AT25128N-10SC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The AT25128N-10SC is a 128Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology in an 8-SOIC surface mount package. This device operates at 3 MHz clock frequency with a 4.5V to 5.5V supply voltage range and is rated for 0°C to 70°C operating temperature. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

AT25128N-10SC

Microchip TechnologyIn Stock: 1684AT25128N-10SC Datasheet

Current PartRFQ

CAT25128VI-G

onsemiIn Stock: 10479CAT25128VI-G Datasheet

DirectRFQ

BR25H128F-2CE2

Rohm SemiconductorIn Stock: 881BR25H128F-2CE2 Datasheet

MFR RecommendedRFQ

M95128-DFMN6TP

STMicroelectronicsIn Stock: 1624M95128-DFMN6TP Datasheet

MFR RecommendedRFQ

M95128-DRMN8TP/K

STMicroelectronicsIn Stock: 2446M95128-DRMN8TP/K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AT25128N-10SC is determined by the following critical parameters:

Core Compatibility Requirements:

• Memory capacity: 128Kbit
• Memory organization: 16K x 8
• Interface protocol: SPI
• Package footprint: 8-SOIC with 0.154" (3.90mm) width
• Surface mount technology

Electrical Compatibility Criteria:

• Supply voltage range must encompass or exceed the original 4.5V ~ 5.5V specification
• Clock frequency must meet or exceed 3 MHz minimum requirement
• Write cycle time must not exceed 5ms

Mechanical Compatibility:

• Package case must be 8-SOIC with matching 0.154" width to ensure PCB footprint compatibility

Substitute parts listed below meet all core compatibility requirements while offering enhanced performance characteristics in voltage range, clock frequency, or operating temperature ratings.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Identical Footprint):

CAT25128VI-G, M95128-DFMN6TP, and M95128-DRMN8TP/K are direct pin-compatible substitutes with matching 8-SOIC (0.154", 3.90mm) package dimensions. All three parts exceed the original 3 MHz clock frequency specification and maintain SPI interface compatibility. CAT25128VI-G and M95128-DFMN6TP are suitable for general industrial applications. M95128-DRMN8TP/K includes AEC-Q100 automotive qualification and extended operating temperature range (-40°C to 105°C), making it appropriate for automotive and harsh environment applications.

For Active Product Status with Enhanced Specifications:

M95128-DRMN8TP/K and BR25H128F-2CE2 are both active products with current manufacturing support. M95128-DRMN8TP/K offers automotive-grade qualification with AEC-Q100 certification. BR25H128F-2CE2 provides the widest operating temperature range (-40°C to 125°C) and automotive qualification, though it requires PCB layout adjustment due to slightly larger package width (0.173" vs. 0.154").

For RoHS3 Compliance:

All substitute parts listed are RoHS3 compliant, addressing environmental and regulatory requirements not met by the original AT25128N-10SC.

Frequently Asked Questions (FAQ)

Q: Can CAT25128VI-G be used as a direct replacement for AT25128N-10SC?

A: Yes. CAT25128VI-G is pin-compatible with identical 8-SOIC (0.154", 3.90mm) package dimensions, matching memory capacity (128Kbit), organization (16K x 8), and SPI interface. The substitute offers superior clock frequency (20 MHz vs. 3 MHz) and wider voltage range (1.8V ~ 5.5V vs. 4.5V ~ 5.5V), making it functionally compatible for the original application.

Q: What is the difference between M95128-DFMN6TP and M95128-DRMN8TP/K?

A: Both are STMicroelectronics M95128 EEPROM devices with identical memory specifications and SPI interface. M95128-DRMN8TP/K includes AEC-Q100 automotive qualification and supports extended operating temperature range (-40°C to 105°C) compared to M95128-DFMN6TP (-40°C to 85°C). M95128-DRMN8TP/K also features reduced write cycle time (4ms vs. 5ms). Select M95128-DRMN8TP/K for automotive applications or environments requiring wider temperature operation.

Q: Why is BR25H128F-2CE2 package width different (0.173" vs. 0.154")?

A: BR25H128F-2CE2 uses an 8-SOP package variant with 0.173" width compared to the standard 8-SOIC 0.154" width. While both are 8-pin surface mount packages with identical pin pitch and electrical compatibility, the slightly wider body requires PCB layout verification to ensure clearance from adjacent components. Pin-to-pin spacing and functionality remain compatible.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (CAT25128VI-G, BR25H128F-2CE2, M95128-DFMN6TP, and M95128-DRMN8TP/K) are RoHS3 compliant. The original AT25128N-10SC is RoHS non-compliant, making substitution necessary for applications requiring environmental compliance.

Q: Which substitute part is recommended for automotive applications?

A: M95128-DRMN8TP/K and BR25H128F-2CE2 both carry AEC-Q100 automotive qualification. M95128-DRMN8TP/K maintains the original 0.154" package width for direct PCB compatibility. BR25H128F-2CE2 offers the widest operating temperature range (-40°C to 125°C) but requires package width verification due to 0.173" dimension.

Q: Can the AT25128N-10SC operate at voltages below 4.5V?

A: No. The AT25128N-10SC supply voltage range is specified as 4.5V ~ 5.5V. Substitute parts CAT25128VI-G, M95128-DFMN6TP, and M95128-DRMN8TP/K support lower voltage operation (1.8V minimum), enabling use in low-power applications. BR25H128F-2CE2 supports 2.5V minimum supply voltage.