93AA56CT-I/MC Equivalent & Substitute Parts

Part Overview

The 93AA56CT-I/MC is a 2Kbit EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and operating across a wide voltage range of 1.8V to 5.5V. This non-volatile memory device is designed for applications requiring reliable data retention in embedded systems, industrial equipment, and consumer electronics. The part is currently in active production status with verified programmability through DiGi-Electronics. Substitute parts are identified when equivalent memory capacity, compatible interface protocols, and matching electrical specifications are required due to inventory constraints, supply chain considerations, or design optimization needs.

Substiute Parts

93AA56CT-I/MC

Microchip TechnologyIn Stock: 104993AA56CT-I/MC Datasheet

Current PartRFQ

AT93C56B-MAHM-T

Microchip TechnologyIn Stock: 38723AT93C56B-MAHM-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 93AA56CT-I/MC is determined by the following critical parameters:

Memory Capacity Match: Substitute parts must provide 2Kbit storage capacity with identical memory organization (256 x 8 or 128 x 16 bit configuration).

Interface Protocol Compatibility: The primary part uses Microwire serial interface. Substitute parts utilizing 3-Wire Serial protocol are functionally compatible as both protocols support equivalent data transfer operations for this memory class.

Electrical Specifications: Supply voltage range must encompass or match the 1.8V to 5.5V operating window. Operating temperature range must maintain -40°C to 85°C minimum specification.

Package Compatibility: Surface mount packages with 8-pin DFN footprints (2x3mm form factor) are mechanically and electrically interchangeable.

Regulatory Compliance: Parts must maintain ROHS3 compliance and equivalent moisture sensitivity ratings (MSL 3).

Parameter Comparison

Engineering Selection Recommendations

The AT93C56B-MAHM-T serves as a qualified substitute for the 93AA56CT-I/MC based on the following engineering criteria:

Memory Equivalence: Both parts provide identical 2Kbit capacity with matching memory organization, ensuring functional parity for data storage applications.

Interface Protocol: While the primary part implements Microwire protocol and the substitute uses 3-Wire Serial protocol, both are industry-standard serial EEPROM interfaces supporting equivalent read/write operations. System firmware must be configured to support the selected protocol.

Electrical Performance: The substitute operates within a marginally lower minimum voltage threshold (1.7V versus 1.8V) while maintaining the 5.5V maximum. The 2 MHz clock frequency of the substitute is lower than the primary part's 3 MHz specification; however, this does not restrict functionality in applications where timing margins are adequate. The substitute's 5ms write cycle time is faster than the primary part's 6ms specification.

Regulatory and Environmental Compliance: Both parts maintain ROHS3 compliance, identical moisture sensitivity ratings, and equivalent operating temperature ranges, ensuring compliance with industrial and consumer electronics standards.

Product Status: The primary part maintains active production status with verified programmability. The substitute is in active production with standard programmability support.

Frequently Asked Questions (FAQ)

Q: Can the AT93C56B-MAHM-T directly replace the 93AA56CT-I/MC without firmware modifications?

A: Direct pin-for-pin replacement is not possible due to different serial interface protocols (Microwire versus 3-Wire Serial). System firmware must be reconfigured to support the substitute part's communication protocol. Physical footprint compatibility exists for both 8-DFN package variants.

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

A: Both protocols are serial EEPROM communication standards supporting equivalent data transfer operations. Microwire uses dedicated clock and data lines with specific timing requirements. 3-Wire Serial uses chip select, clock, and bidirectional data lines. Protocol selection depends on system controller capabilities and existing firmware implementation.

Q: Are there voltage supply considerations when substituting the AT93C56B-MAHM-T?

A: The substitute part's minimum voltage specification is 1.7V compared to the primary part's 1.8V minimum. In applications operating at or near 1.8V, verify that the substitute's 1.7V minimum does not introduce unintended operational margins. Both parts support the full 5.5V maximum specification.

Q: How do the clock frequency differences affect system performance?

A: The substitute part operates at 2 MHz maximum clock frequency versus the primary part's 3 MHz. This represents a lower maximum data transfer rate. Applications requiring the primary part's 3 MHz performance must use the 93AA56CT-I/MC. Applications with adequate timing margins can operate with the substitute's 2 MHz specification.

Q: Are the 8-VFDFN and 8-UFDFN packages mechanically interchangeable?

A: Both packages are 8-pin DFN variants with 2x3mm form factors and exposed pad designs. Mechanical footprint compatibility exists for PCB layout purposes. Verify specific package dimensions and thermal characteristics with component datasheets for critical thermal management applications.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the 93AA56CT-I/MC and AT93C56B-MAHM-T maintain ROHS3 compliance, identical MSL 3 moisture sensitivity ratings, and equivalent REACH and ECCN classifications, ensuring compliance with industrial and consumer electronics regulatory requirements.