24LC044T-I/SN EEPROM Equivalent & Substitute Parts

Part Overview

The 24LC044T-I/SN is a 4Kbit I2C EEPROM memory IC manufactured by Microchip Technology, operating at 1 MHz clock frequency in an 8-SOIC surface mount package. This device is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part becomes unavailable, when supply chain constraints require alternative sourcing, or when design flexibility permits operation at reduced clock frequencies while maintaining core memory functionality and electrical compatibility.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Organization	256 x 8 x 2
Memory Interface	I2C
Clock Frequency	1 MHz
Voltage Supply Range	2.5V ~ 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 of the 24LC044T-I/SN is determined by the following critical parameters:

Memory Capacity: All substitute parts must provide 4Kbit storage with 256 x 8 x 2 organization
Interface Protocol: I2C interface is mandatory for system compatibility
Package Compatibility: 8-SOIC surface mount package with identical 0.154" (3.90mm) width
Voltage Supply Range: Substitute parts must operate within or encompass the 2.5V ~ 5.5V supply range
Operating Temperature Range: Substitute parts must support at minimum -40°C ~ 85°C operation
RoHS Compliance: All substitute parts maintain ROHS3 compliance status

The 24LC044T-I/SN operates at 1 MHz clock frequency. Substitute parts operating at 400 kHz provide reduced bandwidth but maintain full functional compatibility for I2C EEPROM applications where clock speed is not a limiting factor. All listed substitutes meet the mandatory electrical and mechanical parameters for direct replacement.

Parameter Comparison

Parameter	24LC044T-I/SN	24AA04T-I/SN	24LC04BHT-I/SN	24LC04BT-E/SN	24LC04BT-I/SN
Memory Size	4Kbit	4Kbit	4Kbit	4Kbit	4Kbit
Memory Organization	256 x 8 x 2	256 x 8 x 2	256 x 8 x 2	256 x 8 x 2	256 x 8 x 2
Memory Interface	I2C	I2C	I2C	I2C	I2C
Clock Frequency	1 MHz	400 kHz	400 kHz	400 kHz	400 kHz
Write Cycle Time	—	5ms	5ms	5ms	5ms
Access Time	—	900 ns	900 ns	900 ns	900 ns
Voltage Supply Range	2.5V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

24AA04T-I/SN: Active product status with verified DiGi-Electronics programmability. Operates at 400 kHz with extended lower voltage support (1.7V minimum). Suitable for applications where reduced clock frequency is acceptable and lower supply voltage operation is beneficial. High inventory availability (15,637 pcs).

24LC04BHT-I/SN: Active product status with Tape & Reel packaging. Operates at 400 kHz with standard voltage range (2.5V ~ 5.5V). Moderate inventory availability (3,875 pcs). Programmability not verified.

24LC04BT-E/SN: Active product status with verified DiGi-Electronics programmability. Operates at 400 kHz with extended operating temperature range (-40°C ~ 125°C), providing superior thermal performance. Highest inventory availability (5,000,400 pcs). Recommended for applications requiring extended temperature operation.

24LC04BT-I/SN: Active product status with verified DiGi-Electronics programmability. Operates at 400 kHz with standard operating temperature range (-40°C ~ 85°C). Moisture Sensitivity Level 3 (168 hours). Inventory availability (4,810 pcs).

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original 24LC044T-I/SN.

Frequently Asked Questions (FAQ)

Q: Can 24LC044T-I/SN be directly replaced with 24LC04BT-E/SN? A: Yes. Both devices share identical memory capacity (4Kbit), organization (256 x 8 x 2), I2C interface, 8-SOIC package, and voltage supply range (2.5V ~ 5.5V). The 24LC04BT-E/SN operates at 400 kHz versus 1 MHz, but maintains full I2C protocol compatibility. The 24LC04BT-E/SN provides extended operating temperature range (-40°C ~ 125°C).

Q: What is the primary difference between 24AA04T-I/SN and 24LC04BT-I/SN? A: Both operate at 400 kHz with identical memory specifications. The 24AA04T-I/SN supports lower minimum supply voltage (1.7V versus 2.5V). The 24LC04BT-I/SN has Moisture Sensitivity Level 3 (168 hours) versus Level 1 (unlimited) for 24AA04T-I/SN.

Q: Are all substitute parts available in 8-SOIC package? A: Yes. All listed substitute parts are packaged in 8-SOIC (0.154", 3.90mm Width) surface mount configuration, matching the original 24LC044T-I/SN package specification.

Q: Does clock frequency reduction affect system compatibility? A: Clock frequency reduction from 1 MHz to 400 kHz does not affect I2C protocol compatibility or functional operation. Applications must verify that 400 kHz operation meets system timing requirements. I2C bus speed is typically determined by the master device and pull-up resistor configuration.

Q: Which substitute part has the best inventory availability? A: The 24LC04BT-E/SN has the highest inventory availability at 5,000,400 pcs, followed by 24AA04T-I/SN at 15,637 pcs.

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