCBs. When designing with the ATXMEGA128D4-MH, note that the 1.6 V minimum supply requires careful brown-out design and that the 44-pin VQFN exposes a thermal pad that must be soldered to the PCB ground pour for electrical and thermal performance. Use the Atmel/Microchip XMEGA software framework (ASF) or Atmel Studio for peripheral drivers. This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet alone, giving engineers a one-stop reference for sourcing and validating the ATXMEGA128D4-MH.

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ATXMEGA16A4U-AU - 32MHz 16KB Flash AVR XMEGA MCU | Microchip
ATXMEGA16A4U-AU

ATXMEGA16A4U-AU - 32MHz 16KB Flash AVR XMEGA MCU | Microchip

The Microchip ATXMEGA16A4U-AU is a low-power, high-performance 8/16-bit AVR XMEGA A4U microcontroller running up to 32 MHz (32 MIPS) with 16 KB of in-system self-programming Flash, 2 KB SRAM, 1 KB EEPROM and a 4 KB boot code section, housed in a 44-pin TQFP (10x10 mm) package. An MCU (microcontroller) is a single-chip computer integrating a CPU core, program memory, data memory, and peripherals such as ADC, timers, and communication interfaces. The AVR XMEGA A4U family specifically occupies the 8/16-bit low-power tier of the AVR RISC architecture hierarchy, sitting below 32-bit ARM Cortex-M parts but above legacy 8-bit ATmega families in performance and peripheral richness. It targets battery-powered and mixed-signal embedded designs where deterministic behavior, fast interrupts, and rich analog integration matter more than raw MHz. Key features of the ATXMEGA16A4U-AU include 16 KB Flash with Read-While-Write support, a 4-channel DMA controller that off-loads the CPU from peripheral data movement, an 8-channel Event System for inter-peripheral signaling without CPU intervention, 34 general-purpose I/O lines, a 16-bit Real Time Counter (RTC), five 16-bit Timer/Counters, five USARTs, two TWI (I2C-compatible) ports, one SPI, a USB 2.0 Full-Speed device interface, and a 12-bit ADC with up to 12 channels plus dual 12-bit DAC channels. The peripheral set is unusually broad for a 16 KB Flash part. Architecturally, the device uses the Atmel AVR enhanced RISC core with a two-stage pipeline, hardware multiplier, and a programmable multi-level interrupt controller. The 1.6 V to 3.6 V supply range and low-power sleep modes with RTC retention make it attractive for energy-harvesting and always-on applications. Typical applications include USB HID peripherals, industrial sensor nodes, low-power wireless sensor hubs, building automation controllers, smart metering, LED lighting controllers with smooth dimming, and battery-backed IoT edge nodes. The integrated USB FS device is the distinguishing capability versus the non-U XMEGA A4 variants. When designing with this MCU, allocate the 4 KB boot section for bootloader code so application firmware can use the full 16 KB, and provide a 32.768 kHz crystal on the RTC pins if RTC accuracy matters. The PDI programming interface requires only two pins, freeing most of the GPIO for application use. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the manufacturer datasheet narrative.

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ATXMEGA16A4U-AUR - 16KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip
ATXMEGA16A4U-AUR

ATXMEGA16A4U-AUR - 16KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip

The Microchip Technology ATXMEGA16A4U-AUR is an 8/16-bit AVR XMEGA A4U microcontroller running up to 32MHz with 16KB of in-system self-programmable Flash, 2KB SRAM and 1KB EEPROM, housed in a 44-pin TQFP (10x10 mm) industrial-temperature package delivered on Tape & Reel. It features a 4-channel DMA controller, an 8-channel event system, a full-speed USB 2.0 device/host interface, and up to 32 MIPS throughput from the rich AVR RISC instruction set with 32 general-purpose working registers directly connected to the ALU. An XMEGA A4U microcontroller is a high-performance, low-power 8/16-bit AVR RISC core member of the Atmel/Microchip AVR XMEGA family, which itself sits within the broader hierarchy of microcontrollers (MCU) -> embedded processors -> integrated circuits -> semiconductors. XMEGA parts combine a 2-cycle hardware multiplier, a peripheral event system, and a multi-channel DMA to deliver deterministic, low-overhead I/O that is well suited to battery-powered and signal-conditioning designs. The 'U' suffix specifically denotes a USB 2.0 full-speed (12 Mbps) transceiver, while the 'A4U' series provides 4-channel DMA, 8-channel event system, and an external bus interface for SRAM, SDRAM and NAND expansions. Key differentiators of the ATXMEGA16A4U-AUR include 16KB Flash (vs 8/4KB on smaller XMEGA A-series siblings), on-chip USB 2.0 full-speed transceiver supporting device, host, and OTG roles, AES and DES crypto accelerators for secure firmware updates, an integrated 12-bit 1 MSPS ADC, a 12-bit 1 MSPS DAC, four USARTs, two TWI (I2C) ports, and two SPI ports. The peripheral event system allows direct hardware triggering between timers, ADC, DAC, DMA, and I/O without CPU intervention, while the 4-channel DMA controller offloads repetitive data moves to maintain real-time responsiveness. Typical applications include USB HID/mass-storage peripherals, industrial sensor front-ends with USB logging, secure IoT edge nodes with AES encryption, portable data loggers, and battery-powered human-interface devices (HID) such as custom keyboards, mice, or capacitive-touch control panels. The wide 1.6V to 3.6V supply range and picoPower sleep modes support designs that spend long periods in standby and wake on USB events. Design considerations include careful decoupling of the analog and digital VCC rails, provision for a 12 MHz crystal or external clock for USB full-speed operation, and reserving PA0/PA1 for the USB D-/D+ pins since the on-chip transceiver is bonded to those pads. The 4KB bootloader section with independent lock bits enables in-field firmware upgrades.

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ATXMEGA16D4-MH - 32MHz AVR XMEGA D4 MCU 16KB Flash | Microchip
ATXMEGA16D4-MH

ATXMEGA16D4-MH - 32MHz AVR XMEGA D4 MCU 16KB Flash | Microchip

The Microchip ATXMEGA16D4-MH is a high-performance, low-power 8/16-bit AVR XMEGA D4 microcontroller combining 16KB of in-system programmable Flash with read-while-write capability, 1KB EEPROM, and 2KB SRAM, all integrated into a 44-pin VQFN (7x7 mm) footprint. It runs at up to 32 MHz core clock and operates from a 1.6V to 3.6V supply, making it suitable for battery-powered and industrial 3.3V systems. The device exposes 34 programmable I/O lines plus a four-channel event system and a programmable multi-level interrupt controller for deterministic real-time response. An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and a rich set of peripherals (timers, ADC/DAC, communication controllers, GPIO). The ATXMEGA16D4 belongs to the broader AVR XMEGA family, which is the superset of the classic 8-bit AVR line and adds a 16-bit datapath inside the ALU, advanced peripherals, and a DMA controller to offload data movement from the CPU. Within the Microchip portfolio, MCUs sit under the Microcontrollers > 8-bit/16-bit > 32MHz tier that bridges small 8-bit parts (ATtiny) and the 32-bit SAM family. Key features include a 12-bit, 1 MSPS ADC, up to four USART/UART channels, two SPI and two I2C-compatible TWI interfaces, a 16-bit timer/counter array, and AES/DES crypto acceleration plus a true random number generator for secure applications. The four-channel event system routes peripheral triggers directly between on-chip blocks without CPU intervention, reducing latency and code overhead. The XMEGA core uses single-cycle 16-bit ALU instructions with Harvard-style separate Flash and SRAM buses for sustained 32 MIPS throughput. Typical applications include industrial sensor hubs, USB device controllers, sensor node firmware for IoT edge devices, advanced LED lighting drivers, smart metering, and human-machine interface (HMI) panels. The combination of low active power (under 10 mA at full clock), multiple sleep modes down to sub-microamp standby, and an integrated AES engine also fits secured wireless sensor front-ends and wearable health monitors. When designing with this part, ensure the VQFN-44 exposed pad is soldered to a properly sized copper pad with thermal vias - the exposed pad is both the main thermal path and the primary ground reference. Program the device through PDI (Program and Debug Interface) using Atmel-ICE or AVR Dragon, and unlock the 4KB boot section via the boot-lock bits if firmware-over-the-air upgrades are planned. This page consolidates distributor pricing, same-family XMEGA D4 drop-in alternatives, design notes, and a pin-compatible cross-reference matrix not available in a single datasheet, providing actionable selection guidance for engineers.

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ATXMEGA256A3BU-AU - 256KB Flash 32MHz AVR XMEGA A3BU MCU | Microchip
ATXMEGA256A3BU-AU

ATXMEGA256A3BU-AU - 256KB Flash 32MHz AVR XMEGA A3BU MCU | Microchip

The Microchip Technology ATXMEGA256A3BU-AU is a low-power, high-performance 8/16-bit AVR XMEGA A3BU microcontroller delivering 32 MHz CPU throughput with 256 KB in-system self-programmable Flash, 16 KB SRAM, and 4 KB EEPROM, housed in a 64-pin TQFP (14x14 mm) package. It targets embedded designs that require deterministic real-time performance, rich analog integration, and battery-backed operation. What is an XMEGA microcontroller? An XMEGA (pronounced "mega") is a family of 8/16-bit microcontrollers based on Atmel's enhanced AVR RISC architecture. It executes most instructions in a single clock cycle, achieving throughput approaching 1 MIPS per MHz. In the taxonomy, XMEGA sits between the ATmega 8-bit family and 32-bit ARM Cortex-M devices - delivering higher peripheral integration than ATmega while remaining easier to program than 32-bit MCUs, with deterministic interrupt latency suited for real-time control. Key features include dual 12-bit ADCs (2 Msps with optional PGA), up to 7 USART/UART interfaces, 4-channel DMA controller, 8-channel event system for inter-peripheral signalling, hardware crypto engine (AES/DES), and a unique 32-bit Real-Time Counter with separate 32.768 kHz oscillator. The 64-pin TQFP exposes full USB 2.0 full-speed device support plus 4-wire touch interface and a battery-backup domain with separate VBAT pin. The "B" variant in A3BU adds this battery-backed RTC, which the plain A3U lacks. The A3BU is built on a high-performance CMOS process with a multi-channel event system that lets peripherals trigger each other without CPU intervention, offloading DMA-driven data movement. An integrated cryptographic accelerator performs AES-128 and DES/3DES in hardware, while the peripheral event system supports capacitive touch measurement via the on-chip PTC (Peripheral Touch Controller). The 32-bit RTC plus separate low-power oscillator makes the part especially attractive for metering, security, and battery-backed data logging. Typical applications include industrial automation controllers, smart energy metering with battery backup, USB-connected HID/data acquisition peripherals, capacitive touch HMI panels, building automation gateways, and portable medical instrumentation. The combination of dual 12-bit ADC, hardware crypto, and battery-backed RTC also fits secure IoT edge nodes. Design consideration: ensure the 32.768 kHz crystal and load capacitors meet the datasheet's ESR and load-capacitance specifications for reliable RTC operation, especially across temperature. Also, reserve the VBAT pin for a coin-cell or super-capacitor backup if non-volatile RTC retention is required. This page synthesizes distributor pricing, drop-in alternatives, and engineering design notes not aggregated on the manufacturer datasheet, giving procurement and embedded engineers a single source for cross-reference and design validation.

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ATXMEGA256A3BU-MH - 256KB Flash 32MHz AVR XMEGA MCU | Microchip
ATXMEGA256A3BU-MH

ATXMEGA256A3BU-MH - 256KB Flash 32MHz AVR XMEGA MCU | Microchip

The Microchip Technology ATXMEGA256A3BU-MH is a low-power, high-performance 8/16-bit AVR XMEGA A3BU microcontroller featuring 256 KB self-programming Flash, 16 KB SRAM, and 4 KB EEPROM, operating up to 32 MHz from a 2.7V to 3.6V supply, housed in a 64-pin QFN (9x9 mm) package. It integrates a 4-channel DMA controller, 8-channel event system, dual 12-bit ADC, and a 32-bit Real-Time Counter with Battery Backup System (VBAT) for RTC retention. An AVR XMEGA microcontroller is a member of Microchip's 8/16-bit RISC MCU family that extends the classic AVR core with a wider 16-bit instruction path, hardware DMA, an event system for peripheral-to-peripheral signaling without CPU intervention, and rich analog peripherals. XMEGA parts sit between the 8-bit ATmega family and 32-bit ARM Cortex-M parts, making them well suited to mixed-signal embedded designs that need deterministic I/O timing and low active power. Key features of the ATXMEGA256A3BU include 256 KB Flash with an 8 KB boot code section, 16 KB SRAM, 4 KB EEPROM, 34 programmable I/O lines, dual 12-bit ADC, two 12-bit DAC channels, multiple USART/SPI/TWI interfaces, AES/DES crypto engine, and an RTC subsystem with VBAT pin (PF5) that keeps the 32-bit RTC running during main-battery loss. The 32 MHz peak core speed with a single-cycle 16-bit ALU delivers roughly 32 MIPS throughput while consuming only a few mA in active mode. The A3BU silicon uses Microchip's picoPower technology with multiple sleep modes down to sub-microamp standby, plus an event system that lets peripherals trigger each other so the CPU can stay asleep longer. The Battery Backup System preserves RTC state across main-power failures by switching the RTC supply onto VBAT, which is a key feature absent from the otherwise similar ATxmega256A3U. Typical applications include industrial sensor hubs, smart metering, building automation, low-power wireless sensor nodes paired with an external radio, motor control, USB device/embedded hosts, and battery-backed data loggers. The 32-bit RTC plus VBAT makes it a strong fit for any design that must keep wall-clock time through power cycles. When designing with this MCU, route VBAT through a backup supercap or coin cell, decouple the main VCC with 100 nF plus 4.7 µF bulk caps adjacent to each supply pin, and reserve a dedicated 6-pin PDI header for in-system programming because the QFN package cannot be socketed on most production boards. This page synthesizes distributor stock and pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.

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ATXMEGA256A3U-AN - 32MHz 256KB Flash 8/16-bit AVR MCU | Microchip
ATXMEGA256A3U-AN

ATXMEGA256A3U-AN - 32MHz 256KB Flash 8/16-bit AVR MCU | Microchip

The Microchip Technology ATXMEGA256A3U-AN is a low-power, high-performance 8/16-bit AVR XMEGA A3U microcontroller running at up to 32 MHz with 256 KB self-programming Flash program memory, 16 KB SRAM and 4 KB EEPROM, housed in a 64-pin TQFP (14x14 mm) package rated for 105 °C operation. The device delivers up to 32 MIPS throughput and integrates a 4-channel DMA controller, an 8-channel event system, a cryptographic AES/DES engine on the A3U family, and full-speed USB 2.0 device support, making it a peripheral-rich member of the Atmel AVR enhanced RISC architecture. Background Knowledge: An 8/16-bit AVR XMEGA microcontroller is a member of the RISC microcontroller family, sitting in the hierarchy 8-bit MCU -> AVR core -> XMEGA family -> A3U series -> 64-pin TQFP class. It executes most instructions in a single clock cycle, providing close to 1 MIPS per MHz, and combines deterministic interrupt response with rich analog and digital peripherals for embedded control. Key features include 256 KB Flash with 8 KB boot section, 4 KB EEPROM endurance up to 100,000 cycles, 16 KB SRAM, an internal 32 MHz calibrated oscillator, multiple USART/SPI/TWI interfaces, and a 12-bit ADC with up to 2 MSPS sampling. The A3U suffix designates the USB-equipped sub-family with hardware AES and DES crypto engines. The 1.6 V to 3.6 V supply range supports battery and industrial 3.3 V rails, while sleep current under 1 µA with RTC running enables energy-harvesting and portable designs. Typical applications include USB peripherals, building and industrial automation, motor control, sensor hubs, and human-machine interface (HMI) panels. The integrated full-speed USB 2.0 device interface is widely used for HID, CDC, and vendor-class peripherals without an external transceiver. Hardware AES/DES acceleration offloads secure communication tasks from the CPU, while the 12-bit ADC and high-resolution timers simplify BLDC and stepper motor control loops. Designers should size decoupling per 64-pin TQFP power pins and follow the Atmel AVR1003 application note for USB hardware design. Use the Atmel AVR Studio / Microchip Studio toolchain with the AVR Dragon or JTAGICE3 for in-system debug. The XMEGA A3U datasheet and AVR1020 migration note are the authoritative references for peripheral mapping and migration from earlier A3 (non-U) parts.

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ATXMEGA256A3U-AU - 256KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip
ATXMEGA256A3U-AU

ATXMEGA256A3U-AU - 256KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip

The Microchip Technology ATXMEGA256A3U-AU is a low-power, high-performance 8/16-bit AVR XMEGA A3U microcontroller delivering up to 32 MIPS throughput at 32 MHz, integrating 256 KB of self-programming Flash program memory plus an 8 KB boot code section in a 64-pin TQFP (14x14 mm) package. It is part of the AVR enhanced RISC architecture family with single-cycle instruction execution. An 8/16-bit microcontroller (MCU) is a programmable system-on-a-chip that combines a CPU, Flash program memory, SRAM, EEPROM, and a rich set of peripherals on a single die. MCUs are the highest-volume category of integrated circuits and serve as the digital core of nearly every embedded product - from battery-powered IoT nodes to industrial motor drives - occupying the middle of the silicon hierarchy between simple discrete logic and full microprocessors. Key features include 16 KB SRAM, 4 KB EEPROM, a 4-channel DMA controller, an 8-channel event system, and 34 programmable I/O lines. The device operates from a 2.7V to 3.6V supply, supports LVTTL/LVCMOS-compatible I/O, and includes multiple communication interfaces (USART, SPI, TWI) plus a 12-channel 12-bit ADC and analog comparators. The A3U variant adds a USB 2.0 Full-Speed device interface absent from the non-U A3 series. The ATXMEGA256A3U uses a Harvard-architecture AVR CPU with a 3-stage pipeline and hardware multiplier, achieving 1 MIPS per MHz. The peripheral event system lets peripherals trigger one another without CPU intervention, freeing the core for application code. The 4-channel DMA controller can move data between peripherals and memory autonomously, further reducing CPU load for streaming or signal-processing tasks. Typical applications include building automation, industrial control, low-power IoT sensor nodes, motor control, metering, USB peripherals, and human-machine interfaces (HMI) with LCD segments. The wide peripheral set and large Flash make it well suited to data logging, LCD-keypad control panels, and protocol bridges that previously required external logic. When designing with this MCU, allocate adequate decoupling (typically 100 nF plus 10 uF bulk) close to each VCC pin, and follow the XMEGA AU manual guidance for PDI programming interface routing. The 64-pin TQFP footprint is shared with the rest of the ATxmega A3U family, allowing easy migration to the 192A3U, 128A3U, or 64A3U derivatives by code recompilation.

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ATXMEGA256C3-MH - 256KB Flash 32MHz XMEGA C3 MCU | Microchip
ATXMEGA256C3-MH

ATXMEGA256C3-MH - 256KB Flash 32MHz XMEGA C3 MCU | Microchip

The Microchip Technology ATXMEGA256C3-MH is a high-performance, low-power 8/16-bit AVR XMEGA C3 microcontroller featuring 256 KB in-system programmable Flash (with 8 KB boot code section and read-while-write capability), 4 KB EEPROM, 16 KB SRAM, and a 32 MHz CPU core, housed in a 64-pin QFN (9x9 mm) package. What is an AVR XMEGA microcontroller? The XMEGA family is a modernized successor to the classic 8-bit AVR architecture, combining a 16-bit instruction set with an 8-bit datapath (often described as 8/16-bit). Within the broader taxonomy it sits as: microcontroller -> embedded MCU -> 8/16-bit MCU -> AVR -> AVR XMEGA -> XMEGA C3 series. The C3 sub-series adds high-speed analog and a four-channel event system, positioning it above entry-level ATmega parts in both peripheral count and computational throughput. Key differentiating specifications include 50 general-purpose I/O lines, five 16-bit timer/counters with capture/compare/PWM, a 16-bit real-time counter, a four-channel event system, a programmable multi-level interrupt controller, USB Device and AES/DES crypto engine. The 32 MHz core delivers 32 MIPS with single-cycle execution, while peripheral DMA on 4 channels reduces CPU load for data movement. The architecture integrates an on-chip programmable gain amplifier (PGA), a 12-bit 2 MSPS ADC, a 12-bit 1 MSPS DAC, and multiple communication interfaces including USART, SPI, TWI (I2C), and full-speed USB. The 1.6 V to 3.6 V wide operating voltage and five software-selectable sleep modes with sub-microamp standby current make it well suited to battery-aware designs that need to wake on event. Typical applications include industrial control panels, building automation (HVAC, lighting, metering), USB peripherals (HID, CDC, custom class), motor control boards, handheld battery-powered instruments, factory automation nodes, and medical/clinical devices. The combination of large Flash, integrated crypto, and DMA makes it a strong fit for networked sensor hubs and secure IoT edge nodes. Designers should note that pin count and footprint drive PCB layout decisions. The 64-QFN variant is the highest-density option in the C3 family. Power estimation should include peripheral current draw and clock tree contributions, especially when high-speed peripherals are enabled. This page synthesizes distributor pricing, drop-in alternatives in the same 64-QFN footprint, and practical design notes not assembled on the manufacturer datasheet or distributor catalog pages.

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