Equivalent & Substitute Parts for 602-00032 EEPROM Memory IC 256Kbit I2C 8-DIP

Part Overview

The Parallax Inc. 602-00032 is a 256Kbit EEPROM memory integrated circuit with I2C interface in 8-DIP packaging. This part is classified as obsolete, making equivalent and substitute components necessary for ongoing design support and production continuity. The part operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 85°C.

Substiute Parts

602-00032

Parallax Inc.In Stock: 1069602-00032 Datasheet

Current PartRFQ

24AA256-E/P

Microchip TechnologyIn Stock: 121424AA256-E/P Datasheet

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24AA256-I/P

Microchip TechnologyIn Stock: 2011724AA256-I/P Datasheet

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24AA256UID-I/P

Microchip TechnologyIn Stock: 127224AA256UID-I/P Datasheet

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24FC256-I/P

Microchip TechnologyIn Stock: 449924FC256-I/P Datasheet

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24LC256-E/P

Microchip TechnologyIn Stock: 269224LC256-E/P Datasheet

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24LC256-I/P

Microchip TechnologyIn Stock: 448724LC256-I/P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 602-00032 are classified based on electrical and mechanical parameter compatibility:

Direct Substitutes (Identical Electrical Parameters): Parts that match all critical parameters including memory size (256Kbit), I2C interface, clock frequency (400 kHz), access time (900 ns), write cycle time (5 ms), package type (8-DIP), and operating temperature range (-40°C to 85°C).

Compatible Substitutes (Extended Voltage or Temperature Range): Parts that maintain identical memory specifications and interface characteristics but offer extended supply voltage range (1.7V ~ 5.5V) or extended operating temperature range (-40°C to 125°C), providing broader application flexibility.

Enhanced Performance Substitutes (Higher Clock Frequency): Parts that maintain 256Kbit memory capacity and I2C interface but operate at 1 MHz clock frequency with 400 ns access time, enabling faster data transfer while maintaining backward compatibility through I2C protocol.

Key Parameters for Substitution Determination: Memory Size, Memory Organization, Memory Interface (I2C), Package Type (8-DIP), Mounting Type (Through Hole), Write Cycle Time, and Moisture Sensitivity Level must remain constant. Voltage supply range, operating temperature range, and clock frequency may be extended or enhanced without compromising compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications: The 24LC256-I/P offers the closest electrical and mechanical match to the 602-00032, maintaining identical memory capacity, I2C interface, clock frequency, access time, voltage supply range (2.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). This part is manufactured by Microchip Technology with Active product status and verified programmability certification. The 24LC256-I/P is available in high inventory (4400 pcs) and carries ROHS3 compliance.

For Extended Operating Temperature Range: The 24AA256-E/P and 24LC256-E/P both extend the upper operating temperature limit to 125°C while maintaining all other electrical parameters. The 24AA256-E/P offers extended lower voltage operation (1.7V minimum), whereas the 24LC256-E/P maintains the original 2.5V minimum voltage specification. Both are Active status components with ROHS3 compliance.

For Extended Voltage Supply Range: The 24AA256-I/P and 24AA256UID-I/P support supply voltages from 1.7V to 5.5V, enabling operation in lower-voltage applications while maintaining identical memory specifications and I2C interface characteristics. Both are Active status with ROHS3 compliance.

For Enhanced Performance Applications: The 24FC256-I/P operates at 1 MHz I2C clock frequency with 400 ns access time, providing 2.5x faster data transfer compared to the 602-00032. This part maintains 256Kbit capacity, 8-DIP package, and I2C protocol compatibility. The 24FC256-I/P is suitable for applications requiring higher data throughput and is available in high inventory (4400 pcs) with Active status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 24AA256-I/P directly replace the 602-00032 in existing designs?

A: The 24AA256-I/P is electrically compatible with the 602-00032 for I2C communication, memory capacity, and package footprint. However, the 24AA256-I/P supports lower minimum supply voltage (1.7V vs. 2.5V). If your design operates at 2.5V or higher, this part is compatible. The 24LC256-I/P maintains identical voltage specifications (2.5V ~ 5.5V) and is the preferred direct replacement.

Q: What is the difference between 24AA256 and 24LC256 series?

A: Both series are 256Kbit I2C EEPROM devices with identical memory organization and interface specifications. The primary difference is the minimum supply voltage: 24AA256 operates from 1.7V, while 24LC256 operates from 2.5V. The 24FC256 variant operates at higher I2C clock frequency (1 MHz vs. 400 kHz).

Q: Is the 24FC256-I/P backward compatible with designs using the 602-00032?

A: The 24FC256-I/P is I2C protocol compatible and maintains identical memory capacity and 8-DIP package. The higher clock frequency (1 MHz vs. 400 kHz) and faster access time (400 ns vs. 900 ns) do not create incompatibility. Existing I2C bus configurations will operate with the 24FC256-I/P at the lower clock frequency if required.

Q: Are all substitute parts ROHS3 compliant?

A: All Microchip Technology substitute parts listed (24AA256 series, 24LC256 series, and 24FC256-I/P) carry ROHS3 compliance certification. The original 602-00032 does not specify ROHS status.

Q: What is the significance of the temperature grade suffix (-E/P vs. -I/P)?

A: The suffix indicates the operating temperature range. The -I/P grade operates from -40°C to 85°C (industrial range). The -E/P grade extends the upper limit to -40°C to 125°C (extended industrial range). Select based on your application's thermal requirements.

Q: Can I use 24AA256UID-I/P as a substitute?

A: The 24AA256UID-I/P is electrically and mechanically compatible with the 602-00032. The "UID" designation indicates unique identification features. This part is suitable for applications requiring device identification or tracking capabilities while maintaining standard I2C EEPROM functionality.

Q: What inventory levels are available for these substitute parts?

A: Current inventory includes: 24AA256-E/P (1155 pcs), 24AA256-I/P (20100 pcs), 24AA256UID-I/P (1168 pcs), 24FC256-I/P (4400 pcs), 24LC256-E/P (2624 pcs), and 24LC256-I/P (4400 pcs). The 24AA256-I/P offers the highest availability.