25LC020AT-E/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 25LC020AT-E/SN is a 2Kbit Serial Peripheral Interface (SPI) EEPROM memory IC manufactured by Microchip Technology, packaged in 8-SOIC surface mount configuration. This non-volatile memory device operates at 10 MHz clock frequency with a supply voltage range of 2.5V to 5.5V and supports operating temperatures from -40°C to 125°C. The part is currently active in production with 652 units in stock and carries ROHS3 compliance certification.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging or performance specifications better suit application requirements, or when design flexibility demands component options from multiple manufacturers while maintaining functional compatibility.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Write Cycle Time	5ms
Package Type	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 25LC020AT-E/SN is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: SPI protocol
Package Type: 8-SOIC form factor (0.154", 3.90mm width)
Voltage Supply Range: Minimum 2.5V support required
Operating Temperature: Minimum -40°C to 125°C range required

Secondary Flexibility Parameters:

Clock Frequency: 10 MHz or higher acceptable
Write Cycle Time: 5ms or faster acceptable
Manufacturer: Multiple qualified sources available

Substitute parts are grouped into three categories based on clock frequency performance: 5 MHz variants (legacy designs), 10 MHz variants (direct equivalents), and 20 MHz variants (enhanced performance). All qualified substitutes maintain identical memory capacity, SPI interface protocol, and 8-SOIC packaging to ensure pin-compatible board-level integration.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency (MHz)	Voltage Supply (V)	Operating Temp (°C)	Write Cycle (ms)	Package	Product Status
25LC020AT-E/SN	Microchip Technology	2Kbit	10	2.5 ~ 5.5	-40 ~ 125	5	8-SOIC	Active
AT25020B-SSHL-T	Microchip Technology	2Kbit	20	1.8 ~ 5.5	-40 ~ 85	5	8-SOIC	Active
BR25H020F-2CE2	Rohm Semiconductor	2Kbit	10	2.5 ~ 5.5	-40 ~ 125	4	8-SOP	Active
BR25H020F-2LBH2	Rohm Semiconductor	2Kbit	10	2.5 ~ 5.5	-40 ~ 125	4	8-SOP	Active
BR25L020FJ-WE2	Rohm Semiconductor	2Kbit	5	1.8 ~ 5.5	-40 ~ 85	5	8-SOP-J	Not For New Designs
CAT25020VI-G	onsemi	2Kbit	20	1.8 ~ 5.5	-40 ~ 85	5	8-SOIC	Discontinued
CAT25020VI-GT3	onsemi	2Kbit	Not Specified	1.8 ~ 5.5	-40 ~ 85	5	8-SOIC	Active
CAV25020VE-GT3	onsemi	2Kbit	10	2.5 ~ 5.5	-40 ~ 125	5	8-SOIC	Active
M95020-DRMN3TP/K	STMicroelectronics	2Kbit	20	1.8 ~ 5.5	-40 ~ 125	4	8-SOIC	Active
M95020-RMN6TP	STMicroelectronics	2Kbit	20	1.8 ~ 5.5	-40 ~ 85	5	8-SOIC	Active
M95020-WMN6P	STMicroelectronics	2Kbit	20	2.5 ~ 5.5	-40 ~ 85	5	8-SOIC	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes):

CAV25020VE-GT3 (onsemi) and BR25H020F-2CE2 or BR25H020F-2LBH2 (Rohm Semiconductor) provide the closest functional equivalence to the 25LC020AT-E/SN. These parts maintain identical 10 MHz clock frequency, 2Kbit capacity, SPI interface, and -40°C to 125°C operating temperature range. CAV25020VE-GT3 carries AEC-Q100 automotive qualification, matching the original part's extended temperature capability. Both Rohm variants feature 4ms write cycle time, improving upon the 5ms specification.

Enhanced Performance Alternatives:

M95020-DRMN3TP/K (STMicroelectronics) offers 20 MHz clock frequency with extended -40°C to 125°C temperature range and AEC-Q100 qualification. This part supports lower minimum supply voltage (1.8V) and delivers 4ms write cycle time. M95020-WMN6P provides 20 MHz performance with 2.5V minimum supply voltage matching the original specification.

Active Production Status Requirement:

Parts with Active product status are preferred for new designs. BR25L020FJ-WE2 carries "Not For New Designs" status and should be avoided in new applications. CAT25020VI-G is discontinued at DiGi Electronics and should not be selected for production designs.

Packaging Considerations:

All recommended substitutes maintain 8-SOIC surface mount packaging with 0.154" width, ensuring PCB-level compatibility. Rohm variants use 8-SOP designation with 0.173" width; verify PCB footprint compatibility before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25LC020AT-E/SN with a 20 MHz variant?

A: Yes. The 25LC020AT-E/SN operates at 10 MHz, but 20 MHz variants (M95020-DRMN3TP/K, M95020-RMN6P, M95020-WMN6TP, AT25020B-SSHL-T, CAT25020VI-G) are backward compatible. Higher clock frequency does not affect functionality in applications designed for 10 MHz operation. Verify that your SPI controller supports the higher frequency if upgrading.

Q: What is the difference between 8-SOIC and 8-SOP packaging?

A: Both are 8-pin surface mount packages with identical pin counts and SPI signal assignments. The primary difference is physical dimensions: 8-SOIC measures 0.154" width while 8-SOP measures 0.173" width. PCB footprints differ; verify your design accommodates the selected package before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original 25LC020AT-E/SN specification.

Q: Which substitute offers the widest operating temperature range?

A: The 25LC020AT-E/SN, CAV25020VE-GT3, BR25H020F-2CE2, BR25H020F-2LBH2, and M95020-DRMN3TP/K all support -40°C to 125°C operating temperature. Other variants are limited to -40°C to 85°C.

Q: Can I use a part with 1.8V minimum supply voltage if my design uses 2.5V?

A: Yes. Parts with 1.8V minimum supply voltage (AT25020B-SSHL-T, BR25L020FJ-WE2, CAT25020VI-GT3, M95020-DRMN3TP/K, M95020-RMN6TP) operate correctly at 2.5V and above. The lower minimum specification provides additional design flexibility without affecting performance at higher voltages.

Q: Is AEC-Q100 qualification required for my application?

A: AEC-Q100 qualification is required only for automotive applications. CAV25020VE-GT3, BR25H020F-2CE2, and M95020-DRMN3TP/K carry this certification. For non-automotive applications, qualification status does not affect component selection.

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