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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers~~ATMEGA8535-16MUR~~

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ATMEGA8535-16MUR - Microchip Technology

Name: Microchip Technology ATMEGA8535-16MUR
Brand: Microchip Technology
SKU: ATMEGA8535-16MUR
Price: 3.366 USD
Availability: InStock
Rating: 5 (1 reviews)

Manufacturer Part Number: ATMEGA8535-16MUR

Manufacturer: Microchip Technology

Allelco Part Number: 98D-ATMEGA8535-16MUR

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 46,137 pcs available, New & Original

Parts Description: IC MCU 8BIT 8KB FLASH 44VQFN

Package: 44-VQFN (7x7)

Data sheet: ATMEGA8535-16MU.pdf

Datasheets
Cylindrical Battery Holders.pdf

PCN Other
2.73KHz.pdf

PCN Design/Specification
Marking Chgs 11/Jul/2017.pdf Mold Compound 06/Dec/2022.pdf

PCN Packaging
MBB/Label Chgs 16/Nov/2018.pdf Boxes 07/Dec/2016.pdf

RoHs Status: ROHS3 Compliant

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In stock: 46137

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Subtotal: $0.00

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Quantity	Unit Price	Ext. Price
1+	$3.366	$3.37

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Specifications

ATMEGA8535-16MUR Tech Specifications
Microchip Technology - ATMEGA8535-16MUR technical specifications, attributes, parameters and parts with similar specifications to Microchip Technology - ATMEGA8535-16MUR

Product Attribute	Attribute Value
Manufacturer	Microchip Technology
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V
Supplier Device Package	44-VQFN (7x7)
Speed	16MHz
Series	AVR® ATmega
RAM Size	512 x 8
Program Memory Type	FLASH
Program Memory Size	8KB (4K x 16)
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Package / Case	44-VFQFN Exposed Pad
Package	Tape & Reel (TR)

Product Attribute	Attribute Value
Oscillator Type	Internal
Operating Temperature	-40°C ~ 85°C (TA)
Number of I/O	32
Mounting Type	Surface Mount
EEPROM Size	512 x 8
Data Converters	A/D 8x10b
Core Size	8-Bit
Core Processor	AVR
Connectivity	I²C, SPI, UART/USART
Base Product Number	ATMEGA8535

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.31.0001

Frequently Asked Questions(FAQ)

What are the key differences between the ATMEGA8535-16MUR and a typical 8-bit microcontroller in terms of memory architecture and peripheral integration for industrial control applications?: The ATMEGA8535-16MUR features an 8KB FLASH program memory organized as 4K x 16, providing sufficient code density for moderate complexity control loops while maintaining fast execution at 16MHz. Its integrated peripherals—including I2C, SPI, UART/USART, 8-channel 10-bit ADC, and brown-out detection—reduce external component count compared to basic 8-bit MCUs, making it suitable for space-constrained industrial monitoring systems where reliability and noise immunity are critical.

How does the operating voltage range of 4.5V to 5.5V affect system design when integrating the ATMEGA8535-16MUR with sensors and actuators in automotive or harsh environment applications?: The 4.5V to 5.5V supply window allows compatibility with standard TTL logic levels while accommodating minor voltage drops in long PCB traces or under transient loads. In automotive environments, this margin provides robustness against load dump events or battery sag, but designers must ensure all interfaced sensors operate within these bounds; otherwise, level-shifting circuitry may be required for 3.3V devices, adding cost and board area.

Can the internal oscillator of the ATMEGA8535-16MUR be used reliably in precision timing applications such as data logging with real-time clock synchronization?: While the internal oscillator supports operation up to 16MHz, its typical accuracy is ±10% over temperature and voltage variations, which is insufficient for precise timekeeping without calibration. For applications requiring accurate timestamping, an external crystal should be used instead, though this increases BOM cost and footprint.

What trade-offs exist between using the ATMEGA8535-16MUR’s built-in watchdog timer versus implementing software-based fault recovery in safety-critical embedded systems?: The hardware WDT offers deterministic response to software hangs with configurable timeout periods down to milliseconds, enhancing system resilience. However, it cannot detect logical errors or stack overflows. Software recovery may offer more nuanced error handling but risks missing timing deadlines during complex diagnostics—making the WDT valuable as a last-line defense in mission-critical deployments.

How does the 44-VQFN (7x7) package impact thermal management and layout complexity when replacing a DIP-40 version of the same MCU in legacy designs?: The VQFN’s exposed pad improves heat dissipation compared to DIP, allowing higher sustained current handling without derating. Yet, its fine-pitch QFN requires careful PCB layout with proper thermal vias and soldering profiles, increasing manufacturing complexity and risk of tombstoning during reflow—factors not present in through-hole packages like DIP-40.

When selecting between the ATMEGA8535-16MUR and a lower-power alternative like the ATMEGA8515-LU for battery-powered IoT nodes, how do power consumption characteristics influence decision-making beyond nominal voltage specifications?: Although both share similar architectures, the ATMEGA8535-16MUR draws significantly more active current due to its maximum frequency rating; at 16MHz, it consumes ~1.5mA/MHz versus ~0.8mA/MHz in sleep modes. For battery-operated devices prioritizing longevity over speed, a slower variant would extend operational life by 2–3×, despite identical memory footprints.

What considerations apply when cascading multiple ATMEGA8535-16MUR devices via SPI for distributed sensor networks in factory automation?: Daisy-chaining demands attention to propagation delays and signal integrity on shared lines; each additional node adds capacitive loading that can degrade edge sharpness at 16MHz. Designers should limit chain length to three or fewer units unless buffered repeaters are inserted, and verify timing margins using worst-case process corners to prevent data corruption.

How does the moisture sensitivity level (MSL) rating of 3 for the ATMEGA8535-16MUR inform storage and handling procedures during mass production with lead-free soldering?: MSL 3 indicates the part must be assembled within 168 hours after opening humidity-controlled packaging to avoid solder joint defects from condensation. This necessitates strict inventory rotation and dry-storing components in desiccated environments before reflow, especially in high-volume facilities lacking nitrogen reflow ovens.

In what scenarios would upgrading from the ATMEGA8535-16MUR to a newer AVR series microcontroller provide tangible benefits without redesigning the entire PCB?: If future projects require enhanced communication protocols (e.g., CAN, Ethernet), larger flash (>16KB), or advanced analog front-ends, migration makes sense. Otherwise, leveraging the existing footprint and toolchain minimizes NRE costs while offering marginal improvements in performance or peripheral richness.

How does the EEPROM size of 512 x 8 bytes impact non-volatile data retention strategies in metering or diagnostic equipment using the ATMEGA8535-16MUR?: With only 512 bytes available, frequent write cycles must be avoided due to limited endurance (~100k cycles). Instead, implement circular buffering or compress historical logs before storage. Alternatively, use external FRAM or battery-backed SRAM to preserve critical metrics without wear concerns.

What role does the brown-out detect feature play in preventing undefined behavior when power supplies fluctuate near the ATMEGA8535-16MUR’s minimum threshold of 4.5V?: The BOD monitors Vcc and triggers a controlled reset if voltage drops below a programmable level (typically 4.3V), halting CPU execution until stable power resumes. This prevents erratic operation during brownouts, ensuring firmware remains in a known state rather than executing corrupted instructions.

How does the UART/USART interface configuration affect baud rate accuracy when communicating with GPS modules using the ATMEGA8535-16MUR in outdoor navigation systems?: Baud rate tolerance depends on clock source stability. With the internal RC oscillator at ±10%, achieving exact rates like 9600 baud may introduce framing errors over long cables. Using an external crystal ensures tighter tolerance (<1%), reducing retransmissions and improving data integrity in noisy RF environments.

What precautions are necessary when routing high-speed signals adjacent to the ATMEGA8535-16MUR’s analog inputs in mixed-signal designs?: Analog traces should be isolated from digital lines to prevent coupling of switching noise into the 10-bit ADC channels. Maintain guard rings around sensitive paths, keep trace lengths short, and place ground planes beneath analog sections to minimize crosstalk and improve SNR in precision measurement applications.

How does the RoHS compliance status of the ATMEGA8535-16MUR simplify regulatory certification for consumer electronics manufacturers?: As a RoHS3-compliant device, it contains no restricted substances (lead, cadmium, mercury, etc.), eliminating the need for exemption documentation and reducing audit overhead during CE or FCC certification. This streamlines supply chain approvals and avoids potential recalls related to hazardous material violations.

What limitations arise when attempting to emulate the ATMEGA8535-16MUR’s PWM output behavior using bit-banged GPIO in resource-constrained firmware?: Bit-banged PWM lacks hardware timing precision, resulting in jitter exceeding 5% duty cycle error at 10kHz frequencies due to interrupt latency. Hardware timers in the ATMEGA8535-16MUR deliver nanosecond-level resolution, essential for motor control or LED dimming where flicker or torque ripple must be minimized.

How does the choice of programming interface (ICP vs. SPI) impact development workflow when deploying firmware updates to fielded systems based on the ATMEGA8535-16MUR?: In-system programming (ISP) over SPI allows direct reprogramming without removing the MCU, facilitating OTA updates. However, bootloader implementation consumes flash space and introduces security considerations. ICP via JTAG is faster for initial deployment but impractical post-integration, making ISP preferable for maintainable field upgrades.

What factors determine whether the ATMEGA8535-16MUR can drive capacitive loads directly from its GPIO pins without external buffers?: Each pin can source/sink ~40mA continuously, but driving large capacitances (e.g., >100pF) at high toggle rates risks excessive rise times and EMI. Use series termination resistors or buffer ICs for loads exceeding 50pF at frequencies above 1MHz to preserve signal integrity and protect the MCU from ESD damage.

How does the absence of verified support in the DiGi-Electronics program affect procurement planning for commercial off-the-shelf (COTS) projects using the ATMEGA8535-16MUR?: Unverified distributor status implies limited testing against their specific hardware platforms, potentially leading to compatibility issues during prototyping. Procurement teams should validate board bring-up independently, as supply chain assurance and lifecycle tracking rely solely on Microchip’s official documentation rather than third-party certifications.

Parts with Similar Specifications

The three parts on the right have similar specifications to Microchip Technology ATMEGA8535-16MUR

Product Attribute
Part Number	ATMEGA8535-16JUR	ATMEGA8535-16MU	ATMEGA8535-16JUR	ATMEGA8535-16MU
Manufacturer	Atmel	Microchip Technology	Microchip Technology	Atmel
Speed	-	-	-	-
RAM Size	-	-	-	-
Peripherals	-	-	-	-
Core Processor	-	-	-	-
Supplier Device Package	-	196-NFBGA (12x12)	16-PDIP	64-VQFN (9x9)
Core Size	-	-	-	-
Connectivity	-	-	-	-
Series	-	-	-	-
Package / Case	-	196-LFBGA	16-DIP (0.300', 7.62mm)	64-VFQFN Exposed Pad
Oscillator Type	-	-	-	-
Data Converters	-	-	-	-
Base Product Number	-	DAC34H84	MAX500	ADS62P42
Program Memory Size	-	-	-	-
EEPROM Size	-	-	-	-
Voltage - Supply (Vcc/Vdd)	-	-	-	-
Operating Temperature	-	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C
Number of I/O	-	-	-	-
Mounting Type	-	Surface Mount	Through Hole	Surface Mount
Program Memory Type	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)

ATMEGA8535-16MUR Datasheet PDF

Download ATMEGA8535-16MUR pdf datasheets and Microchip Technology documentation for ATMEGA8535-16MUR - Microchip Technology.

Datasheets: Cylindrical Battery Holders.pdf
PCN Other: 2.73KHz.pdf
PCN Design/Specification: Marking Chgs 11/Jul/2017.pdf Mold Compound 06/Dec/2022.pdf
PCN Packaging: MBB/Label Chgs 16/Nov/2018.pdf Boxes 07/Dec/2016.pdf

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Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

Note:: The above table is for reference only. There may have some data bias for the uncontrollable factors.
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