24AA01HT-I/SN EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24AA01HT-I/SN is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 400 kHz with 900 ns access time in an 8-SOIC surface mount package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are necessary to address inventory availability, packaging format requirements, or specific performance characteristics such as access time or supply voltage range variations across different manufacturing sources.

Key Parameters

Parameter	Value
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Supply Voltage Range	1.7V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24AA01HT-I/SN is determined by the following critical parameters:

Core Compatibility Parameters:

Memory Size: 1Kbit (128 x 8 organization)
Memory Interface: I2C protocol
Package Type: 8-SOIC surface mount configuration
Operating Temperature Range: -40°C ~ 85°C
RoHS3 Compliance: Required

Performance Variation Parameters:

Clock Frequency: 400 kHz (primary specification); 1 MHz variants acceptable for backward compatibility
Access Time: 900 ns (primary); 550 ns or 3500 ns variants acceptable depending on application timing requirements
Supply Voltage Range: Minimum 1.7V required; upper limit 5.5V standard

Packaging Format Variations:

Tape & Reel (TR): Original packaging
Cut Tape (CT) & Digi-Reel: Alternative packaging format
Bulk or Tube: Alternative packaging formats

Substitute parts must maintain identical memory capacity, I2C interface protocol, and 8-SOIC package footprint. Variations in access time, clock frequency, and supply voltage range are permissible when application requirements allow. All substitutes must maintain RoHS3 compliance and -40°C ~ 85°C operating temperature specification.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Package	Product Status	Packaging Format
24AA01HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-SOIC	Active	Tape & Reel (TR)
24AA01T-I/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	1.7V ~ 5.5V	8-SOIC	Active	Cut Tape (CT) & Digi-Reel
AT24CS01-SSHM-T	Microchip Technology	1Kbit	1 MHz	550 ns	1.7V ~ 5.5V	8-SOIC	Active	Cut Tape (CT) & Digi-Reel
24AA014HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	8-SOIC	Active	Tape & Reel (TR)
BR24L01AFJ-WE2	ROHM Semiconductor	1Kbit	400 kHz	Not Specified	1.8V ~ 5.5V	8-SOIC	Active	Tape & Reel (TR)
BR24T01F-WE2	Rohm Semiconductor	1Kbit	400 kHz	Not Specified	1.6V ~ 5.5V	8-SOIC	Active	Tape & Reel (TR)
M24C01-RMN6P	STMicroelectronics	1Kbit	400 kHz	900 ns	1.8V ~ 5.5V	8-SOIC	Active	Bulk
M24C01-RMN6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	1.8V ~ 5.5V	8-SOIC	Active	Cut Tape (CT) & Digi-Reel
M24C01-WMN6P	STMicroelectronics	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-SOIC	Not For New Designs	Tube
M24C01-WMN6TP	STMicroelectronics	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	8-SOIC	Not For New Designs	Cut Tape (CT) & Digi-Reel

Engineering Selection Recommendations

Primary Substitutes (Active Status, Recommended for New Designs):

The 24AA01T-I/SN, AT24CS01-SSHM-T, 24AA014HT-I/SN, M24C01-RMN6TP, and BR24L01AFJ-WE2 are all classified as Active products and are suitable for new design implementations. Selection among these should be based on packaging format availability and specific application timing requirements. The 24AA01T-I/SN and M24C01-RMN6TP offer verified programmability status. The AT24CS01-SSHM-T provides enhanced clock frequency at 1 MHz with faster 550 ns access time for applications requiring higher performance.

Secondary Substitutes (Active Status, Alternative Packaging):

The M24C01-RMN6P and BR24T01F-WE2 are Active products available in alternative packaging formats (Bulk and Tape & Reel respectively). These are suitable when specific packaging requirements or inventory constraints necessitate alternatives to the primary options.

Legacy Substitutes (Not For New Designs):

The M24C01-WMN6P and M24C01-WMN6TP are classified as Not For New Designs and should only be considered for legacy system maintenance or replacement scenarios. These parts feature a reduced supply voltage minimum of 2.5V, which may limit compatibility with lower-voltage applications.

Supply Voltage Considerations:

Applications requiring operation below 1.8V must use the 24AA01HT-I/SN, 24AA01T-I/SN, or AT24CS01-SSHM-T, which support 1.7V minimum supply voltage. The BR24T01F-WE2 supports the lowest minimum voltage at 1.6V. The ROHM BR24L01AFJ-WE2 and STMicroelectronics M24C01 series require minimum 1.8V or 2.5V respectively.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 24AA01HT-I/SN with the 24AA01T-I/SN?

A: Yes. Both parts are manufactured by Microchip Technology, feature identical 1Kbit I2C EEPROM memory in 8-SOIC package, and operate at 400 kHz with -40°C ~ 85°C temperature range. The primary difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and access time specification (900 ns versus 3500 ns). The 24AA01T-I/SN is suitable when slower access time is acceptable and Cut Tape packaging is preferred.

Q: What is the difference between the AT24CS01-SSHM-T and the 24AA01HT-I/SN?

A: The AT24CS01-SSHM-T operates at 1 MHz clock frequency with 550 ns access time, compared to the 24AA01HT-I/SN at 400 kHz and 900 ns. Both maintain 1Kbit capacity, I2C interface, 8-SOIC package, and 1.7V ~ 5.5V supply range. The AT24CS01-SSHM-T is suitable for applications requiring faster memory access performance.

Q: Are ROHM and STMicroelectronics parts compatible with the Microchip 24AA01HT-I/SN?

A: Yes, the BR24L01AFJ-WE2 (ROHM) and M24C01 series (STMicroelectronics) are functionally compatible. All maintain 1Kbit I2C EEPROM memory, 400 kHz operation, 8-SOIC package, and -40°C ~ 85°C temperature range. Verify supply voltage requirements: ROHM requires 1.8V minimum, STMicroelectronics M24C01-RMN6P/RMN6TP require 1.8V minimum, while M24C01-WMN6P/WMN6TP require 2.5V minimum.

Q: Can I use parts marked "Not For New Designs" in new applications?

A: No. Parts designated as "Not For New Designs" (M24C01-WMN6P and M24C01-WMN6TP) should only be used for legacy system maintenance or replacement. For new design implementations, select from parts with Active product status.

Q: What packaging formats are available?

A: Available packaging formats include Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, Bulk, and Tube. Selection depends on manufacturing and assembly requirements. Tape & Reel and Cut Tape formats are standard for automated assembly. Bulk and Tube formats are typically used for manual assembly or legacy processes.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts are RoHS3 compliant and meet REACH requirements. All parts are classified as REACH Unaffected with EAR99 export classification.

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