Equivalent & Substitute Parts for AT34C02CN-SH-T

Part Overview

The AT34C02CN-SH-T is a 2Kbit 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 part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing design support and production continuity. The electrical and mechanical parameters of this device establish the baseline criteria for determining compatible alternatives from the current product portfolio.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply 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 AT34C02CN-SH-T is determined by strict equivalence across the following critical parameters: memory size (2Kbit), memory organization (256 x 8), I2C interface protocol, package type (8-SOIC), and surface mount configuration. The clock frequency of 400 kHz and access time of 900 ns define the baseline performance specification. Voltage supply range (1.7V ~ 5.5V) and operating temperature range (-40°C ~ 85°C) establish the environmental operating envelope. All substitute parts must maintain these electrical and mechanical specifications to ensure functional compatibility without circuit redesign.

Substitute parts are categorized as follows:

Direct Substitutes (400 kHz Operation): Parts maintaining identical clock frequency and access time specifications, suitable for direct replacement in existing designs.

Upgrade Substitutes (Extended Temperature Range): Parts with enhanced operating temperature range (-40°C ~ 125°C) providing improved thermal performance while maintaining core electrical parameters.

Performance Upgrades (1 MHz Operation): Parts with increased clock frequency (1 MHz) and improved access time (550 ns), offering enhanced performance characteristics while preserving package and interface compatibility.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Operating Temperature	Package	Product Status	Inventory
AT34C02CN-SH-T	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Obsolete	1390 Pcs
24AA02-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Active	36647 Pcs
24AA024H-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Active	1611 Pcs
34AA02-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Active	769 Pcs
34AA02-E/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 125°C	8-SOIC	Active	2128 Pcs
34AA02T-E/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 125°C	8-SOIC	Active	802 Pcs
AT24CS02-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	-40°C ~ 85°C	8-SOIC	Active	3850 Pcs
AT24HC02C-SSHM-T	Microchip Technology	2Kbit	1 MHz	550 ns	-40°C ~ 85°C	8-SOIC	Active	1488 Pcs
AT34C02D-SSHM-T	Microchip Technology	2Kbit	1 MHz	N/A	-40°C ~ 85°C	8-SOIC	Active	7208 Pcs
24AA024HT-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Active	703 Pcs
24AA024T-I/SN	Microchip Technology	2Kbit	400 kHz	900 ns	-40°C ~ 85°C	8-SOIC	Active	3700 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select 24AA02-I/SN, 24AA024H-I/SN, 34AA02-I/SN, 24AA024HT-I/SN, or 24AA024T-I/SN. These parts maintain 400 kHz clock frequency, 900 ns access time, and -40°C ~ 85°C operating temperature range. All are active products with ROHS3 compliance and REACH unaffected status. The 24AA02-I/SN offers the highest inventory availability (36647 Pcs).

For Extended Temperature Applications: Select 34AA02-E/SN or 34AA02T-E/SN. These parts extend the operating temperature range to -40°C ~ 125°C while preserving all other electrical parameters. Both maintain ROHS3 compliance and active product status.

For Enhanced Performance Requirements: Select AT24CS02-SSHM-T, AT24HC02C-SSHM-T, or AT34C02D-SSHM-T. These parts operate at 1 MHz clock frequency with 550 ns access time, providing improved performance margins. All are active products with ROHS3 compliance. AT34C02D-SSHM-T offers the highest inventory (7208 Pcs) and is verified as DiGi-Electronics programmable.

All recommended substitutes maintain the 8-SOIC package configuration, I2C interface protocol, 2Kbit memory capacity, and 1.7V ~ 5.5V supply voltage range of the original part.

Frequently Asked Questions (FAQ)

Q: Can 24AA02-I/SN be used as a direct replacement for AT34C02CN-SH-T?

A: Yes. Both parts share identical electrical specifications: 2Kbit capacity, 256 x 8 organization, I2C interface, 400 kHz clock frequency, 900 ns access time, 5ms write cycle time, 1.7V ~ 5.5V supply voltage, and -40°C ~ 85°C operating temperature. Both use 8-SOIC surface mount packaging. The 24AA02-I/SN is an active product with higher inventory availability.

Q: What is the difference between 34AA02-I/SN and 34AA02-E/SN?

A: The primary difference is operating temperature range. The 34AA02-I/SN operates from -40°C ~ 85°C, while the 34AA02-E/SN extends to -40°C ~ 125°C. All other electrical parameters remain identical. Select the -E/SN variant for applications requiring enhanced thermal performance.

Q: Are the 1 MHz parts (AT24CS02-SSHM-T, AT24HC02C-SSHM-T, AT34C02D-SSHM-T) compatible with designs specified for 400 kHz operation?

A: Yes, from an electrical compatibility standpoint. These parts maintain the same 2Kbit capacity, 256 x 8 organization, I2C interface, 1.7V ~ 5.5V supply voltage, and 8-SOIC package. The increased clock frequency (1 MHz) and improved access time (550 ns) provide performance headroom. However, verify that your I2C bus controller supports 1 MHz operation if clock frequency is a design constraint.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in multiple packaging formats: Tube (24AA02-I/SN, 24AA024H-I/SN, 34AA02-I/SN, 34AA02-E/SN), Tape & Reel (34AA02T-E/SN, 24AA024HT-I/SN, 24AA024T-I/SN), and Cut Tape with Digi-Reel (AT24CS02-SSHM-T, AT24HC02C-SSHM-T, AT34C02D-SSHM-T). All maintain the 8-SOIC surface mount package configuration.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of the original AT34C02CN-SH-T.

Q: Which substitute offers the best inventory availability?

A: The 24AA02-I/SN provides the highest inventory with 36647 Pcs in stock, followed by AT34C02D-SSHM-T with 7208 Pcs and 24AA024T-I/SN with 3700 Pcs.

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