24LC044T-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 24LC044T-I/ST is a 4Kbit I2C EEPROM memory IC manufactured by Microchip Technology, housed in an 8-TSSOP surface mount package. This non-volatile memory device operates across a wide supply voltage range of 2.5V to 5.5V and supports industrial temperature ranges from -40°C to 85°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent memory capacity, interface protocol, package form factor, and electrical specifications align within acceptable engineering tolerances.

Substiute Parts

24LC044T-I/ST

Microchip TechnologyIn Stock: 95624LC044T-I/ST Datasheet

Current PartRFQ

24LC04BT-I/ST

Microchip TechnologyIn Stock: 511524LC04BT-I/ST Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 24LC04BT-I/ST qualifies as a direct substitute for the 24LC044T-I/ST based on the following alignment of critical parameters:

• Memory Capacity: Both devices provide 4Kbit storage with identical 256 x 8 x 2 organization
• Interface Protocol: Both implement I2C serial communication
• Package Form Factor: Both use 8-TSSOP surface mount packaging with identical physical dimensions (0.173", 4.40mm Width)
• Supply Voltage Range: Both operate across 2.5V to 5.5V
• Operating Temperature Range: Both support -40°C to 85°C industrial temperature specification
• Compliance Standards: Both are ROHS3 compliant with MSL rating of 1 (Unlimited)
• Product Status: Both are active production parts

Substitution is valid where system design accommodates the specified clock frequency and access time characteristics of the substitute device.

Parameter Comparison

Engineering Selection Recommendations

Both the 24LC044T-I/ST and 24LC04BT-I/ST are active production components from Microchip Technology with identical ROHS3 compliance and unlimited moisture sensitivity ratings. The primary differentiation lies in clock frequency specification: the main part operates at 1 MHz while the substitute operates at 400 kHz. System designs requiring maximum I2C bus speed of 1 MHz must retain the 24LC044T-I/ST. Applications operating at standard I2C speeds of 400 kHz or lower can utilize the 24LC04BT-I/ST substitute without functional impact. Both devices maintain identical supply voltage tolerance (2.5V to 5.5V) and industrial temperature range (-40°C to 85°C), ensuring thermal and electrical compatibility in equivalent system environments.

Frequently Asked Questions (FAQ)

Q: Can the 24LC04BT-I/ST replace the 24LC044T-I/ST in all applications?

A: Substitution is valid for applications operating at I2C bus speeds of 400 kHz or lower. Systems requiring 1 MHz I2C operation must use the 24LC044T-I/ST.

Q: Are the physical packages identical?

A: Yes. Both parts use 8-TSSOP surface mount packaging with identical dimensions (0.173", 4.40mm Width), enabling direct PCB footprint compatibility.

Q: What is the difference in memory capacity between these parts?

A: Both devices provide identical 4Kbit storage capacity with 256 x 8 x 2 organization. No capacity difference exists.

Q: Do both parts support the same supply voltage range?

A: Yes. Both the 24LC044T-I/ST and 24LC04BT-I/ST operate across 2.5V to 5.5V supply voltage range.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited) and REACH unaffected status.

Q: What is the operating temperature range for both devices?

A: Both parts support -40°C to 85°C operating temperature range, suitable for industrial applications.

Q: How do the I2C clock frequencies differ?

A: The 24LC044T-I/ST supports 1 MHz I2C operation, while the 24LC04BT-I/ST supports 400 kHz. Standard I2C protocol defines 400 kHz as the fast mode specification.