Equivalent & Substitute Parts for AT24C01A-10SC-1.8

Part Overview

The AT24C01A-10SC-1.8 is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 8-SOIC surface mount packaging. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and production continuity. The device operates across a supply voltage range of 1.8V to 5.5V with an access time of 900 ns and supports standard I2C communication protocols for embedded memory applications.

Substiute Parts

AT24C01A-10SC-1.8

Microchip TechnologyIn Stock: 5523AT24C01A-10SC-1.8 Datasheet

Current PartRFQ

24AA01/SN

Microchip TechnologyIn Stock: 4141124AA01/SN Datasheet

DirectRFQ

24AA01H-I/SN

Microchip TechnologyIn Stock: 216224AA01H-I/SN Datasheet

MFR RecommendedRFQ

24AA01T/SN

Microchip TechnologyIn Stock: 162924AA01T/SN Datasheet

MFR RecommendedRFQ

BR24L01AF-WE2

Rohm SemiconductorIn Stock: 28278BR24L01AF-WE2 Datasheet

MFR RecommendedRFQ

BR24T01F-WE2

Rohm SemiconductorIn Stock: 2958BR24T01F-WE2 Datasheet

MFR RecommendedRFQ

M24C01-RMN6P

STMicroelectronicsIn Stock: 14255M24C01-RMN6P Datasheet

MFR RecommendedRFQ

M24C01-RMN6TP

STMicroelectronicsIn Stock: 1915M24C01-RMN6TP Datasheet

MFR RecommendedRFQ

M24C01-WMN6P

STMicroelectronicsIn Stock: 10412M24C01-WMN6P Datasheet

MFR RecommendedRFQ

M24C01-WMN6TP

STMicroelectronicsIn Stock: 50609M24C01-WMN6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C01A-10SC-1.8 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Memory capacity: 1Kbit (128 x 8 organization)
• Interface protocol: I2C at 400 kHz
• Package type: 8-SOIC or equivalent footprint (8-SOP acceptable with mechanical verification)
• Write cycle time: 5 ms
• Supply voltage range: Must encompass or exceed 1.8V minimum
• Access time: 900 ns or faster acceptable

Secondary Considerations:

• Operating temperature range (extended range preferred for reliability)
• RoHS compliance status (ROHS3 compliant parts recommended for new designs)
• Product status (active parts preferred over obsolete or not-for-new-designs classifications)
• Packaging format (tube, tape & reel, or bulk availability)

Substitute parts are grouped by manufacturer and product status. All listed substitutes maintain electrical compatibility within the specified I2C EEPROM 1Kbit category while offering improved availability and compliance postures compared to the obsolete AT24C01A-10SC-1.8.

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Recommended Substitutes (Active Status, ROHS3 Compliant):

For applications requiring direct replacement with identical electrical performance and extended temperature range, 24AA01H-I/SN (Microchip) is the primary recommendation. This part maintains 900 ns access time matching the original specification, operates across -40°C to 85°C, and holds active product status with ROHS3 compliance. The 8-SOIC package is mechanically identical to the original AT24C01A-10SC-1.8.

For applications where access time relaxation is acceptable, 24AA01T/SN (Microchip) provides active status with ROHS3 compliance in tape & reel packaging, though access time extends to 3500 ns. This variant suits high-volume production environments.

Tier 2 - Alternative Substitutes (Active Status, Different Packaging):

M24C01-RMN6TP (STMicroelectronics) offers 900 ns access time, active product status, and ROHS3 compliance in cut tape & digi-reel format. This part maintains identical electrical specifications to the original while providing superior availability and compliance posture.

BR24L01AF-WE2 (Rohm Semiconductor) provides active status with ROHS3 compliance and extended temperature range (-40°C to 85°C). Package footprint is 8-SOP (0.173", 4.40mm width) versus the original 8-SOIC (0.154", 3.90mm width), requiring PCB layout verification before implementation.

Tier 3 - Legacy Alternatives (Not For New Designs):

M24C01-WMN6P and M24C01-WMN6TP (STMicroelectronics) maintain 900 ns access time and ROHS3 compliance but carry "Not For New Designs" status. These parts are suitable only for sustaining production of existing designs. Minimum supply voltage is 2.5V, restricting use in 1.8V applications.

Compliance Considerations:

All recommended Tier 1 and Tier 2 substitutes achieve ROHS3 compliance, addressing the non-compliance status of the obsolete AT24C01A-10SC-1.8. Selection should prioritize active product status to ensure long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can 24AA01/SN directly replace AT24C01A-10SC-1.8 in existing designs?

A: 24AA01/SN is electrically compatible as a 1Kbit I2C EEPROM with identical 400 kHz clock frequency and 5 ms write cycle time. However, access time extends from 900 ns to 3500 ns. This substitution is valid if system timing does not require sub-microsecond access performance. Both parts use 8-SOIC packaging with identical footprints.

Q: What is the difference between 24AA01H-I/SN and 24AA01T/SN?

A: Both are Microchip 1Kbit I2C EEPROMs with active status and ROHS3 compliance. The primary differences are: 24AA01H-I/SN offers 900 ns access time with extended temperature range (-40°C to 85°C) in tube packaging; 24AA01T/SN provides 3500 ns access time with standard temperature range (0°C to 70°C) in tape & reel packaging. Selection depends on thermal requirements and production volume needs.

Q: Are Rohm BR24L01AF-WE2 and BR24T01F-WE2 pin-compatible with the original part?

A: Both Rohm parts maintain I2C interface compatibility and 1Kbit capacity. However, package dimensions differ: Rohm parts use 8-SOP (0.173", 4.40mm width) versus the original 8-SOIC (0.154", 3.90mm width). While pin count and function are equivalent, PCB layout and footprint must be verified before substitution. Mechanical compatibility cannot be assumed without detailed package drawings.

Q: Why do M24C01-WMN6P and M24C01-WMN6TP carry "Not For New Designs" status?

A: These STMicroelectronics parts are classified as legacy components suitable only for sustaining existing production. Minimum supply voltage is 2.5V, restricting use in 1.8V applications where the original AT24C01A-10SC-1.8 operates. New designs should select from Tier 1 or Tier 2 alternatives with active product status.

Q: What supply voltage range should be verified when substituting parts?

A: The original AT24C01A-10SC-1.8 operates from 1.8V to 5.5V. Substitute parts must support the minimum voltage required by the application. 24AA01/SN and 24AA01H-I/SN support 1.7V minimum (acceptable for 1.8V systems). M24C01-WMN6P and M24C01-WMN6TP require 2.5V minimum and are unsuitable for 1.8V applications. BR24T01F-WE2 supports 1.6V minimum, providing additional margin.

Q: Is RoHS compliance mandatory for substitute selection?

A: The original AT24C01A-10SC-1.8 is RoHS non-compliant. All recommended substitutes achieve ROHS3 compliance, aligning with current environmental regulations and supply chain requirements. For new designs and ongoing production, ROHS3 compliant parts are strongly preferred to ensure regulatory compliance and long-term component availability.

Q: Can access time differences affect system functionality?

A: Access time specifies the delay from I2C address/command transmission to data availability. The original 900 ns specification is typical for I2C EEPROM devices. Substitutes with 3500 ns access time remain within standard I2C timing margins and do not typically impact system performance unless the application implements sub-microsecond data polling. System timing analysis should confirm compatibility for critical applications.