Equivalent & Substitute Parts for 24AA01/SN

Part Overview

The 24AA01/SN is a 1Kbit EEPROM memory integrated circuit manufactured by Microchip Technology, designed for I2C serial communication applications operating at 400 kHz. This non-volatile memory device features 128 x 8 bit organization in an 8-SOIC surface mount package and operates across a supply voltage range of 1.7V to 5.5V with an operating temperature range of 0°C to 70°C.

The 24AA01/SN is classified as an active product with verified programmability status. Substitute parts become necessary when the original part number is unavailable, when extended temperature range operation is required, when higher clock frequency performance is needed, or when alternative packaging formats are preferred for specific manufacturing processes.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	3500 ns
Write Cycle Time	5 ms
Supply Voltage Range	1.7V ~ 5.5V
Operating Temperature	0°C ~ 70°C
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 24AA01/SN is determined by the following critical parameters:

Core Functional Parameters:

Memory capacity of 1Kbit with 128 x 8 organization
I2C serial interface protocol
Non-volatile EEPROM technology
5 ms write cycle time

Electrical Compatibility Parameters:

Supply voltage range must encompass or be compatible with 1.7V ~ 5.5V
Clock frequency of 400 kHz or higher
Access time specifications

Physical Compatibility Parameters:

8-pin SOIC or equivalent surface mount package
Package width tolerance of 0.154" to 0.173" (3.90mm to 4.40mm)

Compliance Parameters:

ROHS3 compliance
REACH unaffected status
EAR99 classification

Substitute parts are grouped into three categories: direct functional equivalents with identical specifications, enhanced performance variants with faster access times or higher clock frequencies, and alternative manufacturer equivalents with compatible electrical and mechanical characteristics.

Parameter Comparison

Parameter	24AA01/SN	24AA01-I/SN	24AA014H-I/SN	AT24CS01-SSHM-T	BR24T01F-WE2	M24C01-WMN6TP
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology	Rohm Semiconductor	STMicroelectronics
Memory Size	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit	1Kbit
Memory Organization	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8	128 x 8
Memory Interface	I2C	I2C	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	1 MHz	400 kHz	400 kHz
Access Time	3500 ns	3500 ns	900 ns	550 ns	Not Specified	900 ns
Write Cycle Time	5 ms	5 ms	5 ms	5 ms	5 ms	5 ms
Supply Voltage Range	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.7V ~ 5.5V	1.6V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOIC (0.154", 3.90mm)	8-SOP (0.173", 4.40mm)	8-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Not For New Designs
DiGi-Electronics Programmable	Verified	Verified	Not Verified	Not Verified	Not Verified	Verified

Engineering Selection Recommendations

Primary Substitute: 24AA01-I/SN

The 24AA01-I/SN is the direct functional equivalent manufactured by Microchip Technology. This part maintains identical electrical specifications including 1Kbit capacity, 128 x 8 organization, 400 kHz I2C operation, and 3500 ns access time. The primary distinction is the extended operating temperature range of -40°C to 85°C compared to the 0°C to 70°C range of the 24AA01/SN. Both parts feature verified programmability status and ROHS3 compliance. The 24AA01-I/SN is suitable for applications requiring wider temperature operation without performance degradation.

Enhanced Performance Substitute: 24AA014H-I/SN

The 24AA014H-I/SN offers improved access time performance of 900 ns compared to the 3500 ns specification of the 24AA01/SN, while maintaining all other functional parameters including 1Kbit capacity, 400 kHz I2C operation, and 5 ms write cycle time. This part extends the operating temperature range to -40°C to 85°C. The 24AA014H-I/SN is classified as active but with unverified programmability status. Selection of this part is appropriate when faster data access is required within the same I2C clock frequency specification.

High-Speed Substitute: AT24CS01-SSHM-T

The AT24CS01-SSHM-T, manufactured by Microchip Technology, provides enhanced clock frequency operation at 1 MHz with corresponding access time of 550 ns. This part maintains 1Kbit capacity and 128 x 8 organization with identical supply voltage range and extended operating temperature of -40°C to 85°C. The AT24CS01-SSHM-T is supplied in Cut Tape and Digi-Reel packaging format. This part is suitable for applications requiring higher I2C bus speeds while maintaining functional compatibility.

Alternative Manufacturer Substitute: BR24T01F-WE2

The BR24T01F-WE2, manufactured by Rohm Semiconductor, provides equivalent 1Kbit EEPROM functionality with 400 kHz I2C operation and 128 x 8 organization. This part features a slightly wider 8-SOP package (0.173", 4.40mm width) compared to the standard 8-SOIC (0.154", 3.90mm width) and operates across 1.6V to 5.5V supply voltage range with -40°C to 85°C temperature range. The BR24T01F-WE2 is supplied in Tape and Reel packaging. Package width variation requires PCB layout verification before selection.

Legacy Substitute: M24C01-WMN6TP

The M24C01-WMN6TP, manufactured by STMicroelectronics, provides 1Kbit EEPROM functionality with 400 kHz I2C operation and 900 ns access time. This part is classified as "Not For New Designs" and features a restricted supply voltage range of 2.5V to 5.5V compared to the 1.7V minimum of the 24AA01/SN. The M24C01-WMN6TP maintains ROHS3 compliance and verified programmability status. Selection of this part is limited to legacy system maintenance or replacement applications where existing designs already incorporate this component.

Frequently Asked Questions (FAQ)

Q: Can the 24AA01-I/SN be used as a direct replacement for the 24AA01/SN?

A: Yes. The 24AA01-I/SN is functionally equivalent with identical memory capacity, organization, I2C interface, clock frequency, and access time specifications. The extended operating temperature range of -40°C to 85°C provides additional operational margin compared to the 0°C to 70°C specification of the 24AA01/SN. Both parts are ROHS3 compliant with verified programmability status.

Q: What is the difference between the 24AA014H-I/SN and the 24AA01/SN?

A: The 24AA014H-I/SN provides faster access time of 900 ns compared to 3500 ns in the 24AA01/SN. Both parts operate at 400 kHz I2C frequency with identical 1Kbit capacity and 5 ms write cycle time. The 24AA014H-I/SN extends the operating temperature range to -40°C to 85°C. The 24AA014H-I/SN is suitable when faster data retrieval is required within the same I2C bus speed.

Q: Is the AT24CS01-SSHM-T compatible with 400 kHz I2C systems?

A: Yes. The AT24CS01-SSHM-T operates at 1 MHz I2C frequency, which is backward compatible with 400 kHz I2C systems. The part will function correctly when operated at lower clock frequencies. The 1 MHz capability provides additional performance headroom for applications that require higher bus speeds.

Q: Can the BR24T01F-WE2 be used in place of the 24AA01/SN without PCB modifications?

A: The BR24T01F-WE2 requires evaluation of package compatibility. While both parts are 8-pin surface mount devices, the BR24T01F-WE2 uses an 8-SOP package with 0.173" width compared to the 8-SOIC package with 0.154" width of the 24AA01/SN. PCB footprint verification is necessary to confirm mechanical compatibility before substitution.

Q: Why is the M24C01-WMN6TP marked as "Not For New Designs"?

A: The M24C01-WMN6TP is classified as "Not For New Designs" by STMicroelectronics, indicating that the manufacturer is not recommending this part for new product development. This part is suitable only for legacy system maintenance or replacement of existing components in fielded systems. New designs should utilize the 24AA01-I/SN or alternative active-status parts.

Q: What is the minimum supply voltage requirement for each substitute part?

A: The 24AA01/SN, 24AA01-I/SN, 24AA014H-I/SN, and AT24CS01-SSHM-T all operate at 1.7V minimum supply voltage. The BR24T01F-WE2 operates at 1.6V minimum. The M24C01-WMN6TP requires 2.5V minimum supply voltage, which is a significant limitation for low-voltage applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts including 24AA01-I/SN, 24AA014H-I/SN, AT24CS01-SSHM-T, BR24T01F-WE2, and M24C01-WMN6TP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute part offers the fastest access time?

A: The AT24CS01-SSHM-T provides the fastest access time of 550 ns, followed by the 24AA014H-I/SN and M24C01-WMN6TP at 900 ns. The 24AA01/SN and 24AA01-I/SN both specify 3500 ns access time. Selection depends on application timing requirements and I2C bus speed capabilities.

Q: What packaging formats are available for the substitute parts?

A: The 24AA01-I/SN and 24AA014H-I/SN are supplied in Tube packaging. The AT24CS01-SSHM-T and M24C01-WMN6TP are supplied in Cut Tape and Digi-Reel format. The BR24T01F-WE2 is supplied in Tape and Reel format. Packaging selection affects manufacturing process compatibility and component handling requirements.

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