BR95040-WMN6TP EEPROM 4Kbit SPI Equivalent & Substitute Parts

Part Overview

The BR95040-WMN6TP is a 4Kbit EEPROM memory IC manufactured by Rohm Semiconductor, featuring SPI interface operation at 5 MHz with 512 x 8 memory organization. This device operates across a supply voltage range of 2.5V to 5.5V and supports operating temperatures from -40°C to 85°C in an 8-SOIC surface mount package.

The BR95040-WMN6TP is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this memory IC specification.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Organization	512 x 8
Memory Interface	SPI
Clock Frequency	5 MHz
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution compatibility for the BR95040-WMN6TP is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 4Kbit (fixed requirement)
Memory Organization: 512 x 8 (fixed requirement)
Memory Interface: SPI (fixed requirement)
Package Type: 8-SOIC form factor (fixed requirement)
Write Cycle Time: 5ms (fixed requirement)

Secondary Compatibility Criteria:

Clock Frequency: 5 MHz or higher (backward compatible)
Voltage Supply Range: Must encompass or exceed 2.5V ~ 5.5V
Operating Temperature: Must support -40°C ~ 85°C minimum
RoHS Compliance: ROHS3 Compliant

Substitute parts meeting all primary criteria and secondary criteria are electrically and mechanically interchangeable with the BR95040-WMN6TP. Parts with higher clock frequencies or wider voltage ranges provide enhanced performance margins. Parts with narrower voltage ranges or lower temperature ratings require application-level verification.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Voltage Supply	Operating Temperature	Package	Product Status
BR95040-WMN6TP	Rohm Semiconductor	4Kbit	5 MHz	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete
BR25L040FJ-WE2	Rohm Semiconductor	4Kbit	5 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Not For New Designs
25AA040-I/SN	Microchip Technology	4Kbit	1 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA040A-I/SN	Microchip Technology	4Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA040AT-I/SN	Microchip Technology	4Kbit	10 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25AA040T-I/SN	Microchip Technology	4Kbit	1 MHz	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25C040-E/SN	Microchip Technology	4Kbit	3 MHz	4.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
25C040-I/SN	Microchip Technology	4Kbit	3 MHz	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active
25C040/SN	Microchip Technology	4Kbit	3 MHz	4.5V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active
25C040T-E/SN	Microchip Technology	4Kbit	3 MHz	4.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active
25C040T-I/SN	Microchip Technology	4Kbit	3 MHz	4.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active

Engineering Selection Recommendations

Tier 1 - Direct Substitutes (Preferred): BR25L040FJ-WE2 (Rohm Semiconductor) provides the closest electrical match with identical 5 MHz clock frequency and matching temperature range. However, this part is classified as "Not For New Designs," limiting its suitability for long-term production. The extended voltage range (1.8V ~ 5.5V) provides additional design margin.

Tier 2 - Active Production Alternatives: The Microchip Technology 25AA040A-I/SN and 25AA040AT-I/SN offer 10 MHz clock frequency with active product status, providing performance headroom above the 5 MHz requirement. Both support the extended 1.8V ~ 5.5V voltage range and -40°C ~ 85°C operating temperature. Tape & Reel packaging (25AA040AT-I/SN) is suitable for automated assembly.

The 25C040 series (25C040-E/SN, 25C040T-E/SN, 25C040T-I/SN) operates at 3 MHz with active status. These parts require 4.5V minimum supply voltage, which may limit compatibility in applications requiring 2.5V operation. Extended temperature variants (-40°C ~ 125°C) are available.

Tier 3 - Limited Compatibility: 25AA040-I/SN and 25AA040T-I/SN operate at 1 MHz, below the 5 MHz specification. These parts are suitable only for applications where reduced clock frequency is acceptable. Both maintain active product status and support the full -40°C ~ 85°C temperature range.

25C040/SN operates within a narrower temperature range (0°C ~ 70°C) and is not suitable for applications requiring full -40°C ~ 85°C operation.

All recommended substitutes maintain ROHS3 compliance and MSL 1 rating consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a higher clock frequency than the BR95040-WMN6TP? A: Yes. The BR95040-WMN6TP operates at 5 MHz. Substitute parts with 10 MHz capability (25AA040A-I/SN, 25AA040AT-I/SN) are backward compatible and will function correctly in applications designed for 5 MHz operation. Higher clock frequency provides performance margin without affecting compatibility.

Q: What is the impact of voltage supply range differences? A: The BR95040-WMN6TP supports 2.5V ~ 5.5V. Substitutes with narrower ranges (such as 25C040 series at 4.5V ~ 5.5V) cannot operate at 2.5V and require application-level verification. Substitutes with extended ranges (1.8V ~ 5.5V) provide additional design flexibility and are fully compatible.

Q: Are all substitute parts available in 8-SOIC packaging? A: Yes. All listed substitute parts are specified in 8-SOIC (0.154", 3.90mm Width) surface mount package, ensuring mechanical and electrical compatibility with the original BR95040-WMN6TP footprint.

Q: What does "Not For New Designs" mean for the BR25L040FJ-WE2? A: This designation indicates the manufacturer is not recommending this part for new product development. While electrically compatible, it may have limited long-term availability. For new designs, active production alternatives such as the Microchip 25AA040A-I/SN series are preferred.

Q: Can I use 25C040/SN in applications requiring -40°C operation? A: No. The 25C040/SN operates only from 0°C ~ 70°C and cannot meet the -40°C ~ 85°C requirement of the BR95040-WMN6TP. Alternative 25C040 variants with extended temperature ranges (-40°C ~ 125°C) are available.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, consistent with the original BR95040-WMN6TP specification.

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