AT90LS2323-4PI Equivalent & Substitute Parts

Part Overview

The AT90LS2323-4PI is an 8-bit AVR microcontroller from Microchip Technology's AVR 90LS series, featuring 2KB FLASH program memory, 128 bytes each of EEPROM and RAM, and operating at 4MHz. This device is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support, redesigns, and production continuity. The AT90LS2323-4PI operates across a 2.7V to 6V supply range and includes integrated brown-out detection, power-on reset, and watchdog timer functionality in an 8-PDIP through-hole package.

Substiute Parts

AT90LS2323-4PI

Microchip TechnologyIn Stock: 2051AT90LS2323-4PI Datasheet

Current PartRFQ

ATTINY25V-10PU

Microchip TechnologyIn Stock: 5149ATTINY25V-10PU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT90LS2323-4PI is determined by the following critical parameters:

• Core Architecture: AVR processor family ensures instruction set compatibility
• Memory Configuration: Minimum 2KB FLASH, 128 bytes EEPROM, and 128 bytes RAM required
• Package Type: 8-DIP (0.300", 7.62mm) through-hole package for direct PCB compatibility
• Operating Temperature Range: -40°C to 85°C minimum to maintain thermal envelope
• Supply Voltage Range: Must accommodate the 2.7V to 6V operating window or a subset thereof
• I/O Pin Count: Minimum 3 I/O pins required for functional equivalence

The ATTINY25V-10PU meets these substitution criteria while offering enhanced specifications including higher clock speed (10MHz), expanded I/O capability (6 pins), integrated analog-to-digital conversion, and active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY25V-10PU is a direct functional substitute for the AT90LS2323-4PI based on the following engineering criteria:

Memory and Architecture Equivalence: Both devices feature identical 2KB FLASH, 128-byte EEPROM, and 128-byte RAM configurations with AVR core architecture, ensuring firmware compatibility at the memory level.

Package Compatibility: The 8-DIP (0.300", 7.62mm) through-hole package is identical, enabling direct PCB replacement without layout modifications.

Operational Envelope: The ATTINY25V-10PU operates within the -40°C to 85°C temperature range specified for the original part. Supply voltage range differs slightly (1.8V to 5.5V versus 2.7V to 6V); applications operating above 5.5V or below 1.8V require voltage regulation or alternative selection.

Product Status and Compliance: The ATTINY25V-10PU is in active production with RoHS3 compliance, addressing obsolescence and environmental regulatory requirements. The AT90LS2323-4PI is obsolete and RoHS non-compliant.

Performance Considerations: The ATTINY25V-10PU operates at 10MHz versus 4MHz for the original part. Applications with timing-dependent code, interrupt handlers, or external synchronization requirements must validate functional behavior at the higher clock frequency.

Frequently Asked Questions (FAQ)

Q: Can the ATTINY25V-10PU be used as a direct replacement in existing AT90LS2323-4PI designs?

A: Yes, for applications where the 10MHz clock speed is acceptable or beneficial. The identical package, memory configuration, and AVR architecture support direct PCB substitution. However, code timing dependencies must be evaluated. Applications requiring exactly 4MHz operation may need external clock division or oscillator selection.

Q: What are the supply voltage differences between these parts?

A: The AT90LS2323-4PI operates from 2.7V to 6V. The ATTINY25V-10PU operates from 1.8V to 5.5V. The substitute cannot operate above 5.5V; designs requiring 6V operation must retain the original part or implement voltage regulation.

Q: Are there firmware compatibility concerns?

A: Both devices use the AVR instruction set. Firmware compiled for the AT90LS2323-4PI will execute on the ATTINY25V-10PU. However, timing-dependent operations, delay loops, and interrupt service routines may require adjustment due to the 2.5x clock speed increase.

Q: What is the difference in I/O pin availability?

A: The AT90LS2323-4PI provides 3 I/O pins; the ATTINY25V-10PU provides 6 I/O pins. The substitute offers expanded I/O capacity without package size change, beneficial for designs requiring additional signal connections.

Q: Does the ATTINY25V-10PU include additional peripherals?

A: Yes. The ATTINY25V-10PU includes a 4-channel 10-bit analog-to-digital converter and PWM capability, features not present in the AT90LS2323-4PI. These additions do not interfere with basic digital I/O operation and may enhance system functionality.

Q: What is the RoHS compliance status?

A: The AT90LS2323-4PI is RoHS non-compliant. The ATTINY25V-10PU is RoHS3 compliant, meeting current environmental and regulatory standards for electronic components in most jurisdictions.

Q: Is the ATTINY25V-10PU available in production quantities?

A: Yes. The ATTINY25V-10PU is in active production status with 5070 pieces in stock, ensuring supply continuity compared to the obsolete AT90LS2323-4PI.