93LC56CT-I/MC EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93LC56CT-I/MC is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, designed for applications requiring serial data storage with Microwire interface protocol. This component operates across a wide supply voltage range of 2.5V to 5.5V and maintains active product status with full RoHS3 compliance. Substitute parts may be required due to inventory constraints, end-of-life considerations, or specific application requirements for alternative interface protocols or operating parameters.

Substiute Parts

93LC56CT-I/MC

Microchip TechnologyIn Stock: 162593LC56CT-I/MC Datasheet

Current PartRFQ

AT93C56B-MAHM-T

Microchip TechnologyIn Stock: 38723AT93C56B-MAHM-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The AT93C56B-MAHM-T qualifies as a direct substitute for the 93LC56CT-I/MC based on the following critical parameters:

Matching Parameters:

• Memory capacity: 2Kbit (identical)
• Memory organization: 256 x 8, 128 x 16 (identical)
• Memory type: Non-volatile EEPROM (identical)
• Operating temperature range: -40°C to 85°C (identical)
• Mounting type: Surface Mount (identical)
• Package form factor: 8-pin DFN/Mini Map (2x3mm) (compatible)
• Supply voltage compatibility: 1.7V – 5.5V (encompasses 2.5V – 5.5V requirement)
• RoHS3 compliance: Both parts compliant

Interface Protocol Consideration: The 93LC56CT-I/MC uses Microwire protocol at 3 MHz, while the AT93C56B-MAHM-T uses 3-Wire Serial protocol at 2 MHz. Both protocols are serial communication standards compatible with the same pin configuration and functional requirements for 2Kbit EEPROM applications.

Parameter Comparison

Engineering Selection Recommendations

Both the 93LC56CT-I/MC and AT93C56B-MAHM-T are active products with full RoHS3 compliance and REACH unaffected status, making either suitable for new designs and production environments. The 93LC56CT-I/MC offers higher clock frequency (3 MHz) and superior moisture sensitivity rating (MSL 1), while the AT93C56B-MAHM-T provides lower minimum supply voltage (1.7V) and faster write cycle time (5ms). Selection should be based on specific application requirements for clock speed, power supply constraints, and environmental storage conditions. Both parts maintain identical memory capacity and organization, ensuring functional compatibility in 2Kbit EEPROM applications.

Frequently Asked Questions (FAQ)

Q: Can the AT93C56B-MAHM-T directly replace the 93LC56CT-I/MC in existing designs?

A: Yes, provided the application firmware supports both Microwire and 3-Wire Serial protocols. The memory capacity, organization, and pin configuration are identical. Interface protocol differences require software compatibility verification.

Q: What is the difference between Microwire and 3-Wire Serial protocols?

A: Both are serial communication standards for EEPROM devices. Microwire operates at 3 MHz in the 93LC56CT-I/MC, while 3-Wire Serial operates at 2 MHz in the AT93C56B-MAHM-T. Protocol selection depends on microcontroller support and application timing requirements.

Q: Are the package dimensions identical between these parts?

A: Both use 8-pin DFN packages in 2x3mm form factor. The 93LC56CT-I/MC uses 8-VFDFN while the AT93C56B-MAHM-T uses 8-UFDFN, representing minor variations within the same physical footprint suitable for identical PCB layouts.

Q: What is the significance of the MSL rating difference?

A: The 93LC56CT-I/MC has MSL 1 (unlimited moisture exposure tolerance), while the AT93C56B-MAHM-T has MSL 3 (168-hour limit). For applications with extended storage in humid environments prior to assembly, the 93LC56CT-I/MC offers superior protection.

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

A: The AT93C56B-MAHM-T supports 1.7V – 5.5V, which encompasses the 93LC56CT-I/MC range of 2.5V – 5.5V. Applications operating at 2.5V or higher can use either part interchangeably from a voltage perspective.

Q: What is the write cycle time difference impact?

A: The AT93C56B-MAHM-T has a 5ms write cycle time compared to 6ms for the 93LC56CT-I/MC. This 1ms improvement may be relevant for time-critical data logging or frequent write applications, though both are within typical EEPROM performance ranges.