AT24C1024-10PI-2.7 Equivalent & Substitute Parts

Part Overview

The AT24C1024-10PI-2.7 is a 1Mbit 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 2.7V to 5.5V. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain compatibility with the 8-DIP through-hole package, I2C interface protocol, and 1Mbit memory capacity while meeting the electrical and mechanical requirements of the original application.

Substiute Parts

AT24C1024-10PI-2.7

Microchip TechnologyIn Stock: 2305AT24C1024-10PI-2.7 Datasheet

Current PartRFQ

24AA1025-I/P

Microchip TechnologyIn Stock: 329824AA1025-I/P Datasheet

DirectRFQ

24FC1025-I/P

Microchip TechnologyIn Stock: 130924FC1025-I/P Datasheet

MFR RecommendedRFQ

24LC1026-I/P

Microchip TechnologyIn Stock: 302924LC1026-I/P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AT24C1024-10PI-2.7 are qualified based on the following criteria:

Core Compatibility Requirements:

• Memory capacity: 1Mbit (128K x 8 organization)
• Interface protocol: I2C
• Package: 8-DIP through-hole
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Through hole

Electrical Compatibility Criteria:

• Supply voltage range must encompass or be compatible with 2.7V ~ 5.5V
• Access time and clock frequency variations are acceptable provided the I2C protocol remains compatible
• Write cycle time differences do not affect substitution eligibility

The three substitute parts listed (24AA1025-I/P, 24FC1025-I/P, 24LC1026-I/P) meet all core compatibility requirements. Variations in clock frequency (400 kHz vs. 1 MHz) and access time do not prevent substitution, as these parameters remain within acceptable I2C protocol tolerances for the same memory capacity and organization.

Parameter Comparison

Engineering Selection Recommendations

24AA1025-I/P: This part is recommended for applications where lower supply voltage operation (1.7V minimum) is beneficial. It operates at 400 kHz clock frequency with 900 ns access time. The part is ROHS3 compliant and currently in active production status with 3240 units in stock. The extended lower voltage range provides design flexibility for battery-powered or low-voltage applications.

24FC1025-I/P: This part is the preferred substitute when 1 MHz clock frequency operation is required, matching the original AT24C1024-10PI-2.7 specification. It offers the fastest access time (400 ns) among the substitute options and maintains full I2C protocol compatibility. ROHS3 compliance and active product status support long-term availability. Supply voltage range begins at 1.8V, suitable for most standard applications.

24LC1026-I/P: This part operates at 400 kHz clock frequency with 900 ns access time and maintains a minimum supply voltage of 2.5V, closely aligned with the original part's 2.7V specification. ROHS3 compliance and active production status ensure continued availability. This option is suitable for applications where the original clock frequency is not critical.

All three substitute parts are manufactured by Microchip Technology, share identical package geometry, and maintain full I2C protocol compatibility with the AT24C1024-10PI-2.7.

Frequently Asked Questions (FAQ)

Q: Can I directly replace AT24C1024-10PI-2.7 with any of these substitute parts?

A: Yes, all three substitute parts are pin-compatible and functionally equivalent for I2C EEPROM applications. The 8-DIP package geometry is identical, and all parts support the same memory capacity (1Mbit, 128K x 8) and I2C interface protocol. Verify that your application's clock frequency requirements are met by the selected substitute.

Q: What is the difference between 1 MHz and 400 kHz clock frequency options?

A: Clock frequency determines the maximum I2C bus speed. The 1 MHz parts (AT24C1024-10PI-2.7 and 24FC1025-I/P) support faster data transfer rates. The 400 kHz parts (24AA1025-I/P and 24LC1026-I/P) operate at lower speeds but remain fully compatible with standard I2C bus implementations. Most applications function correctly with either frequency.

Q: Are there voltage supply compatibility concerns?

A: The original AT24C1024-10PI-2.7 operates from 2.7V to 5.5V. All substitute parts support this range or extend it. The 24AA1025-I/P extends the lower limit to 1.7V, while 24FC1025-I/P and 24LC1026-I/P support 1.8V and 2.5V minimums respectively. Verify your application's supply voltage falls within the selected part's specification.

Q: What does access time mean, and does it affect substitution?

A: Access time is the delay between an I2C read request and data availability. The original part specifies 550 ns. Substitute parts range from 400 ns to 900 ns. Faster access times (24FC1025-I/P at 400 ns) provide performance improvement. Slower access times (24AA1025-I/P and 24LC1026-I/P at 900 ns) remain compatible with standard I2C protocol timing requirements.

Q: Why is the original part obsolete?

A: The AT24C1024-10PI-2.7 is classified as obsolete by Microchip Technology. The three substitute parts are all in active production status, ensuring long-term availability and continued manufacturing support for new designs and production runs.

Q: Are all substitute parts RoHS compliant?

A: Yes, all three substitute parts (24AA1025-I/P, 24FC1025-I/P, 24LC1026-I/P) are ROHS3 compliant. The original AT24C1024-10PI-2.7 is RoHS non-compliant. Substitution with any of these parts upgrades the design to current RoHS compliance standards.