Equivalent & Substitute Parts for 25LC040AXT-E/ST

Part Overview

The 25LC040AXT-E/ST is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 10 MHz with 8-TSSOP surface mount packaging. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary to address inventory availability, packaging format requirements, operational frequency demands, or temperature range specifications for specific application requirements.

Substiute Parts

25LC040AXT-E/ST

Microchip TechnologyIn Stock: 104925LC040AXT-E/ST Datasheet

Current PartRFQ

AT25040B-XHL-B

Microchip TechnologyIn Stock: 2863AT25040B-XHL-B Datasheet

MFR RecommendedRFQ

AT25040B-XHL-T

Microchip TechnologyIn Stock: 18688AT25040B-XHL-T Datasheet

MFR RecommendedRFQ

CAV25040YE-GT3

onsemiIn Stock: 3705CAV25040YE-GT3 Datasheet

MFR RecommendedRFQ

M95040-DRDW3TP/K

STMicroelectronicsIn Stock: 18961M95040-DRDW3TP/K Datasheet

MFR RecommendedRFQ

M95040-DRDW8TP/K

STMicroelectronicsIn Stock: 4569M95040-DRDW8TP/K Datasheet

MFR RecommendedRFQ

M95040-RDW6TP

STMicroelectronicsIn Stock: 16047M95040-RDW6TP Datasheet

MFR RecommendedRFQ

M95040-WDW6TP

STMicroelectronicsIn Stock: 1544M95040-WDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 25LC040AXT-E/ST is determined by the following critical parameters:

Core Compatibility Requirements:

• Memory Size: 4Kbit (mandatory match)
• Memory Organization: 512 x 8 (mandatory match)
• Memory Interface: SPI (mandatory match)
• Package Type: 8-TSSOP (mandatory match)
• Mounting Type: Surface Mount (mandatory match)

Flexible Parameters (allowing substitution with operational differences):

• Clock Frequency: 10 MHz or higher (20 MHz substitutes are backward compatible)
• Voltage Supply Range: Must encompass or exceed 2.5V ~ 5.5V
• Operating Temperature: Must encompass or exceed -40°C ~ 125°C
• Write Cycle Time: 4ms or 5ms (both acceptable)
• Packaging Format: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or Tube formats are interchangeable for component selection

Substitute parts meeting these criteria are functionally equivalent for direct replacement in applications designed for the 25LC040AXT-E/ST.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Identical Operating Parameters): CAV25040YE-GT3 from onsemi matches the 25LC040AXT-E/ST across all critical operating parameters including 10 MHz clock frequency, 2.5V ~ 5.5V supply voltage, and -40°C ~ 125°C temperature range. This part carries AEC-Q100 automotive qualification and is suitable for applications requiring automotive-grade components.

Higher Frequency Substitutes (20 MHz Operation): AT25040B-XHL-T, M95040-DRDW3TP/K, M95040-DRDW8TP/K, M95040-RDW6TP, and M95040-WDW6TP all operate at 20 MHz, providing increased clock frequency capability. These parts are backward compatible with 10 MHz applications. M95040-DRDW3TP/K and M95040-DRDW8TP/K maintain the full -40°C ~ 125°C temperature range of the original part. M95040-DRDW3TP/K and M95040-DRDW8TP/K carry AEC-Q100 automotive qualification.

Packaging Format Considerations: AT25040B-XHL-T and M95040-DRDW3TP/K offer the highest inventory availability at 18647 Pcs and 18871 Pcs respectively. M95040-RDW6TP provides 15964 Pcs in Cut Tape & Digi-Reel® format. All substitute parts maintain the 8-TSSOP package footprint and surface mount compatibility.

Voltage Supply Compatibility: M95040-WDW6TP maintains the original 2.5V ~ 5.5V supply voltage range. All other substitutes extend the lower voltage limit to 1.8V, providing broader supply voltage compatibility.

Frequently Asked Questions (FAQ)

Q: Can AT25040B-XHL-T replace 25LC040AXT-E/ST in all applications? A: AT25040B-XHL-T is functionally compatible as a direct substitute. The 20 MHz clock frequency is backward compatible with 10 MHz designs. However, the operating temperature range is limited to -40°C ~ 85°C compared to the original -40°C ~ 125°C. Verify application temperature requirements before selection.

Q: What is the difference between M95040-DRDW3TP/K and M95040-DRDW8TP/K? A: Both parts operate at 20 MHz with 4ms write cycle time and carry AEC-Q100 qualification. M95040-DRDW3TP/K supports -40°C ~ 125°C operating temperature, while M95040-DRDW8TP/K is rated to -40°C ~ 105°C. M95040-DRDW3TP/K is supplied in Cut Tape & Digi-Reel® format with higher inventory (18871 Pcs), while M95040-DRDW8TP/K is in Tape & Reel format with 4532 Pcs available.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the 25LC040AXT-E/ST.

Q: Does packaging format affect electrical performance? A: No. Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Tube packaging formats do not affect electrical performance or functionality. Selection is based on assembly process requirements and inventory handling procedures.

Q: Which substitute offers the best temperature range coverage? A: CAV25040YE-GT3 and M95040-DRDW3TP/K both support -40°C ~ 125°C operating temperature, matching the original part's full temperature range. CAV25040YE-GT3 operates at 10 MHz, while M95040-DRDW3TP/K operates at 20 MHz.

Q: Can I use M95040-WDW6TP as a drop-in replacement? A: M95040-WDW6TP is electrically compatible with matching 2.5V ~ 5.5V supply voltage and 20 MHz operation. The operating temperature range is -40°C ~ 85°C. Verify that your application does not require operation above 85°C before selection.