ATMEGA8535-16JUR - 8KB Flash 16MHz AVR MCU 44-PLCC | Microchip
MPN： ATMEGA8535-16JUR ✓ 啟用中ATMEGA8535-16JUR 概覽
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.
直接替換替代品，適用於 ATMEGA8535-16JUR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATMEGA8535-16JUR （相同外形與佔位） — 差異在於 EEPROM, Package, SRAM, Throughput, Flash Program Memory.
ATMEGA8535-16JU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8535-16JI
✅ 直接替換📋 參考替代品（不在目錄中）
ATMEGA8535-16JC
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8515-16JI
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8515-16JU
✅ 直接替換聯絡詢價
查看資料表 →ATMEGA8535-16JUR 最大額定值與電氣特性
| Core Architecture | 8-bit AVR RISC |
| Flash Program Memory | 8KB (4K x 16) |
| SRAM Data Memory | 544B |
| EEPROM | 512B |
| Maximum Clock Speed | 16 MHz |
| Peak Throughput | 16 MIPS at 16 MHz |
| 供應電壓 | 4.5 V to 5.5 V |
| ADC | 8-channel, 10-bit |
| GPIO Count | 32 |
| 封裝 | 44-PLCC (16.6 x 16.6 mm), J-Lead |
| 安裝類型 | Surface Mount |
| Series | AVR ATmega |
| Instruction Count | 130 instructions |
| Programmability | In-System Programmable (ISP) via SPI |
| Life Cycle Stage | ACTIVE |
ATMEGA8535-16JUR 44-plcc (16.6 x 16.6 mm), j-lead 腳位配置指南
ATMEGA8535-16JUR（44-plcc (16.6 x 16.6 mm), j-lead 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： ATMEGA8535-16JUR.
請參閱 資料表 以查看完整腳位配置。
典型應用
ATMEGA8535-16JUR 適用於 6 應用s: Industrial Control Systems, Multi-Channel Data Acquisition, Legacy Equipment Maintenance and Repair, Motor Control and PWM Applications, Educational and Prototyping Platforms, Instrumentation and Sensor Interfaces.
Industrial Control Systems
The ATMEGA8535-16JUR fits 5V industrial control boards because its 4.5V to 5.5V supply range connects directly to standard industrial 5V rails without regulators or level shifters, and its 32 GPIO lines drive relays, indicators and optocoupler inputs. The 16MHz clock provides 16 MIPS for deterministic control loops, while UART and SPI support Modbus-style serial links and peripheral expansion. The industrial temperature variant ATMEGA8535-16JI is available in the identical PLCC-44 footprint when the enclosure sees harsh temperatures, letting one PCB design serve both office-floor and plant-floor deployments with only a BOM change.
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Multi-Channel Data Acquisition
The integrated 8-channel, 10-bit ADC is the core reason to select the ATMEGA8535-16JUR for data-acquisition front ends: eight analog inputs (temperature, pressure, voltage monitoring) are sampled without an external converter, reducing BOM cost and board area. Placed in a sensor aggregation node, the MCU samples channels sequentially at kilohertz rates, applies averaging in the 544B of SRAM, and streams results over the UART. Because conversion accuracy depends on supply quality, use a clean AVCC rail with dedicated decoupling; the ADC reference can be taken from AVCC for ratiometric measurements against the same supply.
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Legacy Equipment Maintenance and Repair
Many 1990s and 2000s industrial and consumer products were designed around the ATmega8535 in socketed PLCC-44 packages, making the ATMEGA8535-16JUR a natural service spare. The J-lead PLCC footprint mates with zero-insertion-force sockets, allowing board-level replacement with simple tools and no reflow equipment. Firmware can be re-extracted and re-flashed via the SPI ISP interface using legacy AVR programmers. Because Microchip lists the lifecycle stage as ACTIVE, repair shops can source new units rather than harvested parts, and drop-in siblings ATMEGA8535-16JU, -16JI and -16JC broaden sourcing options when exact stock is scarce.
推薦
Motor Control and PWM Applications
The ATmega8535 provides multiple PWM outputs that, combined with the AVR's single-cycle instruction execution at 16MHz, support fan, DC motor and light-dimmer control with closed-loop feedback from the 10-bit ADC. A typical topology reads a speed or current sense signal on one ADC channel, executes a PI loop in firmware, and updates the PWM duty cycle each control period. The 5V I/O directly interfaces gate-driver inputs for small motors. Engineers should budget the 544B SRAM carefully, as full floating-point PID implementations plus communication buffers approach the on-chip data memory limit.
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Educational and Prototyping Platforms
The ATMEGA8535-16JUR is widely used in university embedded-systems courses because the AVR architecture is simple, fully documented, and supported by free C compilers, macro assemblers, debugger/simulators and evaluation kits per Microchip's documentation. The 130-instruction RISC set with mostly single-cycle execution is teachable at the assembly level, while the UART, SPI, ADC and timers cover a complete peripherals curriculum on one chip. The robust 44-PLCC package tolerates repeated handling on student boards, and ISP programming via a low-cost SPI dongle keeps per-station tooling expense minimal, making it practical for classroom-scale deployments.
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Instrumentation and Sensor Interfaces
Bench instruments and sensor hubs benefit from the ATMEGA8535-16JUR's combination of a 10-bit ADC, hardware UART for host communication, and SPI for external precision converters or displays when 10-bit resolution is insufficient. In a typical instrument front end, the MCU digitizes coarse signals internally, drives a character LCD or LED display via GPIO, and accepts calibration constants stored in the 512B EEPROM so each unit retains its calibration through power cycles. The 16MHz clock keeps command-response latency low for interactive instruments, and the 5V logic simplifies interfacing with legacy instrument backplanes and optocoupled isolation barriers.
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推薦產品摘要
工程參考資料，適用於 ATMEGA8535-16JUR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ATMEGA8535-16JU | ATMEGA8535-16JI | ATMEGA8515-16JI | ATMEGA8515-16JU |
|---|---|---|---|---|---|
| Package | 44-PLCC (16.6x16.6) | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same | 44-PLCC (16.6x16.6) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8KB | 8KB | 8KB | 8KB | 8KB |
| ADC | 8-channel 10-bit | 8-channel 10-bit | 8-channel 10-bit | None | None |
| Max Clock Speed | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| External Memory Interface | No | No | No | Yes | Yes |
主要差異化特點
- Integrated 8-channel 10-bit ADC (對比ATMEGA8515-16JI)
- Active lifecycle with broad drop-in variants (對比ATMEGA8535-16JU)
- Trade-off: 544B SRAM limits complex firmware (對比ATMEGA644-20AU)
設計說明
Estimated: at 16MHz and 5.0V the ATmega8535 active-mode current is on the order of 10-20 mA (confirm exact figure in the ATmega8535 datasheet active-supply-current table for the 16MHz, 5V condition), so a small linear regulator suffices. More important is supply quality for the 10-bit ADC: decouple VCC and AVCC separately with 100nF ceramic capacitors placed within 5mm of each pin, and connect AGND and GND at a single star point. Do not power the ADC reference from a rail shared with relay or LED drivers, or effective ADC resolution will drop below 10 bits.
The 44-PLCC J-lead package requires solder fillets on all four sides; use a land pattern per the PLCC-44 footprint in Microchip's ATmega8535 datasheet rather than a generic 0.8mm-pitch pattern, since J-leads need outward foot extension for reliable inspection. If the design may later migrate to the TQFP-44 ATMEGA8535-16AU, do NOT attempt a common footprint: PLCC and TQFP land patterns are incompatible. Reserve board area and plan a footprint revision instead. Leave probe-accessible test pads on RESET, MOSI, MISO and SCK for ISP reprogramming.
Three pitfalls recur with this device. First, the order-code suffix matters: 16JUR (tape and reel), 16JU, 16JI and 16JC differ in delivery format and temperature grade but share silicon - order the suffix your assembly line and environment require. Second, ATmega8515 is package-similar but has no ADC and a different pin function map, so it is not a firmware-compatible substitute despite the same PLCC-44 footprint. Third, verify ISP programmer support explicitly: some modern AVR programmers have dropped legacy ATmega8535 device profiles, which strands field-reprogramming plans.
合規資訊
Verified web data snippets do not state RoHS/REACH/lead-free status for ATMEGA8535-16JUR. Not an automotive part; AEC-Q100 not applicable. Confirm compliance certificates on Microchip's official product page.
