AT90LS2343-1PC Equivalent & Substitute Parts

Part Overview

The AT90LS2343-1PC is an 8-bit AVR microcontroller from Microchip Technology's AVR 90LS series, featuring 2KB of FLASH program memory, 128 bytes of EEPROM, and 128 bytes of RAM. Designed for embedded applications requiring low-speed operation at 1MHz with supply voltage range of 2.7V to 6V, this device integrates brown-out detection, power-on reset, and watchdog timer functionality in an 8-PDIP package.

The AT90LS2343-1PC is classified as obsolete. Locating equivalent substitute parts is necessary to support legacy system maintenance, design updates, and continued production where original components are no longer readily available or have been discontinued by the manufacturer.

Substiute Parts

AT90LS2343-1PC

Microchip TechnologyIn Stock: 934AT90LS2343-1PC Datasheet

Current PartRFQ

ATTINY25V-10PU

Microchip TechnologyIn Stock: 5149ATTINY25V-10PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT90LS2343-1PC is determined by the following critical parameters:

Memory Configuration: Program memory must be 2KB FLASH (1K x 16), EEPROM must be 128 x 8, and RAM must be 128 x 8. These specifications ensure functional equivalence for code storage and data handling.

Package Compatibility: The substitute part must use 8-DIP (0.300", 7.62mm) through-hole packaging to maintain mechanical and electrical compatibility with existing PCB layouts and sockets.

Core Architecture: The substitute must be based on the AVR core processor architecture to ensure instruction set compatibility and software portability.

Electrical Specifications: Supply voltage range and pin configuration must support the operating environment of the original design.

The ATTINY25V-10PU meets all substitution criteria through identical memory configuration, matching package format, and compatible AVR core architecture.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY25V-10PU is a direct functional substitute for the AT90LS2343-1PC based on identical memory architecture, matching package format, and compatible AVR instruction set.

Product Status Advantage: The ATTINY25V-10PU is classified as active production, ensuring long-term availability and supply chain stability compared to the obsolete AT90LS2343-1PC.

Compliance Status: The ATTINY25V-10PU is ROHS3 compliant, meeting current environmental and regulatory requirements. The original AT90LS2343-1PC is RoHS non-compliant, which may present procurement or regulatory constraints in certain markets.

Operating Envelope: The ATTINY25V-10PU supports an extended operating temperature range (-40°C to 85°C) and lower minimum supply voltage (1.8V) compared to the original part (0°C to 70°C, 2.7V minimum). These expanded specifications provide greater design flexibility for diverse application environments.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY25V-10PU directly replace the AT90LS2343-1PC in existing designs?

A: Yes. Both devices share identical program memory (2KB FLASH), EEPROM (128 x 8), RAM (128 x 8), and 8-DIP package format. The AVR core architecture ensures instruction set compatibility. No PCB modifications are required.

Q: What are the key differences between these parts?

A: The ATTINY25V-10PU operates at 10MHz versus 1MHz for the AT90LS2343-1PC, supports a lower minimum supply voltage (1.8V vs. 2.7V), and operates across a wider temperature range (-40°C to 85°C vs. 0°C to 70°C). The ATTINY25V-10PU is in active production and ROHS3 compliant, while the AT90LS2343-1PC is obsolete and RoHS non-compliant.

Q: Are there any pin configuration differences?

A: Both devices use 8-DIP (0.300", 7.62mm) through-hole packaging with identical pin counts and compatible pinout for the core functionality specified in this reference.

Q: What is the supply voltage compatibility?

A: The AT90LS2343-1PC operates from 2.7V to 6V. The ATTINY25V-10PU operates from 1.8V to 5.5V. Designs operating within the 2.7V to 5.5V range are fully compatible with both parts.

Q: Is firmware migration required?

A: Both devices use the AVR instruction set architecture. Existing firmware compiled for the AT90LS2343-1PC will execute on the ATTINY25V-10PU without modification, provided the application does not depend on the specific 1MHz clock speed of the original part.