24LC044-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC044-E/ST is a 4Kbit I2C EEPROM memory IC manufactured by Microchip Technology, designed for non-volatile data storage applications requiring serial communication. This component operates across a wide supply voltage range of 2.5V to 5.5V and supports industrial temperature ranges from -40°C to 125°C. The device is actively produced and ROHS3 compliant, making it suitable for modern electronic applications. Substitute parts may be required due to inventory constraints, supply chain disruptions, or specific application requirements within the allowed electrical and mechanical parameter space.

Substiute Parts

24LC044-E/ST

Microchip TechnologyIn Stock: 115424LC044-E/ST Datasheet

Current PartRFQ

24LC04B-E/ST

Microchip TechnologyIn Stock: 606524LC04B-E/ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 24LC044-E/ST is permissible with the 24LC04B-E/ST based on the following criteria:

Matching Parameters (Required for Substitution):

• Memory Size: 4Kbit (identical)
• Memory Format: EEPROM (identical)
• Memory Organization: 256 x 8 x 2 (identical)
• Memory Interface: I2C (identical)
• Voltage Supply Range: 2.5V ~ 5.5V (identical)
• Operating Temperature: -40°C ~ 125°C (identical)
• Package Type: 8-TSSOP (identical)
• Mounting Type: Surface Mount (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Moisture Sensitivity Level: 1 (Unlimited) (identical)

Differing Parameters (Non-Critical for Substitution):

• Clock Frequency: 24LC044-E/ST operates at 1 MHz; 24LC04B-E/ST operates at 400 kHz
• Access Time: 24LC04B-E/ST specifies 900 ns
• Write Cycle Time: 24LC04B-E/ST specifies 5ms

The 24LC04B-E/ST operates at a lower clock frequency and has different timing characteristics, but maintains full functional compatibility within the I2C protocol specification and identical electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the 24LC044-E/ST and 24LC04B-E/ST are active products from Microchip Technology with identical ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on application-specific clock frequency requirements. The 24LC044-E/ST supports 1 MHz operation, while the 24LC04B-E/ST operates at 400 kHz. Both devices maintain identical supply voltage ranges, temperature ratings, and package specifications, ensuring mechanical and electrical compatibility in circuit designs. The 24LC04B-E/ST is verified as programmable through DiGi-Electronics, while the 24LC044-E/ST status is not verified.

Frequently Asked Questions (FAQ)

Q: Can the 24LC04B-E/ST directly replace the 24LC044-E/ST in existing designs?

A: Yes, the 24LC04B-E/ST is a direct substitute for the 24LC044-E/ST. Both devices share identical memory capacity, organization, I2C interface, supply voltage range, operating temperature range, and 8-TSSOP package specifications. The primary difference is clock frequency: 24LC044-E/ST operates at 1 MHz while 24LC04B-E/ST operates at 400 kHz. Applications requiring higher clock speeds should retain the 24LC044-E/ST.

Q: Are there any package or pinout differences between these parts?

A: No. Both the 24LC044-E/ST and 24LC04B-E/ST use the identical 8-TSSOP package with 0.173" width and 4.40mm dimensions. Pinout and mechanical compatibility are fully maintained.

Q: What are the compliance and certification differences?

A: Both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both devices. No compliance barriers exist for substitution.

Q: How do the timing specifications differ?

A: The 24LC044-E/ST operates at 1 MHz clock frequency. The 24LC04B-E/ST operates at 400 kHz with 900 ns access time and 5ms write cycle time. Applications with strict timing requirements should verify compatibility with the lower clock frequency of the 24LC04B-E/ST before substitution.

Q: Are both parts currently in production?

A: Yes. Both the 24LC044-E/ST and 24LC04B-E/ST maintain active product status from Microchip Technology, ensuring continued availability and support.