24LC04BT-E/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC04BT-E/ST is a 4Kbit I2C EEPROM memory IC manufactured by Microchip Technology in an 8-TSSOP surface mount package. This non-volatile memory device operates at 400 kHz I2C clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V across an operating temperature range of -40°C to 125°C. The device is ROHS3 compliant and carries an active product status. Equivalent and substitute parts are identified when component availability is limited, procurement lead times are extended, or inventory requirements necessitate alternative sourcing options while maintaining functional and electrical compatibility.

Key Parameters

Parameter	Value
Memory Size	4Kbit
Memory Format	EEPROM
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5ms
Voltage Supply Range	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 24LC04BT-E/ST are qualified based on the following critical parameters that determine functional and electrical compatibility:

Memory Size: 4Kbit capacity
Memory Interface: I2C protocol
Clock Frequency: 400 kHz operation
Access Time: 900 ns
Write Cycle Time: 5ms
Voltage Supply Range: 2.5V ~ 5.5V
Operating Temperature Range: -40°C ~ 125°C
Package Type: 8-TSSOP form factor
Mounting Type: Surface Mount

Substitutes are categorized as direct manufacturer equivalents or parametric equivalents. Direct equivalents maintain identical specifications across all electrical and mechanical parameters. Parametric equivalents meet all critical functional requirements but may differ in memory organization, packaging format, or manufacturer qualification levels while preserving pin compatibility and electrical performance.

Parameter Comparison

Parameter	24LC04BT-E/ST (Main)	24LC04B-E/ST (Direct Equivalent)	CAV24C04YE-GT3 (Parametric Equivalent)
Manufacturer	Microchip Technology	Microchip Technology	onsemi
Memory Size	4Kbit	4Kbit	4Kbit
Memory Organization	256 x 8 x 2	256 x 8 x 2	512 x 8
Memory Interface	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	900 ns
Write Cycle Time	5ms	5ms	5ms
Voltage Supply	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tube	Tube	Tape & Reel (TR)
Qualification	Standard	Standard	AEC-Q100 Automotive

Engineering Selection Recommendations

24LC04B-E/ST (Direct Equivalent): This part is a direct substitute manufactured by Microchip Technology with identical electrical specifications, memory organization, and package configuration. Both devices maintain active product status and ROHS3 compliance. Selection of this part introduces no functional or compatibility risk and is suitable for direct replacement in applications where Microchip sourcing is preferred or where tube packaging format is required.

CAV24C04YE-GT3 (Parametric Equivalent): This onsemi part meets all critical electrical and timing parameters required for I2C EEPROM functionality at 4Kbit capacity. The device differs in memory organization (512 x 8 versus 256 x 8 x 2) and includes AEC-Q100 automotive qualification. This part is supplied in Tape & Reel format and carries active product status with ROHS3 compliance. Selection of this part is appropriate for applications requiring automotive-grade qualification or where tape & reel packaging is specified. The memory organization difference does not affect functional compatibility in standard I2C EEPROM applications.

Frequently Asked Questions (FAQ)

Q: Can 24LC04B-E/ST be used as a direct replacement for 24LC04BT-E/ST?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications, memory capacity, I2C interface, timing parameters, voltage supply range, operating temperature range, and 8-TSSOP package configuration. The primary difference is packaging format (tube versus the original specification). Pin compatibility and functional performance are equivalent.

Q: What is the difference between memory organization 256 x 8 x 2 and 512 x 8?

A: Both configurations provide 4Kbit total memory capacity. The 256 x 8 x 2 organization uses two 256-byte pages, while 512 x 8 uses a single 512-byte page. From an I2C EEPROM functional perspective, this difference does not affect compatibility in standard applications, as both support identical I2C protocol operation and timing specifications.

Q: Is CAV24C04YE-GT3 suitable for non-automotive applications?

A: Yes. CAV24C04YE-GT3 meets all electrical and timing specifications required for standard I2C EEPROM operation. AEC-Q100 automotive qualification indicates enhanced reliability testing and quality assurance but does not restrict use in non-automotive applications. This part is functionally compatible with the 24LC04BT-E/ST across all specified operating parameters.

Q: What packaging format differences exist between these parts?

A: 24LC04BT-E/ST and 24LC04B-E/ST are supplied in tube packaging. CAV24C04YE-GT3 is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for high-volume automated assembly processes, while tube packaging is typical for lower-volume or manual assembly applications. Both formats contain identical die and electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All three parts listed carry ROHS3 compliance certification, confirming conformance to Restriction of Hazardous Substances regulations. All parts are also REACH unaffected and carry EAR99 ECCN classification.

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