ATMEGA8535L-8PC Equivalent & Substitute Parts

Part Overview

The ATMEGA8535L-8PC 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. This device operates at 8MHz with a supply voltage range of 2.7V to 5.5V and includes integrated peripherals such as I2C, SPI, UART/USART connectivity, PWM, watchdog timer, and brown-out detection. The part is mounted in a 40-pin DIP package via through-hole technology.

The ATMEGA8535L-8PC is classified as obsolete. Locating equivalent substitute parts is necessary to support legacy system maintenance, board repairs, and continued production of devices utilizing this microcontroller architecture.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Core Processor	AVR
Core Size	8-Bit
Speed	8MHz
Program Memory Size	8KB (4K x 16)
Program Memory Type	FLASH
EEPROM Size	512 x 8
RAM Size	512 x 8
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V
Number of I/O	32
Data Converters	A/D 8x10b
Connectivity	I2C, SPI, UART/USART
Peripherals	Brown-out Detect/Reset, POR, PWM, WDT
Mounting Type	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)
Oscillator Type	Internal

Substitute Part Grouping Explanation

Substitution eligibility for the ATMEGA8535L-8PC is determined by strict equivalence across the following critical parameters:

Core processor architecture (AVR)
Core size (8-Bit)
Operating speed (8MHz)
Program memory capacity and type (8KB FLASH)
EEPROM and RAM sizes (512 x 8 each)
Supply voltage range (2.7V ~ 5.5V)
I/O count (32 pins)
Connectivity interfaces (I2C, SPI, UART/USART)
Peripheral feature set (Brown-out Detect/Reset, POR, PWM, WDT)
Package type and pin count (40-DIP)
Mounting technology (Through Hole)

The ATMEGA8535L-8PU qualifies as a direct substitute based on identical electrical specifications and functional capabilities across all parameters listed above. The primary difference is the packaging format (Tube versus standard packaging) and operating temperature range extension.

Parameter Comparison

Parameter	ATMEGA8535L-8PC	ATMEGA8535L-8PU
Manufacturer	Microchip Technology	Microchip Technology
Core Processor	AVR	AVR
Core Size	8-Bit	8-Bit
Speed	8MHz	8MHz
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
Voltage Supply (Vcc/Vdd)	2.7V ~ 5.5V	2.7V ~ 5.5V
Number of I/O	32	32
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
Mounting Type	Through Hole	Through Hole
Package / Case	40-DIP (0.600", 15.24mm)	40-DIP (0.600", 15.24mm)
Oscillator Type	Internal	Internal
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Product Status	Obsolete	Obsolete
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The ATMEGA8535L-8PU serves as a functional equivalent to the ATMEGA8535L-8PC for applications requiring identical electrical and operational characteristics. Both devices are classified as obsolete products.

Selection between these parts should be based on the following criteria:

ATMEGA8535L-8PC is appropriate for legacy system maintenance where the original part specification must be preserved exactly, including the original packaging format and RoHS compliance status.

ATMEGA8535L-8PU is appropriate for applications where extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) provides operational advantage, or where ROHS3 compliance is required by procurement or regulatory standards. This part offers broader environmental operating conditions and improved compliance certification.

Both parts maintain identical pin configuration, electrical performance, and functional capability, ensuring direct substitution at the circuit board level without design modification.

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA8535L-8PU replace the ATMEGA8535L-8PC in existing designs?

A: Yes. Both parts share identical electrical specifications, pin configuration, and functional capabilities. The ATMEGA8535L-8PU can be substituted directly without circuit modification. The primary differences are operating temperature range and RoHS compliance status.

Q: What is the difference between the ATMEGA8535L-8PC and ATMEGA8535L-8PU?

A: The parts are electrically and functionally identical. The ATMEGA8535L-8PC operates from 0°C to 70°C and is RoHS non-compliant. The ATMEGA8535L-8PU operates from -40°C to 85°C and is ROHS3 compliant. Both use 40-DIP through-hole packaging with identical pin assignments.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. Both parts are manufactured by Microchip Technology and share the same AVR core architecture, memory configuration, and peripheral set. Pin-for-pin compatibility is guaranteed.

Q: Which part should be selected for new designs?

A: Both parts are classified as obsolete. For new designs, evaluation of current-generation AVR microcontroller alternatives from Microchip Technology is recommended based on specific application requirements.

Q: What is the significance of the packaging designation (PC versus PU)?

A: The "PC" designation indicates standard packaging, while "PU" indicates tube packaging. Both use identical 40-DIP through-hole package geometry. The packaging designation does not affect electrical performance or pin compatibility.

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