AT24C01BN-SH-T Equivalent & Substitute Parts

Part Overview

The AT24C01BN-SH-T is a 1Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz with 550 ns access time. This device is packaged in 8-SOIC surface mount configuration and operates across a wide voltage range of 1.8V to 5.5V with temperature range of -40°C to 85°C. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain core electrical compatibility while accommodating variations in clock frequency, access time, and operating temperature specifications.

Key Parameters

Parameter	AT24C01BN-SH-T
Memory Size	1Kbit
Memory Organization	128 x 8
Memory Interface	I2C
Clock Frequency	1 MHz
Access Time	550 ns
Write Cycle Time	5 ms
Voltage Supply Range	1.8V ~ 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
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the AT24C01BN-SH-T is determined by the following mandatory parameters:

Memory Size: Must be 1Kbit (128 x 8 organization)
Memory Interface: Must be I2C
Package / Case: Must be 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Must be Surface Mount
Memory Format: Must be EEPROM
Write Cycle Time: Must be 5 ms

Acceptable variations in substitute parts include:

Clock Frequency: Original operates at 1 MHz; substitutes may operate at 400 kHz (lower frequency acceptable for I2C protocol compatibility)
Access Time: Original is 550 ns; substitutes may range from 900 ns to 3500 ns (longer access times acceptable)
Voltage Supply Range: Original is 1.8V ~ 5.5V; substitutes may have narrower ranges (2.5V ~ 5.5V acceptable if application voltage falls within this range)
Operating Temperature: Original is -40°C ~ 85°C; substitutes may have different ranges including 0°C ~ 70°C or -40°C ~ 125°C
Product Status: Active parts are preferred over obsolete parts
Packaging Format: Tube, Tape & Reel (TR), or Cut Tape (CT) formats are acceptable

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temperature	Package	Product Status	Packaging Format
AT24C01BN-SH-T	Microchip Technology	1Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete	-
24AA014H-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tube
24AA01/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	1.7V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	Tube
24AA014HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
24AA014T-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
24AA01HT-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
24AA01T-I/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel (TR)
24AA01T/SN	Microchip Technology	1Kbit	400 kHz	3500 ns	1.7V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	Tape & Reel (TR)
24LC014-E/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active	Tube
24LC014-I/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tube
24LC014T-E/SN	Microchip Technology	1Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-SOIC	Active	Tape & Reel (TR)

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical and mechanical compatibility required for direct replacement of the AT24C01BN-SH-T. Selection among substitutes should be based on the following criteria:

Product Status: All substitute parts listed are in Active status, ensuring ongoing availability and manufacturing support compared to the obsolete AT24C01BN-SH-T.

Compliance & Certifications: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original part.

Voltage Supply Compatibility: Parts with 1.7V minimum supply (24AA series) provide superior low-voltage operation compared to the original 1.8V minimum. Parts with 2.5V minimum supply (24LC series) are suitable for applications operating above 2.5V. Verify application voltage requirements before selection.

Temperature Range Considerations:

Parts rated -40°C ~ 85°C (24AA014HT-I/SN, 24AA014T-I/SN, 24AA01HT-I/SN, 24AA01T-I/SN, 24LC014-I/SN) match the original temperature range
Parts rated 0°C ~ 70°C (24AA01/SN, 24AA01T/SN) are suitable for commercial temperature applications only
Parts rated -40°C ~ 125°C (24LC014-E/SN, 24LC014T-E/SN) provide extended high-temperature capability

Packaging Format:

Tape & Reel (TR) format is recommended for high-volume production
Tube format is suitable for lower-volume or maintenance applications
Cut Tape (CT) & Digi-Reel format provides flexibility for mixed-volume requirements

Clock Frequency: The original 1 MHz operation is reduced to 400 kHz in all substitutes. This reduction is compatible with I2C protocol specifications and does not impact functional performance in standard I2C applications.

Access Time: Extended access times (900 ns to 3500 ns) in substitutes are acceptable for I2C interface applications where timing margins are not critical.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz I2C EEPROM as a direct replacement for the 1 MHz AT24C01BN-SH-T?

A: Yes. The 400 kHz clock frequency is fully compatible with I2C protocol specifications. The original 1 MHz operation is not a requirement for functional compatibility; it represents a performance capability that is not necessary for standard I2C applications. All listed substitutes operate at 400 kHz and are electrically compatible.

Q: What is the difference between 24AA and 24LC series parts?

A: The primary difference is the minimum supply voltage. 24AA series parts operate from 1.7V minimum, while 24LC series parts require 2.5V minimum. Both series are 1Kbit I2C EEPROMs in 8-SOIC packaging. Select based on your application's minimum operating voltage requirement.

Q: Are Tape & Reel and Tube packaging formats interchangeable?

A: Yes, from an electrical and mechanical standpoint. Both formats contain identical die and package. The difference is in the delivery format: Tape & Reel is optimized for automated assembly lines, while Tube format is suitable for manual assembly or lower-volume applications. Verify your assembly equipment compatibility before ordering.

Q: Can I use a part rated 0°C ~ 70°C in an application requiring -40°C ~ 85°C operation?

A: No. Parts rated 0°C ~ 70°C (24AA01/SN, 24AA01T/SN) are not suitable for applications requiring operation below 0°C or above 70°C. Select parts with temperature ranges that fully encompass your application requirements. For -40°C ~ 85°C operation, use 24AA014HT-I/SN, 24AA014T-I/SN, 24AA01HT-I/SN, 24AA01T-I/SN, or 24LC014-I/SN.

Q: What does the access time specification mean, and does the difference between 550 ns and 900 ns matter?

A: Access time is the delay from when an address is presented until valid data appears on the output. The original 550 ns access time is faster than substitute parts at 900 ns or 3500 ns. For I2C interface applications, these differences do not impact functional performance because I2C protocol timing is controlled by the clock signal, not by device access time. Longer access times are acceptable.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original AT24C01BN-SH-T.

Q: Which substitute part should I choose for new designs?

A: For new designs, select from parts with Active product status. For applications requiring -40°C ~ 85°C operation with Tape & Reel packaging, 24AA014HT-I/SN or 24AA014T-I/SN are recommended. For applications with lower voltage requirements (1.7V minimum), 24AA series parts are preferred. For applications requiring extended temperature range to 125°C, 24LC014T-E/SN is suitable.

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