24LC044T-I/MS Equivalent & Substitute Parts

Part Overview

The 24LC044T-I/MS is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface operation at 1 MHz clock frequency. This non-volatile memory device is housed in an 8-MSOP surface mount package and operates across a supply voltage range of 2.5V to 5.5V with an operating temperature range of -40°C to 85°C. The part maintains Active product status and holds ROHS3 compliance certification. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support alternative packaging or performance specifications while maintaining core functional compatibility.

Key Parameters

Parameter	Specification
Memory Size	4Kbit
Memory Format	EEPROM
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 Type	8-MSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC044T-I/MS are qualified based on the following core electrical and mechanical parameters:

Memory capacity: 4Kbit EEPROM
Memory organization: 256 x 8 x 2
Interface protocol: I2C
Package form factor: 8-MSOP surface mount
Operating temperature range: -40°C to 85°C
RoHS compliance: ROHS3 Compliant
Moisture sensitivity level: 1 (Unlimited)

Substitutes are grouped by their adherence to these parameters. Variations in clock frequency, access time, supply voltage range, and packaging format (Tape & Reel vs. Cut Tape) are documented to enable informed selection based on application requirements and inventory availability.

Parameter Comparison

Parameter	24LC044T-I/MS	24AA044T-I/MS	24LC04BT-I/MS
Memory Size	4Kbit	4Kbit	4Kbit
Memory Format	EEPROM	EEPROM	EEPROM
Memory Organization	256 x 8 x 2	256 x 8 x 2	256 x 8 x 2
Memory Interface	I2C	I2C	I2C
Clock Frequency	1 MHz	1 MHz	400 kHz
Access Time	Not specified	400 ns	900 ns
Write Cycle Time	Not specified	5 ms	5 ms
Voltage Supply Range	2.5V ~ 5.5V	1.7V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-MSOP	8-MSOP	8-MSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Not specified	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the primary part. Selection between substitutes depends on application-specific requirements:

The 24AA044T-I/MS provides extended supply voltage range operation (1.7V minimum versus 2.5V minimum) and maintains the 1 MHz clock frequency of the primary part, with documented 400 ns access time. This part is available in Tape & Reel packaging format.

The 24LC04BT-I/MS operates at reduced clock frequency (400 kHz versus 1 MHz) with correspondingly longer access time (900 ns). This part maintains the 2.5V minimum supply voltage specification and is available in Cut Tape and Digi-Reel® packaging formats. DiGi-Electronics Programmable verification status is confirmed for this part.

All three parts share identical memory capacity, organization, I2C interface protocol, operating temperature range, and 8-MSOP package form factor, establishing functional compatibility for direct substitution within these electrical and mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can 24AA044T-I/MS directly replace 24LC044T-I/MS in all applications?

A: The 24AA044T-I/MS maintains identical memory capacity, organization, I2C interface, clock frequency, and operating temperature range. The extended supply voltage range (1.7V minimum) provides broader compatibility with lower-voltage systems. Packaging format differs (Tape & Reel versus unspecified), which may affect procurement and assembly processes but not electrical function.

Q: What is the primary difference between 24LC04BT-I/MS and the primary part?

A: The 24LC04BT-I/MS operates at 400 kHz clock frequency compared to 1 MHz, resulting in longer access time (900 ns versus unspecified). Supply voltage range and operating temperature remain compatible. This part is suitable for applications where reduced clock frequency is acceptable or preferred.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the 8-MSOP package form factor with identical physical dimensions (0.118", 3.00mm width), ensuring footprint compatibility on the same printed circuit board.

Q: What packaging options are available for each part?

A: The 24LC044T-I/MS packaging format is not specified in available documentation. The 24AA044T-I/MS is supplied in Tape & Reel format. The 24LC04BT-I/MS is available in Cut Tape and Digi-Reel® formats. Packaging selection affects procurement, handling, and assembly processes.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code 8542.32.0051. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: Which substitute part should be selected for lowest power supply voltage operation?

A: The 24AA044T-I/MS supports operation at 1.7V minimum supply voltage, compared to 2.5V minimum for both the primary part and 24LC04BT-I/MS. This part is specified for applications requiring extended low-voltage operation.

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