AT90S8535-8PC Equivalent & Substitute Parts

Part Overview

The AT90S8535-8PC 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 40-pin DIP package and supports SPI and UART/USART connectivity interfaces.

The AT90S8535-8PC is classified as obsolete. Locating equivalent or substitute components is necessary for ongoing system maintenance, design updates, or production continuity when original inventory becomes unavailable.

Substiute Parts

AT90S8535-8PC

Microchip TechnologyIn Stock: 1240AT90S8535-8PC Datasheet

Current PartRFQ

ATMEGA8535L-8PU

Microchip TechnologyIn Stock: 7078ATMEGA8535L-8PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT90S8535-8PC is determined by strict equivalence across the following critical parameters:

Core processor architecture (AVR), core size (8-Bit), program memory capacity (8KB FLASH), EEPROM capacity (512 x 8), RAM capacity (512 x 8), I/O count (32 pins), data converter specification (A/D 8x10b), and physical package format (40-DIP). The substitute part must maintain identical or compatible connectivity interfaces (SPI, UART/USART) and peripheral feature sets (Brown-out Detect/Reset, POR, PWM, WDT).

The ATMEGA8535L-8PU meets these substitution criteria. Both devices share the same core architecture, memory configuration, I/O count, and package footprint. The substitute part provides expanded voltage supply range and extended operating temperature range, with improved RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA8535L-8PU serves as a direct functional substitute for the AT90S8535-8PC. Both devices are classified as obsolete products from Microchip Technology.

The substitute part offers improved compliance characteristics: ATMEGA8535L-8PU achieves ROHS3 compliance, whereas the original AT90S8535-8PC is RoHS non-compliant. The substitute part also provides an expanded voltage supply range (2.7V ~ 5.5V versus 4V ~ 6V) and extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C).

The ATMEGA8535L-8PU includes I2C connectivity in addition to the SPI and UART/USART interfaces present in the original device. Pin-to-pin compatibility and identical package footprint (40-DIP) ensure direct replacement capability in existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Are AT90S8535-8PC and ATMEGA8535L-8PU pin-compatible?

A: Yes. Both devices use the 40-DIP package with identical pin assignments and electrical characteristics for all I/O pins. Direct socket replacement is possible without PCB modification.

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

A: The ATMEGA8535L-8PU provides expanded voltage supply range (2.7V ~ 5.5V), extended operating temperature range (-40°C ~ 85°C), and improved RoHS compliance (ROHS3). The substitute part also includes I2C connectivity as an additional interface option.

Q: Can I use ATMEGA8535L-8PU in applications originally designed for AT90S8535-8PC?

A: Yes, provided the application operates within the voltage and temperature specifications of the original design. The expanded operating ranges of the substitute part do not create compatibility issues for designs operating within the original AT90S8535-8PC specifications.

Q: Does the addition of I2C connectivity on ATMEGA8535L-8PU affect existing SPI and UART/USART implementations?

A: No. The I2C interface is an additional feature that does not interfere with existing SPI and UART/USART communication protocols. Existing firmware and hardware designs require no modification.

Q: What is the RoHS compliance status difference?

A: AT90S8535-8PC is RoHS non-compliant. ATMEGA8535L-8PU is ROHS3 compliant, meeting current environmental and regulatory standards for electronic components.