24LC08BT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC08BT-I/ST is an 8Kbit I2C EEPROM memory IC manufactured by Microchip Technology in 8-TSSOP surface mount packaging. This non-volatile memory device operates across a 2.5V to 5.5V supply range with 400 kHz I2C interface capability and 900 ns access time. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified when designs require alternative sourcing, packaging formats, or when primary suppliers have inventory constraints.

Key Parameters

Parameter	Value
Memory Type	Non-Volatile EEPROM
Memory Size	8Kbit
Memory Interface	I2C
Clock Frequency	400 kHz
Access Time	900 ns
Write Cycle Time	5 ms
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

Substitution eligibility for the 24LC08BT-I/ST is determined by matching the following critical parameters: 8Kbit memory capacity, I2C interface protocol, 400 kHz clock frequency, 900 ns access time, 5 ms write cycle time, 8-TSSOP package format, and surface mount mounting type. Supply voltage range compatibility and operating temperature range must encompass or match the primary part specifications. All substitute parts must maintain ROHS3 compliance and identical electrical interface characteristics to ensure functional interchangeability in circuit designs.

Parameter Comparison

Parameter	24LC08BT-I/ST (Microchip)	24LC08B-I/ST (Microchip)	CAT24C08YI-GT3 (onsemi)	M24C08-WDW6TP (STMicroelectronics)
Manufacturer	Microchip Technology	Microchip Technology	onsemi	STMicroelectronics
Memory Size	8Kbit	8Kbit	8Kbit	8Kbit
Memory Organization	256 x 8 x 4	256 x 8 x 4	1K x 8	1K x 8
Memory Interface	I2C	I2C	I2C	I2C
Clock Frequency	400 kHz	400 kHz	400 kHz	400 kHz
Access Time	900 ns	900 ns	900 ns	900 ns
Write Cycle Time	5 ms	5 ms	5 ms	5 ms
Voltage Supply Range	2.5V ~ 5.5V	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	-40°C ~ 85°C
Package Type	8-TSSOP	8-TSSOP	8-TSSOP	8-TSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active	Not For New Designs
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

The 24LC08B-I/ST from Microchip Technology is a direct substitute with identical electrical specifications and active product status. The primary difference is packaging format: the 24LC08B-I/ST is supplied in tube packaging versus cut tape and digi-reel for the 24LC08BT-I/ST. Both parts are actively manufactured and ROHS3 compliant.

The CAT24C08YI-GT3 from onsemi is a direct functional equivalent with identical core electrical parameters. This part offers an extended lower voltage supply range (1.7V minimum versus 2.5V), providing additional design flexibility for low-power applications. The CAT24C08YI-GT3 maintains active product status and ROHS3 compliance.

The M24C08-WDW6TP from STMicroelectronics meets all electrical and package specifications but carries a "Not For New Designs" product status designation. This part is suitable for legacy system maintenance and replacement applications where existing designs already incorporate this component. The M24C08-WDW6TP is ROHS3 compliant and remains in inventory.

Frequently Asked Questions (FAQ)

Q: Can the 24LC08B-I/ST replace the 24LC08BT-I/ST in production designs?

A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications, memory capacity, I2C interface, access time, and operating parameters. The only difference is packaging format (tube versus cut tape/digi-reel). Verify that your assembly equipment can accommodate the tube packaging format.

Q: Is the CAT24C08YI-GT3 compatible with designs specified for 2.5V minimum supply voltage?

A: Yes. The CAT24C08YI-GT3 supports the full 2.5V to 5.5V range required by the 24LC08BT-I/ST, plus extends to 1.7V minimum. Designs operating at 2.5V or higher will function identically with either part.

Q: Why is the M24C08-WDW6TP marked "Not For New Designs"?

A: This designation indicates the manufacturer has discontinued active development and recommends alternative parts for new product designs. The M24C08-WDW6TP remains available for existing applications and legacy system support.

Q: Are all substitute parts available in 8-TSSOP surface mount packaging?

A: Yes. All listed substitute parts use identical 8-TSSOP (0.173", 4.40mm Width) surface mount packaging, ensuring PCB layout and assembly compatibility with the 24LC08BT-I/ST.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. The 24LC08B-I/ST, CAT24C08YI-GT3, and M24C08-WDW6TP are all ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

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