Equivalent & Substitute Parts for 25LC040-I/P

Part Overview

The 25LC040-I/P is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 2 MHz with 8-PDIP through-hole packaging. This device is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part is unavailable, when higher clock frequency operation is required, or when extended temperature range specifications are needed for specific application requirements.

Substiute Parts

25LC040-I/P

Microchip TechnologyIn Stock: 209525LC040-I/P Datasheet

Current PartRFQ

25LC040A-I/P

Microchip TechnologyIn Stock: 145125LC040A-I/P Datasheet

DirectRFQ

25AA040A-I/P

Microchip TechnologyIn Stock: 321225AA040A-I/P Datasheet

MFR RecommendedRFQ

25LC040A-E/P

Microchip TechnologyIn Stock: 156325LC040A-E/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25LC040-I/P is determined by the following critical parameters: memory size (4Kbit), memory organization (512 x 8), SPI interface protocol, package type (8-DIP), and through-hole mounting configuration. All substitute parts must maintain these core specifications to ensure functional compatibility.

The substitute parts are grouped into two categories based on operational enhancements:

Category 1: Direct Pin-Compatible Substitutes with Enhanced Clock Frequency Parts 25LC040A-I/P and 25LC040A-E/P operate at 10 MHz clock frequency while maintaining identical memory capacity, organization, and SPI interface. These parts are backward compatible with 25LC040-I/P applications.

Category 2: Manufacturer-Recommended Substitute with Extended Supply Voltage Range Part 25AA040A-I/P operates at 10 MHz and supports extended supply voltage range (1.8V ~ 5.5V), providing broader voltage compatibility while maintaining all other core specifications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original 25LC040-I/P specification.

25LC040A-I/P provides direct substitution with enhanced 10 MHz clock frequency operation while maintaining identical voltage supply range and temperature specifications. This part is suitable for applications requiring higher data throughput without voltage or temperature constraint modifications.

25AA040A-I/P is the manufacturer-recommended substitute offering extended supply voltage range (1.8V ~ 5.5V) in addition to 10 MHz clock frequency. This part accommodates applications operating at lower supply voltages while maintaining all other functional parameters.

25LC040A-E/P provides extended operating temperature range (-40°C ~ 125°C) with 10 MHz clock frequency operation. This part is specified for applications requiring operation at elevated ambient temperatures beyond the standard 85°C maximum.

Frequently Asked Questions (FAQ)

Q: Can 25LC040A-I/P directly replace 25LC040-I/P in existing designs? A: Yes. The 25LC040A-I/P maintains identical pin configuration, package type, memory capacity, and SPI interface protocol. The enhanced 10 MHz clock frequency is backward compatible with applications designed for 2 MHz operation.

Q: What is the primary difference between 25LC040A-I/P and 25AA040A-I/P? A: The 25AA040A-I/P supports extended supply voltage range (1.8V ~ 5.5V) compared to 25LC040A-I/P (2.5V ~ 5.5V). Both operate at 10 MHz clock frequency. Selection depends on minimum supply voltage requirements of the application.

Q: When should 25LC040A-E/P be selected over other substitutes? A: The 25LC040A-E/P is specified for applications requiring extended operating temperature range up to 125°C. Applications operating within standard temperature range (-40°C ~ 85°C) do not require this variant.

Q: Are all substitute parts available in the same packaging? A: Yes. All substitute parts are supplied in 8-DIP (0.300", 7.62mm) through-hole packaging, maintaining identical PCB footprint and mounting requirements.

Q: Do substitute parts maintain RoHS compliance? A: Yes. All substitute parts are ROHS3 compliant, matching the regulatory status of the original 25LC040-I/P.