AT34C02-10PI-2.5 Equivalent & Substitute Parts

Part Overview

The AT34C02-10PI-2.5 is a 2Kbit EEPROM memory IC with I2C interface operating at 400 kHz, manufactured by Microchip Technology. This component features 256 x 8 memory organization in an 8-DIP package and is classified as obsolete. Due to its obsolete status, direct replacement with active product alternatives is necessary for new designs and ongoing production requirements. Substitute parts maintain identical functional specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Memory Size	2Kbit
Memory Organization	256 x 8
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Write Cycle Time	10ms

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across memory capacity, interface protocol, electrical characteristics, and physical packaging. All substitute parts listed maintain the core functional parameters: 2Kbit capacity, I2C interface at 400 kHz, 256 x 8 organization, 900 ns access time, and 8-DIP through-hole package. Voltage supply range and operating temperature range define the operational envelope for direct substitution. Write cycle time variations (5ms versus 10ms) do not prevent substitution as faster write performance is backward compatible. All substitute parts are manufactured by Microchip Technology and are classified as active products with RoHS3 compliance.

Parameter Comparison

Part Number	Memory Size	Memory Organization	I2C Frequency	Access Time	Voltage Supply	Operating Temp	Write Cycle Time	Product Status	RoHS Status
AT34C02-10PI-2.5	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	10ms	Obsolete	Non-compliant
24AA024H-I/P	2Kbit	256 x 8	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24LC02B/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	0°C ~ 70°C	5ms	Active	ROHS3 Compliant
24LC024-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24LC025-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24LC02B-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24LC02BH-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	Active	ROHS3 Compliant
24LC22A-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	10ms	Active	ROHS3 Compliant
24LCS22A-I/P	2Kbit	256 x 8	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	10ms	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance, addressing the obsolete status of the AT34C02-10PI-2.5. Selection between substitutes depends on specific application requirements:

For applications requiring extended low-voltage operation, 24AA024H-I/P supports 1.7V minimum supply voltage compared to 2.5V for other alternatives. For applications with restricted operating temperature range, 24LC02B/P operates within 0°C to 70°C, narrower than the -40°C to 85°C range of other options. Parts with 5ms write cycle time (24AA024H-I/P, 24LC024-I/P, 24LC025-I/P, 24LC02B-I/P, 24LC02BH-I/P) provide faster write performance than the original 10ms specification. Parts maintaining 10ms write cycle time (24LC22A-I/P, 24LCS22A-I/P) match the original timing characteristics. All substitute parts maintain identical memory capacity, I2C interface frequency, access time, and 8-DIP package configuration.

Frequently Asked Questions (FAQ)

Q: Can 24LC02B-I/P directly replace AT34C02-10PI-2.5 in existing designs?

A: Yes. Both parts share identical memory capacity (2Kbit), memory organization (256 x 8), I2C interface frequency (400 kHz), access time (900 ns), and 8-DIP package. The 24LC02B-I/P is an active product with ROHS3 compliance, addressing the obsolete status of the original part.

Q: What is the difference between parts with 5ms and 10ms write cycle times?

A: Write cycle time defines the duration required to complete a single word or page write operation. Parts with 5ms write cycle time complete write operations faster than the original 10ms specification. Faster write performance is backward compatible with designs expecting 10ms timing.

Q: Does 24AA024H-I/P operate at lower voltages than other substitutes?

A: Yes. The 24AA024H-I/P supports a minimum supply voltage of 1.7V, while other substitutes require minimum 2.5V. This extended low-voltage range may be beneficial for battery-powered or low-power applications.

Q: Are all substitute parts available in the same 8-DIP package?

A: Yes. All substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical and electrical compatibility with existing PCB layouts.

Q: What is the operating temperature range difference between substitutes?

A: Most substitutes operate across -40°C to 85°C, matching the original part. The 24LC02B/P variant operates within a narrower range of 0°C to 70°C. Application requirements determine whether the restricted temperature range is acceptable.

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