Equivalent & Substitute Parts for 24LC04BH-I/ST

Part Overview

The 24LC04BH-I/ST is a 4Kbit EEPROM memory IC manufactured by Microchip Technology, featuring I2C interface communication at 400 kHz with 900 ns access time. This component is housed in an 8-TSSOP 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 carries ROHS3 compliance certification. Equivalent and substitute parts are identified based on matching memory capacity, interface protocol, package type, and electrical operating parameters that ensure functional interchangeability within system designs.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Format	EEPROM
Memory Organization	256 x 8 x 2
Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Supply Voltage	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-TSSOP
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC04BH-I/ST is determined by the following critical parameters: 4Kbit memory capacity, EEPROM non-volatile memory format with 256 x 8 x 2 organization, I2C serial interface, 8-TSSOP surface mount package, and compatible supply voltage operating range. Parts are grouped into three categories based on their relationship to the main part:

MFR Recommended Substitutes maintain full electrical and mechanical compatibility with identical or superior performance characteristics. These parts are manufacturer-endorsed alternatives that can be directly substituted without design modification.

Parametric Equivalents match all critical functional parameters but may differ in specific operating characteristics such as temperature range or programmability verification status. These parts provide functional equivalence within defined application constraints.

Substitution logic prioritizes package compatibility, memory interface protocol, and voltage supply range as non-negotiable parameters. Clock frequency, access time, and temperature range variations are secondary considerations that must be evaluated against specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Access Time	Supply Voltage	Operating Temperature	Package	Product Status	Inventory
24LC04BH-I/ST	Microchip Technology	4Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	734 Pcs
24AA04-I/ST	Microchip Technology	4Kbit	400 kHz	900 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	20340 Pcs
24AA044-I/ST	Microchip Technology	4Kbit	1 MHz	400 ns	1.7V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	832 Pcs
24LC04B-E/ST	Microchip Technology	4Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 125°C	8-TSSOP	Active	5984 Pcs
24LC04B-I/ST	Microchip Technology	4Kbit	400 kHz	900 ns	2.5V ~ 5.5V	-40°C ~ 85°C	8-TSSOP	Active	2100 Pcs

Engineering Selection Recommendations

24AA04-I/ST serves as the primary MFR recommended substitute, offering extended lower voltage operation at 1.7V minimum supply compared to the 2.5V minimum of the main part. This part maintains identical clock frequency, access time, and temperature range specifications. With 20340 units in stock, this substitute provides superior availability for high-volume applications.

24AA044-I/ST functions as a performance-enhanced substitute with 1 MHz clock frequency and 400 ns access time, delivering 2.5x faster operation than the main part. The extended lower voltage range of 1.7V to 5.5V provides additional design flexibility. This part is suitable for applications requiring higher I2C bus speeds within the same 4Kbit memory capacity and 8-TSSOP package footprint.

24LC04B-E/ST provides an extended temperature range variant rated to 125°C maximum operating temperature, compared to 85°C for the main part. This substitute maintains identical electrical specifications and clock frequency characteristics, making it suitable for industrial and high-temperature applications. Programmability verification status is confirmed for this part.

24LC04B-I/ST represents a parametric equivalent with identical electrical and thermal specifications to the main part. This substitute shares the same base product number designation and maintains full compatibility across all critical parameters. Programmability verification status is confirmed.

All substitute parts maintain ROHS3 compliance, 8-TSSOP package configuration, and Active product status. Selection should be based on specific application requirements regarding voltage supply range, operating temperature limits, and I2C bus speed requirements.

Frequently Asked Questions (FAQ)

Q: Can 24AA04-I/ST be used as a direct replacement for 24LC04BH-I/ST?

A: Yes. The 24AA04-I/ST maintains identical memory capacity, I2C interface, clock frequency, access time, and 8-TSSOP package configuration. The extended lower voltage range (1.7V minimum versus 2.5V) provides additional operational flexibility without compromising compatibility.

Q: What is the primary difference between 24AA044-I/ST and the main part?

A: The 24AA044-I/ST operates at 1 MHz clock frequency with 400 ns access time, compared to 400 kHz and 900 ns for the main part. This provides faster I2C communication and reduced access latency. The lower voltage minimum of 1.7V also extends operational range. All other parameters including memory capacity and package type remain identical.

Q: Is 24LC04B-E/ST suitable for high-temperature applications?

A: Yes. The 24LC04B-E/ST is rated for operating temperatures up to 125°C, compared to 85°C for the main part. This extended temperature range makes it suitable for industrial and automotive applications requiring higher thermal tolerance. All other electrical specifications remain identical to the main part.

Q: Are all substitute parts available in the same 8-TSSOP package?

A: Yes. All listed substitute parts utilize the 8-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring mechanical and footprint compatibility with designs specified for the 24LC04BH-I/ST.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts maintain ROHS3 compliance, REACH Unaffected status, and Moisture Sensitivity Level 1 (Unlimited). These certifications ensure environmental and regulatory compliance across all listed alternatives.

Q: Can 24AA044-I/ST operate at the same I2C bus speed as the main part?

A: Yes. The 24AA044-I/ST supports 400 kHz I2C operation and is backward compatible with systems designed for 400 kHz communication. The part's 1 MHz maximum frequency capability provides additional headroom for faster bus implementations without requiring design changes.

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