AT24C02BN-SH-T Equivalent & Substitute Parts

Part Overview

The AT24C02BN-SH-T is a 2Kbit EEPROM memory IC with I2C interface manufactured by Microchip Technology. This device operates at 1 MHz clock frequency with 550 ns access time and supports a supply voltage range of 1.8V to 5.5V. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the I2C interface, 2Kbit memory capacity, and 8-SOIC package while accommodating variations in clock frequency and access time specifications.

Key Parameters

Parameter	AT24C02BN-SH-T
Memory Size	2Kbit
Memory Organization	256 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 for the AT24C02BN-SH-T is determined by the following critical parameters:

Core Compatibility Requirements:

Memory Size: 2Kbit (256 x 8 organization)
Memory Interface: I2C
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Performance Tolerance Parameters:

Clock Frequency: 1 MHz (original) to 400 kHz (acceptable substitutes)
Access Time: 550 ns (original) to 900 ns (acceptable substitutes)
Write Cycle Time: 5 ms (consistent across all parts)
Voltage Supply Range: 1.8V ~ 5.5V (original) to 1.7V ~ 5.5V (acceptable)
Operating Temperature: -40°C ~ 85°C (original) to 0°C ~ 70°C (application-dependent)

All substitute parts listed maintain the same memory capacity, I2C interface, and 8-SOIC package. Variations in clock frequency and access time reflect different product lines within the Microchip 24AA and AT24C series, all of which are functionally compatible for I2C EEPROM applications. The primary distinction among substitutes is product status (active vs. obsolete) and packaging format (tube, tape & reel, or cut tape).

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Voltage Supply	Operating Temp	Package	Product Status	Packaging Format
AT24C02BN-SH-T	Microchip Technology	2Kbit	1 MHz	550 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Obsolete	N/A
24AA024H-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tube
24AA52-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tube
24AA02/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	Tube
24AA024HT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel
24AA024T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel
24AA025T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel
24AA02HT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel
24AA02T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Cut Tape & Digi-Reel
24AA02T/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.7V ~ 5.5V	0°C ~ 70°C	8-SOIC	Active	Tape & Reel
24AA52T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	1.8V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Active	Tape & Reel

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

For applications requiring the full -40°C to 85°C operating temperature range with extended voltage tolerance, select from: 24AA024HT-I/SN, 24AA024T-I/SN, 24AA025T-I/SN, 24AA02HT-I/SN, or 24AA52T-I/SN. These parts are active products with ROHS3 compliance and manufacturer verification status available. The 24AA024T-I/SN and 24AA02T-I/SN are verified for DiGi-Electronics programmability.

Secondary Substitutes (Temperature-Restricted):

For applications with operating temperature limits of 0°C to 70°C, 24AA02/SN and 24AA02T/SN are suitable alternatives. These parts maintain full I2C compatibility and ROHS3 compliance.

Packaging Considerations:

Tape & Reel (TR) format: 24AA024HT-I/SN, 24AA024T-I/SN, 24AA025T-I/SN, 24AA02HT-I/SN, 24AA02T-I/SN, 24AA02T/SN, 24AA52T-I/SN
Cut Tape (CT) & Digi-Reel: 24AA02T-I/SN
Tube format: 24AA024H-I/SN, 24AA52-I/SN, 24AA02/SN

All substitute parts are active products with current inventory availability, eliminating the obsolescence risk associated with the AT24C02BN-SH-T.

Frequently Asked Questions (FAQ)

Q: Can I use a 400 kHz I2C EEPROM as a direct replacement for the 1 MHz AT24C02BN-SH-T?

A: Yes. The 400 kHz substitute parts operate at a lower clock frequency but maintain full I2C protocol compatibility. The 900 ns access time of substitute parts is slower than the original 550 ns specification, but this does not prevent functional substitution in I2C applications. The I2C bus speed is determined by the master controller, not the slave device, so a 400 kHz-rated EEPROM functions correctly on I2C buses operating at 1 MHz or lower.

Q: What is the difference between 24AA02, 24AA024, and 24AA025 part numbers?

A: All three are 2Kbit I2C EEPROMs in 8-SOIC packages with identical memory organization (256 x 8) and electrical specifications. The numeric suffix indicates different product variants within the Microchip 24AA series. For substitution purposes, they are functionally equivalent.

Q: Does the voltage supply range difference (1.8V vs. 1.7V minimum) affect substitution?

A: The 1.7V minimum voltage of most substitute parts provides broader compatibility than the original 1.8V specification. Applications designed for 1.8V to 5.5V operation are fully compatible with 1.7V to 5.5V parts. If your application requires operation below 1.7V, verify the specific substitute part's datasheet.

Q: Which substitute part has the best availability?

A: 24AA02T-I/SN and 24AA024T-I/SN have the highest inventory levels (6,640 and 3,700 units respectively) and are verified for DiGi-Electronics programmability, making them preferred choices for new designs and production continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance of the original AT24C02BN-SH-T.

Q: What is the significance of the temperature range difference (0°C ~ 70°C vs. -40°C ~ 85°C)?

A: The original AT24C02BN-SH-T and most substitute parts operate across the industrial temperature range of -40°C to 85°C. Parts designated 24AA02/SN and 24AA02T/SN operate only from 0°C to 70°C, suitable for commercial-grade applications. Select the temperature-rated part matching your application environment.

Q: Can I mix packaging formats (tube, tape & reel, cut tape) in production?

A: Yes. Packaging format affects handling and assembly processes but does not alter electrical or functional characteristics. Select the packaging format compatible with your assembly equipment and supply chain requirements.

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