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ATMEGA8515L-8MU - 8KB Flash AVR MCU 44-VQFN | Microchip
ATMEGA8515L-8MU

ATMEGA8515L-8MU - 8KB Flash AVR MCU 44-VQFN | Microchip

The Microchip Technology ATMEGA8515L-8MU is an 8-bit AVR RISC microcontroller with 8KB in-system programmable Flash (4K x 16), 512B EEPROM, 512B SRAM, and support for up to 64KB external memory, housed in a 44-pin VQFN (7x7 mm) surface-mount package with exposed pad. It runs at up to 8 MHz across the 2.7V to 5.5V supply range, delivering approximately 8 MIPS throughput. A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals onto a single chip, forming the lowest layer of the embedded-system hierarchy: transistor -> logic IC -> microcontroller -> embedded system. The AVR architecture uses a Harvard design with 130 powerful instructions, most executing in a single clock cycle, which yields high code efficiency for C and assembly programs. Key features of the ATMEGA8515L-8MU include in-system programmable (ISP) Flash via SPI, one 16-bit timer and two 8-bit timers with PWM outputs, a USART serial port, SPI interface, external memory bus (AD0-AD7 / A0-A7 ports), an on-chip analog comparator, four external interrupt sources, and low-power idle and power-down sleep modes. The 'L' suffix denotes the low-voltage 2.7V-5.5V grade, and the -8 speed grade caps the clock at 8 MHz. Technically, the AVR core executes most instructions in one cycle through its pipelined RISC datapath, so an 8 MHz ATMEGA8515L-8MU approaches the effective throughput of far faster CISC MCUs on 8-bit workloads. The 512B EEPROM retains calibration data through power cycles, while the 64KB external SRAM expansion suits data-logging designs. Typical applications include industrial control panels, motor-driven appliances, keypad/display terminals, and legacy AVR drop-in designs where the VQFN footprint must be preserved. Design consideration: choose the MLF/VQFN thermal pad for heat sinking and ground return, and always verify ISP programming voltage and fuse settings (CKOPT, BODLEVEL) before flashing at 5V. This page synthesizes distributor pricing, pinout guidance, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.

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ATMEGA8515L-8PC - 8-bit AVR MCU 8KB Flash 40-PDIP | Microchip
ATMEGA8515L-8PC

ATMEGA8515L-8PC - 8-bit AVR MCU 8KB Flash 40-PDIP | Microchip

The Microchip Technology (Atmel) ATMEGA8515L-8PC is an 8-bit AVR RISC microcontroller with 8 KB of in-system programmable Flash memory, 512 B EEPROM, 544 B internal SRAM (expandable to 64 KB external SRAM), and 8 MHz maximum clock speed, housed in a 40-pin PDIP through-hole package rated for 0C to +70C operation. An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, in which most of the 130 powerful instructions execute in a single clock cycle. Within the power-management hierarchy, an MCU integrates processor core, program memory, data memory, and peripherals (SPI, UART/USART, external memory interface) into one package, replacing multi-chip processor systems in embedded designs. Key features include up to 8 MIPS throughput at 8 MHz, 32 general-purpose working registers, in-system self-programming Flash, an external bus interface (EBI/EMI) for up to 64 KB of external SRAM, and low-voltage 'L' grade operation typically spanning 2.7V to 5.5V. The through-hole 40-PDIP (0.600 inch, 15.24 mm) format makes the part ideal for prototyping, sockets, and legacy through-hole production lines. Architecturally, the Harvard-architecture AVR core separates program and data buses, achieving near one MIPS per MHz efficiency. Fully static operation allows the clock to be stopped without register loss, supporting aggressive power management in battery-powered designs. Typical applications include industrial control boards, legacy equipment maintenance and repair, educational/training platforms, and low-volume instrumentation where Flash reprogrammability and DIP sockets simplify field updates. Design consideration: the L-grade device tops out at 8 MHz; for 16 MHz designs choose the non-L ATmega8515-16 grades instead, as overclocking beyond the speed-grade limit violates datasheet timing margins. This page synthesizes distributor availability, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8PI - 8-bit AVR MCU 8KB Flash 40-DIP | Microchip
ATMEGA8515L-8PI

ATMEGA8515L-8PI - 8-bit AVR MCU 8KB Flash 40-DIP | Microchip

The Microchip Technology ATMEGA8515L-8PI is a low-power 8-bit AVR RISC microcontroller with 8 KB of self-programming In-System Programmable Flash, 512 B EEPROM, 512 B internal SRAM plus support for up to 64 KB external SRAM, executing up to 8 MIPS at its 8 MHz maximum clock, housed in a 40-pin PDIP (0.600 in, 15.24 mm) package rated for -40C to +85C operation. A microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. The ATMEGA8515L sits in the 8-bit microcontroller hierarchy: AVR core -> 8-bit MCU -> embedded processor, a class widely used for embedded control in appliances, industrial equipment, and hobby electronics. Key features include the AVR enhanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle, and 32 general-purpose working registers that deliver up to 1 MIPS per MHz throughput. The L-grade part operates from 2.7 V to 5.5 V, making it suitable for both 3.3 V and 5 V systems. The external memory interface (ALE, RD, WR, multiplexed address/data on Ports A and C) differentiates it from smaller AVRs such as the ATmega8. Technically, the device is fully static, allowing clock frequencies down to DC without state loss. Peripherals include one 16-bit timer and 8-bit timers, a USART, SPI interface, and three external interrupt sources; notably, the ATmega8515 family has no internal ADC, which is a key selection consideration versus the ATmega8/ATmega32 families. Typical applications include legacy 8051-pinout replacement designs, industrial control boards, external-memory-expansion systems, and educational or laboratory platforms where through-hole 40-DIP packaging simplifies prototyping and socket-based field replacement. Design consideration: at 5 V and 8 MHz, keep the power supply within the 4.5 V to 5.5 V full-speed window; below 4.5 V the maximum safe clock frequency must be derated per the AVR frequency-voltage curve in the manufacturer datasheet. This page synthesizes distributor pricing, drop-in alternatives, a full 40-pin pinout, and practical design notes not found together on the manufacturer product page.

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ATMEGA8515L-8PU - 8-Bit AVR MCU 8MHz 8KB Flash | Microchip
ATMEGA8515L-8PU

ATMEGA8515L-8PU - 8-Bit AVR MCU 8MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8515L-8PU is an 8-bit AVR RISC microcontroller with 8KB (4K x 16) In-System Programmable Flash memory, 512B SRAM, 512B EEPROM, and an 8MHz maximum clock speed, housed in a 40-pin PDIP through-hole package. It operates from a 2.7V to 5.5V supply and delivers up to 8 MIPS throughput at 8MHz. A microcontroller unit (MCU) is a single-chip embedded computer that integrates a processor core, program memory, data memory, and peripherals on one die. The ATmega8515L belongs to the AVR family of 8-bit RISC microcontrollers, which sit within the broader embedded processor hierarchy alongside 8051, PIC, and ARM Cortex-M families. Key features include the AVR advanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle; 32 general-purpose working registers; 35 programmable I/O lines; an external bus interface (EBI/EMI) supporting up to 64KB of external SRAM; and SPI and UART/USART serial interfaces. These make the part well suited for designs that need memory expansion through a parallel address/data bus. The architecture combines Harvard-structure pipelining with a single-cycle ALU, so the effective throughput per megahertz is roughly ten times higher than a conventional CISC MCU. Three timers/counters (two 8-bit and one 16-bit with PWM), an on-chip analog comparator, and programmable serial USART round out the peripheral set. In-System Programming (ISP) via the SPI port allows firmware updates on assembled boards. Typical applications include industrial control panels, legacy 8051-style bus expansions, motor control, instrumentation front ends, and through-hole prototyping or education platforms where the 40-pin DIP package simplifies socketing and rework. Design consideration: the "L" version is limited to 0-8MHz; if you need the full 16MHz speed grade of the ATmega8515 family, the 4.5V-5.5V-only ATMEGA8515-16PU is required instead. This page synthesizes distributor pricing, drop-in alternatives, pin-level design notes, and procurement data not found in the manufacturer datasheet.

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ATMEGA8535-16AC - 8KB AVR MCU 16MHz 44-TQFP | Microchip
ATMEGA8535-16AC

ATMEGA8535-16AC - 8KB AVR MCU 16MHz 44-TQFP | Microchip

The Microchip Technology ATMEGA8535-16AC is a low-power 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash memory (organized as 4K x 16), 512 bytes of SRAM, 512 bytes of EEPROM, and an 8-channel 10-bit ADC, executing up to 16 MIPS at its maximum 16 MHz clock frequency in a 44-pin TQFP (10 x 10 mm) surface-mount package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters on one die. Within the semiconductor hierarchy, the ATmega8535 belongs to the AVR enhanced RISC MCU family, which sits under the broader categories of embedded processors and integrated circuits. Its single-cycle instruction execution makes it a classic choice for compact embedded control systems. Key features include the advanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle; 32 general-purpose working registers; and fully static operation up to 16 MHz. Three flexible Timer/Counters with compare modes, a programmable serial USART, and a byte-oriented Two-wire Serial Interface (TWI, I2C-compatible) round out the peripheral set. An 8-channel 10-bit A/D converter allows direct connection of analog sensors without external conversion circuitry. Architecturally, the AVR core uses a Harvard structure with separate program and data buses, enabling Read-While-Write self-programming of the Flash and a deterministic one-instruction-per-cycle pipeline. The device also supports an AT90S8535 compatibility mode (via the S8535C fuse) for legacy designs, and is pin compatible with AT90S8535, allowing direct replacement on existing printed circuit boards. Typical applications include industrial control and instrumentation, sensor data acquisition using the 10-bit ADC, embedded communication nodes using the USART or TWI bus, and educational/hobby controller platforms. The -16AC speed grade operates from a 4.5V to 5.5V supply at 16 MHz. Design consideration: because the 16 MHz grade requires a 4.5V to 5.5V rail, verify supply tolerance and fuse-bit configuration (including the S8535C compatibility fuse) before migrating code from AT90S8535 designs. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8535-16AU - 8-bit AVR MCU 8KB Flash 16MHz 44-TQFP | Microchip
ATMEGA8535-16AU

ATMEGA8535-16AU - 8-bit AVR MCU 8KB Flash 16MHz 44-TQFP | Microchip

The Microchip Technology ATMEGA8535-16AU is an 8-bit AVR RISC microcontroller delivering 16 MIPS at 16 MHz with 8 KB of in-system programmable Flash, 512 B EEPROM, and 512 B SRAM in a 44-pin TQFP (10x10 mm) package operating from a 4.5 V to 5.5 V supply. The device integrates 32 general-purpose I/O lines, three flexible Timer/Counters with compare modes, a programmable USART, a byte-oriented Two-wire Serial Interface (TWI/I2C), and an 8-channel 10-bit successive-approximation ADC. An AVR microcontroller is a Harvard-architecture 8-bit RISC device that executes most instructions in a single clock cycle, sitting within the hierarchy of microcontroller -> embedded processor -> integrated circuit -> semiconductor. The ATmega family is Microchip's classic general-purpose AVR line, and the ATmega8535 is the Flash-based successor to the mask-ROM AT90S8535, retaining pin compatibility for legacy board reuse in industrial and educational designs. Key features include 8 KB ISP Flash with Read-While-Write support, 512 B EEPROM for non-volatile parameter storage, 512 B SRAM, 32 general-purpose working registers, internal and external interrupts, a programmable Watchdog Timer with on-chip oscillator, and a 6 sleep-mode power management block (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby). The 130-instruction RISC core achieves 16 MIPS throughput at 16 MHz, and the on-chip ISP interface allows in-system reprogramming without removing the device. The device uses a low-power CMOS process optimized for both active and sleep-mode operation. The 44-pin TQFP (10x10 mm, 0.80 mm pitch) surface-mount package provides 32 I/O pins plus dedicated power, ground, reset, crystal, and analog reference pins. Architecture-wise, the Harvard bus separates program and data memory for single-cycle instruction fetch, while the 10-bit ADC supports up to 8 single-ended channels with optional internal bandgap reference. Typical applications include industrial control panels, motor and relay control, sensor data acquisition, legacy AT90S8535 board migration, and educational embedded systems. The combination of 8 KB Flash, 512 B EEPROM, and a 10-bit ADC in one package reduces external component count for mixed-signal control designs. When designing with this device, decouple AVCC and VCC separately and place 100 nF bypass capacitors within a few millimeters of the pins; the ADC reference and analog supply pins are noise-sensitive. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8535-16JC - 8-bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16JC

ATMEGA8535-16JC - 8-bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8535-16JC is a low-power 8-bit AVR RISC microcontroller delivering up to 16 MIPS throughput at 16 MHz, with 8 KB self-programming In-System Programmable Flash, 544 bytes SRAM, and 512 bytes EEPROM, housed in a 44-pin PLCC (16.6 x 16.6 mm) package. A microcontroller unit (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals. The ATmega8535 belongs to the AVR 8-bit microcontroller family, itself a branch of the broader microcontroller and embedded processor hierarchy. AVR devices execute most of their 130 powerful instructions in a single clock cycle, giving high code density and fast deterministic execution for embedded control systems. Key features include an advanced RISC architecture with 32 general-purpose working registers, full static operation from DC to 16 MHz, and 8-channel 10-bit analog-to-digital conversion - parameters that make the device well suited to mixed analog-digital control tasks. It also provides three flexible Timer/Counters with compare modes, a programmable serial USART, and a byte-oriented Two-Wire Serial Interface (TWI/I2C-compatible) for board-level communication. Technically, the core uses a Harvard architecture with separate program and data buses, enabling Read-While-Write self-programming of the Flash. In-System Programming (ISP) permits firmware updates without removing the device from the PCB, while JTAG boundary-scan and on-chip debug support system integration. Internal and external interrupt sources support responsive real-time control. Typical applications include industrial automation controllers, instrumentation with analog sensor front-ends leveraging the 10-bit ADC, and communication nodes using the USART and TWI interfaces. Design consideration: the 16 MHz -16 speed grade operates at 4.5-5.5V; verify supply tolerance before choosing this grade over the 8 MHz low-voltage L variant. This page synthesizes distributor pricing, drop-in alternatives, design notes, and FAQ answers not found in the manufacturer datasheet alone. Pricing references are as of 2026-09-19.

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ATMEGA8535-16JJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16JJ

ATMEGA8535-16JJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8535-16JJ is an 8-bit AVR RISC microcontroller delivering 16 MIPS throughput at 16 MHz, with 8 KB In-System Programmable Flash, 512 bytes EEPROM, 512 bytes SRAM, and an 8-channel 10-bit ADC, housed in a 44-pin PLCC (16.6 x 16.6 mm) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest tier of the embedded computing hierarchy (MCU -> embedded processor -> system-on-chip). The AVR family uses a modified Harvard architecture with a mostly single-cycle instruction set, which is why an 8-bit AVR core can achieve 1 MIPS per MHz of clock frequency, classifying the ATmega8535 within the broader categories of 8-bit microcontroller and embedded processor IC. Key features include 8 KB of self-programmable Flash with Read-While-Write support, 32 general purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare modes, a programmable serial USART, a byte-oriented Two-wire Serial Interface (TWI/I2C), and an 8-channel 10-bit ADC. The 16 MHz speed grade requires a 4.5 V to 5.5 V supply, making this part suitable for 5 V industrial logic environments. Architecturally, the AVR core executes most instructions in a single clock cycle through its pipelined fetch/execute scheme, while separate Flash, SRAM, and EEPROM memories allow program and data to be accessed concurrently. In-system programming via the SPI port enables field firmware updates without removing the device from the board. Typical applications include industrial control panels, sensor acquisition nodes using the 8-channel ADC, motor control with timer PWM outputs, and legacy 5 V equipment maintenance where PLCC sockets allow easy replacement. When designing with the ATMEGA8535-16JJ, verify the 5 V supply rail and observe ADC reference and clock source trade-offs - higher clock speeds increase ADC noise, so consider prescaling the ADC clock. This page synthesizes distributor availability, drop-in alternatives, and practical design guidance not consolidated in the manufacturer datasheet.

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ATMEGA8535-16JU - 8-bit AVR MCU 16MHz 8KB Flash 44-PLCC | Microchip
ATMEGA8535-16JU

ATMEGA8535-16JU - 8-bit AVR MCU 16MHz 8KB Flash 44-PLCC | Microchip

The Microchip Technology ATMEGA8535-16JU is an 8-bit AVR ATmega RISC microcontroller with 8 KB (4K x 16) In-System Programmable Flash, 512 B SRAM, 512 B EEPROM, and an 8-channel 10-bit ADC, executing at up to 16 MIPS from a 16 MHz clock and housed in a 44-pin PLCC (16.6 x 16.6 mm, J-lead) package. A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripheral functions such as timers, serial interfaces, and analog-to-digital converters. The ATMEGA8535 belongs to the AVR ATmega family, which sits within the broader hierarchy of 8-bit microcontrollers under the embedded processors category. AVR cores use a Harvard architecture with most instructions executing in a single clock cycle, distinguishing them from multi-cycle 8051-class MCUs. Key features include the Advanced RISC architecture with 130 powerful instructions, 32 general-purpose 8-bit working registers, In-System Programming (ISP), and a supply voltage range of 4.5 V to 5.5 V for the 16 MHz speed grade. Peripheral set comprises three timers (two 8-bit, one 16-bit with PWM), an 8-channel 10-bit ADC, USART, SPI, TWI (I2C-compatible) serial interfaces, and an on-chip analog comparator. Architecturally, the AVR pipeline fetches one instruction while executing another, achieving one MIPS per MHz of clock. Single-cycle ALU operation through the 32-register file eliminates the accumulator bottleneck of traditional 8-bit cores, improving code density and real-time determinism. Typical applications include industrial motor control, HVAC and building automation, battery chargers, and instrumentation front ends that exploit the 8-channel 10-bit ADC. Design consideration: the 16 MHz speed grade requires a 4.5 V to 5.5 V supply; a 3.3 V design must select the ATmega8535L-8 speed grade instead. This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not consolidated in the manufacturer datasheet.

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ATMEGA8535-16JUR - 8KB Flash 16MHz AVR MCU 44-PLCC | Microchip
ATMEGA8535-16JUR

ATMEGA8535-16JUR - 8KB Flash 16MHz AVR MCU 44-PLCC | Microchip

The Microchip Technology ATMEGA8535-16JUR is an 8-bit AVR RISC microcontroller with 8KB (4K x 16) Flash program memory, 16MHz maximum clock speed delivering 16 MIPS throughput, and a 4.5V to 5.5V supply range, housed in a 44-pin PLCC (16.6 x 16.6 mm) package. It integrates 544B SRAM, 512B EEPROM, an 8-channel 10-bit ADC, and 32 general-purpose I/O lines. An 8-bit microcontroller (MCU) is a self-contained computing device that integrates a processor core, program memory, data memory, and peripherals on a single silicon die. Within the embedded-systems hierarchy, the ATMEGA8535 belongs to the AVR ATmega family of flash-based MCUs, which sit under the broader categories of microcontrollers, embedded processors, and semiconductor integrated circuits. AVRs are known for their advanced RISC architecture with mostly single-cycle instruction execution. Key features include the advanced RISC architecture with 130 powerful instructions, most executed in a single clock cycle; 32 x 8-bit general-purpose working registers; 8-channel 10-bit ADC; full-duplex UART; SPI serial interface; and multiple PWM channels. These peripherals make the device well suited to analog sensing and motor-adjacent control tasks without external components. Technically, the ATmega8535 uses the AVR Harvard architecture with separate program and data buses, enabling single-cycle fetch of most instructions. The 16MHz speed grade (-16 suffix) permits 16 MIPS peak throughput at 5V operation. In-system programmable (ISP) Flash allows field firmware updates via the SPI interface, and the on-chip EEPROM retains calibration data through power cycles. Typical applications include industrial control boards, 5V legacy equipment maintenance, data-acquisition front ends using the 8-channel ADC, and educational or hobby embedded platforms. The 5V-only supply range aligns with industrial 5V logic rails, and the PLCC package supports J-lead socketed designs for easy field replacement. A key design consideration is power dissipation: at 16MHz and 5V the device consumes more current than lower speed grades, so active-mode current budgeting and proper VCC/GND decoupling (100nF ceramic per supply pin pair) are recommended. Because the PLCC footprint differs from TQFP, footprint changes are required when migrating to TQFP variants such as ATMEGA8535-16AU. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet, giving engineers and buyers a single verified reference for the ATMEGA8535-16JUR.

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ATMEGA8535-16MI - 8-bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16MI

ATMEGA8535-16MI - 8-bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip (Atmel) ATMEGA8535-16MI is an 8-bit AVR RISC microcontroller with 8KB of In-System Programmable Flash, 512B SRAM, 512B EEPROM, and an 8-channel 10-bit ADC, delivering up to 16 MIPS throughput at 16 MHz in a 44-pin VQFN (7x7 mm) surface-mount package. A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, ADCs, and communication interfaces. Within the semiconductor hierarchy, the ATmega8535 belongs to the AVR ATmega family of 8-bit microcontrollers, positioned under the broader categories of embedded processors and integrated circuits. AVRs use a Harvard architecture with most single-cycle instructions. Key features include an advanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle; 32 x 8 general-purpose working registers; fully static operation up to 16 MHz; and self-programming Flash supporting boot-code operation. The 8-channel 10-bit ADC enables direct analog sensor interfacing, while three hardware timers/PWM channels support motor control and precision timing tasks. Architecturally, the ATmega8535 combines the AVR enhanced RISC core with separate program and data buses, allowing one instruction fetch and execution per clock. Operating voltage is 4.5V to 5.5V, with an industrial temperature range of -40C to +85C for the MI (VQFN) grade. Typical applications include industrial automation, consumer electronics, sensor acquisition systems, motor control, and embedded control nodes where an ADC-rich, 5V-tolerant MCU is required. Design consideration: budget Flash and SRAM carefully - 8KB Flash and 512B SRAM suit compact C or assembly firmware but not large RTOS-based designs; consider ATmega64/128 for larger code. This page synthesizes distributor pricing context, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8535-16MJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16MJ

ATMEGA8535-16MJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8535-16MJ is an 8-bit AVR RISC microcontroller featuring an AVR core operating at 16 MHz with 8 KB of In-System Programmable Flash program memory (4K x 16), 512 bytes of SRAM, and 512 bytes of EEPROM, housed in a 44-pin VQFN (7x7 mm) package with exposed pad. An 8-bit AVR microcontroller is a member of the Harvard-architecture RISC family in which program memory and data memory occupy separate address spaces, allowing most instructions to execute in a single clock cycle. Within the system hierarchy, the ATmega8535 sits below the ATmega64/128 family as a mid-range microcontroller IC, integrating a CPU, non-volatile memory, SRAM, timers, serial interfaces, and an ADC on one chip, eliminating the need for discrete peripheral ICs in cost- and space-sensitive embedded designs. Key features include a 130-instruction Advanced RISC architecture with most single-cycle execution and 32 general purpose working registers, delivering up to 16 MIPS throughput at 16 MHz. Three flexible Timer/Counters with compare modes support PWM generation and event timing. Communication is covered by a serial programmable USART, a byte-oriented Two-Wire Serial Interface (TWI/I2C), and a Serial Peripheral Interface (SPI), enabling multi-drop and high-speed links. The 8-channel 10-bit A/D converter directly digitizes analog sensor inputs such as temperature, pressure, and voltage feedback without an external ADC. In-System Programmable Flash with Read-While-Write capability allows field firmware updates over UART or SPI. The 44-VQFN 7x7 mm package with exposed pad offers a compact, thermally efficient surface-mount footprint for dense industrial PCBs. Typical applications include industrial control and automation, data acquisition systems, HVAC and building control, battery management, and low-cost instrumentation where an 8-channel ADC plus USART/TWI connectivity at 5V is required. When designing with this device, remember that the -16 speed grade is specified for a 5V supply; plan decoupling on VCC/AVCC and route the ADC ground return carefully for full 10-bit accuracy. This page synthesizes verified distributor data, drop-in family alternatives, pin-level guidance, and pricing context not consolidated in the manufacturer datasheet alone.

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ATMEGA8535-16MU - 8KB AVR MCU 16MHz 44-VQFN | Microchip
ATMEGA8535-16MU

ATMEGA8535-16MU - 8KB AVR MCU 16MHz 44-VQFN | Microchip

The Microchip Technology ATMEGA8535-16MU is an 8-bit AVR RISC microcontroller with 8 KB In-System Programmable Flash, 512 bytes SRAM, 512 bytes EEPROM, and an 8-channel 10-bit ADC, executing at up to 16 MIPS from a 16 MHz clock in a 44-pin VQFN (7x7 mm, 0.8 mm pitch) surface-mount package. An 8-bit AVR microcontroller is a single-chip computer that integrates a RISC processor core, program Flash, data SRAM, EEPROM, and peripherals such as timers, USART, and ADC on one die. Within the semiconductor hierarchy it sits under microcontroller unit (MCU) -> embedded processor -> integrated circuit, and it belongs to the AVR ATmega family of flash-based MCUs used across embedded and industrial control systems. Key features include the advanced AVR RISC architecture with 130 powerful instructions, most executing in a single clock cycle, which yields the 1 MIPS/MHz throughput rating. The 8 KB Flash supports In-System Programming with Read-While-Write capability, enabling field firmware updates. Peripheral set covers three flexible Timer/Counters with compare modes, a programmable USART, a byte-oriented Two-wire Serial Interface (I2C-compatible TWI), and the 8-channel 10-bit A/D converter. Technically, the -16 speed grade operates from a 4.5 V to 5.5 V supply, with 32 general purpose I/O lines and 32 general purpose working registers all directly connected to the ALU, allowing single-cycle access that eliminates arithmetic bottlenecks typical of accumulator-based 8-bit architectures. Internal and external interrupt sources support responsive real-time control. Typical applications include industrial automation and motor control nodes, sensor acquisition systems leveraging the 8-channel 10-bit ADC, and legacy embedded products requiring AVR ATmega8535 compatibility. Its 5 V operation suits noisy industrial environments where 3.3 V parts are less robust. Design consideration: respect the 4.5-5.5 V operating window; the part is not rated for 3.3 V at the 16 MHz speed grade, so lower-voltage designs should select an L-suffix variant instead. This page synthesizes verified distributor data, drop-in alternatives, and practical design notes beyond the manufacturer datasheet.

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ATMEGA8535-16PC - 8-bit AVR MCU 8KB 16MHz 40-DIP | Microchip
ATMEGA8535-16PC

ATMEGA8535-16PC - 8-bit AVR MCU 8KB 16MHz 40-DIP | Microchip

The Microchip Technology ATMEGA8535-16PC is a low-power 8-bit AVR RISC microcontroller with 8 KB In-System Programmable Flash, 512 B EEPROM, 512 B SRAM, and an 8-channel 10-bit ADC, delivered in a 40-pin PDIP package rated for 16 MHz operation and up to 16 MIPS throughput at 4.5 V to 5.5 V. An 8-bit microcontroller is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters. Within the power-management hierarchy of embedded systems, the MCU sits at the top as the system controller: it supervises power sequencing, sensor acquisition, and communication, making AVR-class MCUs a staple of industrial control, instrumentation, and education platforms. Key features of the ATMEGA8535-16PC include the AVR enhanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle; 32 general-purpose working registers fully connected to the ALU; and three flexible Timer/Counters with compare modes and PWM outputs. The 8-channel 10-bit ADC, a byte-oriented Two-wire Serial Interface (TWI/I2C), a programmable serial USART, and an SPI interface round out the peripheral set, enabling compact single-chip designs with both analog sensing and multi-protocol communication. Technically, the device is fully static, allowing operation down to DC clock rates for ultra-low-power designs, and includes internal and external interrupt sources, a programmable watchdog timer with an internal oscillator, and In-System Programming (ISP) via the SPI port for field updates without removing the chip. Idle, ADC Noise Reduction, Power-save, Power-down, and Standby sleep modes let designers trade responsiveness against current consumption. Typical applications include industrial automation controllers, motor control and PWM actuation, sensor-based instrumentation using the 10-bit ADC, and hobby or educational embedded platforms supported by the MightyCore Arduino hardware package. The through-hole 40-DIP package makes the part ideal for prototyping on breadboards and for legacy equipment service. A key design consideration is the 4.5 V to 5.5 V operating window: unlike its 2.7 V-capable ATmega8535L siblings, the -16PC speed grade requires a 5 V supply to reach 16 MHz, so level shifting is needed for 3.3 V peripherals. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet, giving engineers a complete selection resource.

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ATMEGA8535-16PI - 8-bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16PI

ATMEGA8535-16PI - 8-bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology (Atmel) ATMEGA8535-16PI is a low-power 8-bit AVR RISC microcontroller featuring 8KB of In-System Programmable Flash memory, 512 bytes of SRAM, 512 bytes of EEPROM, an 8-channel 10-bit ADC, and 32 general-purpose I/O lines, housed in a 40-pin PDIP package rated for 16 MHz operation and 4.5V to 5.5V supply. An 8-bit AVR microcontroller is a single-chip processor built on the AVR enhanced RISC architecture, in which most of its instructions execute in a single clock cycle. Within the embedded-systems hierarchy, it belongs to the microcontroller unit (MCU) category: CPU, program memory, data memory, timers, serial interfaces, and analog-to-digital conversion integrated onto one die, replacing multi-chip processor-plus-peripheral designs in cost- and size-sensitive control applications. Key differentiating specifications include up to 16 MIPS throughput at 16 MHz, 130 powerful instructions with mostly single-cycle execution, and 32 general-purpose working registers directly connected to the ALU. The device integrates three flexible timer/counters with compare modes, a programmable serial USART, a byte-oriented Two-wire Serial Interface (I2C-compatible TWI), and an SPI serial port, plus brown-out detection, power-on reset, PWM capability, and a watchdog timer. Architecturally, the ATmega8535 uses a Harvard-structure AVR core with single-level pipelined instruction fetch, while the Flash program memory supports Read-While-Write self-programming for field firmware updates. The internal 10-bit successive-approximation ADC with 8 multiplexed channels (PA0-PA7) plus an internal bandgap reference input makes external signal-conditioning ICs unnecessary for many sensor tasks. An AT90S8535 compatibility mode, selected by the S8535C fuse, eases migration from the earlier AVR generation. Typical applications include industrial control and automation panels, motorized motion platforms, HVAC and appliance controllers, and instrumentation front-ends that exploit the 8-channel 10-bit ADC. The 40-pin PDIP package also suits through-hole prototyping, educational boards, and repair of legacy equipment. Design consideration: the -16PI speed grade requires a 4.5V to 5.5V supply, so it cannot run at 3.3V; plan level shifting for mixed-voltage systems and decouple AVCC/AGND separately for accurate ADC results. This page synthesizes distributor pricing, drop-in alternative analysis, pinout data, and practical design notes not found in the manufacturer datasheet, with pricing referenced as of 2026-09-19.

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ATMEGA8535-16PJ - 8KB AVR MCU 16MHz 40-PDIP | Microchip
ATMEGA8535-16PJ

ATMEGA8535-16PJ - 8KB AVR MCU 16MHz 40-PDIP | Microchip

The Microchip Technology ATMEGA8535-16PJ is an 8-bit AVR RISC microcontroller with 8 KB self-programming Flash program memory, 544 bytes SRAM, 512 bytes EEPROM, and an 8-channel 10-bit ADC, delivering up to 16 MIPS throughput at 16 MHz in a 40-pin PDIP through-hole package. It operates from a 4.5 V to 5.5 V supply, matching the 16 MHz -16 speed grade. An AVR ATmega microcontroller is an 8-bit RISC-based MCU built on the Harvard architecture, in which program memory and data memory use separate buses so most instructions execute in a single clock cycle. Within the electronics hierarchy it sits under microcontroller -> embedded processor -> integrated circuit, and it belongs to the wider family of AVR flash MCUs that Microchip inherited from Atmel. These MCUs are favored for their simple toolchain, in-system programmability, and strong single-cycle I/O control. Key features include 130 powerful instructions with mostly single-cycle execution, 32 general-purpose I/O lines organized in four 8-bit ports (PORTA through PORTD), and the 8-channel 10-bit successive-approximation ADC on PORTA for direct analog sensor connection. Communication is handled by an SPI interface and a full UART/USART, enabling connectivity to displays, memories, and other MCUs. Internal and external interrupt sources, a 16-bit Timer/Counter1 with PWM outputs, two 8-bit timers, and an on-chip brown-out detector round out the peripheral set. Technically, the fully static design allows the clock to be stopped and restarted without loss of state, and self-programming Flash supports field firmware updates through boot-loader code. Power management modes, including idle and power-down, let battery-sensitive designs average down the 5 V rail consumption. The 40-pin PDIP package has 0.1 inch pin pitch, which suits sockets, breadboards, and hand or wave soldering in repairable industrial equipment. Typical applications include legacy industrial control boards, motor and actuator control with PWM, instrumentation and data loggers using the 10-bit ADC, and educational or hobby systems where DIP packaging allows easy replacement and rework. It is also a direct fit for maintaining equipment originally designed around the Atmel AT90S8535. When designing with the ATMEGA8535-16PJ, remember the 4.5 V to 5.5 V operating window: it cannot run at 3.3 V. Decouple VCC and AVCC separately and keep analog traces away from the USART lines to preserve ADC accuracy. This page synthesizes verified distributor specifications, drop-in replacement options, pinout data, and practical design notes not consolidated in the manufacturer datasheet.

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ATMEGA8535-16PU - 8-bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8535-16PU

ATMEGA8535-16PU - 8-bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8535-16PU is a high-performance, low-power 8-bit AVR RISC microcontroller with 16 MHz maximum clock frequency, 8 KB In-System Programmable Flash memory, and an 8-channel 10-bit ADC, housed in a 40-pin PDIP (0.600 inch, 15.24 mm) through-hole package. It operates from 4.5 V to 5.5 V and delivers up to 16 MIPS throughput at 16 MHz. A microcontroller unit (MCU) is a complete computing system on a single chip, combining a processor core, program memory, data memory, and peripherals. The ATmega8535 belongs to the AVR 8-bit MCU family (MCU -> 8-bit MCU -> AVR ATmega -> Microchip AVR), which uses an advanced RISC architecture with 130 powerful instructions, most of which execute in a single clock cycle, plus 32 general-purpose working registers directly connected to the ALU. Key features include 8 KB self-programmable Flash with read-while-write support, 512 B EEPROM for non-volatile data storage, 512 B SRAM, and 32 general-purpose I/O lines. Peripheral integration is strong for its class: a serial programmable USART, SPI serial interface, three flexible Timer/Counters with compare and PWM modes, an 8-channel 10-bit ADC, programmable Watchdog Timer with on-chip oscillator, and an internal analog comparator. Technically, the AVR Harvard architecture separates program and data buses, allowing simultaneous instruction fetch and execution. In-System Programming (ISP) via the SPI port and In-Application self-programming via the boot section eliminate dedicated programming cycles in production and allow firmware field updates. The ATmega8535 is also pin compatible with AT90S8535 and ATmega8515, easing migration on existing PCBs. Typical applications include industrial automation and control, embedded systems, consumer electronics, motor control using PWM timer outputs, and sensor acquisition systems leveraging the 10-bit ADC. A key design consideration: the 16 MHz rating applies only at 4.5 V to 5.5 V; at lower voltages the maximum safe frequency drops, so match supply rails and fuses carefully. This page synthesizes distributor pricing, drop-in alternatives, practical design notes, and pinout data not consolidated in the manufacturer datasheet.

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ATMEGA8535L-8AC - 8MHz AVR MCU, 8KB Flash, TQFP-44 | Microchip
ATMEGA8535L-8AC

ATMEGA8535L-8AC - 8MHz AVR MCU, 8KB Flash, TQFP-44 | Microchip

The Microchip Technology (Atmel) ATMEGA8535L-8AC is a low-power 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 512 bytes of SRAM, 512 bytes of EEPROM, and an 8-channel 10-bit ADC, running at up to 8 MHz in a 44-lead TQFP (10x10 mm) package. An AVR ATmega microcontroller is a member of the 8-bit microcontroller (MCU) family built on the AVR enhanced RISC architecture, which sits within the broader hierarchy of embedded processors used for sensing, control, and human-interface functions. AVR cores execute most of their 130 instructions in a single clock cycle, giving high code efficiency and deterministic timing for real-time embedded control. Key features include 32 general purpose I/O lines, three flexible Timer/Counters with compare modes, a programmable serial USART, a byte-oriented Two-Wire Interface (TWI/I2C), and an SPI serial port. The L suffix denotes the wide 2.7 V to 5.5 V operating voltage range, allowing the same design to run from 3.3 V or 5 V rails at 0 to 8 MHz. Architecturally, the device pairs the AVR RISC core with separate program and data buses (Harvard architecture), 32 general purpose working registers, and Read-While-Write self-programming Flash. Six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) cut quiescent draw dramatically in battery applications, and the 8-channel 10-bit ADC with internal reference supports direct analog sensor interfacing. Typical applications include industrial control panels, sensor acquisition nodes using the ADC plus TWI/SPI peripherals, and motor or relay control systems where the three timers generate PWM outputs. When designing, budget SRAM carefully - 512 bytes fills quickly with large buffers or deep call stacks - and validate brown-out/fuse settings for reliable 5 V operation. This page synthesizes distributor pricing context, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8535L-8AJ - 8KB AVR MCU, 8MHz, TQFP-44 | Microchip
ATMEGA8535L-8AJ

ATMEGA8535L-8AJ - 8KB AVR MCU, 8MHz, TQFP-44 | Microchip

The Microchip Technology ATMEGA8535L-8AJ is an 8-bit AVR RISC microcontroller with 8KB in-system programmable Flash, 512 bytes SRAM, 512 bytes EEPROM, and an 8-channel 10-bit ADC, running at up to 8MHz in a 44-pin TQFP package. The L suffix denotes low-voltage operation from 2.7V to 5.5V, and the AJ suffix denotes the industrial -40C to +85C temperature grade in the TQFP package. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. In the embedded-systems hierarchy, an MCU sits above discrete logic and below application processors, providing self-contained control for sensors, actuators, and human-machine interfaces. Key features of the ATMEGA8535L include the AVR advanced RISC architecture with 130 powerful instructions, most executing in a single clock cycle, and 32 general-purpose working registers. The core delivers up to 16 MIPS throughput at 16MHz, so at the 8MHz limit of this L-grade part it still reaches roughly 8 MIPS. Communication peripherals include a byte-oriented Two-wire Serial Interface (I2C/TWI), an SPI interface, and a programmable USART (UART), covering virtually all common embedded buses. The peripheral set comprises three flexible Timer/Counters with compare and PWM modes, internal and external interrupt sources, a watchdog timer, and the 8-channel 10-bit analog-to-digital converter with internal reference options, plus 32 general-purpose I/O lines. In-System Self-Programming of the Flash with Read-While-Write support enables field firmware updates without a socketed device. Typical applications include industrial control panels, battery-powered instruments (leveraging the 2.7V low-voltage operation and low-power idle/power-down modes), sensor data acquisition front ends using the 8-channel ADC, and motor control or lighting systems using the PWM timer outputs. Design consideration: the 8MHz clock ceiling of this L-grade device is the trade-off for 2.7V operation; if your design runs at 5V and needs 16MHz, choose the ATMEGA8535-16A variants instead. This page synthesizes verified distributor inventory data, drop-in alternatives, and practical design guidance not found in a single manufacturer datasheet.

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ATMEGA8535L-8AU - 8-bit AVR MCU 8KB Flash 44-TQFP | Microchip
ATMEGA8535L-8AU

ATMEGA8535L-8AU - 8-bit AVR MCU 8KB Flash 44-TQFP | Microchip

The Microchip Technology ATMEGA8535L-8AU is a low-power 8-bit AVR RISC microcontroller with 8 KB of in-system programmable Flash, 512 B SRAM, 512 B EEPROM, and an 8-channel 10-bit ADC, supplied in a 44-lead TQFP (10x10 mm) package and rated for 0-8 MHz operation at 2.7-5.5 V. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and peripherals such as timers, serial interfaces, and analog-to-digital converters. Within the semiconductor taxonomy, the ATMEGA8535L-8AU sits in the hierarchy of 8-bit MCU -> microcontroller -> embedded processor -> integrated circuit, and it belongs to the AVR ATmega family, which is known for its single-cycle RISC execution and deterministic interrupt latency. Key features include 8 KB Flash (4K x 16), 512 B SRAM, 512 B EEPROM, 32 programmable I/O lines, two 8-bit and one 16-bit timer/counter, a 4-channel PWM unit, an 8-channel 10-bit ADC, a programmable USART, a master/slave SPI, and a byte-oriented two-wire serial interface (I2C). The device delivers up to 8 MIPS at 8 MHz and supports six sleep modes for low-power operation. The ATmega8535L core uses the enhanced AVR RISC architecture with 130 powerful instructions, most executing in a single clock cycle. The 'L' suffix denotes the low-voltage version, which operates from 2.7 V to 5.5 V and is speed-graded to 8 MHz, while the standard ATmega8535 runs at 4.5-5.5 V and up to 16 MHz. This makes the L-grade part attractive for battery-powered and 3.3 V mixed-supply designs. Typical applications include industrial control panels, battery chargers, motor control, home appliances, sensor interfaces, and legacy 8-bit embedded designs that require a proven, well-documented AVR core with generous I/O count. The 44-TQFP package offers a compact 10x10 mm footprint suitable for space-constrained boards. When designing with this device, ensure the supply is decoupled with a 100 nF ceramic capacitor close to each VCC pin, and note that the internal RC oscillator is factory-calibrated to +/-3% at 8 MHz, which may be adequate for many applications without an external crystal. The ATmega8535L is a mature, active-lifecycle part with extensive third-party toolchain support. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for selection, replacement, and layout decisions.

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ATMEGA8535L-8JI - 8KB Flash AVR MCU 44-PLCC | Microchip
ATMEGA8535L-8JI

ATMEGA8535L-8JI - 8KB Flash AVR MCU 44-PLCC | Microchip

The Microchip (Atmel) ATMEGA8535L-8JI is an 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 512 B SRAM, 512 B EEPROM, and an 8-channel 10-bit ADC, rated for 8 MHz operation in a 44-pin PLCC (16.6 x 16.6 mm) package for the industrial temperature range of -40C to +85C. An AVR microcontroller is a family of 8-bit reduced-instruction-set (RISC) MCUs in the broader hierarchy of microcontroller -> embedded processor -> integrated circuit. AVR cores execute most instructions in a single clock cycle, and the ATmega8535 achieves up to 16 MIPS throughput at 16 MHz across the family, making it a classic choice for deterministic, low-power embedded control. Key features of the ATMEGA8535L-8JI include the advanced RISC architecture with 130 powerful instructions and 32 general-purpose working registers, fully static operation, In-System Programmable (ISP) Flash for field firmware updates, and the L suffix indicating a wide 2.7V to 5.5V supply range. The J suffix denotes the 44-lead PLCC package, and the I suffix grades the device for -40C to +85C industrial environments. Technically, the Harvard architecture separates program and data buses, allowing the single-cycle instruction fetch that gives AVR its high code efficiency. On-chip peripherals such as the 8-channel 10-bit ADC, timers/counters, UART, and SPI reduce external component count. The 8 MHz rating of the L-speed grade balances performance with the low-voltage operating window. Typical applications include industrial control panels, sensor data acquisition nodes using the 8-channel ADC, motor control and appliance boards, and legacy AVR system maintenance where the PLCC-44 socketed footprint must be preserved. A key design consideration: the L grade runs up to 8 MHz across the full 2.7V to 5.5V range; if your board runs at 5V and needs 16 MHz, choose the ATMEGA8535-16JI speed grade instead. This page synthesizes distributor availability, drop-in same-package alternatives, and practical design guidance not consolidated in the manufacturer datasheet.

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ATMEGA8535L-8JJ - 8KB AVR MCU, 8MHz, 44-PLCC | Microchip
ATMEGA8535L-8JJ

ATMEGA8535L-8JJ - 8KB AVR MCU, 8MHz, 44-PLCC | Microchip

The Microchip Technology ATMEGA8535L-8JJ is an 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash memory, 512 bytes of SRAM, 512 bytes of EEPROM, and an 8-channel 10-bit ADC, rated for 8 MHz operation (ATmega8535L low-voltage grade) in a 44-pin PLCC (J) surface-mount package. An AVR microcontroller is a family of 8-bit Harvard-architecture MCUs from Microchip (originally Atmel) that executes most instructions in a single clock cycle. Within the product hierarchy, the ATmega8535 sits at: microcontroller -> 8-bit MCU -> AVR ATmega family. Because program memory and data memory are separate buses, the AVR can achieve up to 16 MIPS throughput at 16 MHz, delivering performance typically requiring larger clock speeds in CISC architectures. Key features include 130 powerful RISC instructions (most single-cycle), 32 general-purpose working registers, 32 programmable I/O lines, and three flexible Timer/Counters with compare modes. The device also integrates a byte-oriented Two-wire Serial Interface (TWI, I2C-compatible), a serial programmable USART, an SPI interface, and internal/external interrupt sources. The 10-bit ADC resolves 8 single-ended channels, suitable for sensor interfaces in cost-sensitive designs. The L suffix denotes the low-voltage product grade, operating from 2.7V to 5.5V with a maximum clock of 8 MHz, versus the 16 MHz standard grade. Self-programming Flash with Read-While-Write support enables field firmware updates without external programmers, while ISP via SPI simplifies production programming. Typical applications include industrial control boards, sensor data acquisition systems, motor control auxiliaries, and legacy embedded systems where the 44-PLCC footprint must be maintained for socketed or board-level compatibility. Designers should note the 8 MHz limit of the L-grade part: designs requiring 16 MHz throughput must use the standard-grade ATmega8535 variant instead. This page synthesizes verified distributor pricing, drop-in alternatives, pinout details, and practical design notes beyond what the manufacturer datasheet provides.

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ATMEGA8535L-8JU - AVR 8-bit MCU 8KB Flash 8MHz 44-PLCC | Microchip
ATMEGA8535L-8JU

ATMEGA8535L-8JU - AVR 8-bit MCU 8KB Flash 8MHz 44-PLCC | Microchip

The Microchip Technology ATMEGA8535L-8JU is a low-power 8-bit AVR RISC microcontroller with 8KB Flash, 512B SRAM, 512B EEPROM and an 8-channel 10-bit ADC, rated 0-8 MHz at 4.5-5.5V, housed in a 44-lead PLCC (J-lead, 16.6x16.6 mm) package for industrial temperature ranges. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die. The ATmega8535 belongs to the AVR ATmega family, which sits within the broader microcontroller hierarchy: MCU -> embedded processor -> integrated circuit -> semiconductor. AVR's Harvard architecture with 130 mostly single-cycle instructions delivers up to 16 MIPS at 16 MHz, giving roughly 1 MIPS per MHz efficiency. Key features include 8KB (4K x 16) self-programmable Flash, 512 bytes of in-system EEPROM, an 8-channel 10-bit successive-approximation ADC, 32 programmable I/O lines, two 8-bit and one 16-bit timers with PWM, a programmable serial USART, and an on-chip analog comparator. The 'L' speed grade and GREEN designation support low-power, lead-free designs. Technically, the AVR enhanced RISC core executes most instructions in one clock cycle through a two-stage pipeline, while 32 general-purpose registers are directly connected to the ALU. Six sleep modes (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, Extended Standby) let designers cut quiescent draw in battery-powered systems. Typical applications include industrial control panels, ADC-based sensor acquisition nodes, motor and lighting control boards, and legacy PLCC-footprint AVR designs needing a second source. The 44-PLCC package suits socketed production and prototype environments. Design consideration: the 'L' grade limits clocking to 8 MHz; above that, choose ATMEGA8535-16Jx variants. Ensure 4.5-5.5V supply since this is not the 2.7V-capable low-voltage option across all conditions. This page synthesizes distributor pricing, drop-in alternatives, pin guidance, and practical design notes not consolidated in the manufacturer datasheet.

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ATMEGA8535L-8JUR - 8-Bit AVR MCU 8MHz 8KB Flash 44-PLCC | Microchip
ATMEGA8535L-8JUR

ATMEGA8535L-8JUR - 8-Bit AVR MCU 8MHz 8KB Flash 44-PLCC | Microchip

The Microchip Technology ATMEGA8535L-8JUR is an 8-bit AVR ATmega RISC microcontroller operating at 8 MHz with 8 KB (4K x 16) of In-System Programmable Flash memory, 512 bytes SRAM, 512 bytes EEPROM, and an 8-channel 10-bit ADC, housed in a 44-pin PLCC (16.6 x 16.6 mm) surface-mount package rated for industrial temperature ranges. An AVR microcontroller is a modified-Harvard-architecture, 8-bit reduced instruction set computer (RISC) device in the broader hierarchy of microcontrollers (MCU -> embedded processor -> integrated circuit). AVR cores execute most instructions in a single clock cycle through a two-stage pipeline, giving deterministic instruction timing that is prized in real-time embedded systems. The ATmega8535 sits in the mid-range ATmega family between the smaller ATmega8 and larger ATmega64 parts, offering the classic AVR peripheral set with an expanded analog section. Key features include up to 16 MIPS throughput at 16 MHz (8 MIPS at this part's 8 MHz ceiling for the L-grade), 130 powerful instructions most of which execute in a single cycle, 32 general-purpose working registers, and fully static operation. The 8-channel 10-bit analog-to-digital converter with internal bandgap reference supports direct sensor interfacing, while three flexible Timer/Counters with compare modes drive PWM and timing functions. Connectivity covers a serial programmable USART, a byte-oriented Two-Wire Serial Interface (TWI, compatible with I2C), and a Serial Peripheral Interface (SPI) that doubles as the In-System Programming (ISP) download path. In-System Programmable Flash with Read-While-Write capability allows firmware updates in the end product without removal. Low-power modes (Idle, Power-down, Power-save) extend battery life in portable designs. Typical applications include industrial control and automation nodes, motor control and HVAC systems, sensor data acquisition using the 8-channel ADC, and legacy AVR design maintenance where the PLCC-44 footprint must be preserved. The L suffix denotes a 2.7 V minimum supply enabling 3V-class battery-powered operation. Design consideration: the L-grade 8 MHz speed limit must be respected; run the ATMEGA8535-16 variants if a 16 MHz clock is required, and ensure decoupling on both VCC/AVCC pins plus a stable analog reference for ADC accuracy. This page synthesizes distributor availability, drop-in PLCC-44 alternatives, and practical design notes not found in a single manufacturer datasheet, with pricing as of 2026-09-19.

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