ATMEGA8535-16JC Equivalent & Substitute Parts

Part Overview

The ATMEGA8535-16JC is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 8KB of FLASH program memory, 512 bytes of EEPROM, and 512 bytes of RAM. Operating at 16MHz with a 4.5V to 5.5V supply voltage range, this device integrates 32 I/O pins, I2C/SPI/UART connectivity, and integrated analog-to-digital conversion (8x10-bit). The part is packaged in a 44-PLCC (J-Lead) surface mount configuration.

The ATMEGA8535-16JC is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing production support, design updates, or inventory replenishment where original stock is unavailable or depleted.

Key Parameters

Parameter	Value
Core Processor	AVR
Core Size	8-Bit
Speed	16MHz
Program Memory Size	8KB (4K x 16)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	512 x 8
Number of I/O	32
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V
Data Converters	A/D 8x10b
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Oscillator Type	Internal
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	44-LCC (J-Lead)
Supplier Device Package	44-PLCC (16.6x16.6)

Substitute Part Grouping Explanation

Substitution of the ATMEGA8535-16JC is determined by strict equivalence across the following critical parameters:

Core Architecture: AVR processor family
Memory Configuration: 8KB FLASH, 512 bytes EEPROM, 512 bytes RAM
Clock Speed: 16MHz operation
I/O Count: 32 pins
Supply Voltage Range: 4.5V ~ 5.5V
Package Type: 44-PLCC (J-Lead) surface mount
Connectivity Interfaces: I2C, SPI, UART/USART
Integrated Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
Data Conversion: 8-channel 10-bit analog-to-digital converter

The ATMEGA8535-16JU meets all these criteria and is classified as a direct substitute. Both parts share identical electrical specifications, memory architecture, peripheral integration, and physical packaging. The primary distinction is product status: the original part is obsolete, while the substitute remains in active production.

Parameter Comparison

Parameter	ATMEGA8535-16JC	ATMEGA8535-16JU	Match
Manufacturer	Microchip Technology	Atmel	Same Base Product
Core Processor	AVR	AVR	✓
Core Size	8-Bit	8-Bit	✓
Speed	16MHz	16MHz	✓
Program Memory Size	8KB (4K x 16)	8KB (4K x 16)	✓
Program Memory Type	FLASH	FLASH	✓
EEPROM Size	512 x 8	512 x 8	✓
RAM Size	512 x 8	512 x 8	✓
Number of I/O	32	32	✓
Voltage - Supply (Vcc/Vdd)	4.5V ~ 5.5V	4.5V ~ 5.5V	✓
Data Converters	A/D 8x10b	A/D 8x10b	✓
Connectivity	I2C, SPI, UART/USART	I2C, SPI, UART/USART	✓
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT	Brown-out Detect/Reset, POR, PWM, WDT	✓
Oscillator Type	Internal	Internal	✓
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	Extended Range
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	44-LCC (J-Lead)	44-LCC (J-Lead)	✓
Supplier Device Package	44-PLCC (16.6x16.6)	44-PLCC (16.6x16.6)	✓
Product Status	Obsolete	Active	Substitute Available
ECCN	EAR99	EAR99	✓
HTSUS	8542.31.0001	8542.31.0001	✓

Engineering Selection Recommendations

The ATMEGA8535-16JU is a direct functional and electrical equivalent to the ATMEGA8535-16JC. Both parts are classified under the same base product number (ATMEGA8535) and share identical core specifications, memory architecture, peripheral integration, and physical packaging.

The ATMEGA8535-16JU offers an extended operating temperature range (-40°C to 85°C) compared to the original part (0°C to 70°C), providing greater thermal margin for applications operating in wider environmental conditions.

The primary advantage of selecting the ATMEGA8535-16JU is product availability and lifecycle status. The substitute part is in active production, ensuring long-term supply continuity and support. Both parts carry identical export classifications (ECCN: EAR99) and tariff codes (HTSUS: 8542.31.0001), simplifying procurement and compliance documentation.

No design modifications, firmware changes, or board-level alterations are required when transitioning from the ATMEGA8535-16JC to the ATMEGA8535-16JU. Pin-for-pin compatibility, electrical characteristics, and functional behavior remain identical across all specified operating conditions within the original part's temperature range.

Frequently Asked Questions (FAQ)

Q: Are the ATMEGA8535-16JC and ATMEGA8535-16JU pin-compatible?

A: Yes. Both parts use the 44-PLCC (J-Lead) package with identical pin assignments, electrical characteristics, and functional behavior. No PCB modifications are required.

Q: What is the primary difference between these two parts?

A: The ATMEGA8535-16JU is in active production status, while the ATMEGA8535-16JC is obsolete. The substitute part also offers an extended operating temperature range (-40°C to 85°C versus 0°C to 70°C).

Q: Can I use the ATMEGA8535-16JU in applications originally designed for the ATMEGA8535-16JC?

A: Yes. The substitute part is electrically and functionally equivalent. All memory sizes, clock speeds, I/O counts, connectivity interfaces, and integrated peripherals are identical. Existing firmware and board designs require no modification.

Q: Are there any compliance or export restrictions affecting the ATMEGA8535-16JU?

A: Both parts carry identical export classifications (ECCN: EAR99) and tariff codes (HTSUS: 8542.31.0001). No additional compliance considerations apply to the substitute part.

Q: What supply voltage range does the ATMEGA8535-16JU support?

A: The substitute part operates across 4.5V to 5.5V, identical to the original ATMEGA8535-16JC. No power supply modifications are necessary.

Q: Does the ATMEGA8535-16JU support the same connectivity interfaces?

A: Yes. Both parts integrate I2C, SPI, and UART/USART interfaces, along with identical peripheral features including brown-out detection, power-on reset, PWM, and watchdog timer functionality.

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