24LC04BT/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC04BT/ST is a 4Kbit I2C EEPROM memory integrated circuit manufactured by Microchip Technology. This non-volatile memory device operates at 400 kHz clock frequency with 900 ns access time and supports supply voltages from 2.5V to 5.5V. The component is housed in an 8-TSSOP surface mount package and is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when electrical specifications, memory organization, interface protocol, and package dimensions remain identical or functionally equivalent, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Specification
Memory Size	4Kbit
Memory Organization	256 x 8 x 2
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
Voltage Supply Range	2.5V ~ 5.5V
Package Type	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 24LC04BT/ST is determined by strict equivalence across the following critical parameters:

Memory capacity and organization (4Kbit, 256 x 8 x 2 configuration) must remain unchanged. The I2C interface protocol and 400 kHz clock frequency are mandatory for circuit compatibility. Electrical performance specifications including 900 ns access time and 5 ms write cycle time must be maintained. Supply voltage range (2.5V ~ 5.5V) establishes the operational envelope. Package type (8-TSSOP) and surface mount configuration define physical compatibility. All substitute parts must maintain ROHS3 compliance and identical base product number (24LC04B) classification.

The identified substitute part 24LC04BT-I/ST meets all electrical and mechanical equivalence criteria, with the primary distinction being packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and extended operating temperature range.

Parameter Comparison

Parameter	24LC04BT/ST (Main Part)	24LC04BT-I/ST (Substitute)
Manufacturer	Microchip Technology	Microchip Technology
Memory Size	4Kbit	4Kbit
Memory Organization	256 x 8 x 2	256 x 8 x 2
Memory Interface	I2C	I2C
Clock Frequency	400 kHz	400 kHz
Access Time	900 ns	900 ns
Write Cycle Time	5 ms	5 ms
Voltage Supply Range	2.5V ~ 5.5V	2.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Package Type	8-TSSOP (0.173", 4.40mm Width)	8-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Product Status	Active	Active

Engineering Selection Recommendations

Both the 24LC04BT/ST and 24LC04BT-I/ST are active production components from Microchip Technology with ROHS3 compliance and REACH unaffected status. The 24LC04BT-I/ST offers an extended operating temperature range (-40°C to 85°C) compared to the main part (0°C to 70°C), making it suitable for applications requiring wider thermal operation. The substitute part is available in Cut Tape and Digi-Reel packaging formats, providing flexibility for different procurement and assembly workflows. Both components carry identical electrical specifications and package dimensions, ensuring direct functional interchangeability in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the 24LC04BT-I/ST replace the 24LC04BT/ST in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent with identical memory capacity, I2C interface, clock frequency, access time, and package dimensions. The substitute part features an extended operating temperature range, making it compatible with the original part's temperature specification.

Q: What is the primary difference between these two parts?

A: The main differences are packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and operating temperature range. The 24LC04BT-I/ST operates from -40°C to 85°C, while the 24LC04BT/ST operates from 0°C to 70°C. Both maintain identical electrical performance specifications.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain ROHS3 compliance, REACH unaffected status, and identical EAR99 and HTSUS classifications. Moisture sensitivity level is unlimited (MSL 1) for both components.

Q: Does the extended temperature range of the substitute part affect circuit design?

A: No. The substitute part's extended temperature range is a superset of the original part's range, ensuring compatibility across all operating conditions specified for the original design.

Q: What packaging considerations apply when selecting between these parts?

A: The 24LC04BT/ST is supplied in Tape & Reel format, while the 24LC04BT-I/ST is available in Cut Tape and Digi-Reel formats. Selection depends on procurement volume, assembly equipment compatibility, and inventory management requirements.

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