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ATMEGA8515-16JUR - 8KB AVR MCU 16MHz 44-PLCC | Microchip
ATMEGA8515-16JUR

ATMEGA8515-16JUR - 8KB AVR MCU 16MHz 44-PLCC | Microchip

The Microchip Technology ATMEGA8515-16JUR is an 8-bit AVR RISC microcontroller with 8KB of In-System Programmable Flash, 512B SRAM, 512B EEPROM, and a 16 MHz maximum clock delivering up to 16 MIPS throughput, housed in a 44-pin PLCC (16.6 x 16.6 mm) package rated for industrial temperatures. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one silicon die. Within the power-management and embedded-system hierarchy, the ATmega8515 belongs to the classic AVR ATmega family, positioned as an external-memory-capable member above compact parts like the ATmega8 and alongside the ATmega8535. Key differentiating features include an external memory interface supporting up to 64KB of external SRAM, 35 general-purpose I/O lines, 32 general-purpose working registers, and In-System Programmable Flash with Read-While-Write capability. The AVR advanced RISC architecture executes 130 powerful instructions, most in a single clock cycle, which yields the 1 MIPS/MHz efficiency that made the AVR family an industry standard. Technically, the ATmega8515 provides two flexible Timer/Counters with compare modes, internal and external interrupt sources, a programmable Serial USART, and a programmable Watchdog Timer with an internal oscillator. These peripherals allow deterministic interrupt-driven designs without external glue logic for many medium-complexity control tasks. Typical applications include industrial control boards that require external memory expansion, legacy design maintenance where the 44-PLCC through-hole-style solderable footprint is still preferred, and motor or process control systems using the USART for communication and timers for PWM generation. A key design consideration: this is a 4.5V to 5.5V industrial-grade part. Do not use it in 3.3V designs - the low-voltage ATmega8515L variant is required below 4.5V operation. This page synthesizes distributor availability, drop-in alternatives within the same PLCC-44 footprint, and practical design guidance not found in the manufacturer datasheet. Pricing shown is as of 2026-09-18.

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ATMEGA8515-16MC - 8-Bit AVR MCU 16MHz 8KB Flash 44-VQFN | Microchip
ATMEGA8515-16MC

ATMEGA8515-16MC - 8-Bit AVR MCU 16MHz 8KB Flash 44-VQFN | Microchip

The Microchip Technology ATMEGA8515-16MC is an 8-bit AVR RISC microcontroller operating at up to 16 MHz with 8 KB of In-System Programmable Flash, 512 bytes of internal SRAM, and 512 bytes of EEPROM, housed in a 44-pin VQFN (7x7 mm) surface-mount package. A microcontroller unit (MCU) integrates a processor core, program memory, data memory, and peripherals on a single chip, forming the lowest tier of embedded compute hierarchy: MCU -> embedded controller -> embedded system. The AVR family uses a modified Harvard architecture with 130 single-cycle RISC instructions and 32 general-purpose working registers, allowing most instructions to execute in one clock cycle. Key features of the ATMEGA8515-16MC include 16 MIPS throughput at 16 MHz, an external memory interface (EBI/EMI) supporting up to 64 KB of external SRAM, and serial connectivity through SPI, USART, and UART interfaces. The device offers 35 programmable I/O lines, two flexible Timer/Counters with compare modes and PWM generation, plus Brown-out Detect/Reset, Power-on Reset, and a programmable Watchdog Timer for robust operation. Technically, the self-programming Flash supports Read-While-Write operation, enabling field firmware updates. The fully static core tolerates clock rates down to DC, and the wide peripheral set - including an internal analog comparator input pair (AIN0/AIN1) and an SPI serial port for in-system programming - makes the part a complete single-chip or expanded-memory solution. The -16 speed grade requires a 4.5V to 5.5V supply, characteristic of the industrial 5V bus ecosystem. Typical applications include industrial automation controllers, motor control and power-conversion front ends, and legacy system upgrades where the external memory interface and 5V-tolerant I/O are mandatory. The 35 I/O lines suit keypad scanning, relay driving, and display interfacing. Design consideration: because the -16 grade has no low-voltage sibling in the same package at this speed, verify that your board truly runs at 5V; the L-8 variant runs at 2.7V-5.5V but only up to 8 MHz. This page synthesizes verified distributor listings, drop-in family alternatives, application guidance, and pricing context not consolidated in the manufacturer datasheet. Pricing references are as of 2026-09-18.

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ATMEGA8515-16MI - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8515-16MI

ATMEGA8515-16MI - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8515-16MI is a low-power, high-performance 8-bit AVR RISC microcontroller with 8 KB of self-programming In-System Programmable Flash, 512 bytes of SRAM (expandable up to 64 KB of external SRAM), 512 bytes of EEPROM, and 16 MIPS throughput at 16 MHz, housed in a 44-pin VQFN (7x7 mm, MLF) package with exposed pad. An 8-bit AVR microcontroller is a single-chip computer built on the AVR enhanced RISC architecture, in which most of its 130 powerful instructions execute in a single clock cycle. Within the product hierarchy, the ATmega8515 sits in the MCU (microcontroller unit) family: microcontroller -> 8-bit microcontroller -> AVR ATmega series -> ATmega8515. MCUs integrate CPU, memory, and peripherals on one die, replacing multi-chip logic solutions in embedded systems. Key features include 130 single-cycle instructions, 32 general-purpose working registers, fully static operation up to 16 MIPS at 16 MHz, and an external memory interface (EBI/EMI) supporting up to 64 Kbyte external SRAM - a distinguishing capability versus most ATmega parts of this generation. Communication peripherals include SPI and UART/USART interfaces, plus an 8-channel 10-bit ADC-equivalent analog front end is NOT present on this die; the 8515 instead trades ADC for the enhanced external bus. The AVR Harvard architecture accesses program and data memory through separate buses, allowing one instruction to execute while the next is fetched, achieving 1 MIPS per MHz efficiency. In-System Programming via SPI allows firmware updates on the assembled PCB, and the boot-section self-programming capability enables field firmware updates without a programmer socket. Typical applications include industrial control panels that exploit the 64 KB external SRAM expansion, communication bridges using the dual-purpose SPI/USART ports, and legacy AVR designs such as keyboard scanners, motor control front-ends, and instrumentation controllers. The -MI suffix specifies the industrial temperature range (-40C to +85C) VQFN package for space-constrained boards. When designing with this device, remember the maximum operating frequency depends on supply voltage: 16 MHz is specified for 4.5V to 5.5V operation. Decouple VCC and AVCC separately and keep the external memory bus traces short to preserve signal integrity at 16 MHz. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and design notes not found in the manufacturer datasheet. Pricing shown is as of 2026-09-18.

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ATMEGA8515-16MJ - 8KB Flash 16MHz AVR MCU | Microchip
ATMEGA8515-16MJ

ATMEGA8515-16MJ - 8KB Flash 16MHz AVR MCU | Microchip

The Microchip Technology ATMEGA8515-16MJ is an 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 512 bytes of SRAM, 512 bytes of EEPROM, and a 16 MHz maximum clock delivering up to 16 MIPS throughput, housed in a 44-pin VQFN (44-VFQFN) exposed-pad package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in the broader hierarchy of embedded MCUs: microcontroller -> embedded processor -> integrated circuit. The AVR family executes most instructions in a single clock cycle, and the ATmega8515 adds a key differentiator within the family: a full external memory interface supporting up to 64 KB of external SRAM, addressing applications whose code or data needs exceed on-chip resources. Key features include 35 general purpose I/O lines, 32 general purpose working registers, two flexible Timer/Counters with compare modes, internal and external interrupt sources, a programmable serial USART, and a programmable Watchdog Timer with on-chip oscillator. The 16 MJ suffix indicates the 4.5V to 5.5V operating voltage range, 16 MHz speed grade, and lead-free MLF/VQFN package with exposed pad for improved ground and thermal performance. Architecturally, the device combines Read-While-Write Flash programming with a rich peripheral set in a low-power CMOS process. In-system programmability allows firmware updates on the assembled PCB via SPI, reducing field-service cost. The external memory interface maps external SRAM into the data address space transparently. Typical applications include industrial control panels, motor-adjacent control logic, legacy AVR design maintenance, and communication subsystems that benefit from the USART plus abundant GPIO. Design consideration: at 16 MHz and 5V, observe the AVR maximum frequency versus VCC curve; below 4.5V the 16 MHz grade is not guaranteed. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515-16MU - 8KB AVR MCU 16MHz VQFN-44 | Microchip
ATMEGA8515-16MU

ATMEGA8515-16MU - 8KB AVR MCU 16MHz VQFN-44 | Microchip

The Microchip Technology ATMEGA8515-16MU is an 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash memory, 512 B of SRAM, 512 B of EEPROM, and 16 MHz maximum clock speed (16 MIPS throughput), housed in a 44-pad VQFN (MLF) 7x7 mm exposed-pad package. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor that executes most instructions in a single clock cycle. Within the power-management hierarchy, it functions as a complete embedded system-on-chip, combining CPU, program memory, data memory, timers, and serial peripherals in one IC. The ATmega8515 belongs to the classic ATmega AVR family, which sits above the smaller ATtiny line and below the high-memory ATmega64/128 devices. Key features include the Advanced RISC architecture with 130 powerful instructions, an 8 KB self-programmable ISP Flash supporting 10,000 write cycles, and a rich peripheral set: two 8-bit and one 16-bit timers with PWM, an 8-channel 10-bit ADC (in the ADC-equipped variant of the family peripheral map), USART, SPI, TWI (I2C-compatible), and up to 64 KB of external memory addressing. Technical depth comes from the AVR core: 32 general-purpose 8-bit registers directly connected to the ALU, allowing single-cycle access and efficient C compilation. Internal 8 MHz RC oscillator, brown-out detection, power-on reset, and idle/power-down/power-save sleep modes support low-power operation from a 4.5 V to 5.5 V supply. Typical applications include industrial control systems, motor control, LCD-equipped instrumentation, telecom peripherals, and legacy AVR designs maintained on 5 V rails where the external-memory expansion capability is required. Design consideration: because the maximum rating is 5.5 V, 3.3 V-only systems must select the ATmega8515L variants instead; also plan ISP programming headers early in layout. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515-16MUR - 8KB AVR MCU 16MHz 44-VQFN | Microchip
ATMEGA8515-16MUR

ATMEGA8515-16MUR - 8KB AVR MCU 16MHz 44-VQFN | Microchip

The Microchip Technology ATMEGA8515-16MUR is a high-performance, low-power 8-bit AVR RISC microcontroller with 8 KB self-programming In-System Programmable Flash memory, 512 B SRAM, 512 B EEPROM, and up to 16 MIPS throughput at 16 MHz, housed in a 44-pin VQFN (7x7 mm) exposed-pad package for industrial temperature operation. An 8-bit AVR microcontroller is a single-chip computer built on the AVR RISC architecture, in which most of its 130 powerful instructions execute in a single clock cycle. In the embedded-system hierarchy, a microcontroller integrates a CPU core (microprocessor), program memory (Flash), data memory (SRAM and EEPROM), and peripherals (timers, USART, watchdog) on one die, making it the core of countless industrial and consumer control applications. Key differentiating features include an external memory interface supporting up to 64 KB of external SRAM for memory-hungry applications, 35 general purpose I/O lines, two flexible Timer/Counters with compare modes, and a programmable serial USART. Self-programming Flash enables in-system field updates, while 32 general purpose working registers keep single-cycle arithmetic close to the ALU. Architecturally, the AVR Harvard design separates program and data buses, allowing simultaneous Flash instruction fetch and SRAM access. Fully static operation permits clocking down to DC for ultra-low power sleep modes, and an on-chip programmable watchdog timer with a separate on-chip oscillator safeguards reliability in unattended industrial installations. Internal and external interrupt sources provide deterministic event response. Typical applications include industrial control panels, motor-adjacent logic and relay sequencing, building automation nodes, legacy AVR design continuity, and communication bridges that exploit the USART plus external memory expansion for buffering. When designing with this part, budget the 512 B internal SRAM carefully; the external memory interface costs port pins, so map external RAM only when data structures genuinely exceed internal capacity. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design guidance not consolidated in the Microchip datasheet.

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ATMEGA8515-16PC - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8515-16PC

ATMEGA8515-16PC - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8515-16PC is a low-power 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 16 MHz maximum clock (16 MIPS throughput), and 512 bytes of internal SRAM expandable to 64 KB external SRAM, housed in a 40-pin PDIP package. The -16PC suffix denotes the 16 MHz speed grade in the commercial 0C to +70C temperature range with a 5V-tolerant 4.5V to 5.5V operating supply. An 8-bit microcontroller is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals on one die. Within the power-management hierarchy of embedded systems, an MCU such as the ATmega8515 executes control logic, timing, and communication tasks for electronic products, sitting above discrete logic ICs and below application processors. The AVR enhanced RISC architecture executes 130 powerful instructions, most in a single clock cycle, with 32 general-purpose working registers directly connected to the ALU. Key features include the fully static core allowing operation down to DC, an 8-channel 10-bit-capable external memory interface with up to 64 KB address space, and 512 bytes of on-chip EEPROM for non-volatile data storage. Communication peripherals comprise one UART, one SPI (also used for serial ISP programming), and one TWI (I2C-compatible) interface. Timer resources include one 16-bit timer with output compare and input capture plus one 8-bit timer, supporting PWM generation and event measurement. Programming is via SPI In-System Programming or conventional parallel programming. The AVR pipeline architecture fetches one instruction while executing another, achieving close to 1 MIPS per MHz of clock, so the 16 MHz -16PC grade delivers up to 16 MIPS. An on-chip SRAM of 544 bytes (including register file mapping) plus the external memory bus makes it well suited for legacy industrial control upgrades and memory-hungry LED matrix driving. Typical applications include industrial control panels, LED display and marquee controllers, keyboard-scanning systems, and hobbyist or educational embedded platforms; the MajorCore Arduino hardware package specifically supports the ATmega8515 for rapid prototyping. Design-wise, keep supply decoupling close to the VCC/GND pins (100 nF ceramic) and note that AVCC must be connected to VCC even when the analog comparator is unused. Observe reset pin (active-low) RC timing for reliable power-up. This page synthesizes verified distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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ATMEGA8515-16PI - 8KB Flash 16MHz AVR MCU 40-DIP | Microchip
ATMEGA8515-16PI

ATMEGA8515-16PI - 8KB Flash 16MHz AVR MCU 40-DIP | Microchip

The Microchip Technology ATMEGA8515-16PI is a low-power 8-bit AVR RISC microcontroller with 8 KB of self-programming In-System Programmable Flash, 544 bytes of internal SRAM plus support for up to 64 KB of external memory, 512 bytes of EEPROM, and 16 MIPS throughput at 16 MHz, housed in a 40-pin PDIP (0.600 in, 15.24 mm) package. An 8-bit microcontroller is an integrated circuit that executes program code, controls peripherals, and interfaces with sensors and actuators on a single chip. The AVR family uses an enhanced RISC architecture in which most of its 130 powerful instructions execute in a single clock cycle, sitting within the broader hierarchy of microcontrollers under embedded processors and power-management-adjacent system ICs. Key features include the fully static core operating from 4.5 V to 5.5 V, 32 general-purpose working registers, on-chip SRAM plus an external memory interface for address and data bus expansion, In-System Programming (ISP) of the Flash, and a peripheral set covering SPI, USART, timers, and analog comparator. These attributes make the part well suited to designs needing through-hole mounting and straightforward manual assembly or prototyping. Technically, the Harvard-architecture AVR core fetches instructions from Flash and data from SRAM simultaneously, sustaining one MIPS per MHz. The external memory interface latches the high address byte via port A/C, enabling 64 KB linear addressing for data logging or graphics buffers. The suffix -16PI denotes 16 MHz maximum clock, industrial temperature range, and PDIP package. Typical applications include industrial control panels, legacy equipment maintenance and repair, educational and hobbyist embedded systems, and test fixtures where DIP sockets allow easy firmware updates or chip swaps. When designing with this part, reserve port A for the external memory bus only if expansion is required, since those pins double as general-purpose I/O otherwise. Decouple VCC with 100 nF ceramics close to each supply pin and keep the reset line short for reliable ISP operation. This page synthesizes distributor pricing, drop-in alternatives from manufacturer migration application notes, and practical design guidance not found in the manufacturer datasheet.

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ATMEGA8515-16PJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip
ATMEGA8515-16PJ

ATMEGA8515-16PJ - 8-Bit AVR MCU 16MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8515-16PJ is an 8-bit AVR RISC microcontroller delivering 16 MIPS throughput at 16 MHz, with 8 KB (4K x 16) In-System Programmable Flash, 512 B SRAM, 512 B EEPROM, and up to 64 KB external memory interface support, housed in a 40-pin PDIP package. An 8-bit AVR microcontroller (MCU) is a single-chip integrated circuit that combines a RISC processor core, program memory (Flash), data memory (SRAM), non-volatile EEPROM, and peripherals such as timers, UART, SPI, and GPIO on one die. Within the semiconductor hierarchy, the ATmega8515 belongs to the ATmega family of AVR microcontrollers, which sit under the broader categories of microcontroller units (MCUs), embedded processors, and integrated circuits. Key features include the AVR enhanced RISC architecture executing 130 powerful instructions - most in a single clock cycle - 32 general purpose working registers, 35 programmable I/O lines, two flexible Timer/Counters with compare modes, a dedicated 8-bit Timer/Counter with PWM (OC0), and internal plus external interrupt sources. The 16 MHz speed grade (-16 suffix) supports full 16 MIPS performance across the industrial voltage range. A defining strength of the ATmega8515 is its external memory interface: address latching via ALE, plus dedicated /RD and /WR strobes allow direct connection of up to 64 KB of external SRAM. The port layout is deliberately 8051-footprint-oriented on the 40-pin PDIP, which historically enabled migration from classic 8051 designs to AVR with minimal PCB changes. Typical applications include legacy industrial control systems, test jigs and instrumentation, motor control and relay sequencing panels, hobby and educational platforms, and systems requiring UART, SPI, and external RAM expansion at low cost. When designing with this part, remember the 512 B internal SRAM limit: any larger data structures must live in external SRAM accessed through the XMEM interface, which consumes Port A and Port C as address/data buses and reduces available GPIO. This page synthesizes verified distributor data, drop-in alternatives, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet.

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ATMEGA8515-16PU - 8-Bit AVR MCU, 16MHz, 8KB Flash | Microchip
ATMEGA8515-16PU

ATMEGA8515-16PU - 8-Bit AVR MCU, 16MHz, 8KB Flash | Microchip

The Microchip Technology ATMEGA8515-16PU is a high-performance, low-power 8-bit AVR RISC microcontroller with 8 KB In-System Programmable Flash, 512 B EEPROM, 512 B SRAM, and support for up to 64 KB external memory, delivering 16 MIPS throughput at 16 MHz in a 40-pin PDIP (0.600 inch, 15.24 mm) package. An 8-bit AVR microcontroller is a single-chip computer built around the AVR enhanced RISC architecture, in which most instructions execute in a single clock cycle. Within the product hierarchy, it sits at the entry level of Microchip's ATmega AVR family: MCU -> 8-bit MCU -> AVR ATmega line. AVRs are widely used in embedded systems because they combine flash-based program storage, on-chip SRAM and EEPROM, and rich peripherals in a low-cost, low-power device that can be programmed in-system. Key features include the advanced RISC core with 130 powerful instructions, 32 general-purpose 8-bit registers, and a single-cycle ALU that yields 1 MIPS/MHz efficiency. The device operates from 4.5 V to 5.5 V at 16 MHz, integrates a UART, SPI, timers/counters with PWM, an 8-channel 10-bit-capable analog comparator path, and a JTAG (IEEE 1149.1) boundary-scan and on-chip debug interface. The Harvard architecture separates program and data buses, allowing simultaneous instruction fetch and data access. Self-programmable flash enables boot-loader-based field firmware updates without external programmers. Power management includes idle, power-down, and stand-by sleep modes, plus an on-chip brown-out detector and internal RC oscillator options. Typical applications include industrial control boards, legacy equipment maintenance, motor control and relay sequencing, hobby and educational systems, and interfaces using external SRAM expansion for data logging. Design tip: at 16 MHz and 5 V, keep VCC within 4.5-5.5 V and verify external memory timing when driving 64 KB of external SRAM. This page adds value beyond the datasheet with distributor pricing, drop-in alternatives, pinout, and practical design notes.

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ATMEGA8515L-8AC - 8KB Flash 8MHz AVR MCU | Microchip
ATMEGA8515L-8AC

ATMEGA8515L-8AC - 8KB Flash 8MHz AVR MCU | Microchip

The Microchip (Atmel) ATMEGA8515L-8AC is an 8-bit AVR RISC microcontroller with 8 KB self-programming In-System Programmable Flash (organized 4K x 16), 512 B EEPROM, 544 B internal SRAM expandable to 64 KB external SRAM, and a maximum clock frequency of 8 MHz, housed in a 44-pin TQFP (10 x 10 mm) surface-mount package. An 8-bit microcontroller is a single-chip computer that integrates a CPU core, program memory, data memory, and peripherals on one silicon die. The AVR family uses a Harvard-architecture RISC core in which most of its 130 instructions execute in a single clock cycle, placing this device in the embedded microcontroller class of the broader semiconductor hierarchy (MCU -> 8-bit MCU -> AVR ATmega family). Key features include up to 8 MIPS throughput at 8 MHz, fully static operation, in-system programmable Flash for field firmware updates, and a wide supply-voltage range for the L (low-voltage) speed grade, allowing operation down to about 2.7 V while remaining 5 V tolerant for legacy industrial designs. Peripheral set includes an 8-bit timer with PWM, a 16-bit timer, USART serial port, SPI, and an external memory interface for up to 64 KB of SRAM. The AVR enhanced RISC architecture pairs 32 general-purpose working registers directly with the ALU, so one instruction can load a register and perform an operation in a single cycle. This produces efficient C-compiled code density and deterministic execution, a core reason the ATmega family remains popular in legacy industrial systems. Typical applications include industrial control panels, embedded legacy equipment maintenance, motor and actuator control, and educational/hobby development boards where the external memory bus and expanded I/O of the ATmega8515 are required. A key design consideration is clock selection: the L-8AC grade is specified to 8 MHz, so systems designed for the 16 MHz ATMEGA8515-16A* grades must either derate the oscillator or select the faster part. This page synthesizes distributor inventory, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8AI - AVR 8-Bit MCU, 8KB Flash, 8MHz | Microchip
ATMEGA8515L-8AI

ATMEGA8515L-8AI - AVR 8-Bit MCU, 8KB Flash, 8MHz | Microchip

The Microchip Technology ATMEGA8515L-8AI is an 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 544 bytes of internal SRAM, 512 bytes of EEPROM, and an external memory interface supporting up to 64 KB of SRAM, delivered in a 44-pin TQFP (10x10 mm) package and rated for 8 MHz operation from 2.7 V to 5.5 V across the industrial temperature range of -40C to +85C. A microcontroller is a single-chip computer that integrates a processor core, memory, and programmable peripherals into one package, sitting at the heart of embedded systems in the broader hierarchy of semiconductors -> integrated circuits -> microcontrollers. The AVR architecture executes most of its 130 powerful instructions in a single clock cycle, so the ATmega8515L achieves up to 8 MIPS throughput at 8 MHz - roughly 1 MIPS per MHz - making it far more efficient per clock than many CISC 8-bit designs. Key features include self-programming Flash for field firmware updates, a full-duplex USART, SPI serial interface, one 16-bit and two 8-bit timers with PWM capability, an 8-channel 10-bit ADC replacement via external memory-mapped peripherals, and 35 programmable I/O lines. The external memory bus with address latching control distinguishes this family from smaller ATmega parts such as the ATmega8. Architecturally, the ATmega8515 is a low-power CMOS device based on the AVR enhanced RISC core with 32 general-purpose working registers directly connected to the ALU, fully static operation down to DC, and a Harvard bus structure separating program and data paths. Typical applications include industrial control panels, legacy AVR system maintenance and re-manufacturing, motor control interfaces, and external-memory expansion designs where the 64 KB SRAM bus is essential. For design, note the 'L' suffix limits clocking to 8 MHz - never substitute a 16 MHz grade part in a timing-critical firmware build without recalculating UART baud rates and timer constants. This page adds distributor stock data, pin-compatible ATmega8515 family drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8AUR - 8KB AVR MCU 8MHz TQFP-44 | Microchip
ATMEGA8515L-8AUR

ATMEGA8515L-8AUR - 8KB AVR MCU 8MHz TQFP-44 | Microchip

The Microchip Technology ATMEGA8515L-8AUR is an 8-bit AVR RISC microcontroller with 8 KB in-system programmable Flash, 512 B EEPROM, 512 B SRAM, and up to 64 KB external SRAM support, delivered in a 44-lead TQFP (10x10 mm, 0.8 mm pitch) package rated for the industrial temperature range of -40C to +85C and supply voltages of 2.7 V to 5.5 V. An AVR microcontroller is a Harvard-architecture, 8-bit RISC device in which most of its 130 instructions execute in a single clock cycle, so one megahertz of clock yields roughly one million instructions per second. In the broader system hierarchy it sits as the central processing element of an embedded control system, part of the Microchip ATmega family that spans from small ATmega8-class parts to large ATmega1280-class devices, and it belongs to the general class of microcontroller units (MCUs) within semiconductor integrated circuits. Key features include an external memory interface, which is rare in this size class and allows expansion to 64 KB of external SRAM; two flexible Timer/Counters with compare modes; a programmable serial USART; a programmable Watchdog Timer with on-chip oscillator; and 35 programmable I/O lines. The ATMEGA8515L speed grade is 0-8 MHz at 2.7-5.5 V, delivering about 8 MIPS of throughput. Technically, the device provides three power-saving sleep modes (Idle, Power-down, and Standby), on-chip debug via JTAG-compatible programming through SPI, and in-system programmability with read-while-write Flash support, allowing firmware updates in the field without removing the chip from the PCB. Typical applications include industrial automation controllers, instrumentation and data loggers, and legacy-drop-in repairs of 8051-era designs using the external memory interface; its 35 I/O lines and external bus make it a fit where peripheral expansion is needed. Design consideration: the L-suffix speed grade tops out at 8 MHz, so designs requiring 16 MIPS should use the ATMEGA8515-16AUR variant at 4.5-5.5 V. This page synthesizes distributor pricing, drop-in alternatives, pin-compatibility notes, and design guidance not found on the manufacturer datasheet alone.

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ATMEGA8515L-8JC - 8KB AVR MCU 8MHz 44-PLCC | Microchip
ATMEGA8515L-8JC

ATMEGA8515L-8JC - 8KB AVR MCU 8MHz 44-PLCC | Microchip

The Microchip Technology ATMEGA8515L-8JC is an 8-bit AVR RISC microcontroller with 8KB of In-System Programmable Flash memory, 544 bytes of internal SRAM (expandable to 64KB external), 512 bytes of EEPROM, and up to 8 MIPS throughput at its 8MHz maximum clock frequency, housed in a 44-pin PLCC (J-Lead, 16.6 x 16.6 mm) surface-mount package. An 8-bit microcontroller is an integrated circuit that integrates a processor core, program memory, data memory, and peripherals such as timers, PWM generators, and communication interfaces onto a single chip. The AVR family, originally developed by Atmel and now maintained by Microchip Technology, is a classic RISC (Reduced Instruction Set Computer) architecture: 130 powerful instructions, most executing in a single clock cycle, feeding a Harvard-architecture pipeline that delivers approximately one MIPS per MHz. Key features of the ATMEGA8515L-8JC include its wide 2.7V to 5.5V operating voltage range (the L speed grade permits full-rated 8MHz operation across the entire supply range), In-System Programmable Flash enabling field firmware updates, and integrated Brown-out Detect/Reset, Power-on Reset, PWM, and Watchdog Timer peripherals. It also supports up to 64KB of external SRAM expansion via its external memory interface, making it suitable for applications outgrowing internal RAM. On the technical side, the device provides 35 general-purpose I/O lines in the 44-pin package, a UART for serial communication, an SPI interface, 8-bit and 16-bit timers with PWM outputs, and an analog comparator. Fully static operation allows the clock to be stopped without loss of register contents, supporting aggressive low-power designs. Typical applications include industrial control and automation, consumer electronics, legacy embedded systems maintenance, motor control, and instrumentation where a proven 8-bit architecture, external memory expandability, and PLCC through-hole-serviceable footprint are valued. A key design consideration: the commercial-grade C suffix limits operation to 0C to +70C; industrial designs must select the I-variant instead. Also verify PLCC socket availability early, as this package style is increasingly legacy. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8JI - 8MHz AVR MCU 8KB Flash 44-PLCC | Microchip
ATMEGA8515L-8JI

ATMEGA8515L-8JI - 8MHz AVR MCU 8KB Flash 44-PLCC | Microchip

The Microchip Technology ATMEGA8515L-8JI is a low-power 8-bit AVR RISC microcontroller operating at up to 8 MHz, with 8 KB (4K x 16) of In-System Programmable FLASH memory, 512 bytes of internal SRAM expandable up to 64 KB of external SRAM, and 512 bytes of EEPROM, housed in a 44-pin PLCC (J-lead) package measuring 16.6 x 16.6 mm. An AVR ATmega microcontroller is a member of the 8-bit microcontroller family built on the AVR enhanced RISC architecture, in which most of its 130 powerful instructions execute in a single clock cycle. Within the system hierarchy, it sits at the level of an MCU (microcontroller unit), integrating CPU, program memory, data memory, peripherals, and I/O ports in one chip for embedded control applications. Key features include fully static operation, up to 8 MIPS throughput at 8 MHz (the family scales to 16 MIPS at 16 MHz), and an external memory interface (EBI/EMI) that addresses up to 64 KB of external SRAM - a distinctive capability of the ATmega8515 within the AVR portfolio. The device also provides SPI and UART/USART serial interfaces, flexible interrupt handling, and in-system programmable flash for firmware updates without removing the chip from the board. Architecturally, the ATmega8515 couples an AVR RISC core with Harvard memory organization, 32 general-purpose working registers directly connected to the ALU, and dedicated timer/PWM and serial peripherals. The 44-PLCC package exposes four 8-bit general-purpose I/O ports (PA, PB, PC, PD) plus the additional Port E function pins, with J-leads suited to through-hole-style PLCC sockets that simplify replacement during prototyping and field service. Typical applications include industrial control and automation, legacy embedded equipment maintenance, communication interfaces using UART and SPI, and motor or relay control tasks where external memory expansion is required. For design work, note that the "L" variant is rated for 8 MHz maximum clock; designs needing 16 MHz operation should select the ATMEGA8515-16x speed grade instead, and supply voltage range must be confirmed against the datasheet before reuse across speed grades. This page synthesizes distributor listings, drop-in alternative cross-references, and practical design guidance not consolidated in the manufacturer datasheet.

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ATMEGA8515L-8JJ - 8-bit AVR MCU, 8KB Flash, 44-PLCC | Microchip
ATMEGA8515L-8JJ

ATMEGA8515L-8JJ - 8-bit AVR MCU, 8KB Flash, 44-PLCC | Microchip

The Microchip Technology ATMEGA8515L-8JJ is an 8-bit AVR RISC microcontroller with 8 KB of in-system programmable Flash memory, 512 bytes of EEPROM, 512 bytes of internal SRAM plus support for up to 64 KB of external memory, executing up to 8 MIPS at its 8 MHz maximum clock frequency, housed in a 44-pin PLCC (16.6 x 16.6 mm) package rated for industrial temperatures. An 8-bit microcontroller is a complete computing system on a single chip that processes data in 8-bit words. The AVR family pioneered the RISC-style load/store architecture in microcontrollers, where most instructions execute in a single clock cycle. Within the power-management hierarchy of an embedded system, the MCU sits at the top of the control chain, supervising sensors, actuators, and communication peripherals. Key features of the ATMEGA8515L-8JJ include the AVR RISC core with 130 powerful instructions, mostly single-cycle; 32 x 8 general-purpose working registers; fully static operation; and an enhanced RISC Harvard architecture with separate program and data buses. The L suffix denotes a wide supply range of roughly 2.7 V to 5.5 V, allowing operation from 3 V or 5 V logic rails. The external memory interface is a standout technical capability: Port A provides a multiplexed 8-bit data bus (AD0-AD7) and Port C supplies up to 16 address lines (A8-A15 plus latched A0-A7 via ADx), with RD and WR strobes on Port D, enabling expansion to 64 KB of external SRAM. Peripherals include three timers with PWM outputs, a UART, an SPI port, an analog comparator, and programmable interrupt sources. Typical applications include industrial control panels, legacy embedded system maintenance, motor control boards, and communication equipment, where the external bus interface and PLCC socketed package simplify field replacement and through-hole-friendly assembly. Design consideration: verify the industrial temperature grade and 8 MHz speed grade against your clock plan; the non-L ATmega8515 variants run to 16 MHz but with a narrower supply range. This page synthesizes distributor data, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8JU - 8-bit AVR MCU 8MHz 8KB Flash | Microchip
ATMEGA8515L-8JU

ATMEGA8515L-8JU - 8-bit AVR MCU 8MHz 8KB Flash | Microchip

The Microchip Technology ATMEGA8515L-8JU is a high-performance, low-power 8-bit AVR RISC microcontroller with 8 KB of In-System Programmable Flash, 512 B EEPROM, 544 B internal SRAM (512 B SRAM plus 32 B register file), support for up to 64 KB external SRAM, and a maximum clock frequency of 8 MHz, housed in a 44-pin PLCC (J-leaded, 16.6 x 16.6 mm) package. An 8-bit microcontroller is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, sitting within the broader hierarchy of semiconductor devices: microcontroller -> embedded processor -> integrated circuit. The AVR architecture used here executes most instructions in a single clock cycle, so the ATMEGA8515L-8JU delivers up to 8 MIPS of throughput at its 8 MHz maximum rating, making it a classic choice for cost-sensitive embedded control systems. Key features include the advanced AVR RISC architecture with 130 powerful instructions, an 8 KB self-programmable Flash program memory rated for 10,000 write cycles, 512 B of EEPROM rated for 100,000 write cycles, and four 8-bit bidirectional I/O ports providing up to 35 programmable I/O lines (23 I/O on some package variants per distributor data). The device operates from a 4.5 V to 5.5 V supply in this 8 MHz 'L' speed grade at industrial temperature range, and its green/RoHS-compliant package suits lead-free assembly. Technically, the ATmega8515 core integrates a hardware multiplier path, external memory interface, and peripherals such as 8-bit and 16-bit timers with PWM, a USART, an SPI serial interface, and a 10-bit ADC depending on family variant configuration, with in-circuit programming supported via SPI using tools such as the MPLAB SNAP. Typical applications include industrial control panels, legacy equipment maintenance and repair, motor control boards, and embedded test fixtures where the PLCC socketed package allows easy field replacement. When designing with this part, remember the 4.5 V to 5.5 V operating window of the 8 MHz L grade; running at 5 V ensures full speed and I/O drive compliance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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ATMEGA8515L-8MC - 8-bit AVR MCU 8KB Flash 8MHz 44-VQFN | Microchip
ATMEGA8515L-8MC

ATMEGA8515L-8MC - 8-bit AVR MCU 8KB Flash 8MHz 44-VQFN | Microchip

The Microchip Technology ATMEGA8515L-8MC is an 8-bit AVR RISC microcontroller with 8KB of In-System Programmable Flash memory, 512B SRAM, 512B EEPROM, and up to 16 MIPS throughput capability, delivered in a 44-pin VQFN/MLF (7x7 mm, exposed pad) surface-mount package rated for 8 MHz operation at 2.7V to 5.5V. An 8-bit AVR microcontroller is a Harvard-architecture RISC processor in which program memory and data memory are accessed on separate buses, allowing most of its 130 powerful instructions to execute in a single clock cycle. Within the embedded systems hierarchy, it belongs to the AVR ATmega family under the broader categories of 8-bit microcontroller, MCU, and semiconductor integrated circuit. MCUs of this class combine CPU, memory, and peripherals in a single chip, serving as the control center of embedded systems. Key features include 8KB self-programming Flash program memory, 544 bytes of internal SRAM expandable to 64KB via external memory interface, 512B EEPROM for non-volatile data, and a rich peripheral set with UART, SPI, timers, and up to 35 programmable I/O lines. The RISC architecture delivers single-cycle execution for most instructions, giving deterministic timing that favors real-time designs. Technically, the fully static core permits clock operation down to DC, while the low-power AVR design supports idle and power-down sleep modes for battery-operated equipment. The external memory bus distinguishes the ATmega8515 from smaller ATmega parts, allowing expansion with external SRAM or memory-mapped peripherals. The L suffix indicates the extended voltage-speed grade, and the C suffix denotes the industrial MLF/VQFN package. Typical applications include industrial control panels, motor and actuator control boards, and legacy embedded systems requiring the external memory interface for data logging or display expansion. A key design consideration: the -8 grade guarantees full specification across 2.7V to 5.5V at 8 MHz, so do not clock above 8 MHz at 3.3V without derating review. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not consolidated in the manufacturer datasheet.

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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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