Equivalent & Substitute Parts for 25C040-E/SN

Part Overview

The 25C040-E/SN is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 3 MHz with 8-SOIC surface mount packaging. This part is currently active in production with 5,150 units in stock inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory depletion occurs, or application requirements demand enhanced performance specifications such as higher clock frequency, extended temperature range, or automotive-grade qualification.

Substiute Parts

25C040-E/SN

Microchip TechnologyIn Stock: 522025C040-E/SN Datasheet

Current PartRFQ

25LC040A-E/SN

Microchip TechnologyIn Stock: 516025LC040A-E/SN Datasheet

MFR RecommendedRFQ

BR25H040F-2CE2

Rohm SemiconductorIn Stock: 1778BR25H040F-2CE2 Datasheet

MFR RecommendedRFQ

CAT25040VI-G

onsemiIn Stock: 721CAT25040VI-G Datasheet

MFR RecommendedRFQ

CAT25040VI-GT3

onsemiIn Stock: 49403CAT25040VI-GT3 Datasheet

MFR RecommendedRFQ

M95040-DRMN3TP/K

STMicroelectronicsIn Stock: 29820M95040-DRMN3TP/K Datasheet

MFR RecommendedRFQ

M95040-RMN6TP

STMicroelectronicsIn Stock: 1380M95040-RMN6TP Datasheet

MFR RecommendedRFQ

M95040-WMN6P

STMicroelectronicsIn Stock: 1746M95040-WMN6P Datasheet

MFR RecommendedRFQ

M95040-WMN6TP

STMicroelectronicsIn Stock: 45441M95040-WMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

• Memory Size: 4Kbit
• Memory Organization: 512 x 8
• Memory Interface: SPI
• Package / Case: 8-SOIC form factor
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Performance Parameters (May Exceed):

• Clock Frequency: May be equal to or higher than 3 MHz
• Write Cycle Time: May be equal to or lower than 5ms
• Voltage Supply Range: Must encompass or exceed 4.5V ~ 5.5V
• Operating Temperature: Must encompass or exceed -40°C ~ 125°C

All substitute parts listed meet the critical parameters. Performance enhancements in clock frequency, write cycle time, and voltage/temperature ranges represent forward compatibility without functional degradation.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Recommended):

• 25LC040A-E/SN: Same manufacturer (Microchip Technology), active product status, maintains full operating temperature range (-40°C ~ 125°C), enhanced clock frequency (10 MHz), and expanded lower voltage support (2.5V minimum).
• M95040-DRMN3TP/K: Active status with automotive-grade qualification (AEC-Q100), extended clock frequency (20 MHz), reduced write cycle time (4ms), and full temperature range support (-40°C ~ 125°C).

Tier 2 - Compatible Substitutes (Conditional):

• CAT25040VI-GT3: Active product status with high inventory availability (49,300 units), identical package dimensions, but reduced operating temperature range (-40°C ~ 85°C) and lower minimum voltage support (1.8V).
• M95040-WMN6TP: Active status with highest clock frequency (20 MHz), high inventory (45,390 units), but reduced operating temperature range (-40°C ~ 85°C).

Tier 3 - Not Recommended:

• CAT25040VI-G: Obsolete product status disqualifies from new design selection.
• BR25H040F-2CE2: Package case width (0.173", 4.40mm) differs from original specification (0.154", 3.90mm), creating potential PCB layout incompatibility.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the original 25C040-E/SN?

A: Yes. Higher clock frequency (10 MHz, 20 MHz) represents enhanced performance capability and maintains backward compatibility with applications designed for 3 MHz operation. The SPI interface remains identical.

Q: What is the significance of the voltage supply range difference between 25C040-E/SN (4.5V ~ 5.5V) and substitute parts offering 1.8V ~ 5.5V?

A: Substitute parts with lower minimum voltage (1.8V) provide expanded operational flexibility for low-power applications. However, if your circuit design requires 4.5V minimum operation, select substitutes that specify 2.5V or 4.5V minimum voltage to ensure compatibility with your power supply architecture.

Q: Why does BR25H040F-2CE2 have a different package width (0.173" vs 0.154")?

A: Although both are 8-SOIC packages, the width difference indicates a variant form factor. This may cause PCB footprint incompatibility. Verify PCB layout specifications before selection.

Q: Is automotive-grade qualification (AEC-Q100) required for my application?

A: AEC-Q100 qualification is mandatory only for automotive applications. M95040-DRMN3TP/K and BR25H040F-2CE2 carry this certification. For non-automotive applications, this qualification is not a selection requirement.

Q: What is the impact of reduced operating temperature range in CAT25040VI-GT3 (-40°C ~ 85°C vs -40°C ~ 125°C)?

A: The reduced upper temperature limit (85°C vs 125°C) restricts use in high-temperature environments. Select this part only if your application operates within -40°C ~ 85°C range. For extended temperature applications, choose 25LC040A-E/SN or M95040-DRMN3TP/K.

Q: Can I interchange M95040-WMN6TP and M95040-DRMN3TP/K?

A: Both are STMicroelectronics M95040 variants with identical memory specifications and 20 MHz clock frequency. Key differences: M95040-DRMN3TP/K supports full temperature range (-40°C ~ 125°C) and carries AEC-Q100 qualification; M95040-WMN6TP operates to 85°C maximum. Select based on temperature requirements and automotive qualification needs.