AT90S2333-8PC Equivalent & Substitute Parts

Part Overview

The AT90S2333-8PC is an 8-bit AVR microcontroller manufactured by Microchip Technology, featuring 2KB of FLASH program memory and operating at 8MHz. This device is classified as obsolete and is no longer in active production. Finding equivalent or substitute parts is necessary due to product discontinuation and the need for continued system support or new designs requiring similar functionality.

Substiute Parts

AT90S2333-8PC

Microchip TechnologyIn Stock: 1410AT90S2333-8PC Datasheet

Current PartRFQ

ATMEGA8L-8PU

Microchip TechnologyIn Stock: 6587ATMEGA8L-8PU Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT90S2333-8PC is determined by the following critical parameters:

• Core Architecture: AVR processor family compatibility
• Package Type: 28-DIP form factor for mechanical and electrical pin compatibility
• Memory Configuration: Program memory, EEPROM, and RAM capacity must meet or exceed the original specification
• Operating Voltage Range: Supply voltage compatibility within acceptable margins
• I/O Count: Minimum number of I/O pins required for circuit functionality
• Connectivity Interfaces: SPI and UART/USART support for communication protocols
• Speed Rating: 8MHz operation capability

The ATMEGA8L-8PU qualifies as a substitute based on matching core architecture, identical package format, compatible voltage operation, and enhanced memory specifications that provide backward compatibility with designs originally using the AT90S2333-8PC.

Parameter Comparison

Engineering Selection Recommendations

The ATMEGA8L-8PU is a direct substitute for the AT90S2333-8PC based on the following engineering criteria:

Compatibility Factors:

• Identical 28-DIP package ensures pin-for-pin mechanical compatibility
• AVR core architecture maintains instruction set compatibility
• Matching 8MHz speed rating preserves timing characteristics
• Enhanced memory specifications (8KB FLASH, 512B EEPROM, 1KB RAM) provide expanded capacity without functional degradation

Compliance Advantages:

• ATMEGA8L-8PU holds Active product status, ensuring continued availability and manufacturing support
• ROHS3 compliance meets current environmental and regulatory requirements
• AT90S2333-8PC is obsolete and subject to supply discontinuation

Operational Considerations:

• ATMEGA8L-8PU operates across a wider voltage range (2.7V ~ 5.5V) compared to the original (4V ~ 6V), providing greater design flexibility
• Extended operating temperature range (-40°C ~ 85°C) accommodates broader environmental conditions
• Additional I/O pins (23 vs. 20) and I2C connectivity interface provide enhanced functionality

Frequently Asked Questions (FAQ)

Q: Can the ATMEGA8L-8PU directly replace the AT90S2333-8PC without circuit modifications?

A: Yes, the ATMEGA8L-8PU is pin-compatible in the 28-DIP package. Both devices share identical pin assignments for power, ground, I/O, and communication interfaces. No circuit board modifications are required for mechanical and electrical substitution.

Q: What are the key differences between these two microcontrollers?

A: The primary differences are program memory capacity (2KB vs. 8KB), EEPROM size (128B vs. 512B), RAM capacity (128B vs. 1KB), I/O pin count (20 vs. 23), and additional I2C connectivity on the ATMEGA8L-8PU. The ATMEGA8L-8PU also supports a wider supply voltage range and extended operating temperature specifications.

Q: Is the ATMEGA8L-8PU suitable for designs originally targeting the AT90S2333-8PC?

A: Yes. The ATMEGA8L-8PU maintains full backward compatibility with the AT90S2333-8PC instruction set and peripheral interfaces. Existing firmware compiled for the AT90S2333-8PC will execute on the ATMEGA8L-8PU without modification.

Q: What is the significance of the product status difference?

A: The AT90S2333-8PC is obsolete and no longer manufactured. The ATMEGA8L-8PU is in active production, ensuring reliable long-term availability, consistent quality, and manufacturer support for new designs and production runs.

Q: Are there any voltage supply considerations when substituting these parts?

A: The AT90S2333-8PC requires 4V ~ 6V supply voltage, while the ATMEGA8L-8PU operates from 2.7V ~ 5.5V. Designs operating at 4V ~ 5.5V are fully compatible with both devices. Designs operating below 4V or above 5.5V require evaluation against the ATMEGA8L-8PU specifications.

Q: Does the ATMEGA8L-8PU require different programming or configuration?

A: Both devices use identical AVR programming protocols and interfaces. Existing programming tools and procedures for the AT90S2333-8PC are compatible with the ATMEGA8L-8PU. No changes to development workflows or programming equipment are necessary.