AT90LS2343-4PI Equivalent & Substitute Parts

Part Overview

The AT90LS2343-4PI 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-power operation across a 2.7V to 6V supply range, this device integrates brown-out detection, power-on reset, and watchdog timer functionality in an 8-PDIP package.

The AT90LS2343-4PI is classified as obsolete. Identifying functionally equivalent substitute parts is necessary to support legacy system maintenance, design updates, and continued component availability for production environments.

Substiute Parts

AT90LS2343-4PI

Microchip TechnologyIn Stock: 1791AT90LS2343-4PI Datasheet

Current PartRFQ

ATTINY25V-10PU

Microchip TechnologyIn Stock: 5149ATTINY25V-10PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT90LS2343-4PI is determined by the following critical parameters:

• Core Architecture: AVR processor family
• Memory Configuration: 2KB FLASH program memory, 128 x 8 EEPROM, 128 x 8 RAM
• Package Format: 8-DIP (0.300", 7.62mm) through-hole mounting
• Operating Temperature Range: -40°C to 85°C
• Supply Voltage Compatibility: Overlapping or extended voltage operating range

The ATTINY25V-10PU meets these substitution criteria. Both devices share identical memory architecture, package footprint, and operating temperature specifications. The substitute part maintains full pin compatibility and memory capacity equivalence, enabling direct functional replacement in legacy applications.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY25V-10PU is a direct functional substitute for the AT90LS2343-4PI based on the following engineering criteria:

Memory Equivalence: Both devices provide identical 2KB FLASH program memory, 128-byte EEPROM, and 128-byte RAM configurations, ensuring software compatibility for applications developed for the original part.

Package Compatibility: Both parts utilize the 8-DIP (0.300", 7.62mm) through-hole package, enabling direct PCB socket replacement without layout modifications.

Thermal Operating Range: Identical -40°C to 85°C operating temperature specifications ensure equivalent performance across industrial and commercial temperature environments.

Compliance Status: The ATTINY25V-10PU is ROHS3 compliant and carries active product status, providing long-term supply chain stability and regulatory compliance advantages over the obsolete AT90LS2343-4PI.

Performance Enhancement: The substitute part operates at 10MHz versus 4MHz, providing increased processing capability without requiring design changes. The extended I/O count (6 versus 5) and integrated analog-to-digital converter offer additional functionality for enhanced system designs.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY25V-10PU replace the AT90LS2343-4PI in existing designs?

A: Yes. Both devices share identical memory architecture (2KB FLASH, 128-byte EEPROM, 128-byte RAM), 8-DIP package footprint, and operating temperature range. Direct socket replacement is possible without PCB modifications.

Q: What are the key differences between these parts?

A: The ATTINY25V-10PU operates at 10MHz compared to 4MHz for the AT90LS2343-4PI, provides one additional I/O pin (6 versus 5), includes a 4-channel 10-bit analog-to-digital converter, and features ROHS3 compliance with active product status. Supply voltage range differs slightly: 1.8V–5.5V for the substitute versus 2.7V–6V for the original.

Q: Are there connectivity differences?

A: The original part features SPI connectivity, while the substitute implements USI (Universal Serial Interface). Both provide serial communication capability; however, firmware implementation may require adjustment based on specific application requirements.

Q: Is the 8-DIP package identical for both parts?

A: Yes. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with identical pin spacing and mounting requirements, ensuring mechanical and electrical compatibility on existing PCBs.

Q: What is the supply voltage compatibility?

A: The ATTINY25V-10PU operates across 1.8V to 5.5V, which overlaps with the original part's 2.7V to 6V range. Applications operating within 2.7V to 5.5V are fully compatible. Systems requiring operation below 2.7V or above 5.5V require evaluation against the substitute's specifications.

Q: Does the higher clock speed affect power consumption?

A: The 10MHz operation of the ATTINY25V-10PU may increase power consumption compared to the 4MHz AT90LS2343-4PI under equivalent load conditions. Applications with strict power budgets should evaluate current draw specifications for both devices.