微控制器

ATMEGA649-16MUR

ATMEGA649-16MUR - 8-bit AVR MCU 64KB 16MHz LCD | Microchip

The Microchip Technology ATMEGA649-16MUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 4KB SRAM, 2KB EEPROM, and an integrated segment LCD driver, clocked at up to 16MHz from a 5V supply in a 64-pin QFN (9x9 mm) exposed-pad package. An 8-bit AVR microcontroller is a single-chip processor built on the AVR enhanced RISC architecture, in which most of the 130 powerful instructions execute in a single clock cycle. Within the system hierarchy, the MCU sits at the heart of embedded control: microcontroller -> embedded processor -> semiconductor IC. The ATmega649 belongs to the LCD AVR family (ATmega325/329/645/649 and the 3290/6490 variants), which pairs general-purpose MCU peripherals with an on-chip LCD controller that can drive a segmented glass display directly. Key features include 64KB of self-programming Flash with read-while-write capability, 54 general-purpose I/O lines, a JTAG interface for boundary-scan, on-chip debugging, and programming, and an LCD controller with up to 4x25 or 8x24 segment drive. The advanced RISC core with 32 general-purpose working registers is directly connected to the ALU, allowing two independent registers to be accessed in one instruction. Technically, the device executes up to 16 MIPS at 16MHz, supports in-system self-programming via the boot loader section, and offers power-saving modes including idle, ADC noise reduction, and power-down, making it suited to battery-operated metering products. Peripherals include 8-channel 10-bit ADC, two 8-bit and two 16-bit timers with PWM, USART, SPI, and two-wire interface (per the ATmega649 family datasheet). Typical applications are utility metering with LCD display, handheld instruments, industrial control panels, and consumer appliances where a segmented display and low power are required. When designing with this part, budget the Flash around the bootloader size and validate the LCD bias resistor network against the target glass. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA6490-16AI

ATMEGA6490-16AI - 64KB Flash 16MHz AVR LCD MCU | Microchip

The Microchip ATMEGA6490-16AI is a high-performance, low-power 8-bit AVR RISC microcontroller with 64 KB ISP Flash memory, 4 KB SRAM, 2 KB EEPROM, and an integrated segment LCD driver, operating at up to 16 MHz in a 100-pin TQFP (14x14 mm) package for industrial temperature ranges (-40C to +85C). 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 of embedded systems, it serves as the central processing element, sitting above simple logic ICs but below 32-bit application processors. The AVR ATmega family from Microchip (formerly Atmel) is widely used for cost-sensitive embedded control where integrated peripherals reduce system part count. Key features include 64 KB of self-programming Flash with read-while-write capability, 135 powerful instructions with most executing in a single cycle, 32 general purpose working registers, and an on-chip LCD controller supporting up to 4x40 segments. The picoPower technology enables low sleep-mode currents for battery-operated designs. The advanced RISC architecture combines a rich instruction set with fast single-cycle ALU operation, delivering up to 16 MIPS throughput at 16 MHz. Integrated peripherals include an 8-channel 10-bit ADC, multiple timers/pWM channels, USART serial interfaces, SPI, TWI (I2C), and JTAG for on-chip debugging, allowing a single chip to replace MCU plus dedicated LCD driver plus external ADC solutions. Typical applications include utility metering with LCD displays, industrial control panels, battery-powered instrumentation, and white-goods human-machine interfaces where the integrated segment LCD driver and 69 general purpose I/O lines simplify board design. When designing with this device, the -AI suffix denotes the industrial temperature range of -40C to +85C; verify JTAG fuse settings before debugging, since JTAG can be disabled by default. Place 100 nF decoupling capacitors at each VCC/GND pair. This page synthesizes verified distributor data, same-family drop-in alternatives, and practical design notes not found in a single manufacturer source.

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ATMEGA6490-16AU

ATMEGA6490-16AU - 8-Bit AVR MCU 16MHz 64KB LCD | Microchip

The Microchip (Atmel) ATMEGA6490-16AU is a high-performance picoPower 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 4KB SRAM, 2KB EEPROM, an integrated 4x40-segment LCD driver, and 16MHz maximum clock speed, housed in a 100-pin TQFP (14x14 mm) package. A microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals onto one die, sitting at the device level of the embedded-systems hierarchy (embedded system -> MCU -> 8-bit AVR family -> ATmega series). The AVR architecture uses a Harvard-structured RISC core with most instructions executing in a single clock cycle, distinguishing it from von Neumann CISC MCUs of the same era. Key features include 64KB of self-programmable ISP Flash with read-while-write support, 54/69 general-purpose I/O lines, 32 general-purpose working registers, an 8-channel 10-bit ADC, and the integrated LCD controller that eliminates an external LCD driver in instrument designs. The picoPower technology provides multiple sleep modes for very low average power in battery-operated products. A JTAG interface supports boundary-scan testing and on-chip debugging. Technical depth: the ATmega6490 belongs to the ATmega3290/6490 LCD MCU family; the 130-instruction RISC core reaches up to 16 MIPS at 16MHz, while supply operation spans 2.7V to 5.5V for the 16MHz speed grade, covering both 3.3V and 5V logic systems. Typical applications include utility meters and energy meters with segment LCD displays, handheld industrial instruments, HVAC control panels, and consumer appliances that combine modest processing with dot/segment LCD feedback. Design consideration: the 100-TQFP package with fine 0.5 mm pin pitch requires careful PCB land-pattern design and good decoupling on every VCC/AVCC pin pair; the 16AU grade requires 2.7V minimum supply at full 16MHz operation, so derate clock speed or use the V grade at lower voltages. This page synthesizes distributor pricing, drop-in same-footprint alternatives, and practical design notes not found in the manufacturer datasheet, with pricing referenced as of 2026-09-18.

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ATMEGA6490-16AUR

ATMEGA6490-16AUR - 8-bit AVR MCU 64KB Flash 16MHz LCD | Microchip

The Microchip Technology ATMEGA6490-16AUR is a picoPower 8-bit AVR RISC microcontroller with 64KB ISP Flash, 2KB EEPROM, 4KB SRAM, an integrated LCD controller, and 16MHz maximum clock speed, housed in a 100-pin TQFP (14x14 mm) package for tape-and-reel assembly. An 8-bit AVR microcontroller is a single-chip embedded processor built on the AVR enhanced RISC architecture, in which most of the 130 instructions execute in a single clock cycle. Within the system hierarchy, it spans microcontroller -> embedded processor -> integrated circuit, combining program memory, data memory, peripherals, and CPU on one die. The ATmega6490 belongs to the LCD AVR family, which adds a segment LCD driver to the standard ATmega peripheral set. Key features include 64KB (32K x 16) self-programming Flash with read-while-write capability, 54/69 general purpose I/O lines, a 4 x 40 segment LCD controller, an 8-channel 10-bit ADC, and a JTAG interface for boundary-scan and on-chip debugging. The 16MHz rating at 4.5-5.5V delivers up to 16 MIPS throughput, while picoPower technology minimizes consumption in sleep modes for battery-backed designs. Technically, the AVR core uses 32 general purpose working registers directly connected to the ALU, giving single-cycle execution and high code density. ISP (in-system programmable) Flash allows firmware updates on the assembled board, and the EEPROM retains calibration data through power cycles. Typical applications include utility metering with LCD displays, industrial control panels, battery-powered instrumentation, and building automation front ends where an integrated segment LCD driver eliminates an external LCD controller IC. Design-wise, decouple VCC/AVCC with 100nF ceramics per supply pin and route LCD segment lines away from the analog front end to protect ADC accuracy. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA6490A-AUR

ATMEGA6490A-AUR - 8-bit AVR MCU, 64KB Flash, LCD | Microchip

The Microchip Technology ATMEGA6490A-AUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 2KB EEPROM, 4KB SRAM, and an integrated LCD controller, operating at up to 20MHz in a 100-pin TQFP (14x14 mm) package. An 8-bit AVR ATmega microcontroller is a single-chip computer that executes a reduced instruction set (RISC) entirely from embedded Flash. Within the power-management hierarchy, an MCU sits at the system-control layer above discrete logic and below application processors: it combines CPU, memory, timers, communication peripherals, and in this family, a segment LCD driver on one die. The AVR architecture connects 32 general-purpose working registers directly to the arithmetic logic unit (ALU), so two independent registers can be accessed in a single instruction executed in one clock cycle, achieving throughputs up to ten times faster than conventional CISC microcontrollers. Key features of the ATmega6490A include 54/69 general purpose I/O lines, a JTAG interface supporting boundary-scan, on-chip debugging and programming, a complete on-chip LCD controller with internal contrast control, and three flexible timers with compare modes and PWM. The 64KB Flash supports read-while-write self-programming, enabling in-system firmware updates without an external programmer. Technically, the AVR core executes 130 powerful instructions, most in a single clock cycle. The self-programming Flash enables bootloader implementations, while the LCD controller drives multi-segment displays directly, eliminating an external LCD driver and reducing BOM cost and board area in battery-powered instruments. Typical applications include utility metering with segmented LCD displays, handheld measurement instruments, industrial control panels, and battery-powered consumer devices where the low-power AVR core and integrated LCD drive are decisive. For design, budget the peripheral set early: with 69 I/O lines and an LCD panel, pin multiplexing between LCD segment lines and general-purpose I/O must be mapped before PCB layout, as segment pins overlap parallel ports. This page synthesizes distributor pricing, same-family drop-in alternatives, pinout guidance, and practical design notes not found together on the manufacturer datasheet. Pricing shown as of 2026-09-18.

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ATMEGA6490P-AUR

ATMEGA6490P-AUR - 8-bit AVR MCU 64KB Flash LCD | Microchip

The Microchip Technology ATMEGA6490P-AUR is a high-performance picoPower 8-bit AVR RISC microcontroller with 64 KB ISP Flash memory, 2 KB EEPROM, 4 KB SRAM, and an integrated segment LCD driver, packaged in a 100-pin TQFP (14x14 mm) for industrial temperature operation. An 8-bit AVR microcontroller is a reduced-instruction-set (RISC) single-chip computer that executes most of its 130 instructions in a single clock cycle. Within the power-management hierarchy, it combines the CPU, program memory, data memory, peripherals, and an LCD controller in one IC, making it a member of the broader microcontroller (MCU) family used in embedded systems. Key features include up to 20 MHz maximum clock frequency, 54 general purpose I/O lines (69 I/O including LCD segment pins), read-while-write self-programming Flash, and an on-chip LCD controller capable of driving a large glass with up to 4 backplane/common terminals. The picoPower technology delivers industry-low power consumption in all active and sleep modes, which is essential for battery-operated instruments. Technically, the AVR advanced RISC architecture provides 32 general purpose working registers directly connected to the ALU, allowing one-cycle execution and achieving throughput near 1 MIPS per MHz. In-system programmable (ISP) Flash with boot-section self-programming enables field firmware updates, while the on-chip debug via debugWIRE-type tooling and ICSP simplifies development with MPLAB Snap and similar programmers. Typical applications include utility metering with LCD displays, handheld measurement instruments, industrial control panels, and battery-powered human-interface devices where an integrated segment LCD driver removes the need for a separate LCD controller. When designing with this device, verify the clock-voltage relationship: operation at the full 20 MHz rating requires the higher end of the supply range, while lower supply voltages constrain the maximum safe clock frequency per the AVR frequency-vs-voltage curve in the manufacturer datasheet. This page synthesizes distributor listings, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet, with pricing references as of 2026-09-18.

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ATMEGA6490V-8AI

ATMEGA6490V-8AI - 8-Bit AVR MCU, 64KB Flash, 8MHz | Microchip

The Microchip ATMEGA6490V-8AI is an 8-bit AVR RISC microcontroller with 64KB of In-System Programmable (ISP) Flash memory, 4KB SRAM, 2KB EEPROM, and an integrated LCD controller, operating at up to 8 MHz in a 100-pin TQFP (14x14 mm) package. The V suffix indicates operation down to 1.8V, and the I suffix denotes an industrial -40C to +85C temperature range. A microcontroller (MCU) is a single-chip embedded computer that integrates a processor core, program memory, data memory, and peripherals such as timers, UARTs, and ADCs. Within the embedded system hierarchy, the ATmega6490V belongs to the AVR ATmega family of 8-bit MCUs, sitting in the large-memory, large-pin-count, LCD-capable tier used in human-interface equipment. Key features include an advanced RISC architecture with 130 mostly single-cycle instructions, read-while-write self-programming Flash, 54/69 general-purpose I/O lines, and an on-chip LCD driver that can drive up to 160 segment pixels, which eliminates an external LCD controller in metering and display applications. The picoPower technology provides low active and sleep current consumption for battery-powered designs. Technically, the device pairs the AVR core with 32 general-purpose working registers, a hardware multiplier, JTAG (debugWIRE/ICE support via JTAG on this family), and rich peripherals including USARTs, SPI, timers with PWM, and an analog comparator, making it suitable for firmware that combines UI rendering with measurement tasks. Typical applications include utility metering, LCD-based industrial panels, HVAC controllers, and battery-operated handheld instruments where a low-voltage supply (down to 1.8V) and integrated segment LCD drive reduce system cost. A key design consideration: the V-speed-grade device is limited to 8 MHz and, at supply voltages below 2.7V, safe operating frequency may be further constrained per the datasheet speed-versus-voltage curve; always derate clock speed for low-VDD designs. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with pricing referenced as of 2026-09-18.

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ATMEGA6490V-8AU

ATMEGA6490V-8AU - 8-bit AVR MCU 64KB 8MHz 100-TQFP | Microchip

The Microchip Technology ATMEGA6490V-8AU is a picoPower 8-bit AVR RISC microcontroller with 64KB (32K x 16) ISP Flash, 2KB EEPROM, 4KB SRAM, an integrated LCD controller, and a maximum clock frequency of 8MHz, housed in a 100-pin TQFP (14x14 mm) package. It belongs to the AVR ATmega family of microcontroller units (MCUs), which sit within the broader embedded processor hierarchy of 8-bit RISC microcontrollers -> microcontrollers -> integrated circuits. A microcontroller of this class combines a CPU core, program memory, data memory, and peripherals on a single chip, eliminating external glue logic for embedded control systems. The ATmega family is widely used wherever low power and deterministic single-cycle instruction execution are required. Key features include 130 powerful instructions with mostly single-cycle execution, read-while-write self-programming Flash, 54/69 general-purpose I/O lines, a JTAG interface for boundary-scan and on-chip debugging, and an integrated segment LCD driver that differentiates the ATmega6490 from standard ATmega parts. The picoPower technology family provides multiple sleep modes for ultra-low standby current in battery-powered designs. Architecturally, the AVR core uses a Harvard structure with 32 general-purpose working registers directly connected to the ALU, allowing one instruction to execute per clock cycle for high code efficiency. Self-programming Flash enables in-system programmability and boot-loader operation without external programmers in the field. Typical applications include battery-operated devices with LCD user interfaces such as utility meters, thermostats, handheld instruments, and industrial control panels. The built-in LCD controller reduces bill-of-material cost by removing an external LCD driver IC. Design consideration: the V-grade speed grade limits operation to 8MHz across the 1.8V to 5.5V supply range; if your application needs 16MHz at 5V, select the standard ATmega6490A/P grade instead. This page synthesizes distributor pricing, drop-in alternatives within the ATmega LCD family, and practical design notes not found in the manufacturer datasheet.

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ATMEGA6490V-8AUR

ATMEGA6490V-8AUR - 8-bit AVR MCU 64KB LCD 8MHz TQFP-100 | Microchip

The Microchip Technology ATMEGA6490V-8AUR is a picoPower 8-bit AVR RISC microcontroller with 64KB ISP Flash (32K x 16), 2KB EEPROM, 4KB SRAM, an integrated segment LCD controller, and up to 69 general purpose I/O lines, clocked at up to 8 MHz at 1.8V-5.5V and housed in a 100-pin TQFP (14x14 mm) package in tape-and-reel packing. An 8-bit AVR microcontroller is a single-chip processor built around the AVR enhanced RISC architecture, executing most instructions in a single clock cycle. Within the system hierarchy, it sits at the embedded processing layer of a design, combining a CPU core, program memory (Flash), data memory (SRAM and EEPROM), peripherals, and an LCD driver in one integrated circuit, replacing a discrete MCU plus external LCD controller combination. Key features include 64KB of self-programmable ISP Flash with read-while-write support, a JTAG interface for boundary-scan, on-chip debugging, and programming, an integrated LCD controller with support for up to 4x100 segment drive for glass directly driven by the MCU, and picoPower technology for microamp-level sleep currents. The 'V' speed grade guarantees full operation down to 1.8V, enabling single-cell or low-voltage battery designs. Technically, the device combines 32 general purpose working registers with a two-stage pipeline Harvard architecture, delivering close to 1 MIPS per MHz. Peripheral set includes multiple timers, USARTs, SPI, and TWI (I2C), all clocked from internal RC or external crystal sources with a brown-out detector and power-on reset for supply robustness. Typical applications include battery-powered metering (utility meters with direct LCD glass drive), handheld instruments with segmented displays, and industrial control panels where an MCU plus LCD in one chip reduces board area and quiescent power. A key design consideration: the 'V' grade tops out at 8 MHz; if your design needs 16 MHz or 20 MHz at 5V, select the ATmega6490A/P family instead. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA649A-AUR

ATMEGA649A-AUR - 8-Bit AVR MCU, 64KB Flash, TQFP-64 | Microchip

The Microchip Technology ATMEGA649A-AUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64 KB in-system programmable (ISP) Flash memory, 2 KB EEPROM, 4 KB SRAM, and an on-chip LCD controller, packaged in a 64-pin TQFP (14x14 mm) surface-mount package. The device executes most of its 130 powerful instructions in a single clock cycle and runs at clock speeds up to 16 MHz at 4.5V to 5.5V supply, delivering up to 16 MIPS of throughput. A microcontroller unit (MCU) is a complete self-contained computing system on a single chip, integrating a processor core, program memory, data memory, and peripherals. In the voltage regulator hierarchy of embedded systems, an MCU sits at the application layer, orchestrating sensors, displays, and actuators. The AVR family, originally developed by Atmel and now manufactured by Microchip Technology, is one of the most widely adopted 8-bit RISC MCU architectures, also forming the basis of the classic Arduino platform. Key differentiating features include self-programming Flash with read-while-write capability for field firmware updates, 54 general-purpose I/O lines, an integrated LCD controller with internal contrast control capable of driving segmented glass displays without an external driver, and a JTAG interface for boundary-scan testing and on-chip debugging and programming. Technically, the ATmega649A uses an advanced AVR RISC Harvard architecture with 32 general-purpose working registers directly connected to the arithmetic logic unit, allowing one-cycle execution of most instructions. Three flexible timer/counters with compare modes, internal and external interrupt sources, a programmable serial USART, and a byte-oriented two-wire serial interface round out the peripheral set. Typical applications include utility metering and battery-powered instruments that require an LCD display, industrial control panels, hand-held measurement devices, and consumer appliances needing segment-display feedback with minimal external components. When designing, note the 5V operating window of 4.5V to 5.5V; select the ATmega649V variant for lower-voltage 2.7V to 5.5V operation at reduced clock speed. This page synthesizes verified distributor data, pin-compatible drop-in alternatives, drop-in comparison tables, and practical design notes not found in the manufacturer datasheet.

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ATMEGA649A-MU

ATMEGA649A-MU - 8-bit AVR MCU 64KB Flash 16MHz | Microchip

The Microchip Technology ATMEGA649A-MU is an 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 2KB EEPROM, 4KB SRAM, and a maximum clock speed of 16 MHz, housed in a 64-pin QFN (9x9 mm) package with exposed pad. An 8-bit microcontroller is a single-chip computer whose CPU processes data in 8-bit words. Within the embedded systems hierarchy, the AVR ATmega family sits under the broader microcontroller (MCU) category, which combines a processor core, program memory, data memory, and peripherals in one integrated circuit, making it a fundamental building block of embedded control systems alongside competing architectures such as PIC, 8051, and ARM Cortex-M based devices. Key features of the ATMEGA649A-MU include 64KB of in-system programmable Flash with read-while-write capability, 54 to 69 general purpose I/O lines depending on package, 32 general purpose working registers, and an on-chip JTAG interface for boundary-scan and in-system debugging. The AVR enhanced RISC core executes most instructions in a single clock cycle, delivering throughput of up to 16 MIPS at 16 MHz. Technically, the device belongs to the ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P family and operates from a supply voltage of 4.5V to 5.5V at the full 16 MHz speed grade (industrial temperature, 20 MHz capable per some package grades). Peripherals typically include USART, SPI, and two-wire interfaces, timers/counters, and an LCD controller on the 649 variant, enabling direct segment LCD driving. Typical applications include industrial control panels with segment LCD displays, consumer appliance user interfaces, metering products, and low-power battery-backed measurement instruments where single-cycle RISC execution and rich I/O reduce external component count. A key design consideration is supply voltage versus clock speed: at 4.5V to 5.5V the device runs at its rated 16 MHz; operating at lower voltages requires derating the maximum clock frequency per the datasheet speed-versus-voltage curve. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet, giving engineers a single decision-ready reference for the ATMEGA649A-MU.

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ATMEGA649P-AUR

ATMEGA649P-AUR - AVR 8-bit MCU 64KB Flash LCD | Microchip

The Microchip Technology ATMEGA649P-AUR is a picoPower 8-bit AVR RISC microcontroller with 64KB ISP Flash memory (read-while-write), 2KB EEPROM, 4KB SRAM, and an integrated LCD controller, clocked at up to 16MHz in a 64-pin TQFP package with industrial temperature rating and green/RoHS tape-and-reel packing. An 8-bit AVR microcontroller (MCU) is a Harvard-architecture processor that executes most instructions in a single clock cycle, sitting within the broader hierarchy of embedded processors under microcontrollers, under the power- and cost-sensitive embedded systems category. The ATmega649P belongs to the ATmega LCD series (ATmega169A/PA/329A/PA/3290A/PA/649A/P/6490A/P family), which pairs general-purpose MCU peripherals with a segment LCD driver for glass-driving applications. Key features include 54/69 general purpose I/O lines, 32 general purpose working registers, a JTAG interface for on-chip debug and boundary scan, and picoPower technology for ultra-low sleep-mode consumption. The P-suffix devices are drop-in replacements for the non-P ATmega649, produced on an improved process with lower power figures, and are subject to the same qualification and production test flow per Microchip application note AVR534. The peripheral set includes an 8-bit timer/counter with PWM, a 16-bit timer/counter, SPI, USART, an analog comparator, a 10-bit ADC on related family members, and an LCD controller capable of driving segment glass directly - eliminating an external LCD driver IC in metering and appliance designs. ISP Flash with read-while-write allows firmware updates in the field without halting execution. Typical applications include utility metering (energy and water meters with LCD displays), battery-powered handheld instruments, white-goods appliance panels, and industrial HMI front-ends where the integrated LCD driver and low sleep current extend battery life. Design consideration: the picoPower benefits are realized only with correct sleep-mode selection (power-save or standby) and disabled unused peripherals; the 16MHz maximum CPU frequency is voltage-dependent, so derate clock speed at the low end of the supply range. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA649P-MU

ATMEGA649P-MU - 8-bit AVR MCU 64KB Flash LCD 16MHz | Microchip

The Microchip Technology ATMEGA649P-MU is a picoPower 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 2KB EEPROM, 4KB SRAM, an integrated LCD controller, and up to 16MHz operation, housed in a 64-pin QFN (9x9 mm) package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals such as timers, USART, SPI, and analog comparators. The 8-bit AVR ATmega family sits within the broader microcontroller hierarchy (embedded processor -> microcontroller -> 8-bit MCU -> AVR ATmega), and the ATmega649P variant adds a segment LCD driver that many general-purpose MCUs lack, making it a complete human-interface solution on a single chip. Key features include 64KB of in-system programmable Flash with read-while-write capability, 54/69 general purpose I/O lines, 32 general purpose working registers, and a JTAG interface for on-chip debugging and boundary-scan. The picoPower technology delivers industry-leading low power consumption across all sleep modes, supporting battery-powered designs. The integrated LCD controller can drive segmented displays directly, eliminating an external LCD driver IC. Architecturally, the AVR core executes most instructions in a single clock cycle through its Harvard-architecture pipelining, achieving up to 16 MIPS at 16MHz. The device operates from a 1.8V to 5.5V supply, covering both battery and 5V industrial rails, and is rated for industrial temperature ranges. Typical applications include utility metering with LCD displays, handheld measurement instruments, battery-operated industrial panels, and consumer appliances requiring segmented displays and long battery life. When designing with this device, budget the Flash for both code and read-while-write data logging, and place a 0.1uF decoupling capacitor on each supply pin pair with a solid ground paddle connection under the QFN exposed pad. This page synthesizes verified distributor pricing, drop-in family alternatives, and practical design guidance not found on the manufacturer datasheet alone.

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ATMEGA649P-MUR

ATMEGA649P-MUR - 16MHz 8-bit AVR MCU, 64KB Flash, 64-QFN | Microchip

The Microchip Technology ATMEGA649P-MUR is a high-performance, low-power 8-bit AVR RISC-based picoPower microcontroller operating at up to 16 MHz, equipped with 64 KB of in-system self-programmable Flash, 2 KB EEPROM, and 4 KB SRAM, and housed in a 64-pin QFN (9x9 mm) package with exposed pad. It provides 54/69 general-purpose I/O lines, 32 general-purpose working registers, a JTAG interface, an on-chip LCD controller with internal contrast control, three flexible timer/counters with compare modes, USART, SPI, TWI (I2C), a 10-bit ADC, and a watchdog timer with separate on-chip oscillator. An 8-bit AVR microcontroller is a single-chip computer built around the AVR RISC instruction set. AVR MCUs execute most instructions in a single clock cycle, enabling high throughput at low clock frequencies and low power consumption. The 'picoPower' designation indicates that the device uses advanced process and design techniques to reduce active and sleep-mode current, extending battery life in energy-harvesting and portable applications. ATmega MCUs sit within Microchip's megaAVR family, positioned above the ATtiny family for richer peripheral integration while retaining 8-bit architectural simplicity. Key features include 64 KB Flash with read-while-write support, 2 KB EEPROM, 4 KB SRAM, an integrated LCD controller supporting up to 4x25 segments, 10-bit ADC with up to 8 channels, two 8-bit and one 16-bit timer/counter, and a real-time counter with separate oscillator. The device operates from 2.7 V to 5.5 V and supports industrial temperature ranges of -40C to +85C. The AVR core uses a 32-register fast-access register file, a single-cycle ALU, and a Harvard architecture with separate program and data buses. This design delivers close to 1 MIPS per MHz, so 16 MHz yields roughly 16 MIPS of compute throughput. Hardware multipliers are not present, but the architecture's deterministic instruction timing simplifies real-time control tasks. Typical applications include LCD-based human-machine interfaces, industrial control panels, metering and instrumentation, medical handheld devices, and battery-powered sensor hubs. The integrated LCD controller eliminates the need for an external display driver, reducing BOM cost and PCB area in segment-LCD products. When designing with this part, select the correct power-down sleep mode (Idle, Power-save, or Standby) for the application and place a 100 nF decoupling capacitor adjacent to each VCC pin. The exposed thermal pad on the QFN package must be soldered to a copper pour to meet thermal and electrical specifications.

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ATMEGA649V-8AI

ATMEGA649V-8AI - 8MHz AVR MCU 64KB Flash LCD | Microchip

The Microchip Technology ATMEGA649V-8AI is an 8-bit AVR RISC microcontroller with 64 KB of self-programming ISP Flash memory, 2 KB EEPROM, 4 KB SRAM, and an integrated segment LCD controller, rated for 8 MHz operation at 1.8V to 5.5V and housed in a 64-pin TQFP (14x14 mm) package for industrial temperature ranges. An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most of its 130 powerful instructions in a single clock cycle, sitting within the broader microcontroller hierarchy of MCU -> embedded processor -> integrated circuit. Microcontrollers like the ATMEGA649V combine CPU, memory, and peripherals on one die, making them the backbone of cost-sensitive embedded systems that must sense, compute, drive displays, and communicate without external components. Key differentiating features include the on-chip LCD driver with up to 4x40 segment driving capability, read-while-write self-programming Flash for field firmware updates, 54 general-purpose I/O lines, and a rich analog and timer peripheral set including an 8-channel 10-bit ADC, two 8-bit and two 16-bit timers, and a JTAG interface for on-chip debugging and boundary scan. The low-voltage V-grade operation down to 1.8V supports battery-powered designs. The AVR advanced RISC architecture provides 32 general-purpose working registers directly connected to the ALU, delivering up to 8 MIPS throughput at the maximum 8 MHz clock. In-System Programmable (ISP) Flash via the SPI interface, together with ICSP support using tools such as the MPLAB SNAP, enables in-circuit reprogramming without removing the device from the board. Typical applications include battery-powered instrumentation with LCD displays, utility metering, handheld industrial terminals, HVAC control panels, and low-power sensor nodes - all cases where the integrated segment LCD driver and 1.8V operation eliminate external display circuitry and extend battery life. When designing with this part, note that maximum clock frequency scales with supply voltage: the 8 MHz rating applies across the full 1.8V to 5.5V range for this V-grade device, but system designers should verify ADC reference and timing budgets at the low end of the supply range. This page synthesizes distributor inventory data, pin-compatible drop-in alternatives, and practical design notes beyond what the manufacturer datasheet alone provides.

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ATMEGA649V-8AU

ATMEGA649V-8AU - 64KB Flash 8MHz LCD AVR MCU | Microchip

The Microchip Technology ATMEGA649V-8AU is an 8-bit AVR RISC microcontroller delivering 64KB of ISP Flash memory, 2KB EEPROM, and 4KB SRAM at a maximum clock speed of 8MHz, housed in a 64-pin TQFP (14x14mm) package with an integrated segment LCD driver. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals on one die. Within the embedded hierarchy, the ATmega649 sits in Microchip's AVR ATmega family of 8-bit microcontrollers, a product class that evolved from simple 4-bit MCUs and today competes with ARM Cortex-M0 parts in cost-sensitive, low-power applications. Key features include 54 general purpose I/O lines in the 64-pin package, an on-chip LCD controller capable of driving up to 25 segments x 4 commons, a JTAG interface for boundary-scan and on-chip debugging, and read-while-write Flash for self-programming bootloaders. The low-voltage V variant operates from 1.8V to 5.5V, enabling direct battery-powered designs. Technically, the AVR core uses a Harvard architecture with 32 general purpose working registers directly connected to the ALU, executing most instructions in a single clock cycle - yielding up to 8 MIPS at 8MHz. The V-speed grade trades peak performance for a wide 1.8V-5.5V operating range, and the digchip listing notes the newer ATMEGA649A as the recommended successor. Typical applications include battery-powered metering displays, appliance front panels with segmented LCDs, industrial handheld instruments, and low-power sensor nodes where the integrated LCD driver eliminates an external LCD controller IC. A key design consideration is clock selection: at 3.3V the maximum safe CPU frequency derates below 8MHz, so verify the speed-grade graph in the manufacturer datasheet against your supply voltage. This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA649V-8AUR

ATMEGA649V-8AUR - 8MHz AVR MCU 64KB Flash LCD | Microchip

The Microchip Technology ATMEGA649V-8AUR is a high-performance, low-power 8-bit AVR RISC microcontroller combining 64KB ISP Flash memory with read-while-write capability, 2KB EEPROM, 4KB SRAM, and 54 general-purpose I/O lines, running at up to 8 MHz and housed in a 64-pin TQFP (14x14 mm) package. A microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripheral functions such as timers, UARTs, ADCs, and display drivers. The AVR family, originally developed by Atmel and now part of Microchip Technology, popularized the Harvard-architecture RISC design in which most instructions execute in a single clock cycle. Microcontrollers sit at the center of the embedded-system hierarchy, bridging bare logic ICs and full application processors, and are classified as 8-bit, 16-bit, or 32-bit depending on the datapath width. Key features of the ATMEGA649V-8AUR include the integrated LCD controller supporting up to 132 segments (4x40), which is the defining feature of this ATmega649 variant, plus a JTAG interface for boundary-scan and on-chip debugging, 32 general-purpose working registers, and in-system self-programmable Flash. The V speed grade supports 1.8V to 5.5V operation at up to 8 MHz, making it suitable for battery-powered designs. Architecturally, the AVR core executes most instructions in a single clock cycle, delivering up to 8 MIPS at 8 MHz. Read-while-write Flash allows firmware updates without halting execution. Peripherals typically include 8/16-bit timers, USART, SPI, TWI (I2C), a 10-bit ADC, and an analog comparator, together with the segment LCD driver that differentiates the 649 from the 640/644/645 family members. Typical applications include battery-powered utility meters, panel meters with segment LCD displays, industrial handheld instruments, and low-power human-machine interfaces where an integrated LCD driver eliminates an external display controller. When designing with this device, remember the V variant is limited to 8 MHz; the faster 16 MHz code requires the ATmega649A/649P family at 5V. Verify the LCD bias resistor network and contrast capacitor values against the manufacturer datasheet for the target panel configuration. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA649V-8MI

ATMEGA649V-8MI - AVR 8-Bit MCU, 64KB, 8MHz | Microchip

The Microchip Technology ATMEGA649V-8MI is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB of self-programming In-System Programmable Flash (32K x 16), an integrated LCD controller, and an 8 MHz maximum clock speed, housed in a 64-pin QFN (9x9 mm, VFQFN with exposed pad) package. The V suffix denotes its 1.8V to 5.5V wide operating voltage range, and the MI suffix denotes industrial temperature grade (-40C to +85C). An 8-bit AVR microcontroller is a single-chip processor built on the AVR advanced RISC architecture, which executes most of its 130 powerful instructions in a single clock cycle. Within the embedded processor hierarchy, the ATmega649 belongs to the AVR ATmega family -> 8-bit microcontroller -> microcontroller unit (MCU) -> semiconductor integrated circuit. The ATmega649 adds a segment LCD driver (up to 4x25 or 8x25 segments) that many general-purpose MCUs lack, making it a staple for battery-powered instruments with glass or custom LCD displays. Key features include 64KB self-programming Flash, 2KB EEPROM, 4KB internal SRAM, an advanced RISC core, JTAG (IEEE 1149.1) boundary-scan and on-chip debugging, and a rich peripheral set: 8-channel 10-bit ADC, analog comparator, USART, SPI and Two-Wire Interface (TWI/I2C), timers/counters with PWM, and the LCD controller. Power management modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby) enable microamp-class sleep currents for battery designs. Architecturally, the AVR core uses Harvard structure with separate program and data buses, single-cycle ALU operation, and 32 general-purpose working registers, delivering roughly 1 MIPS per MHz. At 1.8V operation the part runs at up to 4 MHz, with 8 MHz permitted at 2.7V and above, trading speed against voltage for low-power designs. Typical applications include battery-powered meters with LCD displays, industrial instrumentation, building controllers, and portable medical devices where a low-voltage MCU with an integrated LCD driver reduces BOM cost and board area. Design consideration: match your clock speed to the operating voltage per the AVR speed-grade derating curve; running 8 MHz below 2.7V violates the datasheet frequency-voltage envelope. This page synthesizes distributor pricing, drop-in alternatives, design notes, and FAQ content not found in the manufacturer datasheet.

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ATMEGA64A-AN

ATMEGA64A-AN - 8-bit AVR MCU, 64KB Flash, 16MHz | Microchip

The Microchip Technology ATMEGA64A-AN is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 2KB EEPROM, 4KB SRAM, and a maximum clock frequency of 16MHz, housed in a 64-pin TQFP (14x14 mm) package rated to 105C. An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, executing most instructions in a single clock cycle. Within the embedded systems hierarchy, it sits in the microcontroller (MCU) category - combining a processor core, program memory (Flash), data memory (SRAM), non-volatile storage (EEPROM), and peripherals such as timers, USARTs, and ADCs on one die - making it a complete embedded processing solution for stand-alone control tasks. Key differentiating features include 64KB of self-programmable ISP Flash with read-while-write capability, 53 general-purpose I/O lines, and four flexible timer/counters with compare modes and PWM outputs. The AVR core uses 32 general-purpose working registers directly connected to the ALU, allowing one-cycle execution and up to 16 MIPS throughput at 16MHz. Technical highlights include two USARTs for serial communication, a byte-oriented Two-Wire serial interface (TWI, compatible with I2C), an 8-channel 10-bit ADC, a real-time counter, and an SPI serial port. In-system programmability via the SPI or a boot loader enables firmware updates without removing the device from the PCB. Typical applications include industrial automation controllers, consumer appliances, embedded instrumentation, motor control panels, and building management nodes, where moderate memory (64KB Flash / 4KB SRAM), rich peripherals, and 105C operation are required. Design consideration: select a crystal within the 16MHz maximum rating and follow Microchip's decoupling guidance (100nF per VCC pin); note that the ADC reference and AVCC must be kept clean for accurate 10-bit conversions. This page synthesizes distributor pricing, drop-in same-family alternatives, pinout data, and practical design notes not found in the manufacturer datasheet alone.

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ATMEGA64A-AUR

ATMEGA64A-AUR - 8-bit AVR MCU 64KB Flash 16MHz TQFP-64 | Microchip

The Microchip Technology ATMEGA64A-AUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash memory (32K x 16), 2KB EEPROM, 4KB SRAM, 53 general purpose I/O lines, and a maximum operating frequency of 16MHz, housed in a 64-pin TQFP (14x14mm) surface-mount package supplied in Tape & Reel. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest level of the embedded computing hierarchy (MCU -> embedded processor -> computing system). The AVR ATmega family uses an advanced RISC architecture with 130 powerful instructions, most executed in a single clock cycle, giving roughly 16 MIPS throughput at 16MHz. Key features include read-while-write ISP Flash for self-programming, two USARTs, four flexible timer/counters with compare modes and PWM, an 8-channel 10-bit ADC, byte-oriented Two-Wire Serial Interface (TWI/I2C), SPI, JTAG for boundary scan and on-chip debugging, and an internal oscillator option that reduces external component count. Technically, the device provides 32 general purpose working registers directly connected to the ALU, allowing one-cycle instruction execution and C-compiler-friendly code density. The ATmega64A is 100% pin compatible with the legacy ATmega103, and the ATmega64A summary datasheet documents migration paths to and from ATmega128 parts, protecting long-term PCB investments. Typical applications include industrial control and automation nodes, HVAC and building controllers, motor-adjacent sensing boards, and instrumentation front ends where the 10-bit ADC, dual USART, and PWM channels cover most interface needs from a single chip. Design considerations: for UART or precise timing, prefer a crystal on XTAL1/XTAL2 because the internal RC oscillator trades accuracy (±2% after calibration) for board space; budget the 4KB SRAM carefully when using large frame buffers or protocol stacks. This page synthesizes verified distributor listings, pinout data, drop-in alternatives, and practical design guidance not consolidated in the manufacturer datasheet.

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ATMEGA64A-MN

ATMEGA64A-MN - 8-bit AVR MCU, 64KB Flash, 16MHz | Microchip

The Microchip Technology ATMEGA64A-MN is a high-performance, low-power 8-bit AVR RISC microcontroller combining 64KB (32K x 16) ISP Flash memory with read-while-write capability, 2KB EEPROM, 4KB SRAM, and up to 16MHz operation, housed in a 64-pin QFN (9x9 mm, MLF) package with exposed pad and a 105C temperature rating. An 8-bit microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single chip, sitting within the broader hierarchy of semiconductor devices: MCU -> embedded processor -> integrated circuit. The AVR architecture uses a Harvard structure with 32 general-purpose working registers directly connected to the ALU, allowing most instructions to execute in a single clock cycle, delivering up to 16 MIPS at 16MHz. Key features include In-System Programmable (ISP) Flash with boot-code section for self-programming, 53 general-purpose I/O lines, four flexible timer/counters with compare modes and PWM, a real-time counter, plus USART, SPI, TWI (I2C), and an 8-channel 10-bit ADC. The ATmega64A is 100% pin compatible with the ATmega103, enabling drop-in replacement on existing PCBs per Microchip's migration application notes. The enhanced AVR core executes powerful instructions in one cycle, and the device supports debugWIRE-style on-chip debugging via In-Circuit Serial Programming (ICSP) using two I/O pins plus reset, compatible with tools such as the MPLAB SNAP programmer. Typical applications include industrial automation and control panels, embedded instrumentation, consumer appliances, motor control interfaces, and legacy ATmega103/ATmega64 system redesigns that require flash memory upgrades without PCB respin. When designing with this device, confirm supply voltage (3.3V or 5V) against maximum clock frequency derating curves, and place 100nF decoupling capacitors at all VCC/AVCC pin pairs close to the exposed ground pad. This page synthesizes distributor pricing, drop-in alternatives, package pinout data, and practical design notes not consolidated in the manufacturer datasheet. Pricing data is as of 2026-09-18.

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ATMEGA64A-MNR

ATMEGA64A-MNR - 8-bit AVR MCU 64KB Flash 16MHz | Microchip

The Microchip ATMEGA64A-MNR is an 8-bit AVR RISC microcontroller with 64KB ISP Flash memory, 2KB EEPROM, 4KB SRAM, and a 16MHz maximum clock frequency, housed in a 64-pin QFN/MLF (9x9 mm) exposed-pad package rated to 105C. An 8-bit AVR microcontroller is a Harvard-architecture processor that executes most instructions in a single clock cycle, sitting at the entry level of the embedded processor hierarchy (MCU -> embedded processor -> system-on-chip). MCUs integrate CPU, program memory, data memory, timers, and peripherals on a single die, making them the workhorse of embedded control systems in industrial, consumer, and automotive electronics. The ATmega64A combines 64KB of self-programmable Flash with read-while-write support, 53 general-purpose I/O lines, and 32 general-purpose working registers, all directly connected to the ALU for fast single-cycle operation. Its peripheral set includes 8-channel 10-bit ADC, two 8-bit and two 16-bit timers with PWM, two USARTs, TWI (I2C), SPI, analog comparator, and an on-chip JTAG boundary-scan/debug interface. The improved -A variant is a functionally identical, drop-in replacement for the original ATmega64 with reduced current consumption, per Microchip application note AVR524. Architecturally, the AVR core uses a two-stage pipeline with fast register file access, achieving throughputs close to 1 MIPS per MHz. Operating from 2.7V to 5.5V, the device supports six sleep modes including power-down and standby for aggressive energy budgets in battery-operated systems. In-system programming (ISP) via SPI and boot-section self-programming enable field firmware updates without removing the device from the PCB. Typical applications include industrial automation controllers, HVAC and building-control nodes, motor-control and inverter boards, battery-powered instrumentation, and embedded communication bridges using the dual USART or I2C/SPI links. When designing with the 64-QFN package, pay particular attention to the exposed thermal pad, which must be soldered to a solid ground pour for both electrical grounding and heat dissipation, and to JTAG pin sharing with PC2-PC7 which must be disabled via fuse if those pins are needed as GPIO. This page synthesizes verified distributor data, drop-in same-package alternatives, and practical layout guidance not found in the manufacturer datasheet. Pricing shown is as of 2026-09-18 and reflects typical distributor tiers; availability and lead time should be confirmed at order time.

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ATMEGA64A-MU

ATMEGA64A-MU - 8-Bit AVR MCU, 16MHz, 64KB Flash | Microchip

The Microchip ATMEGA64A-MU is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash memory (32K x 16), 2KB EEPROM, 4KB SRAM, and a 16 MHz maximum operating frequency, 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 at the low-power end of the power-management and embedded-control hierarchy. The ATmega family is widely used in industrial control, consumer appliances, and embedded systems where flash self-programmability and rich peripherals matter more than raw compute throughput. Key features include 53 general-purpose I/O lines, 32 general-purpose working registers, four flexible timer/counters with compare modes, two USARTs, an 8-channel 10-bit ADC, a byte-oriented Two-Wire Interface (I2C-compatible), SPI, and a JTAG interface for on-chip debug and boundary scan. Read-while-write ISP Flash enables firmware updates in the field without halting code execution. The AVR core combines a 131-instruction set with single-cycle execution, delivering up to 16 MIPS at 16 MHz. A real-time counter with separate oscillator supports RTC applications, while the enhanced power-save, ADC noise reduction, and standby idle modes let designers trade performance against microamp-level sleep currents. The ATmega64A is 100% pin compatible with the ATmega103 and can replace the ATmega103 on current printed circuit boards. Typical applications include industrial automation controllers, HVAC and building-control nodes, battery-powered instrumentation, motor-control front ends, and embedded consumer devices requiring multiple communication interfaces. Design consideration: at 16 MHz, keep decoupling capacitors close to the multiple VCC/GND pin pairs, and use the JTAG port for in-circuit debugging before disabling it as a general-purpose I/O. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA64A-MUR

ATMEGA64A-MUR - AVR 8-bit MCU 64KB Flash 16MHz QFN-64 | Microchip

The Microchip (Atmel) ATMEGA64A-MUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 64KB ISP Flash (32K x 16), 2KB EEPROM, 4KB SRAM, 53 general-purpose I/O lines, and a maximum clock speed of 16MHz, supplied in a 64-pin QFN (9x9 mm, VFQFN exposed pad) package on tape and reel. An 8-bit microcontroller (MCU) is a self-contained computing chip integrating a processor core, program memory, data memory, and peripherals on a single die, sitting at the device level of the embedded systems hierarchy (embedded system -> MCU -> AVR core -> RISC CPU). The AVR ATmega family from Microchip uses an advanced RISC architecture with Harvard memory mapping, allowing most instructions to execute in a single clock cycle. Key features include the AVR advanced RISC core with 130 powerful instructions, 32 general-purpose working registers executing most instructions in one cycle, in-system self-programmable Flash with read-while-write capability, a real-time counter, and four flexible timer/counters supporting PWM generation and input capture. The wide supply range of 2.7V to 5.5V supports both 3.3V and 5V designs, and the internal oscillator option reduces external component count. Architecturally, the ATmega64A executes pipelined single-cycle instructions from Flash while a separate small EEPROM retains non-volatile parameters, and the SRAM data space is extended via external memory interfacing. JTAG/ISP programming support enables in-field firmware updates. The A-suffix die is Microchip's refreshed ATmega64 process node with improved reliability over the original ATmega64. Typical applications include industrial automation controllers, sensor hubs and data loggers, LED and motor control, HVAC and building control systems, and legacy ATmega103 board redesigns, since the ATmega64A is 100% pin compatible with the ATmega103 and can replace it on existing printed circuit boards. Design consideration: operate within the industrial temperature grade and verify 16MHz timing at the low end of the 2.7V-5.5V supply range, as maximum safe frequency depends on VCC; decouple all supply pins with 100nF ceramics close to the exposed pad. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.

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产品（18721)

ATMEGA649-16MUR - 8-bit AVR MCU 64KB 16MHz LCD | Microchip

ATMEGA6490-16AI - 64KB Flash 16MHz AVR LCD MCU | Microchip

ATMEGA6490-16AU - 8-Bit AVR MCU 16MHz 64KB LCD | Microchip

ATMEGA6490-16AUR - 8-bit AVR MCU 64KB Flash 16MHz LCD | Microchip

ATMEGA6490A-AUR - 8-bit AVR MCU, 64KB Flash, LCD | Microchip

ATMEGA6490P-AUR - 8-bit AVR MCU 64KB Flash LCD | Microchip

ATMEGA6490V-8AI - 8-Bit AVR MCU, 64KB Flash, 8MHz | Microchip

ATMEGA6490V-8AU - 8-bit AVR MCU 64KB 8MHz 100-TQFP | Microchip

ATMEGA6490V-8AUR - 8-bit AVR MCU 64KB LCD 8MHz TQFP-100 | Microchip

ATMEGA649A-AUR - 8-Bit AVR MCU, 64KB Flash, TQFP-64 | Microchip

ATMEGA649A-MU - 8-bit AVR MCU 64KB Flash 16MHz | Microchip

ATMEGA649P-AUR - AVR 8-bit MCU 64KB Flash LCD | Microchip

ATMEGA649P-MU - 8-bit AVR MCU 64KB Flash LCD 16MHz | Microchip

ATMEGA649P-MUR - 16MHz 8-bit AVR MCU, 64KB Flash, 64-QFN | Microchip

ATMEGA649V-8AI - 8MHz AVR MCU 64KB Flash LCD | Microchip

ATMEGA649V-8AU - 64KB Flash 8MHz LCD AVR MCU | Microchip

ATMEGA649V-8AUR - 8MHz AVR MCU 64KB Flash LCD | Microchip

ATMEGA649V-8MI - AVR 8-Bit MCU, 64KB, 8MHz | Microchip

ATMEGA64A-AN - 8-bit AVR MCU, 64KB Flash, 16MHz | Microchip

ATMEGA64A-AUR - 8-bit AVR MCU 64KB Flash 16MHz TQFP-64 | Microchip

ATMEGA64A-MN - 8-bit AVR MCU, 64KB Flash, 16MHz | Microchip

ATMEGA64A-MNR - 8-bit AVR MCU 64KB Flash 16MHz | Microchip

ATMEGA64A-MU - 8-Bit AVR MCU, 16MHz, 64KB Flash | Microchip

ATMEGA64A-MUR - AVR 8-bit MCU 64KB Flash 16MHz QFN-64 | Microchip