AT90LS2323-4SC Equivalent & Substitute Parts

Part Overview

The AT90LS2323-4SC 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 and new design implementations. The part operates within a 2.7V to 6V supply range and includes integrated brown-out detection, power-on reset, and watchdog timer functionality in an 8-SOIC surface mount package.

Substiute Parts

AT90LS2323-4SC

Microchip TechnologyIn Stock: 770AT90LS2323-4SC Datasheet

Current PartRFQ

ATTINY25V-10SU

Microchip TechnologyIn Stock: 22738ATTINY25V-10SU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AT90LS2323-4SC is determined by strict equivalence across the following critical parameters:

• Core Architecture: AVR processor family ensures instruction set compatibility
• Memory Configuration: Identical 2KB FLASH, 128-byte EEPROM, and 128-byte RAM
• Package Type: 8-SOIC surface mount package with matching 0.209" (5.30mm) width
• Supply Voltage Range: Compatible operating voltage envelope
• Peripheral Integration: Presence of brown-out detection, power-on reset, and watchdog timer

The ATTINY25V-10SU qualifies as a direct substitute based on these parameters. While the substitute part exhibits enhanced specifications in certain areas (higher clock speed, extended temperature range, improved compliance status), these represent functional improvements rather than deviations from the core substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

The ATTINY25V-10SU is a qualified substitute for the AT90LS2323-4SC based on matching core architecture, memory configuration, and package specifications. Selection of the substitute part is supported by the following factors:

• Product Status: The AT90LS2323-4SC is obsolete, whereas the ATTINY25V-10SU maintains active production status, ensuring long-term availability and supply chain stability.
• Compliance Status: The ATTINY25V-10SU is ROHS3 compliant, meeting current regulatory requirements. The original part is RoHS non-compliant.
• Functional Enhancements: The substitute provides increased clock speed (10MHz vs. 4MHz), extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C), and additional I/O pins (6 vs. 3), representing improvements over the original specification.
• Supply Availability: The ATTINY25V-10SU is available in high inventory (22,661 units), compared to the original part's limited stock (678 units).

Frequently Asked Questions (FAQ)

Q: Can the ATTINY25V-10SU directly replace the AT90LS2323-4SC in existing designs?

A: Yes. Both devices share identical core architecture (AVR 8-bit), memory configuration (2KB FLASH, 128-byte EEPROM and RAM), and 8-SOIC package dimensions. The substitute operates within compatible voltage and temperature ranges for most applications. Verification of specific application requirements is necessary for designs operating at the thermal or voltage extremes of the original part's specification.

Q: What are the key differences between these parts?

A: The ATTINY25V-10SU operates at higher clock speed (10MHz vs. 4MHz), supports an extended temperature range (-40°C to 85°C vs. 0°C to 70°C), provides additional I/O pins (6 vs. 3), includes analog-to-digital conversion capability, and meets ROHS3 compliance. The original part operates at lower speed and narrower temperature range.

Q: Are the packages physically identical?

A: Yes. Both parts use the 8-SOIC package with 0.209" (5.30mm) width, ensuring identical PCB footprint and mounting compatibility.

Q: What is the supply voltage compatibility?

A: The AT90LS2323-4SC operates at 2.7V to 6V. The ATTINY25V-10SU operates at 1.8V to 5.5V. The overlap range (2.7V to 5.5V) ensures compatibility for applications within this envelope. Applications requiring operation below 2.7V or above 5.5V require design verification.

Q: Does the higher clock speed of the substitute affect power consumption?

A: Clock speed influences dynamic power consumption. The ATTINY25V-10SU's 10MHz capability does not mandate operation at this speed; the device can be configured for lower clock frequencies to match original application requirements and power budgets.

Q: Are there connectivity differences?

A: The AT90LS2323-4SC features SPI connectivity. The ATTINY25V-10SU features USI (Universal Serial Interface) connectivity, which provides broader communication protocol support including SPI compatibility.