93AA56CT-I/ST EEPROM Memory IC Equivalent & Substitute Parts

Part Overview

The 93AA56CT-I/ST is a 2Kbit non-volatile EEPROM memory IC manufactured by Microchip Technology, featuring Microwire serial interface protocol and 8-TSSOP surface mount packaging. This component is actively produced and widely used in embedded systems requiring low-power, persistent data storage with serial communication capabilities. Substitute parts are identified when equivalent memory capacity, interface compatibility, package form factor, and electrical operating ranges align with application requirements.

Substiute Parts

93AA56CT-I/ST

Microchip TechnologyIn Stock: 395793AA56CT-I/ST Datasheet

Current PartRFQ

AT93C56B-XHM-T

Microchip TechnologyIn Stock: 8245AT93C56B-XHM-T Datasheet

MFR RecommendedRFQ

M93C56-RDW3TP/K

STMicroelectronicsIn Stock: 4987M93C56-RDW3TP/K Datasheet

MFR RecommendedRFQ

M93C56-WDW6TP

STMicroelectronicsIn Stock: 52359M93C56-WDW6TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 93AA56CT-I/ST are qualified based on the following criteria:

Core Compatibility Parameters:

• Memory capacity: 2Kbit
• Memory organization: 256 x 8 or 128 x 16
• Package form factor: 8-TSSOP with 0.173" width and 4.40mm dimensions
• Surface mount technology
• Non-volatile EEPROM technology
• Supply voltage range overlap with 1.8V ~ 5.5V
• Operating temperature range: minimum -40°C, maximum 85°C or higher

Interface Compatibility: Substitutes are grouped by serial interface protocol. The 93AA56CT-I/ST uses Microwire protocol. Substitutes using 3-Wire Serial protocol are included when memory organization and electrical characteristics remain equivalent, as both protocols support the same data structure and access patterns for 2Kbit EEPROM devices.

Electrical Compatibility: All substitutes maintain ROHS3 compliance, unlimited moisture sensitivity level (MSL 1), and identical HTSUS classification, ensuring regulatory and supply chain compatibility.

Parameter Comparison

Engineering Selection Recommendations

AT93C56B-XHM-T (Microchip Technology): This substitute maintains Microchip Technology manufacturing continuity and identical operating temperature range. The 3-Wire Serial interface differs from the Microwire protocol of the main part; however, both protocols support equivalent data access for 2Kbit EEPROM organization. Supply voltage range extends to 1.7V, providing broader low-voltage compatibility. Write cycle time is reduced to 5ms. Product status is Active with verified DiGi-Electronics programmability.

M93C56-RDW3TP/K (STMicroelectronics): This substitute provides Microwire interface alignment with the main part and extends operating temperature range to -40°C ~ 125°C, supporting automotive-grade applications with AEC-Q100 qualification. Supply voltage range matches the main part at 1.8V ~ 5.5V. Clock frequency and write cycle time are reduced to 2 MHz and 5ms respectively. Product status is Active.

M93C56-WDW6TP (STMicroelectronics): This substitute maintains Microwire interface protocol and 8-TSSOP packaging. Supply voltage range is restricted to 2.5V ~ 5.5V, limiting low-voltage applications below 2.5V. Operating temperature range matches the main part at -40°C ~ 85°C. Clock frequency and write cycle time are reduced to 2 MHz and 5ms. Packaging is available in Cut Tape and Digi-Reel format. Product status is Active with highest inventory availability at 52,330 pieces.

Frequently Asked Questions (FAQ)

Q: Can AT93C56B-XHM-T replace 93AA56CT-I/ST in existing designs? A: AT93C56B-XHM-T uses 3-Wire Serial protocol instead of Microwire. Both protocols support identical 2Kbit memory organization and data structures. Interface compatibility depends on the host controller's serial communication capability. Verify that the application circuit supports 3-Wire Serial protocol before substitution.

Q: What is the difference between Microwire and 3-Wire Serial interfaces? A: Both are serial communication protocols for EEPROM devices with equivalent data access patterns for 2Kbit memory. The specific protocol implementation differs in signal timing and control sequences. Host microcontroller firmware must support the selected protocol.

Q: Are M93C56-RDW3TP/K and M93C56-WDW6TP interchangeable? A: Both parts use Microwire protocol and share identical memory specifications. M93C56-RDW3TP/K supports -40°C ~ 125°C operating temperature with AEC-Q100 automotive qualification. M93C56-WDW6TP operates at -40°C ~ 85°C with restricted supply voltage range of 2.5V ~ 5.5V. Select based on temperature and voltage requirements.

Q: Does supply voltage range affect substitution compatibility? A: Yes. The main part operates at 1.8V ~ 5.5V. M93C56-WDW6TP is limited to 2.5V ~ 5.5V, making it unsuitable for applications requiring operation below 2.5V. AT93C56B-XHM-T extends to 1.7V, providing broader low-voltage support. Verify application voltage requirements before selection.

Q: What is the impact of reduced clock frequency on performance? A: The main part operates at 3 MHz. All substitutes operate at 2 MHz, reducing maximum serial communication speed by approximately 33%. Write cycle time is also reduced from 6ms to 5ms. Verify that application timing requirements accommodate 2 MHz operation.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance, identical to the main part, ensuring regulatory compatibility for restricted substance requirements.