24LC04BHT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC04BHT-I/ST is a 4Kbit I2C EEPROM memory IC manufactured by Microchip Technology in 8-TSSOP surface mount packaging. 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 85°C. The device is currently in active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent substitute parts are identified based on matching electrical specifications, memory organization, interface protocol, and physical packaging requirements.

Key Parameters

Parameter	Specification
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 ~ 85°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 24LC04BHT-I/ST are qualified based on the following critical parameters:

Electrical Compatibility: Memory size (4Kbit), memory format (EEPROM), interface protocol (I2C), clock frequency (400 kHz), access time (900 ns), write cycle time (5ms), and supply voltage range (2.5V ~ 5.5V) must match exactly.

Thermal Compatibility: Operating temperature range (-40°C ~ 85°C) must be maintained.

Physical Compatibility: Package type (8-TSSOP) and mounting type (Surface Mount) must be identical to ensure PCB layout compatibility.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status are maintained across all qualified substitutes.

Substitutes are grouped by packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and product status (Active versus Not For New Designs), which may affect procurement and long-term availability considerations.

Parameter Comparison

Parameter	24LC04BHT-I/ST	24LC04BT-I/ST	M24C04-WDW6TP
Manufacturer	Microchip Technology	Microchip Technology	STMicroelectronics
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 ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®
Product Status	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Availability	729 Pcs	5100 Pcs	19864 Pcs

Engineering Selection Recommendations

24LC04BT-I/ST (Microchip Technology): This part is a parametric equivalent with identical electrical and thermal specifications. Both devices are manufactured by Microchip Technology and maintain Active product status. The primary difference is packaging format: 24LC04BT-I/ST is supplied in Cut Tape & Digi-Reel format with significantly higher inventory availability (5100 units versus 729 units). This substitute is suitable for new designs and ongoing production.

M24C04-WDW6TP (STMicroelectronics): This part meets all electrical, thermal, and physical compatibility requirements. However, the product status is listed as Not For New Designs, indicating this device is in end-of-life phase. While parametrically equivalent, this substitute should be considered only for legacy system maintenance or when other options are unavailable. The memory organization differs (512 x 8 versus 256 x 8 x 2) but total capacity remains 4Kbit with identical I2C interface behavior.

Frequently Asked Questions (FAQ)

Q: Can 24LC04BT-I/ST be used as a direct replacement for 24LC04BHT-I/ST?

A: Yes. Both parts are parametrically equivalent with identical electrical specifications, operating temperature range, supply voltage requirements, and 8-TSSOP package dimensions. The only difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel), which does not affect electrical performance or PCB compatibility.

Q: What is the significance of the memory organization difference between 24LC04BHT-I/ST (256 x 8 x 2) and M24C04-WDW6TP (512 x 8)?

A: Both configurations provide 4Kbit total storage capacity. The different organization schemes reflect internal architecture differences between manufacturers but do not affect I2C protocol operation, addressing, or functional compatibility. The I2C interface presents the same 4Kbit address space to the system.

Q: Why is M24C04-WDW6TP marked as Not For New Designs?

A: This designation indicates the product is in end-of-life phase and the manufacturer is not recommending it for new circuit designs. While the part remains functionally equivalent and available in inventory, long-term availability cannot be guaranteed. For new designs, 24LC04BT-I/ST is the recommended choice.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 8-TSSOP package with identical pinout and electrical interface specifications. PCB layout and schematic connections are interchangeable.

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

A: 24LC04BHT-I/ST is supplied in Tape & Reel format, suitable for high-volume automated assembly. 24LC04BT-I/ST and M24C04-WDW6TP are supplied in Cut Tape & Digi-Reel format, which may be more suitable for lower-volume production or manual assembly operations. Packaging format does not affect component performance.

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